three.js/build/three.js

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.THREE = global.THREE || {})));
}(this, function (exports) { 'use strict';

  // Polyfills

  if ( Number.EPSILON === undefined ) {

  	Number.EPSILON = Math.pow( 2, - 52 );

  }

  //

  if ( Math.sign === undefined ) {

  	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign

  	Math.sign = function ( x ) {

  		return ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : + x;

  	};

  }

  if ( Function.prototype.name === undefined ) {

  	// Missing in IE9-11.
  	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name

  	Object.defineProperty( Function.prototype, 'name', {

  		get: function () {

  			return this.toString().match( /^\s*function\s*(\S*)\s*\(/ )[ 1 ];

  		}

  	} );

  }

  if ( Object.assign === undefined ) {

  	// Missing in IE.
  	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

  	( function () {

  		Object.assign = function ( target ) {

  			'use strict';

  			if ( target === undefined || target === null ) {

  				throw new TypeError( 'Cannot convert undefined or null to object' );

  			}

  			var output = Object( target );

  			for ( var index = 1; index < arguments.length; index ++ ) {

  				var source = arguments[ index ];

  				if ( source !== undefined && source !== null ) {

  					for ( var nextKey in source ) {

  						if ( Object.prototype.hasOwnProperty.call( source, nextKey ) ) {

  							output[ nextKey ] = source[ nextKey ];

  						}

  					}

  				}

  			}

  			return output;

  		};

  	} )();

  }

  /**
   * https://github.com/mrdoob/eventdispatcher.js/
   */

  function EventDispatcher() {}

  Object.assign( EventDispatcher.prototype, {

  	addEventListener: function ( type, listener ) {

  		if ( this._listeners === undefined ) this._listeners = {};

  		var listeners = this._listeners;

  		if ( listeners[ type ] === undefined ) {

  			listeners[ type ] = [];

  		}

  		if ( listeners[ type ].indexOf( listener ) === - 1 ) {

  			listeners[ type ].push( listener );

  		}

  	},

  	hasEventListener: function ( type, listener ) {

  		if ( this._listeners === undefined ) return false;

  		var listeners = this._listeners;

  		if ( listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1 ) {

  			return true;

  		}

  		return false;

  	},

  	removeEventListener: function ( type, listener ) {

  		if ( this._listeners === undefined ) return;

  		var listeners = this._listeners;
  		var listenerArray = listeners[ type ];

  		if ( listenerArray !== undefined ) {

  			var index = listenerArray.indexOf( listener );

  			if ( index !== - 1 ) {

  				listenerArray.splice( index, 1 );

  			}

  		}

  	},

  	dispatchEvent: function ( event ) {

  		if ( this._listeners === undefined ) return;

  		var listeners = this._listeners;
  		var listenerArray = listeners[ event.type ];

  		if ( listenerArray !== undefined ) {

  			event.target = this;

  			var array = [], i = 0;
  			var length = listenerArray.length;

  			for ( i = 0; i < length; i ++ ) {

  				array[ i ] = listenerArray[ i ];

  			}

  			for ( i = 0; i < length; i ++ ) {

  				array[ i ].call( this, event );

  			}

  		}

  	}

  } );

  var MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2 };
  var CullFaceNone = 0;
  var CullFaceBack = 1;
  var CullFaceFront = 2;
  var CullFaceFrontBack = 3;
  var FrontFaceDirectionCW = 0;
  var FrontFaceDirectionCCW = 1;
  var BasicShadowMap = 0;
  var PCFShadowMap = 1;
  var PCFSoftShadowMap = 2;
  var FrontSide = 0;
  var BackSide = 1;
  var DoubleSide = 2;
  var FlatShading = 1;
  var SmoothShading = 2;
  var NoColors = 0;
  var FaceColors = 1;
  var VertexColors = 2;
  var NoBlending = 0;
  var NormalBlending = 1;
  var AdditiveBlending = 2;
  var SubtractiveBlending = 3;
  var MultiplyBlending = 4;
  var CustomBlending = 5;
  var AddEquation = 100;
  var SubtractEquation = 101;
  var ReverseSubtractEquation = 102;
  var MinEquation = 103;
  var MaxEquation = 104;
  var ZeroFactor = 200;
  var OneFactor = 201;
  var SrcColorFactor = 202;
  var OneMinusSrcColorFactor = 203;
  var SrcAlphaFactor = 204;
  var OneMinusSrcAlphaFactor = 205;
  var DstAlphaFactor = 206;
  var OneMinusDstAlphaFactor = 207;
  var DstColorFactor = 208;
  var OneMinusDstColorFactor = 209;
  var SrcAlphaSaturateFactor = 210;
  var NeverDepth = 0;
  var AlwaysDepth = 1;
  var LessDepth = 2;
  var LessEqualDepth = 3;
  var EqualDepth = 4;
  var GreaterEqualDepth = 5;
  var GreaterDepth = 6;
  var NotEqualDepth = 7;
  var MultiplyOperation = 0;
  var MixOperation = 1;
  var AddOperation = 2;
  var NoToneMapping = 0;
  var LinearToneMapping = 1;
  var ReinhardToneMapping = 2;
  var Uncharted2ToneMapping = 3;
  var CineonToneMapping = 4;
  var UVMapping = 300;
  var CubeReflectionMapping = 301;
  var CubeRefractionMapping = 302;
  var EquirectangularReflectionMapping = 303;
  var EquirectangularRefractionMapping = 304;
  var SphericalReflectionMapping = 305;
  var CubeUVReflectionMapping = 306;
  var CubeUVRefractionMapping = 307;
  var RepeatWrapping = 1000;
  var ClampToEdgeWrapping = 1001;
  var MirroredRepeatWrapping = 1002;
  var NearestFilter = 1003;
  var NearestMipMapNearestFilter = 1004;
  var NearestMipMapLinearFilter = 1005;
  var LinearFilter = 1006;
  var LinearMipMapNearestFilter = 1007;
  var LinearMipMapLinearFilter = 1008;
  var UnsignedByteType = 1009;
  var ByteType = 1010;
  var ShortType = 1011;
  var UnsignedShortType = 1012;
  var IntType = 1013;
  var UnsignedIntType = 1014;
  var FloatType = 1015;
  var HalfFloatType = 1025;
  var UnsignedShort4444Type = 1016;
  var UnsignedShort5551Type = 1017;
  var UnsignedShort565Type = 1018;
  var AlphaFormat = 1019;
  var RGBFormat = 1020;
  var RGBAFormat = 1021;
  var LuminanceFormat = 1022;
  var LuminanceAlphaFormat = 1023;
  var RGBEFormat = RGBAFormat;
  var DepthFormat = 1026;
  var RGB_S3TC_DXT1_Format = 2001;
  var RGBA_S3TC_DXT1_Format = 2002;
  var RGBA_S3TC_DXT3_Format = 2003;
  var RGBA_S3TC_DXT5_Format = 2004;
  var RGB_PVRTC_4BPPV1_Format = 2100;
  var RGB_PVRTC_2BPPV1_Format = 2101;
  var RGBA_PVRTC_4BPPV1_Format = 2102;
  var RGBA_PVRTC_2BPPV1_Format = 2103;
  var RGB_ETC1_Format = 2151;
  var LoopOnce = 2200;
  var LoopRepeat = 2201;
  var LoopPingPong = 2202;
  var InterpolateDiscrete = 2300;
  var InterpolateLinear = 2301;
  var InterpolateSmooth = 2302;
  var ZeroCurvatureEnding = 2400;
  var ZeroSlopeEnding = 2401;
  var WrapAroundEnding = 2402;
  var TrianglesDrawMode = 0;
  var TriangleStripDrawMode = 1;
  var TriangleFanDrawMode = 2;
  var LinearEncoding = 3000;
  var sRGBEncoding = 3001;
  var GammaEncoding = 3007;
  var RGBEEncoding = 3002;
  var LogLuvEncoding = 3003;
  var RGBM7Encoding = 3004;
  var RGBM16Encoding = 3005;
  var RGBDEncoding = 3006;
  var BasicDepthPacking = 3200;
  var RGBADepthPacking = 3201;

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   */

  exports.Math = {

  	DEG2RAD: Math.PI / 180,
  	RAD2DEG: 180 / Math.PI,

  	generateUUID: function () {

  		// http://www.broofa.com/Tools/Math.uuid.htm

  		var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split( '' );
  		var uuid = new Array( 36 );
  		var rnd = 0, r;

  		return function generateUUID() {

  			for ( var i = 0; i < 36; i ++ ) {

  				if ( i === 8 || i === 13 || i === 18 || i === 23 ) {

  					uuid[ i ] = '-';

  				} else if ( i === 14 ) {

  					uuid[ i ] = '4';

  				} else {

  					if ( rnd <= 0x02 ) rnd = 0x2000000 + ( Math.random() * 0x1000000 ) | 0;
  					r = rnd & 0xf;
  					rnd = rnd >> 4;
  					uuid[ i ] = chars[ ( i === 19 ) ? ( r & 0x3 ) | 0x8 : r ];

  				}

  			}

  			return uuid.join( '' );

  		};

  	}(),

  	clamp: function ( value, min, max ) {

  		return Math.max( min, Math.min( max, value ) );

  	},

  	// compute euclidian modulo of m % n
  	// https://en.wikipedia.org/wiki/Modulo_operation

  	euclideanModulo: function ( n, m ) {

  		return ( ( n % m ) + m ) % m;

  	},

  	// Linear mapping from range <a1, a2> to range <b1, b2>

  	mapLinear: function ( x, a1, a2, b1, b2 ) {

  		return b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );

  	},

  	// http://en.wikipedia.org/wiki/Smoothstep

  	smoothstep: function ( x, min, max ) {

  		if ( x <= min ) return 0;
  		if ( x >= max ) return 1;

  		x = ( x - min ) / ( max - min );

  		return x * x * ( 3 - 2 * x );

  	},

  	smootherstep: function ( x, min, max ) {

  		if ( x <= min ) return 0;
  		if ( x >= max ) return 1;

  		x = ( x - min ) / ( max - min );

  		return x * x * x * ( x * ( x * 6 - 15 ) + 10 );

  	},

  	random16: function () {

  		console.warn( 'THREE.Math.random16() has been deprecated. Use Math.random() instead.' );
  		return Math.random();

  	},

  	// Random integer from <low, high> interval

  	randInt: function ( low, high ) {

  		return low + Math.floor( Math.random() * ( high - low + 1 ) );

  	},

  	// Random float from <low, high> interval

  	randFloat: function ( low, high ) {

  		return low + Math.random() * ( high - low );

  	},

  	// Random float from <-range/2, range/2> interval

  	randFloatSpread: function ( range ) {

  		return range * ( 0.5 - Math.random() );

  	},

  	degToRad: function ( degrees ) {

  		return degrees * exports.Math.DEG2RAD;

  	},

  	radToDeg: function ( radians ) {

  		return radians * exports.Math.RAD2DEG;

  	},

  	isPowerOfTwo: function ( value ) {

  		return ( value & ( value - 1 ) ) === 0 && value !== 0;

  	},

  	nearestPowerOfTwo: function ( value ) {

  		return Math.pow( 2, Math.round( Math.log( value ) / Math.LN2 ) );

  	},

  	nextPowerOfTwo: function ( value ) {

  		value --;
  		value |= value >> 1;
  		value |= value >> 2;
  		value |= value >> 4;
  		value |= value >> 8;
  		value |= value >> 16;
  		value ++;

  		return value;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author philogb / http://blog.thejit.org/
   * @author egraether / http://egraether.com/
   * @author zz85 / http://www.lab4games.net/zz85/blog
   */

  function Vector2( x, y ) {

  	this.x = x || 0;
  	this.y = y || 0;

  };

  Vector2.prototype = {

  	constructor: Vector2,

  	isVector2: true,

  	get width() {

  		return this.x;

  	},

  	set width( value ) {

  		this.x = value;

  	},

  	get height() {

  		return this.y;

  	},

  	set height( value ) {

  		this.y = value;

  	},

  	//

  	set: function ( x, y ) {

  		this.x = x;
  		this.y = y;

  		return this;

  	},

  	setScalar: function ( scalar ) {

  		this.x = scalar;
  		this.y = scalar;

  		return this;

  	},

  	setX: function ( x ) {

  		this.x = x;

  		return this;

  	},

  	setY: function ( y ) {

  		this.y = y;

  		return this;

  	},

  	setComponent: function ( index, value ) {

  		switch ( index ) {

  			case 0: this.x = value; break;
  			case 1: this.y = value; break;
  			default: throw new Error( 'index is out of range: ' + index );

  		}

  	},

  	getComponent: function ( index ) {

  		switch ( index ) {

  			case 0: return this.x;
  			case 1: return this.y;
  			default: throw new Error( 'index is out of range: ' + index );

  		}

  	},

  	clone: function () {

  		return new this.constructor( this.x, this.y );

  	},

  	copy: function ( v ) {

  		this.x = v.x;
  		this.y = v.y;

  		return this;

  	},

  	add: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
  			return this.addVectors( v, w );

  		}

  		this.x += v.x;
  		this.y += v.y;

  		return this;

  	},

  	addScalar: function ( s ) {

  		this.x += s;
  		this.y += s;

  		return this;

  	},

  	addVectors: function ( a, b ) {

  		this.x = a.x + b.x;
  		this.y = a.y + b.y;

  		return this;

  	},

  	addScaledVector: function ( v, s ) {

  		this.x += v.x * s;
  		this.y += v.y * s;

  		return this;

  	},

  	sub: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
  			return this.subVectors( v, w );

  		}

  		this.x -= v.x;
  		this.y -= v.y;

  		return this;

  	},

  	subScalar: function ( s ) {

  		this.x -= s;
  		this.y -= s;

  		return this;

  	},

  	subVectors: function ( a, b ) {

  		this.x = a.x - b.x;
  		this.y = a.y - b.y;

  		return this;

  	},

  	multiply: function ( v ) {

  		this.x *= v.x;
  		this.y *= v.y;

  		return this;

  	},

  	multiplyScalar: function ( scalar ) {

  		if ( isFinite( scalar ) ) {

  			this.x *= scalar;
  			this.y *= scalar;

  		} else {

  			this.x = 0;
  			this.y = 0;

  		}

  		return this;

  	},

  	divide: function ( v ) {

  		this.x /= v.x;
  		this.y /= v.y;

  		return this;

  	},

  	divideScalar: function ( scalar ) {

  		return this.multiplyScalar( 1 / scalar );

  	},

  	min: function ( v ) {

  		this.x = Math.min( this.x, v.x );
  		this.y = Math.min( this.y, v.y );

  		return this;

  	},

  	max: function ( v ) {

  		this.x = Math.max( this.x, v.x );
  		this.y = Math.max( this.y, v.y );

  		return this;

  	},

  	clamp: function ( min, max ) {

  		// This function assumes min < max, if this assumption isn't true it will not operate correctly

  		this.x = Math.max( min.x, Math.min( max.x, this.x ) );
  		this.y = Math.max( min.y, Math.min( max.y, this.y ) );

  		return this;

  	},

  	clampScalar: function () {

  		var min, max;

  		return function clampScalar( minVal, maxVal ) {

  			if ( min === undefined ) {

  				min = new Vector2();
  				max = new Vector2();

  			}

  			min.set( minVal, minVal );
  			max.set( maxVal, maxVal );

  			return this.clamp( min, max );

  		};

  	}(),

  	clampLength: function ( min, max ) {

  		var length = this.length();

  		return this.multiplyScalar( Math.max( min, Math.min( max, length ) ) / length );

  	},

  	floor: function () {

  		this.x = Math.floor( this.x );
  		this.y = Math.floor( this.y );

  		return this;

  	},

  	ceil: function () {

  		this.x = Math.ceil( this.x );
  		this.y = Math.ceil( this.y );

  		return this;

  	},

  	round: function () {

  		this.x = Math.round( this.x );
  		this.y = Math.round( this.y );

  		return this;

  	},

  	roundToZero: function () {

  		this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
  		this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );

  		return this;

  	},

  	negate: function () {

  		this.x = - this.x;
  		this.y = - this.y;

  		return this;

  	},

  	dot: function ( v ) {

  		return this.x * v.x + this.y * v.y;

  	},

  	lengthSq: function () {

  		return this.x * this.x + this.y * this.y;

  	},

  	length: function () {

  		return Math.sqrt( this.x * this.x + this.y * this.y );

  	},

  	lengthManhattan: function() {

  		return Math.abs( this.x ) + Math.abs( this.y );

  	},

  	normalize: function () {

  		return this.divideScalar( this.length() );

  	},

  	angle: function () {

  		// computes the angle in radians with respect to the positive x-axis

  		var angle = Math.atan2( this.y, this.x );

  		if ( angle < 0 ) angle += 2 * Math.PI;

  		return angle;

  	},

  	distanceTo: function ( v ) {

  		return Math.sqrt( this.distanceToSquared( v ) );

  	},

  	distanceToSquared: function ( v ) {

  		var dx = this.x - v.x, dy = this.y - v.y;
  		return dx * dx + dy * dy;

  	},

  	distanceToManhattan: function ( v ) {

  		return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );

  	},

  	setLength: function ( length ) {

  		return this.multiplyScalar( length / this.length() );

  	},

  	lerp: function ( v, alpha ) {

  		this.x += ( v.x - this.x ) * alpha;
  		this.y += ( v.y - this.y ) * alpha;

  		return this;

  	},

  	lerpVectors: function ( v1, v2, alpha ) {

  		return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );

  	},

  	equals: function ( v ) {

  		return ( ( v.x === this.x ) && ( v.y === this.y ) );

  	},

  	fromArray: function ( array, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this.x = array[ offset ];
  		this.y = array[ offset + 1 ];

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		array[ offset ] = this.x;
  		array[ offset + 1 ] = this.y;

  		return array;

  	},

  	fromAttribute: function ( attribute, index, offset ) {

  		if ( offset === undefined ) offset = 0;

  		index = index * attribute.itemSize + offset;

  		this.x = attribute.array[ index ];
  		this.y = attribute.array[ index + 1 ];

  		return this;

  	},

  	rotateAround: function ( center, angle ) {

  		var c = Math.cos( angle ), s = Math.sin( angle );

  		var x = this.x - center.x;
  		var y = this.y - center.y;

  		this.x = x * c - y * s + center.x;
  		this.y = x * s + y * c + center.y;

  		return this;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   * @author szimek / https://github.com/szimek/
   */

  function Texture( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {

  	Object.defineProperty( this, 'id', { value: TextureIdCount() } );

  	this.uuid = exports.Math.generateUUID();

  	this.name = '';
  	this.sourceFile = '';

  	this.image = image !== undefined ? image : Texture.DEFAULT_IMAGE;
  	this.mipmaps = [];

  	this.mapping = mapping !== undefined ? mapping : Texture.DEFAULT_MAPPING;

  	this.wrapS = wrapS !== undefined ? wrapS : ClampToEdgeWrapping;
  	this.wrapT = wrapT !== undefined ? wrapT : ClampToEdgeWrapping;

  	this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;
  	this.minFilter = minFilter !== undefined ? minFilter : LinearMipMapLinearFilter;

  	this.anisotropy = anisotropy !== undefined ? anisotropy : 1;

  	this.format = format !== undefined ? format : RGBAFormat;
  	this.type = type !== undefined ? type : UnsignedByteType;

  	this.offset = new Vector2( 0, 0 );
  	this.repeat = new Vector2( 1, 1 );

  	this.generateMipmaps = true;
  	this.premultiplyAlpha = false;
  	this.flipY = true;
  	this.unpackAlignment = 4;	// valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)


  	// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.
  	//
  	// Also changing the encoding after already used by a Material will not automatically make the Material
  	// update.  You need to explicitly call Material.needsUpdate to trigger it to recompile.
  	this.encoding = encoding !== undefined ? encoding :  LinearEncoding;

  	this.version = 0;
  	this.onUpdate = null;

  };

  Texture.DEFAULT_IMAGE = undefined;
  Texture.DEFAULT_MAPPING = UVMapping;

  Texture.prototype = {

  	constructor: Texture,

  	isTexture: true,

  	set needsUpdate( value ) {

  		if ( value === true ) this.version ++;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( source ) {

  		this.image = source.image;
  		this.mipmaps = source.mipmaps.slice( 0 );

  		this.mapping = source.mapping;

  		this.wrapS = source.wrapS;
  		this.wrapT = source.wrapT;

  		this.magFilter = source.magFilter;
  		this.minFilter = source.minFilter;

  		this.anisotropy = source.anisotropy;

  		this.format = source.format;
  		this.type = source.type;

  		this.offset.copy( source.offset );
  		this.repeat.copy( source.repeat );

  		this.generateMipmaps = source.generateMipmaps;
  		this.premultiplyAlpha = source.premultiplyAlpha;
  		this.flipY = source.flipY;
  		this.unpackAlignment = source.unpackAlignment;
  		this.encoding = source.encoding;

  		return this;

  	},

  	toJSON: function ( meta ) {

  		if ( meta.textures[ this.uuid ] !== undefined ) {

  			return meta.textures[ this.uuid ];

  		}

  		function getDataURL( image ) {

  			var canvas;

  			if ( image.toDataURL !== undefined ) {

  				canvas = image;

  			} else {

  				canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
  				canvas.width = image.width;
  				canvas.height = image.height;

  				canvas.getContext( '2d' ).drawImage( image, 0, 0, image.width, image.height );

  			}

  			if ( canvas.width > 2048 || canvas.height > 2048 ) {

  				return canvas.toDataURL( 'image/jpeg', 0.6 );

  			} else {

  				return canvas.toDataURL( 'image/png' );

  			}

  		}

  		var output = {
  			metadata: {
  				version: 4.4,
  				type: 'Texture',
  				generator: 'Texture.toJSON'
  			},

  			uuid: this.uuid,
  			name: this.name,

  			mapping: this.mapping,

  			repeat: [ this.repeat.x, this.repeat.y ],
  			offset: [ this.offset.x, this.offset.y ],
  			wrap: [ this.wrapS, this.wrapT ],

  			minFilter: this.minFilter,
  			magFilter: this.magFilter,
  			anisotropy: this.anisotropy,

  			flipY: this.flipY
  		};

  		if ( this.image !== undefined ) {

  			// TODO: Move to THREE.Image

  			var image = this.image;

  			if ( image.uuid === undefined ) {

  				image.uuid = exports.Math.generateUUID(); // UGH

  			}

  			if ( meta.images[ image.uuid ] === undefined ) {

  				meta.images[ image.uuid ] = {
  					uuid: image.uuid,
  					url: getDataURL( image )
  				};

  			}

  			output.image = image.uuid;

  		}

  		meta.textures[ this.uuid ] = output;

  		return output;

  	},

  	dispose: function () {

  		this.dispatchEvent( { type: 'dispose' } );

  	},

  	transformUv: function ( uv ) {

  		if ( this.mapping !== UVMapping )  return;

  		uv.multiply( this.repeat );
  		uv.add( this.offset );

  		if ( uv.x < 0 || uv.x > 1 ) {

  			switch ( this.wrapS ) {

  				case RepeatWrapping:

  					uv.x = uv.x - Math.floor( uv.x );
  					break;

  				case ClampToEdgeWrapping:

  					uv.x = uv.x < 0 ? 0 : 1;
  					break;

  				case MirroredRepeatWrapping:

  					if ( Math.abs( Math.floor( uv.x ) % 2 ) === 1 ) {

  						uv.x = Math.ceil( uv.x ) - uv.x;

  					} else {

  						uv.x = uv.x - Math.floor( uv.x );

  					}
  					break;

  			}

  		}

  		if ( uv.y < 0 || uv.y > 1 ) {

  			switch ( this.wrapT ) {

  				case RepeatWrapping:

  					uv.y = uv.y - Math.floor( uv.y );
  					break;

  				case ClampToEdgeWrapping:

  					uv.y = uv.y < 0 ? 0 : 1;
  					break;

  				case MirroredRepeatWrapping:

  					if ( Math.abs( Math.floor( uv.y ) % 2 ) === 1 ) {

  						uv.y = Math.ceil( uv.y ) - uv.y;

  					} else {

  						uv.y = uv.y - Math.floor( uv.y );

  					}
  					break;

  			}

  		}

  		if ( this.flipY ) {

  			uv.y = 1 - uv.y;

  		}

  	}

  };

  Object.assign( Texture.prototype, EventDispatcher.prototype );

  var count = 0;
  function TextureIdCount() { return count++; };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author supereggbert / http://www.paulbrunt.co.uk/
   * @author philogb / http://blog.thejit.org/
   * @author jordi_ros / http://plattsoft.com
   * @author D1plo1d / http://github.com/D1plo1d
   * @author alteredq / http://alteredqualia.com/
   * @author mikael emtinger / http://gomo.se/
   * @author timknip / http://www.floorplanner.com/
   * @author bhouston / http://clara.io
   * @author WestLangley / http://github.com/WestLangley
   */

  function Matrix4() {

  	this.elements = new Float32Array( [

  		1, 0, 0, 0,
  		0, 1, 0, 0,
  		0, 0, 1, 0,
  		0, 0, 0, 1

  	] );

  	if ( arguments.length > 0 ) {

  		console.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );

  	}

  };

  Matrix4.prototype = {

  	constructor: Matrix4,

  	isMatrix4: true,

  	set: function ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {

  		var te = this.elements;

  		te[ 0 ] = n11; te[ 4 ] = n12; te[ 8 ] = n13; te[ 12 ] = n14;
  		te[ 1 ] = n21; te[ 5 ] = n22; te[ 9 ] = n23; te[ 13 ] = n24;
  		te[ 2 ] = n31; te[ 6 ] = n32; te[ 10 ] = n33; te[ 14 ] = n34;
  		te[ 3 ] = n41; te[ 7 ] = n42; te[ 11 ] = n43; te[ 15 ] = n44;

  		return this;

  	},

  	identity: function () {

  		this.set(

  			1, 0, 0, 0,
  			0, 1, 0, 0,
  			0, 0, 1, 0,
  			0, 0, 0, 1

  		);

  		return this;

  	},

  	clone: function () {

  		return new Matrix4().fromArray( this.elements );

  	},

  	copy: function ( m ) {

  		this.elements.set( m.elements );

  		return this;

  	},

  	copyPosition: function ( m ) {

  		var te = this.elements;
  		var me = m.elements;

  		te[ 12 ] = me[ 12 ];
  		te[ 13 ] = me[ 13 ];
  		te[ 14 ] = me[ 14 ];

  		return this;

  	},

  	extractBasis: function ( xAxis, yAxis, zAxis ) {

  		xAxis.setFromMatrixColumn( this, 0 );
  		yAxis.setFromMatrixColumn( this, 1 );
  		zAxis.setFromMatrixColumn( this, 2 );

  		return this;

  	},

  	makeBasis: function ( xAxis, yAxis, zAxis ) {

  		this.set(
  			xAxis.x, yAxis.x, zAxis.x, 0,
  			xAxis.y, yAxis.y, zAxis.y, 0,
  			xAxis.z, yAxis.z, zAxis.z, 0,
  			0,       0,       0,       1
  		);

  		return this;

  	},

  	extractRotation: function () {

  		var v1;

  		return function extractRotation( m ) {

  			if ( v1 === undefined ) v1 = new Vector3();

  			var te = this.elements;
  			var me = m.elements;

  			var scaleX = 1 / v1.setFromMatrixColumn( m, 0 ).length();
  			var scaleY = 1 / v1.setFromMatrixColumn( m, 1 ).length();
  			var scaleZ = 1 / v1.setFromMatrixColumn( m, 2 ).length();

  			te[ 0 ] = me[ 0 ] * scaleX;
  			te[ 1 ] = me[ 1 ] * scaleX;
  			te[ 2 ] = me[ 2 ] * scaleX;

  			te[ 4 ] = me[ 4 ] * scaleY;
  			te[ 5 ] = me[ 5 ] * scaleY;
  			te[ 6 ] = me[ 6 ] * scaleY;

  			te[ 8 ] = me[ 8 ] * scaleZ;
  			te[ 9 ] = me[ 9 ] * scaleZ;
  			te[ 10 ] = me[ 10 ] * scaleZ;

  			return this;

  		};

  	}(),

  	makeRotationFromEuler: function ( euler ) {

  		if ( (euler && euler.isEuler) === false ) {

  			console.error( 'THREE.Matrix: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );

  		}

  		var te = this.elements;

  		var x = euler.x, y = euler.y, z = euler.z;
  		var a = Math.cos( x ), b = Math.sin( x );
  		var c = Math.cos( y ), d = Math.sin( y );
  		var e = Math.cos( z ), f = Math.sin( z );

  		if ( euler.order === 'XYZ' ) {

  			var ae = a * e, af = a * f, be = b * e, bf = b * f;

  			te[ 0 ] = c * e;
  			te[ 4 ] = - c * f;
  			te[ 8 ] = d;

  			te[ 1 ] = af + be * d;
  			te[ 5 ] = ae - bf * d;
  			te[ 9 ] = - b * c;

  			te[ 2 ] = bf - ae * d;
  			te[ 6 ] = be + af * d;
  			te[ 10 ] = a * c;

  		} else if ( euler.order === 'YXZ' ) {

  			var ce = c * e, cf = c * f, de = d * e, df = d * f;

  			te[ 0 ] = ce + df * b;
  			te[ 4 ] = de * b - cf;
  			te[ 8 ] = a * d;

  			te[ 1 ] = a * f;
  			te[ 5 ] = a * e;
  			te[ 9 ] = - b;

  			te[ 2 ] = cf * b - de;
  			te[ 6 ] = df + ce * b;
  			te[ 10 ] = a * c;

  		} else if ( euler.order === 'ZXY' ) {

  			var ce = c * e, cf = c * f, de = d * e, df = d * f;

  			te[ 0 ] = ce - df * b;
  			te[ 4 ] = - a * f;
  			te[ 8 ] = de + cf * b;

  			te[ 1 ] = cf + de * b;
  			te[ 5 ] = a * e;
  			te[ 9 ] = df - ce * b;

  			te[ 2 ] = - a * d;
  			te[ 6 ] = b;
  			te[ 10 ] = a * c;

  		} else if ( euler.order === 'ZYX' ) {

  			var ae = a * e, af = a * f, be = b * e, bf = b * f;

  			te[ 0 ] = c * e;
  			te[ 4 ] = be * d - af;
  			te[ 8 ] = ae * d + bf;

  			te[ 1 ] = c * f;
  			te[ 5 ] = bf * d + ae;
  			te[ 9 ] = af * d - be;

  			te[ 2 ] = - d;
  			te[ 6 ] = b * c;
  			te[ 10 ] = a * c;

  		} else if ( euler.order === 'YZX' ) {

  			var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

  			te[ 0 ] = c * e;
  			te[ 4 ] = bd - ac * f;
  			te[ 8 ] = bc * f + ad;

  			te[ 1 ] = f;
  			te[ 5 ] = a * e;
  			te[ 9 ] = - b * e;

  			te[ 2 ] = - d * e;
  			te[ 6 ] = ad * f + bc;
  			te[ 10 ] = ac - bd * f;

  		} else if ( euler.order === 'XZY' ) {

  			var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

  			te[ 0 ] = c * e;
  			te[ 4 ] = - f;
  			te[ 8 ] = d * e;

  			te[ 1 ] = ac * f + bd;
  			te[ 5 ] = a * e;
  			te[ 9 ] = ad * f - bc;

  			te[ 2 ] = bc * f - ad;
  			te[ 6 ] = b * e;
  			te[ 10 ] = bd * f + ac;

  		}

  		// last column
  		te[ 3 ] = 0;
  		te[ 7 ] = 0;
  		te[ 11 ] = 0;

  		// bottom row
  		te[ 12 ] = 0;
  		te[ 13 ] = 0;
  		te[ 14 ] = 0;
  		te[ 15 ] = 1;

  		return this;

  	},

  	makeRotationFromQuaternion: function ( q ) {

  		var te = this.elements;

  		var x = q.x, y = q.y, z = q.z, w = q.w;
  		var x2 = x + x, y2 = y + y, z2 = z + z;
  		var xx = x * x2, xy = x * y2, xz = x * z2;
  		var yy = y * y2, yz = y * z2, zz = z * z2;
  		var wx = w * x2, wy = w * y2, wz = w * z2;

  		te[ 0 ] = 1 - ( yy + zz );
  		te[ 4 ] = xy - wz;
  		te[ 8 ] = xz + wy;

  		te[ 1 ] = xy + wz;
  		te[ 5 ] = 1 - ( xx + zz );
  		te[ 9 ] = yz - wx;

  		te[ 2 ] = xz - wy;
  		te[ 6 ] = yz + wx;
  		te[ 10 ] = 1 - ( xx + yy );

  		// last column
  		te[ 3 ] = 0;
  		te[ 7 ] = 0;
  		te[ 11 ] = 0;

  		// bottom row
  		te[ 12 ] = 0;
  		te[ 13 ] = 0;
  		te[ 14 ] = 0;
  		te[ 15 ] = 1;

  		return this;

  	},

  	lookAt: function () {

  		var x, y, z;

  		return function lookAt( eye, target, up ) {

  			if ( x === undefined ) {

  				x = new Vector3();
  				y = new Vector3();
  				z = new Vector3();

  			}

  			var te = this.elements;

  			z.subVectors( eye, target ).normalize();

  			if ( z.lengthSq() === 0 ) {

  				z.z = 1;

  			}

  			x.crossVectors( up, z ).normalize();

  			if ( x.lengthSq() === 0 ) {

  				z.z += 0.0001;
  				x.crossVectors( up, z ).normalize();

  			}

  			y.crossVectors( z, x );


  			te[ 0 ] = x.x; te[ 4 ] = y.x; te[ 8 ] = z.x;
  			te[ 1 ] = x.y; te[ 5 ] = y.y; te[ 9 ] = z.y;
  			te[ 2 ] = x.z; te[ 6 ] = y.z; te[ 10 ] = z.z;

  			return this;

  		};

  	}(),

  	multiply: function ( m, n ) {

  		if ( n !== undefined ) {

  			console.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );
  			return this.multiplyMatrices( m, n );

  		}

  		return this.multiplyMatrices( this, m );

  	},

  	premultiply: function ( m ) {

  		return this.multiplyMatrices( m, this );

  	},

  	multiplyMatrices: function ( a, b ) {

  		var ae = a.elements;
  		var be = b.elements;
  		var te = this.elements;

  		var a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];
  		var a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];
  		var a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];
  		var a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];

  		var b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];
  		var b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];
  		var b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];
  		var b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];

  		te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
  		te[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
  		te[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
  		te[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;

  		te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
  		te[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
  		te[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
  		te[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;

  		te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
  		te[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
  		te[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
  		te[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;

  		te[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
  		te[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
  		te[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
  		te[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;

  		return this;

  	},

  	multiplyToArray: function ( a, b, r ) {

  		var te = this.elements;

  		this.multiplyMatrices( a, b );

  		r[ 0 ] = te[ 0 ]; r[ 1 ] = te[ 1 ]; r[ 2 ] = te[ 2 ]; r[ 3 ] = te[ 3 ];
  		r[ 4 ] = te[ 4 ]; r[ 5 ] = te[ 5 ]; r[ 6 ] = te[ 6 ]; r[ 7 ] = te[ 7 ];
  		r[ 8 ]  = te[ 8 ]; r[ 9 ]  = te[ 9 ]; r[ 10 ] = te[ 10 ]; r[ 11 ] = te[ 11 ];
  		r[ 12 ] = te[ 12 ]; r[ 13 ] = te[ 13 ]; r[ 14 ] = te[ 14 ]; r[ 15 ] = te[ 15 ];

  		return this;

  	},

  	multiplyScalar: function ( s ) {

  		var te = this.elements;

  		te[ 0 ] *= s; te[ 4 ] *= s; te[ 8 ] *= s; te[ 12 ] *= s;
  		te[ 1 ] *= s; te[ 5 ] *= s; te[ 9 ] *= s; te[ 13 ] *= s;
  		te[ 2 ] *= s; te[ 6 ] *= s; te[ 10 ] *= s; te[ 14 ] *= s;
  		te[ 3 ] *= s; te[ 7 ] *= s; te[ 11 ] *= s; te[ 15 ] *= s;

  		return this;

  	},

  	applyToVector3Array: function () {

  		var v1;

  		return function applyToVector3Array( array, offset, length ) {

  			if ( v1 === undefined ) v1 = new Vector3();
  			if ( offset === undefined ) offset = 0;
  			if ( length === undefined ) length = array.length;

  			for ( var i = 0, j = offset; i < length; i += 3, j += 3 ) {

  				v1.fromArray( array, j );
  				v1.applyMatrix4( this );
  				v1.toArray( array, j );

  			}

  			return array;

  		};

  	}(),

  	applyToBuffer: function () {

  		var v1;

  		return function applyToBuffer( buffer, offset, length ) {

  			if ( v1 === undefined ) v1 = new Vector3();
  			if ( offset === undefined ) offset = 0;
  			if ( length === undefined ) length = buffer.length / buffer.itemSize;

  			for ( var i = 0, j = offset; i < length; i ++, j ++ ) {

  				v1.x = buffer.getX( j );
  				v1.y = buffer.getY( j );
  				v1.z = buffer.getZ( j );

  				v1.applyMatrix4( this );

  				buffer.setXYZ( v1.x, v1.y, v1.z );

  			}

  			return buffer;

  		};

  	}(),

  	determinant: function () {

  		var te = this.elements;

  		var n11 = te[ 0 ], n12 = te[ 4 ], n13 = te[ 8 ], n14 = te[ 12 ];
  		var n21 = te[ 1 ], n22 = te[ 5 ], n23 = te[ 9 ], n24 = te[ 13 ];
  		var n31 = te[ 2 ], n32 = te[ 6 ], n33 = te[ 10 ], n34 = te[ 14 ];
  		var n41 = te[ 3 ], n42 = te[ 7 ], n43 = te[ 11 ], n44 = te[ 15 ];

  		//TODO: make this more efficient
  		//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )

  		return (
  			n41 * (
  				+ n14 * n23 * n32
  				 - n13 * n24 * n32
  				 - n14 * n22 * n33
  				 + n12 * n24 * n33
  				 + n13 * n22 * n34
  				 - n12 * n23 * n34
  			) +
  			n42 * (
  				+ n11 * n23 * n34
  				 - n11 * n24 * n33
  				 + n14 * n21 * n33
  				 - n13 * n21 * n34
  				 + n13 * n24 * n31
  				 - n14 * n23 * n31
  			) +
  			n43 * (
  				+ n11 * n24 * n32
  				 - n11 * n22 * n34
  				 - n14 * n21 * n32
  				 + n12 * n21 * n34
  				 + n14 * n22 * n31
  				 - n12 * n24 * n31
  			) +
  			n44 * (
  				- n13 * n22 * n31
  				 - n11 * n23 * n32
  				 + n11 * n22 * n33
  				 + n13 * n21 * n32
  				 - n12 * n21 * n33
  				 + n12 * n23 * n31
  			)

  		);

  	},

  	transpose: function () {

  		var te = this.elements;
  		var tmp;

  		tmp = te[ 1 ]; te[ 1 ] = te[ 4 ]; te[ 4 ] = tmp;
  		tmp = te[ 2 ]; te[ 2 ] = te[ 8 ]; te[ 8 ] = tmp;
  		tmp = te[ 6 ]; te[ 6 ] = te[ 9 ]; te[ 9 ] = tmp;

  		tmp = te[ 3 ]; te[ 3 ] = te[ 12 ]; te[ 12 ] = tmp;
  		tmp = te[ 7 ]; te[ 7 ] = te[ 13 ]; te[ 13 ] = tmp;
  		tmp = te[ 11 ]; te[ 11 ] = te[ 14 ]; te[ 14 ] = tmp;

  		return this;

  	},

  	flattenToArrayOffset: function ( array, offset ) {

  		console.warn( "THREE.Matrix3: .flattenToArrayOffset is deprecated " +
  				"- just use .toArray instead." );

  		return this.toArray( array, offset );

  	},

  	getPosition: function () {

  		var v1;

  		return function getPosition() {

  			if ( v1 === undefined ) v1 = new Vector3();
  			console.warn( 'THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.' );

  			return v1.setFromMatrixColumn( this, 3 );

  		};

  	}(),

  	setPosition: function ( v ) {

  		var te = this.elements;

  		te[ 12 ] = v.x;
  		te[ 13 ] = v.y;
  		te[ 14 ] = v.z;

  		return this;

  	},

  	getInverse: function ( m, throwOnDegenerate ) {

  		// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
  		var te = this.elements,
  			me = m.elements,

  			n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ], n41 = me[ 3 ],
  			n12 = me[ 4 ], n22 = me[ 5 ], n32 = me[ 6 ], n42 = me[ 7 ],
  			n13 = me[ 8 ], n23 = me[ 9 ], n33 = me[ 10 ], n43 = me[ 11 ],
  			n14 = me[ 12 ], n24 = me[ 13 ], n34 = me[ 14 ], n44 = me[ 15 ],

  			t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,
  			t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,
  			t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,
  			t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;

  		var det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;

  		if ( det === 0 ) {

  			var msg = "THREE.Matrix4.getInverse(): can't invert matrix, determinant is 0";

  			if ( throwOnDegenerate || false ) {} else {

  				console.warn( msg );

  			}

  			return this.identity();

  		}

  		var detInv = 1 / det;

  		te[ 0 ] = t11 * detInv;
  		te[ 1 ] = ( n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44 ) * detInv;
  		te[ 2 ] = ( n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44 ) * detInv;
  		te[ 3 ] = ( n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43 ) * detInv;

  		te[ 4 ] = t12 * detInv;
  		te[ 5 ] = ( n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44 ) * detInv;
  		te[ 6 ] = ( n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44 ) * detInv;
  		te[ 7 ] = ( n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43 ) * detInv;

  		te[ 8 ] = t13 * detInv;
  		te[ 9 ] = ( n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44 ) * detInv;
  		te[ 10 ] = ( n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44 ) * detInv;
  		te[ 11 ] = ( n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43 ) * detInv;

  		te[ 12 ] = t14 * detInv;
  		te[ 13 ] = ( n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34 ) * detInv;
  		te[ 14 ] = ( n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34 ) * detInv;
  		te[ 15 ] = ( n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33 ) * detInv;

  		return this;

  	},

  	scale: function ( v ) {

  		var te = this.elements;
  		var x = v.x, y = v.y, z = v.z;

  		te[ 0 ] *= x; te[ 4 ] *= y; te[ 8 ] *= z;
  		te[ 1 ] *= x; te[ 5 ] *= y; te[ 9 ] *= z;
  		te[ 2 ] *= x; te[ 6 ] *= y; te[ 10 ] *= z;
  		te[ 3 ] *= x; te[ 7 ] *= y; te[ 11 ] *= z;

  		return this;

  	},

  	getMaxScaleOnAxis: function () {

  		var te = this.elements;

  		var scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];
  		var scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];
  		var scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];

  		return Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );

  	},

  	makeTranslation: function ( x, y, z ) {

  		this.set(

  			1, 0, 0, x,
  			0, 1, 0, y,
  			0, 0, 1, z,
  			0, 0, 0, 1

  		);

  		return this;

  	},

  	makeRotationX: function ( theta ) {

  		var c = Math.cos( theta ), s = Math.sin( theta );

  		this.set(

  			1, 0,  0, 0,
  			0, c, - s, 0,
  			0, s,  c, 0,
  			0, 0,  0, 1

  		);

  		return this;

  	},

  	makeRotationY: function ( theta ) {

  		var c = Math.cos( theta ), s = Math.sin( theta );

  		this.set(

  			 c, 0, s, 0,
  			 0, 1, 0, 0,
  			- s, 0, c, 0,
  			 0, 0, 0, 1

  		);

  		return this;

  	},

  	makeRotationZ: function ( theta ) {

  		var c = Math.cos( theta ), s = Math.sin( theta );

  		this.set(

  			c, - s, 0, 0,
  			s,  c, 0, 0,
  			0,  0, 1, 0,
  			0,  0, 0, 1

  		);

  		return this;

  	},

  	makeRotationAxis: function ( axis, angle ) {

  		// Based on http://www.gamedev.net/reference/articles/article1199.asp

  		var c = Math.cos( angle );
  		var s = Math.sin( angle );
  		var t = 1 - c;
  		var x = axis.x, y = axis.y, z = axis.z;
  		var tx = t * x, ty = t * y;

  		this.set(

  			tx * x + c, tx * y - s * z, tx * z + s * y, 0,
  			tx * y + s * z, ty * y + c, ty * z - s * x, 0,
  			tx * z - s * y, ty * z + s * x, t * z * z + c, 0,
  			0, 0, 0, 1

  		);

  		 return this;

  	},

  	makeScale: function ( x, y, z ) {

  		this.set(

  			x, 0, 0, 0,
  			0, y, 0, 0,
  			0, 0, z, 0,
  			0, 0, 0, 1

  		);

  		return this;

  	},

  	compose: function ( position, quaternion, scale ) {

  		this.makeRotationFromQuaternion( quaternion );
  		this.scale( scale );
  		this.setPosition( position );

  		return this;

  	},

  	decompose: function () {

  		var vector, matrix;

  		return function decompose( position, quaternion, scale ) {

  			if ( vector === undefined ) {

  				vector = new Vector3();
  				matrix = new Matrix4();

  			}

  			var te = this.elements;

  			var sx = vector.set( te[ 0 ], te[ 1 ], te[ 2 ] ).length();
  			var sy = vector.set( te[ 4 ], te[ 5 ], te[ 6 ] ).length();
  			var sz = vector.set( te[ 8 ], te[ 9 ], te[ 10 ] ).length();

  			// if determine is negative, we need to invert one scale
  			var det = this.determinant();
  			if ( det < 0 ) {

  				sx = - sx;

  			}

  			position.x = te[ 12 ];
  			position.y = te[ 13 ];
  			position.z = te[ 14 ];

  			// scale the rotation part

  			matrix.elements.set( this.elements ); // at this point matrix is incomplete so we can't use .copy()

  			var invSX = 1 / sx;
  			var invSY = 1 / sy;
  			var invSZ = 1 / sz;

  			matrix.elements[ 0 ] *= invSX;
  			matrix.elements[ 1 ] *= invSX;
  			matrix.elements[ 2 ] *= invSX;

  			matrix.elements[ 4 ] *= invSY;
  			matrix.elements[ 5 ] *= invSY;
  			matrix.elements[ 6 ] *= invSY;

  			matrix.elements[ 8 ] *= invSZ;
  			matrix.elements[ 9 ] *= invSZ;
  			matrix.elements[ 10 ] *= invSZ;

  			quaternion.setFromRotationMatrix( matrix );

  			scale.x = sx;
  			scale.y = sy;
  			scale.z = sz;

  			return this;

  		};

  	}(),

  	makeFrustum: function ( left, right, bottom, top, near, far ) {

  		var te = this.elements;
  		var x = 2 * near / ( right - left );
  		var y = 2 * near / ( top - bottom );

  		var a = ( right + left ) / ( right - left );
  		var b = ( top + bottom ) / ( top - bottom );
  		var c = - ( far + near ) / ( far - near );
  		var d = - 2 * far * near / ( far - near );

  		te[ 0 ] = x;	te[ 4 ] = 0;	te[ 8 ] = a;	te[ 12 ] = 0;
  		te[ 1 ] = 0;	te[ 5 ] = y;	te[ 9 ] = b;	te[ 13 ] = 0;
  		te[ 2 ] = 0;	te[ 6 ] = 0;	te[ 10 ] = c;	te[ 14 ] = d;
  		te[ 3 ] = 0;	te[ 7 ] = 0;	te[ 11 ] = - 1;	te[ 15 ] = 0;

  		return this;

  	},

  	makePerspective: function ( fov, aspect, near, far ) {

  		var ymax = near * Math.tan( exports.Math.DEG2RAD * fov * 0.5 );
  		var ymin = - ymax;
  		var xmin = ymin * aspect;
  		var xmax = ymax * aspect;

  		return this.makeFrustum( xmin, xmax, ymin, ymax, near, far );

  	},

  	makeOrthographic: function ( left, right, top, bottom, near, far ) {

  		var te = this.elements;
  		var w = 1.0 / ( right - left );
  		var h = 1.0 / ( top - bottom );
  		var p = 1.0 / ( far - near );

  		var x = ( right + left ) * w;
  		var y = ( top + bottom ) * h;
  		var z = ( far + near ) * p;

  		te[ 0 ] = 2 * w;	te[ 4 ] = 0;	te[ 8 ] = 0;	te[ 12 ] = - x;
  		te[ 1 ] = 0;	te[ 5 ] = 2 * h;	te[ 9 ] = 0;	te[ 13 ] = - y;
  		te[ 2 ] = 0;	te[ 6 ] = 0;	te[ 10 ] = - 2 * p;	te[ 14 ] = - z;
  		te[ 3 ] = 0;	te[ 7 ] = 0;	te[ 11 ] = 0;	te[ 15 ] = 1;

  		return this;

  	},

  	equals: function ( matrix ) {

  		var te = this.elements;
  		var me = matrix.elements;

  		for ( var i = 0; i < 16; i ++ ) {

  			if ( te[ i ] !== me[ i ] ) return false;

  		}

  		return true;

  	},

  	fromArray: function ( array ) {

  		this.elements.set( array );

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		var te = this.elements;

  		array[ offset ] = te[ 0 ];
  		array[ offset + 1 ] = te[ 1 ];
  		array[ offset + 2 ] = te[ 2 ];
  		array[ offset + 3 ] = te[ 3 ];

  		array[ offset + 4 ] = te[ 4 ];
  		array[ offset + 5 ] = te[ 5 ];
  		array[ offset + 6 ] = te[ 6 ];
  		array[ offset + 7 ] = te[ 7 ];

  		array[ offset + 8 ]  = te[ 8 ];
  		array[ offset + 9 ]  = te[ 9 ];
  		array[ offset + 10 ] = te[ 10 ];
  		array[ offset + 11 ] = te[ 11 ];

  		array[ offset + 12 ] = te[ 12 ];
  		array[ offset + 13 ] = te[ 13 ];
  		array[ offset + 14 ] = te[ 14 ];
  		array[ offset + 15 ] = te[ 15 ];

  		return array;

  	}

  };

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   * @author WestLangley / http://github.com/WestLangley
   * @author bhouston / http://clara.io
   */

  function Quaternion( x, y, z, w ) {

  	this._x = x || 0;
  	this._y = y || 0;
  	this._z = z || 0;
  	this._w = ( w !== undefined ) ? w : 1;

  };

  Quaternion.prototype = {

  	constructor: Quaternion,

  	get x () {

  		return this._x;

  	},

  	set x ( value ) {

  		this._x = value;
  		this.onChangeCallback();

  	},

  	get y () {

  		return this._y;

  	},

  	set y ( value ) {

  		this._y = value;
  		this.onChangeCallback();

  	},

  	get z () {

  		return this._z;

  	},

  	set z ( value ) {

  		this._z = value;
  		this.onChangeCallback();

  	},

  	get w () {

  		return this._w;

  	},

  	set w ( value ) {

  		this._w = value;
  		this.onChangeCallback();

  	},

  	set: function ( x, y, z, w ) {

  		this._x = x;
  		this._y = y;
  		this._z = z;
  		this._w = w;

  		this.onChangeCallback();

  		return this;

  	},

  	clone: function () {

  		return new this.constructor( this._x, this._y, this._z, this._w );

  	},

  	copy: function ( quaternion ) {

  		this._x = quaternion.x;
  		this._y = quaternion.y;
  		this._z = quaternion.z;
  		this._w = quaternion.w;

  		this.onChangeCallback();

  		return this;

  	},

  	setFromEuler: function ( euler, update ) {

  		if ( (euler && euler.isEuler) === false ) {

  			throw new Error( 'THREE.Quaternion: .setFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );

  		}

  		// http://www.mathworks.com/matlabcentral/fileexchange/
  		// 	20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
  		//	content/SpinCalc.m

  		var c1 = Math.cos( euler._x / 2 );
  		var c2 = Math.cos( euler._y / 2 );
  		var c3 = Math.cos( euler._z / 2 );
  		var s1 = Math.sin( euler._x / 2 );
  		var s2 = Math.sin( euler._y / 2 );
  		var s3 = Math.sin( euler._z / 2 );

  		var order = euler.order;

  		if ( order === 'XYZ' ) {

  			this._x = s1 * c2 * c3 + c1 * s2 * s3;
  			this._y = c1 * s2 * c3 - s1 * c2 * s3;
  			this._z = c1 * c2 * s3 + s1 * s2 * c3;
  			this._w = c1 * c2 * c3 - s1 * s2 * s3;

  		} else if ( order === 'YXZ' ) {

  			this._x = s1 * c2 * c3 + c1 * s2 * s3;
  			this._y = c1 * s2 * c3 - s1 * c2 * s3;
  			this._z = c1 * c2 * s3 - s1 * s2 * c3;
  			this._w = c1 * c2 * c3 + s1 * s2 * s3;

  		} else if ( order === 'ZXY' ) {

  			this._x = s1 * c2 * c3 - c1 * s2 * s3;
  			this._y = c1 * s2 * c3 + s1 * c2 * s3;
  			this._z = c1 * c2 * s3 + s1 * s2 * c3;
  			this._w = c1 * c2 * c3 - s1 * s2 * s3;

  		} else if ( order === 'ZYX' ) {

  			this._x = s1 * c2 * c3 - c1 * s2 * s3;
  			this._y = c1 * s2 * c3 + s1 * c2 * s3;
  			this._z = c1 * c2 * s3 - s1 * s2 * c3;
  			this._w = c1 * c2 * c3 + s1 * s2 * s3;

  		} else if ( order === 'YZX' ) {

  			this._x = s1 * c2 * c3 + c1 * s2 * s3;
  			this._y = c1 * s2 * c3 + s1 * c2 * s3;
  			this._z = c1 * c2 * s3 - s1 * s2 * c3;
  			this._w = c1 * c2 * c3 - s1 * s2 * s3;

  		} else if ( order === 'XZY' ) {

  			this._x = s1 * c2 * c3 - c1 * s2 * s3;
  			this._y = c1 * s2 * c3 - s1 * c2 * s3;
  			this._z = c1 * c2 * s3 + s1 * s2 * c3;
  			this._w = c1 * c2 * c3 + s1 * s2 * s3;

  		}

  		if ( update !== false ) this.onChangeCallback();

  		return this;

  	},

  	setFromAxisAngle: function ( axis, angle ) {

  		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm

  		// assumes axis is normalized

  		var halfAngle = angle / 2, s = Math.sin( halfAngle );

  		this._x = axis.x * s;
  		this._y = axis.y * s;
  		this._z = axis.z * s;
  		this._w = Math.cos( halfAngle );

  		this.onChangeCallback();

  		return this;

  	},

  	setFromRotationMatrix: function ( m ) {

  		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm

  		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

  		var te = m.elements,

  			m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
  			m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
  			m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ],

  			trace = m11 + m22 + m33,
  			s;

  		if ( trace > 0 ) {

  			s = 0.5 / Math.sqrt( trace + 1.0 );

  			this._w = 0.25 / s;
  			this._x = ( m32 - m23 ) * s;
  			this._y = ( m13 - m31 ) * s;
  			this._z = ( m21 - m12 ) * s;

  		} else if ( m11 > m22 && m11 > m33 ) {

  			s = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );

  			this._w = ( m32 - m23 ) / s;
  			this._x = 0.25 * s;
  			this._y = ( m12 + m21 ) / s;
  			this._z = ( m13 + m31 ) / s;

  		} else if ( m22 > m33 ) {

  			s = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );

  			this._w = ( m13 - m31 ) / s;
  			this._x = ( m12 + m21 ) / s;
  			this._y = 0.25 * s;
  			this._z = ( m23 + m32 ) / s;

  		} else {

  			s = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );

  			this._w = ( m21 - m12 ) / s;
  			this._x = ( m13 + m31 ) / s;
  			this._y = ( m23 + m32 ) / s;
  			this._z = 0.25 * s;

  		}

  		this.onChangeCallback();

  		return this;

  	},

  	setFromUnitVectors: function () {

  		// http://lolengine.net/blog/2014/02/24/quaternion-from-two-vectors-final

  		// assumes direction vectors vFrom and vTo are normalized

  		var v1, r;

  		var EPS = 0.000001;

  		return function setFromUnitVectors( vFrom, vTo ) {

  			if ( v1 === undefined ) v1 = new Vector3();

  			r = vFrom.dot( vTo ) + 1;

  			if ( r < EPS ) {

  				r = 0;

  				if ( Math.abs( vFrom.x ) > Math.abs( vFrom.z ) ) {

  					v1.set( - vFrom.y, vFrom.x, 0 );

  				} else {

  					v1.set( 0, - vFrom.z, vFrom.y );

  				}

  			} else {

  				v1.crossVectors( vFrom, vTo );

  			}

  			this._x = v1.x;
  			this._y = v1.y;
  			this._z = v1.z;
  			this._w = r;

  			return this.normalize();

  		};

  	}(),

  	inverse: function () {

  		return this.conjugate().normalize();

  	},

  	conjugate: function () {

  		this._x *= - 1;
  		this._y *= - 1;
  		this._z *= - 1;

  		this.onChangeCallback();

  		return this;

  	},

  	dot: function ( v ) {

  		return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;

  	},

  	lengthSq: function () {

  		return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;

  	},

  	length: function () {

  		return Math.sqrt( this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w );

  	},

  	normalize: function () {

  		var l = this.length();

  		if ( l === 0 ) {

  			this._x = 0;
  			this._y = 0;
  			this._z = 0;
  			this._w = 1;

  		} else {

  			l = 1 / l;

  			this._x = this._x * l;
  			this._y = this._y * l;
  			this._z = this._z * l;
  			this._w = this._w * l;

  		}

  		this.onChangeCallback();

  		return this;

  	},

  	multiply: function ( q, p ) {

  		if ( p !== undefined ) {

  			console.warn( 'THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.' );
  			return this.multiplyQuaternions( q, p );

  		}

  		return this.multiplyQuaternions( this, q );

  	},

  	premultiply: function ( q ) {

  		return this.multiplyQuaternions( q, this );

  	},

  	multiplyQuaternions: function ( a, b ) {

  		// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm

  		var qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;
  		var qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;

  		this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
  		this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
  		this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
  		this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;

  		this.onChangeCallback();

  		return this;

  	},

  	slerp: function ( qb, t ) {

  		if ( t === 0 ) return this;
  		if ( t === 1 ) return this.copy( qb );

  		var x = this._x, y = this._y, z = this._z, w = this._w;

  		// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

  		var cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;

  		if ( cosHalfTheta < 0 ) {

  			this._w = - qb._w;
  			this._x = - qb._x;
  			this._y = - qb._y;
  			this._z = - qb._z;

  			cosHalfTheta = - cosHalfTheta;

  		} else {

  			this.copy( qb );

  		}

  		if ( cosHalfTheta >= 1.0 ) {

  			this._w = w;
  			this._x = x;
  			this._y = y;
  			this._z = z;

  			return this;

  		}

  		var sinHalfTheta = Math.sqrt( 1.0 - cosHalfTheta * cosHalfTheta );

  		if ( Math.abs( sinHalfTheta ) < 0.001 ) {

  			this._w = 0.5 * ( w + this._w );
  			this._x = 0.5 * ( x + this._x );
  			this._y = 0.5 * ( y + this._y );
  			this._z = 0.5 * ( z + this._z );

  			return this;

  		}

  		var halfTheta = Math.atan2( sinHalfTheta, cosHalfTheta );
  		var ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,
  		ratioB = Math.sin( t * halfTheta ) / sinHalfTheta;

  		this._w = ( w * ratioA + this._w * ratioB );
  		this._x = ( x * ratioA + this._x * ratioB );
  		this._y = ( y * ratioA + this._y * ratioB );
  		this._z = ( z * ratioA + this._z * ratioB );

  		this.onChangeCallback();

  		return this;

  	},

  	equals: function ( quaternion ) {

  		return ( quaternion._x === this._x ) && ( quaternion._y === this._y ) && ( quaternion._z === this._z ) && ( quaternion._w === this._w );

  	},

  	fromArray: function ( array, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this._x = array[ offset ];
  		this._y = array[ offset + 1 ];
  		this._z = array[ offset + 2 ];
  		this._w = array[ offset + 3 ];

  		this.onChangeCallback();

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		array[ offset ] = this._x;
  		array[ offset + 1 ] = this._y;
  		array[ offset + 2 ] = this._z;
  		array[ offset + 3 ] = this._w;

  		return array;

  	},

  	onChange: function ( callback ) {

  		this.onChangeCallback = callback;

  		return this;

  	},

  	onChangeCallback: function () {}

  };

  Object.assign( Quaternion, {

  	slerp: function( qa, qb, qm, t ) {

  		return qm.copy( qa ).slerp( qb, t );

  	},

  	slerpFlat: function(
  			dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {

  		// fuzz-free, array-based Quaternion SLERP operation

  		var x0 = src0[ srcOffset0 + 0 ],
  			y0 = src0[ srcOffset0 + 1 ],
  			z0 = src0[ srcOffset0 + 2 ],
  			w0 = src0[ srcOffset0 + 3 ],

  			x1 = src1[ srcOffset1 + 0 ],
  			y1 = src1[ srcOffset1 + 1 ],
  			z1 = src1[ srcOffset1 + 2 ],
  			w1 = src1[ srcOffset1 + 3 ];

  		if ( w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1 ) {

  			var s = 1 - t,

  				cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,

  				dir = ( cos >= 0 ? 1 : - 1 ),
  				sqrSin = 1 - cos * cos;

  			// Skip the Slerp for tiny steps to avoid numeric problems:
  			if ( sqrSin > Number.EPSILON ) {

  				var sin = Math.sqrt( sqrSin ),
  					len = Math.atan2( sin, cos * dir );

  				s = Math.sin( s * len ) / sin;
  				t = Math.sin( t * len ) / sin;

  			}

  			var tDir = t * dir;

  			x0 = x0 * s + x1 * tDir;
  			y0 = y0 * s + y1 * tDir;
  			z0 = z0 * s + z1 * tDir;
  			w0 = w0 * s + w1 * tDir;

  			// Normalize in case we just did a lerp:
  			if ( s === 1 - t ) {

  				var f = 1 / Math.sqrt( x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0 );

  				x0 *= f;
  				y0 *= f;
  				z0 *= f;
  				w0 *= f;

  			}

  		}

  		dst[ dstOffset ] = x0;
  		dst[ dstOffset + 1 ] = y0;
  		dst[ dstOffset + 2 ] = z0;
  		dst[ dstOffset + 3 ] = w0;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author *kile / http://kile.stravaganza.org/
   * @author philogb / http://blog.thejit.org/
   * @author mikael emtinger / http://gomo.se/
   * @author egraether / http://egraether.com/
   * @author WestLangley / http://github.com/WestLangley
   */

  function Vector3( x, y, z ) {

  	this.x = x || 0;
  	this.y = y || 0;
  	this.z = z || 0;

  };

  Vector3.prototype = {

  	constructor: Vector3,

  	isVector3: true,

  	set: function ( x, y, z ) {

  		this.x = x;
  		this.y = y;
  		this.z = z;

  		return this;

  	},

  	setScalar: function ( scalar ) {

  		this.x = scalar;
  		this.y = scalar;
  		this.z = scalar;

  		return this;

  	},

  	setX: function ( x ) {

  		this.x = x;

  		return this;

  	},

  	setY: function ( y ) {

  		this.y = y;

  		return this;

  	},

  	setZ: function ( z ) {

  		this.z = z;

  		return this;

  	},

  	setComponent: function ( index, value ) {

  		switch ( index ) {

  			case 0: this.x = value; break;
  			case 1: this.y = value; break;
  			case 2: this.z = value; break;
  			default: throw new Error( 'index is out of range: ' + index );

  		}

  	},

  	getComponent: function ( index ) {

  		switch ( index ) {

  			case 0: return this.x;
  			case 1: return this.y;
  			case 2: return this.z;
  			default: throw new Error( 'index is out of range: ' + index );

  		}

  	},

  	clone: function () {

  		return new this.constructor( this.x, this.y, this.z );

  	},

  	copy: function ( v ) {

  		this.x = v.x;
  		this.y = v.y;
  		this.z = v.z;

  		return this;

  	},

  	add: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
  			return this.addVectors( v, w );

  		}

  		this.x += v.x;
  		this.y += v.y;
  		this.z += v.z;

  		return this;

  	},

  	addScalar: function ( s ) {

  		this.x += s;
  		this.y += s;
  		this.z += s;

  		return this;

  	},

  	addVectors: function ( a, b ) {

  		this.x = a.x + b.x;
  		this.y = a.y + b.y;
  		this.z = a.z + b.z;

  		return this;

  	},

  	addScaledVector: function ( v, s ) {

  		this.x += v.x * s;
  		this.y += v.y * s;
  		this.z += v.z * s;

  		return this;

  	},

  	sub: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
  			return this.subVectors( v, w );

  		}

  		this.x -= v.x;
  		this.y -= v.y;
  		this.z -= v.z;

  		return this;

  	},

  	subScalar: function ( s ) {

  		this.x -= s;
  		this.y -= s;
  		this.z -= s;

  		return this;

  	},

  	subVectors: function ( a, b ) {

  		this.x = a.x - b.x;
  		this.y = a.y - b.y;
  		this.z = a.z - b.z;

  		return this;

  	},

  	multiply: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.' );
  			return this.multiplyVectors( v, w );

  		}

  		this.x *= v.x;
  		this.y *= v.y;
  		this.z *= v.z;

  		return this;

  	},

  	multiplyScalar: function ( scalar ) {

  		if ( isFinite( scalar ) ) {

  			this.x *= scalar;
  			this.y *= scalar;
  			this.z *= scalar;

  		} else {

  			this.x = 0;
  			this.y = 0;
  			this.z = 0;

  		}

  		return this;

  	},

  	multiplyVectors: function ( a, b ) {

  		this.x = a.x * b.x;
  		this.y = a.y * b.y;
  		this.z = a.z * b.z;

  		return this;

  	},

  	applyEuler: function () {

  		var quaternion;

  		return function applyEuler( euler ) {

  			if ( (euler && euler.isEuler) === false ) {

  				console.error( 'THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.' );

  			}

  			if ( quaternion === undefined ) quaternion = new Quaternion();

  			return this.applyQuaternion( quaternion.setFromEuler( euler ) );

  		};

  	}(),

  	applyAxisAngle: function () {

  		var quaternion;

  		return function applyAxisAngle( axis, angle ) {

  			if ( quaternion === undefined ) quaternion = new Quaternion();

  			return this.applyQuaternion( quaternion.setFromAxisAngle( axis, angle ) );

  		};

  	}(),

  	applyMatrix3: function ( m ) {

  		var x = this.x, y = this.y, z = this.z;
  		var e = m.elements;

  		this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ] * z;
  		this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ] * z;
  		this.z = e[ 2 ] * x + e[ 5 ] * y + e[ 8 ] * z;

  		return this;

  	},

  	applyMatrix4: function ( m ) {

  		// input: THREE.Matrix4 affine matrix

  		var x = this.x, y = this.y, z = this.z;
  		var e = m.elements;

  		this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ]  * z + e[ 12 ];
  		this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ]  * z + e[ 13 ];
  		this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ];

  		return this;

  	},

  	applyProjection: function ( m ) {

  		// input: THREE.Matrix4 projection matrix

  		var x = this.x, y = this.y, z = this.z;
  		var e = m.elements;
  		var d = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] ); // perspective divide

  		this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ]  * z + e[ 12 ] ) * d;
  		this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ]  * z + e[ 13 ] ) * d;
  		this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * d;

  		return this;

  	},

  	applyQuaternion: function ( q ) {

  		var x = this.x, y = this.y, z = this.z;
  		var qx = q.x, qy = q.y, qz = q.z, qw = q.w;

  		// calculate quat * vector

  		var ix =  qw * x + qy * z - qz * y;
  		var iy =  qw * y + qz * x - qx * z;
  		var iz =  qw * z + qx * y - qy * x;
  		var iw = - qx * x - qy * y - qz * z;

  		// calculate result * inverse quat

  		this.x = ix * qw + iw * - qx + iy * - qz - iz * - qy;
  		this.y = iy * qw + iw * - qy + iz * - qx - ix * - qz;
  		this.z = iz * qw + iw * - qz + ix * - qy - iy * - qx;

  		return this;

  	},

  	project: function () {

  		var matrix;

  		return function project( camera ) {

  			if ( matrix === undefined ) matrix = new Matrix4();

  			matrix.multiplyMatrices( camera.projectionMatrix, matrix.getInverse( camera.matrixWorld ) );
  			return this.applyProjection( matrix );

  		};

  	}(),

  	unproject: function () {

  		var matrix;

  		return function unproject( camera ) {

  			if ( matrix === undefined ) matrix = new Matrix4();

  			matrix.multiplyMatrices( camera.matrixWorld, matrix.getInverse( camera.projectionMatrix ) );
  			return this.applyProjection( matrix );

  		};

  	}(),

  	transformDirection: function ( m ) {

  		// input: THREE.Matrix4 affine matrix
  		// vector interpreted as a direction

  		var x = this.x, y = this.y, z = this.z;
  		var e = m.elements;

  		this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ]  * z;
  		this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ]  * z;
  		this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z;

  		return this.normalize();

  	},

  	divide: function ( v ) {

  		this.x /= v.x;
  		this.y /= v.y;
  		this.z /= v.z;

  		return this;

  	},

  	divideScalar: function ( scalar ) {

  		return this.multiplyScalar( 1 / scalar );

  	},

  	min: function ( v ) {

  		this.x = Math.min( this.x, v.x );
  		this.y = Math.min( this.y, v.y );
  		this.z = Math.min( this.z, v.z );

  		return this;

  	},

  	max: function ( v ) {

  		this.x = Math.max( this.x, v.x );
  		this.y = Math.max( this.y, v.y );
  		this.z = Math.max( this.z, v.z );

  		return this;

  	},

  	clamp: function ( min, max ) {

  		// This function assumes min < max, if this assumption isn't true it will not operate correctly

  		this.x = Math.max( min.x, Math.min( max.x, this.x ) );
  		this.y = Math.max( min.y, Math.min( max.y, this.y ) );
  		this.z = Math.max( min.z, Math.min( max.z, this.z ) );

  		return this;

  	},

  	clampScalar: function () {

  		var min, max;

  		return function clampScalar( minVal, maxVal ) {

  			if ( min === undefined ) {

  				min = new Vector3();
  				max = new Vector3();

  			}

  			min.set( minVal, minVal, minVal );
  			max.set( maxVal, maxVal, maxVal );

  			return this.clamp( min, max );

  		};

  	}(),

  	clampLength: function ( min, max ) {

  		var length = this.length();

  		return this.multiplyScalar( Math.max( min, Math.min( max, length ) ) / length );

  	},

  	floor: function () {

  		this.x = Math.floor( this.x );
  		this.y = Math.floor( this.y );
  		this.z = Math.floor( this.z );

  		return this;

  	},

  	ceil: function () {

  		this.x = Math.ceil( this.x );
  		this.y = Math.ceil( this.y );
  		this.z = Math.ceil( this.z );

  		return this;

  	},

  	round: function () {

  		this.x = Math.round( this.x );
  		this.y = Math.round( this.y );
  		this.z = Math.round( this.z );

  		return this;

  	},

  	roundToZero: function () {

  		this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
  		this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
  		this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );

  		return this;

  	},

  	negate: function () {

  		this.x = - this.x;
  		this.y = - this.y;
  		this.z = - this.z;

  		return this;

  	},

  	dot: function ( v ) {

  		return this.x * v.x + this.y * v.y + this.z * v.z;

  	},

  	lengthSq: function () {

  		return this.x * this.x + this.y * this.y + this.z * this.z;

  	},

  	length: function () {

  		return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z );

  	},

  	lengthManhattan: function () {

  		return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );

  	},

  	normalize: function () {

  		return this.divideScalar( this.length() );

  	},

  	setLength: function ( length ) {

  		return this.multiplyScalar( length / this.length() );

  	},

  	lerp: function ( v, alpha ) {

  		this.x += ( v.x - this.x ) * alpha;
  		this.y += ( v.y - this.y ) * alpha;
  		this.z += ( v.z - this.z ) * alpha;

  		return this;

  	},

  	lerpVectors: function ( v1, v2, alpha ) {

  		return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );

  	},

  	cross: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.' );
  			return this.crossVectors( v, w );

  		}

  		var x = this.x, y = this.y, z = this.z;

  		this.x = y * v.z - z * v.y;
  		this.y = z * v.x - x * v.z;
  		this.z = x * v.y - y * v.x;

  		return this;

  	},

  	crossVectors: function ( a, b ) {

  		var ax = a.x, ay = a.y, az = a.z;
  		var bx = b.x, by = b.y, bz = b.z;

  		this.x = ay * bz - az * by;
  		this.y = az * bx - ax * bz;
  		this.z = ax * by - ay * bx;

  		return this;

  	},

  	projectOnVector: function ( vector ) {

  		var scalar = vector.dot( this ) / vector.lengthSq();

  		return this.copy( vector ).multiplyScalar( scalar );

  	},

  	projectOnPlane: function () {

  		var v1;

  		return function projectOnPlane( planeNormal ) {

  			if ( v1 === undefined ) v1 = new Vector3();

  			v1.copy( this ).projectOnVector( planeNormal );

  			return this.sub( v1 );

  		};

  	}(),

  	reflect: function () {

  		// reflect incident vector off plane orthogonal to normal
  		// normal is assumed to have unit length

  		var v1;

  		return function reflect( normal ) {

  			if ( v1 === undefined ) v1 = new Vector3();

  			return this.sub( v1.copy( normal ).multiplyScalar( 2 * this.dot( normal ) ) );

  		};

  	}(),

  	angleTo: function ( v ) {

  		var theta = this.dot( v ) / ( Math.sqrt( this.lengthSq() * v.lengthSq() ) );

  		// clamp, to handle numerical problems

  		return Math.acos( exports.Math.clamp( theta, - 1, 1 ) );

  	},

  	distanceTo: function ( v ) {

  		return Math.sqrt( this.distanceToSquared( v ) );

  	},

  	distanceToSquared: function ( v ) {

  		var dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;

  		return dx * dx + dy * dy + dz * dz;

  	},

  	distanceToManhattan: function ( v ) {

  		return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y ) + Math.abs( this.z - v.z );

  	},

  	setFromSpherical: function( s ) {

  		var sinPhiRadius = Math.sin( s.phi ) * s.radius;

  		this.x = sinPhiRadius * Math.sin( s.theta );
  		this.y = Math.cos( s.phi ) * s.radius;
  		this.z = sinPhiRadius * Math.cos( s.theta );

  		return this;

  	},

  	setFromMatrixPosition: function ( m ) {

  		return this.setFromMatrixColumn( m, 3 );

  	},

  	setFromMatrixScale: function ( m ) {

  		var sx = this.setFromMatrixColumn( m, 0 ).length();
  		var sy = this.setFromMatrixColumn( m, 1 ).length();
  		var sz = this.setFromMatrixColumn( m, 2 ).length();

  		this.x = sx;
  		this.y = sy;
  		this.z = sz;

  		return this;

  	},

  	setFromMatrixColumn: function ( m, index ) {

  		if ( typeof m === 'number' ) {

  			console.warn( 'THREE.Vector3: setFromMatrixColumn now expects ( matrix, index ).' );
  			var temp = m
  			m = index;
  			index = temp;

  		}

  		return this.fromArray( m.elements, index * 4 );

  	},

  	equals: function ( v ) {

  		return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );

  	},

  	fromArray: function ( array, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this.x = array[ offset ];
  		this.y = array[ offset + 1 ];
  		this.z = array[ offset + 2 ];

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		array[ offset ] = this.x;
  		array[ offset + 1 ] = this.y;
  		array[ offset + 2 ] = this.z;

  		return array;

  	},

  	fromAttribute: function ( attribute, index, offset ) {

  		if ( offset === undefined ) offset = 0;

  		index = index * attribute.itemSize + offset;

  		this.x = attribute.array[ index ];
  		this.y = attribute.array[ index + 1 ];
  		this.z = attribute.array[ index + 2 ];

  		return this;

  	}

  };

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   */

  function SpritePlugin( renderer, sprites ) {

  	var gl = renderer.context;
  	var state = renderer.state;

  	var vertexBuffer, elementBuffer;
  	var program, attributes, uniforms;

  	var texture;

  	// decompose matrixWorld

  	var spritePosition = new Vector3();
  	var spriteRotation = new Quaternion();
  	var spriteScale = new Vector3();

  	function init() {

  		var vertices = new Float32Array( [
  			- 0.5, - 0.5,  0, 0,
  			  0.5, - 0.5,  1, 0,
  			  0.5,   0.5,  1, 1,
  			- 0.5,   0.5,  0, 1
  		] );

  		var faces = new Uint16Array( [
  			0, 1, 2,
  			0, 2, 3
  		] );

  		vertexBuffer  = gl.createBuffer();
  		elementBuffer = gl.createBuffer();

  		gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
  		gl.bufferData( gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW );

  		gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );
  		gl.bufferData( gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW );

  		program = createProgram();

  		attributes = {
  			position:			gl.getAttribLocation ( program, 'position' ),
  			uv:					gl.getAttribLocation ( program, 'uv' )
  		};

  		uniforms = {
  			uvOffset:			gl.getUniformLocation( program, 'uvOffset' ),
  			uvScale:			gl.getUniformLocation( program, 'uvScale' ),

  			rotation:			gl.getUniformLocation( program, 'rotation' ),
  			scale:				gl.getUniformLocation( program, 'scale' ),

  			color:				gl.getUniformLocation( program, 'color' ),
  			map:				gl.getUniformLocation( program, 'map' ),
  			opacity:			gl.getUniformLocation( program, 'opacity' ),

  			modelViewMatrix: 	gl.getUniformLocation( program, 'modelViewMatrix' ),
  			projectionMatrix:	gl.getUniformLocation( program, 'projectionMatrix' ),

  			fogType:			gl.getUniformLocation( program, 'fogType' ),
  			fogDensity:			gl.getUniformLocation( program, 'fogDensity' ),
  			fogNear:			gl.getUniformLocation( program, 'fogNear' ),
  			fogFar:				gl.getUniformLocation( program, 'fogFar' ),
  			fogColor:			gl.getUniformLocation( program, 'fogColor' ),

  			alphaTest:			gl.getUniformLocation( program, 'alphaTest' )
  		};

  		var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
  		canvas.width = 8;
  		canvas.height = 8;

  		var context = canvas.getContext( '2d' );
  		context.fillStyle = 'white';
  		context.fillRect( 0, 0, 8, 8 );

  		texture = new Texture( canvas );
  		texture.needsUpdate = true;

  	}

  	this.render = function ( scene, camera ) {

  		if ( sprites.length === 0 ) return;

  		// setup gl

  		if ( program === undefined ) {

  			init();

  		}

  		gl.useProgram( program );

  		state.initAttributes();
  		state.enableAttribute( attributes.position );
  		state.enableAttribute( attributes.uv );
  		state.disableUnusedAttributes();

  		state.disable( gl.CULL_FACE );
  		state.enable( gl.BLEND );

  		gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
  		gl.vertexAttribPointer( attributes.position, 2, gl.FLOAT, false, 2 * 8, 0 );
  		gl.vertexAttribPointer( attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8 );

  		gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );

  		gl.uniformMatrix4fv( uniforms.projectionMatrix, false, camera.projectionMatrix.elements );

  		state.activeTexture( gl.TEXTURE0 );
  		gl.uniform1i( uniforms.map, 0 );

  		var oldFogType = 0;
  		var sceneFogType = 0;
  		var fog = scene.fog;

  		if ( fog ) {

  			gl.uniform3f( uniforms.fogColor, fog.color.r, fog.color.g, fog.color.b );

  			if ( (fog && fog.isFog) ) {

  				gl.uniform1f( uniforms.fogNear, fog.near );
  				gl.uniform1f( uniforms.fogFar, fog.far );

  				gl.uniform1i( uniforms.fogType, 1 );
  				oldFogType = 1;
  				sceneFogType = 1;

  			} else if ( (fog && fog.isFogExp2) ) {

  				gl.uniform1f( uniforms.fogDensity, fog.density );

  				gl.uniform1i( uniforms.fogType, 2 );
  				oldFogType = 2;
  				sceneFogType = 2;

  			}

  		} else {

  			gl.uniform1i( uniforms.fogType, 0 );
  			oldFogType = 0;
  			sceneFogType = 0;

  		}


  		// update positions and sort

  		for ( var i = 0, l = sprites.length; i < l; i ++ ) {

  			var sprite = sprites[ i ];

  			sprite.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, sprite.matrixWorld );
  			sprite.z = - sprite.modelViewMatrix.elements[ 14 ];

  		}

  		sprites.sort( painterSortStable );

  		// render all sprites

  		var scale = [];

  		for ( var i = 0, l = sprites.length; i < l; i ++ ) {

  			var sprite = sprites[ i ];
  			var material = sprite.material;

  			if ( material.visible === false ) continue;

  			gl.uniform1f( uniforms.alphaTest, material.alphaTest );
  			gl.uniformMatrix4fv( uniforms.modelViewMatrix, false, sprite.modelViewMatrix.elements );

  			sprite.matrixWorld.decompose( spritePosition, spriteRotation, spriteScale );

  			scale[ 0 ] = spriteScale.x;
  			scale[ 1 ] = spriteScale.y;

  			var fogType = 0;

  			if ( scene.fog && material.fog ) {

  				fogType = sceneFogType;

  			}

  			if ( oldFogType !== fogType ) {

  				gl.uniform1i( uniforms.fogType, fogType );
  				oldFogType = fogType;

  			}

  			if ( material.map !== null ) {

  				gl.uniform2f( uniforms.uvOffset, material.map.offset.x, material.map.offset.y );
  				gl.uniform2f( uniforms.uvScale, material.map.repeat.x, material.map.repeat.y );

  			} else {

  				gl.uniform2f( uniforms.uvOffset, 0, 0 );
  				gl.uniform2f( uniforms.uvScale, 1, 1 );

  			}

  			gl.uniform1f( uniforms.opacity, material.opacity );
  			gl.uniform3f( uniforms.color, material.color.r, material.color.g, material.color.b );

  			gl.uniform1f( uniforms.rotation, material.rotation );
  			gl.uniform2fv( uniforms.scale, scale );

  			state.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst );
  			state.setDepthTest( material.depthTest );
  			state.setDepthWrite( material.depthWrite );

  			if ( material.map ) {

  				renderer.setTexture2D( material.map, 0 );

  			} else {

  				renderer.setTexture2D( texture, 0 );

  			}

  			gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );

  		}

  		// restore gl

  		state.enable( gl.CULL_FACE );

  		renderer.resetGLState();

  	};

  	function createProgram() {

  		var program = gl.createProgram();

  		var vertexShader = gl.createShader( gl.VERTEX_SHADER );
  		var fragmentShader = gl.createShader( gl.FRAGMENT_SHADER );

  		gl.shaderSource( vertexShader, [

  			'precision ' + renderer.getPrecision() + ' float;',

  			'uniform mat4 modelViewMatrix;',
  			'uniform mat4 projectionMatrix;',
  			'uniform float rotation;',
  			'uniform vec2 scale;',
  			'uniform vec2 uvOffset;',
  			'uniform vec2 uvScale;',

  			'attribute vec2 position;',
  			'attribute vec2 uv;',

  			'varying vec2 vUV;',

  			'void main() {',

  				'vUV = uvOffset + uv * uvScale;',

  				'vec2 alignedPosition = position * scale;',

  				'vec2 rotatedPosition;',
  				'rotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;',
  				'rotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;',

  				'vec4 finalPosition;',

  				'finalPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );',
  				'finalPosition.xy += rotatedPosition;',
  				'finalPosition = projectionMatrix * finalPosition;',

  				'gl_Position = finalPosition;',

  			'}'

  		].join( '\n' ) );

  		gl.shaderSource( fragmentShader, [

  			'precision ' + renderer.getPrecision() + ' float;',

  			'uniform vec3 color;',
  			'uniform sampler2D map;',
  			'uniform float opacity;',

  			'uniform int fogType;',
  			'uniform vec3 fogColor;',
  			'uniform float fogDensity;',
  			'uniform float fogNear;',
  			'uniform float fogFar;',
  			'uniform float alphaTest;',

  			'varying vec2 vUV;',

  			'void main() {',

  				'vec4 texture = texture2D( map, vUV );',

  				'if ( texture.a < alphaTest ) discard;',

  				'gl_FragColor = vec4( color * texture.xyz, texture.a * opacity );',

  				'if ( fogType > 0 ) {',

  					'float depth = gl_FragCoord.z / gl_FragCoord.w;',
  					'float fogFactor = 0.0;',

  					'if ( fogType == 1 ) {',

  						'fogFactor = smoothstep( fogNear, fogFar, depth );',

  					'} else {',

  						'const float LOG2 = 1.442695;',
  						'fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );',
  						'fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );',

  					'}',

  					'gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );',

  				'}',

  			'}'

  		].join( '\n' ) );

  		gl.compileShader( vertexShader );
  		gl.compileShader( fragmentShader );

  		gl.attachShader( program, vertexShader );
  		gl.attachShader( program, fragmentShader );

  		gl.linkProgram( program );

  		return program;

  	}

  	function painterSortStable( a, b ) {

  		if ( a.renderOrder !== b.renderOrder ) {

  			return a.renderOrder - b.renderOrder;

  		} else if ( a.z !== b.z ) {

  			return b.z - a.z;

  		} else {

  			return b.id - a.id;

  		}

  	}

  };

  /**
   * @author bhouston / http://clara.io
   */

  function Box2( min, max ) {

  	this.min = ( min !== undefined ) ? min : new Vector2( + Infinity, + Infinity );
  	this.max = ( max !== undefined ) ? max : new Vector2( - Infinity, - Infinity );

  };

  Box2.prototype = {

  	constructor: Box2,

  	set: function ( min, max ) {

  		this.min.copy( min );
  		this.max.copy( max );

  		return this;

  	},

  	setFromPoints: function ( points ) {

  		this.makeEmpty();

  		for ( var i = 0, il = points.length; i < il; i ++ ) {

  			this.expandByPoint( points[ i ] );

  		}

  		return this;

  	},

  	setFromCenterAndSize: function () {

  		var v1 = new Vector2();

  		return function setFromCenterAndSize( center, size ) {

  			var halfSize = v1.copy( size ).multiplyScalar( 0.5 );
  			this.min.copy( center ).sub( halfSize );
  			this.max.copy( center ).add( halfSize );

  			return this;

  		};

  	}(),

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( box ) {

  		this.min.copy( box.min );
  		this.max.copy( box.max );

  		return this;

  	},

  	makeEmpty: function () {

  		this.min.x = this.min.y = + Infinity;
  		this.max.x = this.max.y = - Infinity;

  		return this;

  	},

  	isEmpty: function () {

  		// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

  		return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y );

  	},

  	center: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector2();
  		return result.addVectors( this.min, this.max ).multiplyScalar( 0.5 );

  	},

  	size: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector2();
  		return result.subVectors( this.max, this.min );

  	},

  	expandByPoint: function ( point ) {

  		this.min.min( point );
  		this.max.max( point );

  		return this;

  	},

  	expandByVector: function ( vector ) {

  		this.min.sub( vector );
  		this.max.add( vector );

  		return this;

  	},

  	expandByScalar: function ( scalar ) {

  		this.min.addScalar( - scalar );
  		this.max.addScalar( scalar );

  		return this;

  	},

  	containsPoint: function ( point ) {

  		if ( point.x < this.min.x || point.x > this.max.x ||
  		     point.y < this.min.y || point.y > this.max.y ) {

  			return false;

  		}

  		return true;

  	},

  	containsBox: function ( box ) {

  		if ( ( this.min.x <= box.min.x ) && ( box.max.x <= this.max.x ) &&
  		     ( this.min.y <= box.min.y ) && ( box.max.y <= this.max.y ) ) {

  			return true;

  		}

  		return false;

  	},

  	getParameter: function ( point, optionalTarget ) {

  		// This can potentially have a divide by zero if the box
  		// has a size dimension of 0.

  		var result = optionalTarget || new Vector2();

  		return result.set(
  			( point.x - this.min.x ) / ( this.max.x - this.min.x ),
  			( point.y - this.min.y ) / ( this.max.y - this.min.y )
  		);

  	},

  	intersectsBox: function ( box ) {

  		// using 6 splitting planes to rule out intersections.

  		if ( box.max.x < this.min.x || box.min.x > this.max.x ||
  		     box.max.y < this.min.y || box.min.y > this.max.y ) {

  			return false;

  		}

  		return true;

  	},

  	clampPoint: function ( point, optionalTarget ) {

  		var result = optionalTarget || new Vector2();
  		return result.copy( point ).clamp( this.min, this.max );

  	},

  	distanceToPoint: function () {

  		var v1 = new Vector2();

  		return function distanceToPoint( point ) {

  			var clampedPoint = v1.copy( point ).clamp( this.min, this.max );
  			return clampedPoint.sub( point ).length();

  		};

  	}(),

  	intersect: function ( box ) {

  		this.min.max( box.min );
  		this.max.min( box.max );

  		return this;

  	},

  	union: function ( box ) {

  		this.min.min( box.min );
  		this.max.max( box.max );

  		return this;

  	},

  	translate: function ( offset ) {

  		this.min.add( offset );
  		this.max.add( offset );

  		return this;

  	},

  	equals: function ( box ) {

  		return box.min.equals( this.min ) && box.max.equals( this.max );

  	}

  };

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   */

  function LensFlarePlugin( renderer, flares ) {

  	var gl = renderer.context;
  	var state = renderer.state;

  	var vertexBuffer, elementBuffer;
  	var shader, program, attributes, uniforms;

  	var tempTexture, occlusionTexture;

  	function init() {

  		var vertices = new Float32Array( [
  			- 1, - 1,  0, 0,
  			 1, - 1,  1, 0,
  			 1,  1,  1, 1,
  			- 1,  1,  0, 1
  		] );

  		var faces = new Uint16Array( [
  			0, 1, 2,
  			0, 2, 3
  		] );

  		// buffers

  		vertexBuffer     = gl.createBuffer();
  		elementBuffer    = gl.createBuffer();

  		gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
  		gl.bufferData( gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW );

  		gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );
  		gl.bufferData( gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW );

  		// textures

  		tempTexture      = gl.createTexture();
  		occlusionTexture = gl.createTexture();

  		state.bindTexture( gl.TEXTURE_2D, tempTexture );
  		gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGB, 16, 16, 0, gl.RGB, gl.UNSIGNED_BYTE, null );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST );

  		state.bindTexture( gl.TEXTURE_2D, occlusionTexture );
  		gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, 16, 16, 0, gl.RGBA, gl.UNSIGNED_BYTE, null );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
  		gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST );

  		shader = {

  			vertexShader: [

  				"uniform lowp int renderType;",

  				"uniform vec3 screenPosition;",
  				"uniform vec2 scale;",
  				"uniform float rotation;",

  				"uniform sampler2D occlusionMap;",

  				"attribute vec2 position;",
  				"attribute vec2 uv;",

  				"varying vec2 vUV;",
  				"varying float vVisibility;",

  				"void main() {",

  					"vUV = uv;",

  					"vec2 pos = position;",

  					"if ( renderType == 2 ) {",

  						"vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.5, 0.1 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.9, 0.1 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.9, 0.9 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.1, 0.9 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) );",
  						"visibility += texture2D( occlusionMap, vec2( 0.5, 0.5 ) );",

  						"vVisibility =        visibility.r / 9.0;",
  						"vVisibility *= 1.0 - visibility.g / 9.0;",
  						"vVisibility *=       visibility.b / 9.0;",
  						"vVisibility *= 1.0 - visibility.a / 9.0;",

  						"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;",
  						"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;",

  					"}",

  					"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );",

  				"}"

  			].join( "\n" ),

  			fragmentShader: [

  				"uniform lowp int renderType;",

  				"uniform sampler2D map;",
  				"uniform float opacity;",
  				"uniform vec3 color;",

  				"varying vec2 vUV;",
  				"varying float vVisibility;",

  				"void main() {",

  					// pink square

  					"if ( renderType == 0 ) {",

  						"gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );",

  					// restore

  					"} else if ( renderType == 1 ) {",

  						"gl_FragColor = texture2D( map, vUV );",

  					// flare

  					"} else {",

  						"vec4 texture = texture2D( map, vUV );",
  						"texture.a *= opacity * vVisibility;",
  						"gl_FragColor = texture;",
  						"gl_FragColor.rgb *= color;",

  					"}",

  				"}"

  			].join( "\n" )

  		};

  		program = createProgram( shader );

  		attributes = {
  			vertex: gl.getAttribLocation ( program, "position" ),
  			uv:     gl.getAttribLocation ( program, "uv" )
  		};

  		uniforms = {
  			renderType:     gl.getUniformLocation( program, "renderType" ),
  			map:            gl.getUniformLocation( program, "map" ),
  			occlusionMap:   gl.getUniformLocation( program, "occlusionMap" ),
  			opacity:        gl.getUniformLocation( program, "opacity" ),
  			color:          gl.getUniformLocation( program, "color" ),
  			scale:          gl.getUniformLocation( program, "scale" ),
  			rotation:       gl.getUniformLocation( program, "rotation" ),
  			screenPosition: gl.getUniformLocation( program, "screenPosition" )
  		};

  	}

  	/*
  	 * Render lens flares
  	 * Method: renders 16x16 0xff00ff-colored points scattered over the light source area,
  	 *         reads these back and calculates occlusion.
  	 */

  	this.render = function ( scene, camera, viewport ) {

  		if ( flares.length === 0 ) return;

  		var tempPosition = new Vector3();

  		var invAspect = viewport.w / viewport.z,
  			halfViewportWidth = viewport.z * 0.5,
  			halfViewportHeight = viewport.w * 0.5;

  		var size = 16 / viewport.w,
  			scale = new Vector2( size * invAspect, size );

  		var screenPosition = new Vector3( 1, 1, 0 ),
  			screenPositionPixels = new Vector2( 1, 1 );

  		var validArea = new Box2();

  		validArea.min.set( 0, 0 );
  		validArea.max.set( viewport.z - 16, viewport.w - 16 );

  		if ( program === undefined ) {

  			init();

  		}

  		gl.useProgram( program );

  		state.initAttributes();
  		state.enableAttribute( attributes.vertex );
  		state.enableAttribute( attributes.uv );
  		state.disableUnusedAttributes();

  		// loop through all lens flares to update their occlusion and positions
  		// setup gl and common used attribs/uniforms

  		gl.uniform1i( uniforms.occlusionMap, 0 );
  		gl.uniform1i( uniforms.map, 1 );

  		gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
  		gl.vertexAttribPointer( attributes.vertex, 2, gl.FLOAT, false, 2 * 8, 0 );
  		gl.vertexAttribPointer( attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8 );

  		gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );

  		state.disable( gl.CULL_FACE );
  		state.setDepthWrite( false );

  		for ( var i = 0, l = flares.length; i < l; i ++ ) {

  			size = 16 / viewport.w;
  			scale.set( size * invAspect, size );

  			// calc object screen position

  			var flare = flares[ i ];

  			tempPosition.set( flare.matrixWorld.elements[ 12 ], flare.matrixWorld.elements[ 13 ], flare.matrixWorld.elements[ 14 ] );

  			tempPosition.applyMatrix4( camera.matrixWorldInverse );
  			tempPosition.applyProjection( camera.projectionMatrix );

  			// setup arrays for gl programs

  			screenPosition.copy( tempPosition );

  			// horizontal and vertical coordinate of the lower left corner of the pixels to copy

  			screenPositionPixels.x = viewport.x + ( screenPosition.x * halfViewportWidth ) + halfViewportWidth - 8;
  			screenPositionPixels.y = viewport.y + ( screenPosition.y * halfViewportHeight ) + halfViewportHeight - 8;

  			// screen cull

  			if ( validArea.containsPoint( screenPositionPixels ) === true ) {

  				// save current RGB to temp texture

  				state.activeTexture( gl.TEXTURE0 );
  				state.bindTexture( gl.TEXTURE_2D, null );
  				state.activeTexture( gl.TEXTURE1 );
  				state.bindTexture( gl.TEXTURE_2D, tempTexture );
  				gl.copyTexImage2D( gl.TEXTURE_2D, 0, gl.RGB, screenPositionPixels.x, screenPositionPixels.y, 16, 16, 0 );


  				// render pink quad

  				gl.uniform1i( uniforms.renderType, 0 );
  				gl.uniform2f( uniforms.scale, scale.x, scale.y );
  				gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );

  				state.disable( gl.BLEND );
  				state.enable( gl.DEPTH_TEST );

  				gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );


  				// copy result to occlusionMap

  				state.activeTexture( gl.TEXTURE0 );
  				state.bindTexture( gl.TEXTURE_2D, occlusionTexture );
  				gl.copyTexImage2D( gl.TEXTURE_2D, 0, gl.RGBA, screenPositionPixels.x, screenPositionPixels.y, 16, 16, 0 );


  				// restore graphics

  				gl.uniform1i( uniforms.renderType, 1 );
  				state.disable( gl.DEPTH_TEST );

  				state.activeTexture( gl.TEXTURE1 );
  				state.bindTexture( gl.TEXTURE_2D, tempTexture );
  				gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );


  				// update object positions

  				flare.positionScreen.copy( screenPosition );

  				if ( flare.customUpdateCallback ) {

  					flare.customUpdateCallback( flare );

  				} else {

  					flare.updateLensFlares();

  				}

  				// render flares

  				gl.uniform1i( uniforms.renderType, 2 );
  				state.enable( gl.BLEND );

  				for ( var j = 0, jl = flare.lensFlares.length; j < jl; j ++ ) {

  					var sprite = flare.lensFlares[ j ];

  					if ( sprite.opacity > 0.001 && sprite.scale > 0.001 ) {

  						screenPosition.x = sprite.x;
  						screenPosition.y = sprite.y;
  						screenPosition.z = sprite.z;

  						size = sprite.size * sprite.scale / viewport.w;

  						scale.x = size * invAspect;
  						scale.y = size;

  						gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );
  						gl.uniform2f( uniforms.scale, scale.x, scale.y );
  						gl.uniform1f( uniforms.rotation, sprite.rotation );

  						gl.uniform1f( uniforms.opacity, sprite.opacity );
  						gl.uniform3f( uniforms.color, sprite.color.r, sprite.color.g, sprite.color.b );

  						state.setBlending( sprite.blending, sprite.blendEquation, sprite.blendSrc, sprite.blendDst );
  						renderer.setTexture2D( sprite.texture, 1 );

  						gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );

  					}

  				}

  			}

  		}

  		// restore gl

  		state.enable( gl.CULL_FACE );
  		state.enable( gl.DEPTH_TEST );
  		state.setDepthWrite( true );

  		renderer.resetGLState();

  	};

  	function createProgram( shader ) {

  		var program = gl.createProgram();

  		var fragmentShader = gl.createShader( gl.FRAGMENT_SHADER );
  		var vertexShader = gl.createShader( gl.VERTEX_SHADER );

  		var prefix = "precision " + renderer.getPrecision() + " float;\n";

  		gl.shaderSource( fragmentShader, prefix + shader.fragmentShader );
  		gl.shaderSource( vertexShader, prefix + shader.vertexShader );

  		gl.compileShader( fragmentShader );
  		gl.compileShader( vertexShader );

  		gl.attachShader( program, fragmentShader );
  		gl.attachShader( program, vertexShader );

  		gl.linkProgram( program );

  		return program;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function CubeTexture( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {

  	images = images !== undefined ? images : [];
  	mapping = mapping !== undefined ? mapping : CubeReflectionMapping;

  	Texture.call( this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

  	this.flipY = false;

  };

  CubeTexture.prototype = Object.create( Texture.prototype );
  CubeTexture.prototype.constructor = CubeTexture;

  CubeTexture.prototype.isCubeTexture = true;

  Object.defineProperty( CubeTexture.prototype, 'images', {

  	get: function () {

  		return this.image;

  	},

  	set: function ( value ) {

  		this.image = value;

  	}

  } );

  /**
   *
   * Uniforms of a program.
   * Those form a tree structure with a special top-level container for the root,
   * which you get by calling 'new WebGLUniforms( gl, program, renderer )'.
   *
   *
   * Properties of inner nodes including the top-level container:
   *
   * .seq - array of nested uniforms
   * .map - nested uniforms by name
   *
   *
   * Methods of all nodes except the top-level container:
   *
   * .setValue( gl, value, [renderer] )
   *
   * 		uploads a uniform value(s)
   *  	the 'renderer' parameter is needed for sampler uniforms
   *
   *
   * Static methods of the top-level container (renderer factorizations):
   *
   * .upload( gl, seq, values, renderer )
   *
   * 		sets uniforms in 'seq' to 'values[id].value'
   *
   * .seqWithValue( seq, values ) : filteredSeq
   *
   * 		filters 'seq' entries with corresponding entry in values
   *
   * .splitDynamic( seq, values ) : filteredSeq
   *
   * 		filters 'seq' entries with dynamic entry and removes them from 'seq'
   *
   *
   * Methods of the top-level container (renderer factorizations):
   *
   * .setValue( gl, name, value )
   *
   * 		sets uniform with  name 'name' to 'value'
   *
   * .set( gl, obj, prop )
   *
   * 		sets uniform from object and property with same name than uniform
   *
   * .setOptional( gl, obj, prop )
   *
   * 		like .set for an optional property of the object
   *
   *
   * @author tschw
   *
   */

  exports.WebGLUniforms = ( function() { // scope

  	var emptyTexture = new Texture();
  	var emptyCubeTexture = new CubeTexture();

  	// --- Base for inner nodes (including the root) ---

  	var UniformContainer = function() {

  			this.seq = [];
  			this.map = {};

  		},

  	// --- Utilities ---

  	// Array Caches (provide typed arrays for temporary by size)

  		arrayCacheF32 = [],
  		arrayCacheI32 = [],

  	// Flattening for arrays of vectors and matrices

  		flatten = function( array, nBlocks, blockSize ) {

  			var firstElem = array[ 0 ];

  			if ( firstElem <= 0 || firstElem > 0 ) return array;
  			// unoptimized: ! isNaN( firstElem )
  			// see http://jacksondunstan.com/articles/983

  			var n = nBlocks * blockSize,
  				r = arrayCacheF32[ n ];

  			if ( r === undefined ) {

  				r = new Float32Array( n );
  				arrayCacheF32[ n ] = r;

  			}

  			if ( nBlocks !== 0 ) {

  				firstElem.toArray( r, 0 );

  				for ( var i = 1, offset = 0; i !== nBlocks; ++ i ) {

  					offset += blockSize;
  					array[ i ].toArray( r, offset );

  				}

  			}

  			return r;

  		},

  	// Texture unit allocation

  		allocTexUnits = function( renderer, n ) {

  			var r = arrayCacheI32[ n ];

  			if ( r === undefined ) {

  				r = new Int32Array( n );
  				arrayCacheI32[ n ] = r;

  			}

  			for ( var i = 0; i !== n; ++ i )
  				r[ i ] = renderer.allocTextureUnit();

  			return r;

  		},

  	// --- Setters ---

  	// Note: Defining these methods externally, because they come in a bunch
  	// and this way their names minify.

  		// Single scalar

  		setValue1f = function( gl, v ) { gl.uniform1f( this.addr, v ); },
  		setValue1i = function( gl, v ) { gl.uniform1i( this.addr, v ); },

  		// Single float vector (from flat array or THREE.VectorN)

  		setValue2fv = function( gl, v ) {

  			if ( v.x === undefined ) gl.uniform2fv( this.addr, v );
  			else gl.uniform2f( this.addr, v.x, v.y );

  		},

  		setValue3fv = function( gl, v ) {

  			if ( v.x !== undefined )
  				gl.uniform3f( this.addr, v.x, v.y, v.z );
  			else if ( v.r !== undefined )
  				gl.uniform3f( this.addr, v.r, v.g, v.b );
  			else
  				gl.uniform3fv( this.addr, v );

  		},

  		setValue4fv = function( gl, v ) {

  			if ( v.x === undefined ) gl.uniform4fv( this.addr, v );
  			else gl.uniform4f( this.addr, v.x, v.y, v.z, v.w );

  		},

  		// Single matrix (from flat array or MatrixN)

  		setValue2fm = function( gl, v ) {

  			gl.uniformMatrix2fv( this.addr, false, v.elements || v );

  		},

  		setValue3fm = function( gl, v ) {

  			gl.uniformMatrix3fv( this.addr, false, v.elements || v );

  		},

  		setValue4fm = function( gl, v ) {

  			gl.uniformMatrix4fv( this.addr, false, v.elements || v );

  		},

  		// Single texture (2D / Cube)

  		setValueT1 = function( gl, v, renderer ) {

  			var unit = renderer.allocTextureUnit();
  			gl.uniform1i( this.addr, unit );
  			renderer.setTexture2D( v || emptyTexture, unit );

  		},

  		setValueT6 = function( gl, v, renderer ) {

  			var unit = renderer.allocTextureUnit();
  			gl.uniform1i( this.addr, unit );
  			renderer.setTextureCube( v || emptyCubeTexture, unit );

  		},

  		// Integer / Boolean vectors or arrays thereof (always flat arrays)

  		setValue2iv = function( gl, v ) { gl.uniform2iv( this.addr, v ); },
  		setValue3iv = function( gl, v ) { gl.uniform3iv( this.addr, v ); },
  		setValue4iv = function( gl, v ) { gl.uniform4iv( this.addr, v ); },

  		// Helper to pick the right setter for the singular case

  		getSingularSetter = function( type ) {

  			switch ( type ) {

  				case 0x1406: return setValue1f; // FLOAT
  				case 0x8b50: return setValue2fv; // _VEC2
  				case 0x8b51: return setValue3fv; // _VEC3
  				case 0x8b52: return setValue4fv; // _VEC4

  				case 0x8b5a: return setValue2fm; // _MAT2
  				case 0x8b5b: return setValue3fm; // _MAT3
  				case 0x8b5c: return setValue4fm; // _MAT4

  				case 0x8b5e: return setValueT1; // SAMPLER_2D
  				case 0x8b60: return setValueT6; // SAMPLER_CUBE

  				case 0x1404: case 0x8b56: return setValue1i; // INT, BOOL
  				case 0x8b53: case 0x8b57: return setValue2iv; // _VEC2
  				case 0x8b54: case 0x8b58: return setValue3iv; // _VEC3
  				case 0x8b55: case 0x8b59: return setValue4iv; // _VEC4

  			}

  		},

  		// Array of scalars

  		setValue1fv = function( gl, v ) { gl.uniform1fv( this.addr, v ); },
  		setValue1iv = function( gl, v ) { gl.uniform1iv( this.addr, v ); },

  		// Array of vectors (flat or from THREE classes)

  		setValueV2a = function( gl, v ) {

  			gl.uniform2fv( this.addr, flatten( v, this.size, 2 ) );

  		},

  		setValueV3a = function( gl, v ) {

  			gl.uniform3fv( this.addr, flatten( v, this.size, 3 ) );

  		},

  		setValueV4a = function( gl, v ) {

  			gl.uniform4fv( this.addr, flatten( v, this.size, 4 ) );

  		},

  		// Array of matrices (flat or from THREE clases)

  		setValueM2a = function( gl, v ) {

  			gl.uniformMatrix2fv( this.addr, false, flatten( v, this.size, 4 ) );

  		},

  		setValueM3a = function( gl, v ) {

  			gl.uniformMatrix3fv( this.addr, false, flatten( v, this.size, 9 ) );

  		},

  		setValueM4a = function( gl, v ) {

  			gl.uniformMatrix4fv( this.addr, false, flatten( v, this.size, 16 ) );

  		},

  		// Array of textures (2D / Cube)

  		setValueT1a = function( gl, v, renderer ) {

  			var n = v.length,
  				units = allocTexUnits( renderer, n );

  			gl.uniform1iv( this.addr, units );

  			for ( var i = 0; i !== n; ++ i ) {

  				renderer.setTexture2D( v[ i ] || emptyTexture, units[ i ] );

  			}

  		},

  		setValueT6a = function( gl, v, renderer ) {

  			var n = v.length,
  				units = allocTexUnits( renderer, n );

  			gl.uniform1iv( this.addr, units );

  			for ( var i = 0; i !== n; ++ i ) {

  				renderer.setTextureCube( v[ i ] || emptyCubeTexture, units[ i ] );

  			}

  		},


  		// Helper to pick the right setter for a pure (bottom-level) array

  		getPureArraySetter = function( type ) {

  			switch ( type ) {

  				case 0x1406: return setValue1fv; // FLOAT
  				case 0x8b50: return setValueV2a; // _VEC2
  				case 0x8b51: return setValueV3a; // _VEC3
  				case 0x8b52: return setValueV4a; // _VEC4

  				case 0x8b5a: return setValueM2a; // _MAT2
  				case 0x8b5b: return setValueM3a; // _MAT3
  				case 0x8b5c: return setValueM4a; // _MAT4

  				case 0x8b5e: return setValueT1a; // SAMPLER_2D
  				case 0x8b60: return setValueT6a; // SAMPLER_CUBE

  				case 0x1404: case 0x8b56: return setValue1iv; // INT, BOOL
  				case 0x8b53: case 0x8b57: return setValue2iv; // _VEC2
  				case 0x8b54: case 0x8b58: return setValue3iv; // _VEC3
  				case 0x8b55: case 0x8b59: return setValue4iv; // _VEC4

  			}

  		},

  	// --- Uniform Classes ---

  		SingleUniform = function SingleUniform( id, activeInfo, addr ) {

  			this.id = id;
  			this.addr = addr;
  			this.setValue = getSingularSetter( activeInfo.type );

  			// this.path = activeInfo.name; // DEBUG

  		},

  		PureArrayUniform = function( id, activeInfo, addr ) {

  			this.id = id;
  			this.addr = addr;
  			this.size = activeInfo.size;
  			this.setValue = getPureArraySetter( activeInfo.type );

  			// this.path = activeInfo.name; // DEBUG

  		},

  		StructuredUniform = function( id ) {

  			this.id = id;

  			UniformContainer.call( this ); // mix-in

  		};

  	StructuredUniform.prototype.setValue = function( gl, value ) {

  		// Note: Don't need an extra 'renderer' parameter, since samplers
  		// are not allowed in structured uniforms.

  		var seq = this.seq;

  		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

  			var u = seq[ i ];
  			u.setValue( gl, value[ u.id ] );

  		}

  	};

  	// --- Top-level ---

  	// Parser - builds up the property tree from the path strings

  	var RePathPart = /([\w\d_]+)(\])?(\[|\.)?/g,
  		// extracts
  		// 	- the identifier (member name or array index)
  		//  - followed by an optional right bracket (found when array index)
  		//  - followed by an optional left bracket or dot (type of subscript)
  		//
  		// Note: These portions can be read in a non-overlapping fashion and
  		// allow straightforward parsing of the hierarchy that WebGL encodes
  		// in the uniform names.

  		addUniform = function( container, uniformObject ) {

  			container.seq.push( uniformObject );
  			container.map[ uniformObject.id ] = uniformObject;

  		},

  		parseUniform = function( activeInfo, addr, container ) {

  			var path = activeInfo.name,
  				pathLength = path.length;

  			// reset RegExp object, because of the early exit of a previous run
  			RePathPart.lastIndex = 0;

  			for (; ;) {

  				var match = RePathPart.exec( path ),
  					matchEnd = RePathPart.lastIndex,

  					id = match[ 1 ],
  					idIsIndex = match[ 2 ] === ']',
  					subscript = match[ 3 ];

  				if ( idIsIndex ) id = id | 0; // convert to integer

  				if ( subscript === undefined ||
  						subscript === '[' && matchEnd + 2 === pathLength ) {
  					// bare name or "pure" bottom-level array "[0]" suffix

  					addUniform( container, subscript === undefined ?
  							new SingleUniform( id, activeInfo, addr ) :
  							new PureArrayUniform( id, activeInfo, addr ) );

  					break;

  				} else {
  					// step into inner node / create it in case it doesn't exist

  					var map = container.map,
  						next = map[ id ];

  					if ( next === undefined ) {

  						next = new StructuredUniform( id );
  						addUniform( container, next );

  					}

  					container = next;

  				}

  			}

  		},

  	// Root Container

  		WebGLUniforms = function WebGLUniforms( gl, program, renderer ) {

  			UniformContainer.call( this );

  			this.renderer = renderer;

  			var n = gl.getProgramParameter( program, gl.ACTIVE_UNIFORMS );

  			for ( var i = 0; i !== n; ++ i ) {

  				var info = gl.getActiveUniform( program, i ),
  					path = info.name,
  					addr = gl.getUniformLocation( program, path );

  				parseUniform( info, addr, this );

  			}

  		};


  	WebGLUniforms.prototype.setValue = function( gl, name, value ) {

  		var u = this.map[ name ];

  		if ( u !== undefined ) u.setValue( gl, value, this.renderer );

  	};

  	WebGLUniforms.prototype.set = function( gl, object, name ) {

  		var u = this.map[ name ];

  		if ( u !== undefined ) u.setValue( gl, object[ name ], this.renderer );

  	};

  	WebGLUniforms.prototype.setOptional = function( gl, object, name ) {

  		var v = object[ name ];

  		if ( v !== undefined ) this.setValue( gl, name, v );

  	};


  	// Static interface

  	WebGLUniforms.upload = function( gl, seq, values, renderer ) {

  		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

  			var u = seq[ i ],
  				v = values[ u.id ];

  			if ( v.needsUpdate !== false ) {
  				// note: always updating when .needsUpdate is undefined

  				u.setValue( gl, v.value, renderer );

  			}

  		}

  	};

  	WebGLUniforms.seqWithValue = function( seq, values ) {

  		var r = [];

  		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

  			var u = seq[ i ];
  			if ( u.id in values ) r.push( u );

  		}

  		return r;

  	};

  	WebGLUniforms.splitDynamic = function( seq, values ) {

  		var r = null,
  			n = seq.length,
  			w = 0;

  		for ( var i = 0; i !== n; ++ i ) {

  			var u = seq[ i ],
  				v = values[ u.id ];

  			if ( v && v.dynamic === true ) {

  				if ( r === null ) r = [];
  				r.push( u );

  			} else {

  				// in-place compact 'seq', removing the matches
  				if ( w < i ) seq[ w ] = u;
  				++ w;

  			}

  		}

  		if ( w < n ) seq.length = w;

  		return r;

  	};

  	WebGLUniforms.evalDynamic = function( seq, values, object, camera ) {

  		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

  			var v = values[ seq[ i ].id ],
  				f = v.onUpdateCallback;

  			if ( f !== undefined ) f.call( v, object, camera );

  		}

  	};

  	return WebGLUniforms;

  } )();

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLTextures( _gl, extensions, state, properties, capabilities, paramThreeToGL, info ) {

  	var _infoMemory = info.memory;
  	var _isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && _gl instanceof WebGL2RenderingContext );

  	//

  	function clampToMaxSize( image, maxSize ) {

  		if ( image.width > maxSize || image.height > maxSize ) {

  			// Warning: Scaling through the canvas will only work with images that use
  			// premultiplied alpha.

  			var scale = maxSize / Math.max( image.width, image.height );

  			var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
  			canvas.width = Math.floor( image.width * scale );
  			canvas.height = Math.floor( image.height * scale );

  			var context = canvas.getContext( '2d' );
  			context.drawImage( image, 0, 0, image.width, image.height, 0, 0, canvas.width, canvas.height );

  			console.warn( 'THREE.WebGLRenderer: image is too big (' + image.width + 'x' + image.height + '). Resized to ' + canvas.width + 'x' + canvas.height, image );

  			return canvas;

  		}

  		return image;

  	}

  	function isPowerOfTwo( image ) {

  		return exports.Math.isPowerOfTwo( image.width ) && exports.Math.isPowerOfTwo( image.height );

  	}

  	function makePowerOfTwo( image ) {

  		if ( image instanceof HTMLImageElement || image instanceof HTMLCanvasElement ) {

  			var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
  			canvas.width = exports.Math.nearestPowerOfTwo( image.width );
  			canvas.height = exports.Math.nearestPowerOfTwo( image.height );

  			var context = canvas.getContext( '2d' );
  			context.drawImage( image, 0, 0, canvas.width, canvas.height );

  			console.warn( 'THREE.WebGLRenderer: image is not power of two (' + image.width + 'x' + image.height + '). Resized to ' + canvas.width + 'x' + canvas.height, image );

  			return canvas;

  		}

  		return image;

  	}

  	function textureNeedsPowerOfTwo( texture ) {

  		if ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) return true;
  		if ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) return true;

  		return false;

  	}

  	// Fallback filters for non-power-of-2 textures

  	function filterFallback( f ) {

  		if ( f === NearestFilter || f === NearestMipMapNearestFilter || f === NearestMipMapLinearFilter ) {

  			return _gl.NEAREST;

  		}

  		return _gl.LINEAR;

  	}

  	//

  	function onTextureDispose( event ) {

  		var texture = event.target;

  		texture.removeEventListener( 'dispose', onTextureDispose );

  		deallocateTexture( texture );

  		_infoMemory.textures --;


  	}

  	function onRenderTargetDispose( event ) {

  		var renderTarget = event.target;

  		renderTarget.removeEventListener( 'dispose', onRenderTargetDispose );

  		deallocateRenderTarget( renderTarget );

  		_infoMemory.textures --;

  	}

  	//

  	function deallocateTexture( texture ) {

  		var textureProperties = properties.get( texture );

  		if ( texture.image && textureProperties.__image__webglTextureCube ) {

  			// cube texture

  			_gl.deleteTexture( textureProperties.__image__webglTextureCube );

  		} else {

  			// 2D texture

  			if ( textureProperties.__webglInit === undefined ) return;

  			_gl.deleteTexture( textureProperties.__webglTexture );

  		}

  		// remove all webgl properties
  		properties.delete( texture );

  	}

  	function deallocateRenderTarget( renderTarget ) {

  		var renderTargetProperties = properties.get( renderTarget );
  		var textureProperties = properties.get( renderTarget.texture );

  		if ( ! renderTarget ) return;

  		if ( textureProperties.__webglTexture !== undefined ) {

  			_gl.deleteTexture( textureProperties.__webglTexture );

  		}

  		if ( renderTarget.depthTexture ) {

  			renderTarget.depthTexture.dispose();

  		}

  		if ( (renderTarget && renderTarget.isWebGLRenderTargetCube) ) {

  			for ( var i = 0; i < 6; i ++ ) {

  				_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );
  				if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );

  			}

  		} else {

  			_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );
  			if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );

  		}

  		properties.delete( renderTarget.texture );
  		properties.delete( renderTarget );

  	}

  	//



  	function setTexture2D( texture, slot ) {

  		var textureProperties = properties.get( texture );

  		if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

  			var image = texture.image;

  			if ( image === undefined ) {

  				console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is undefined', texture );

  			} else if ( image.complete === false ) {

  				console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete', texture );

  			} else {

  				uploadTexture( textureProperties, texture, slot );
  				return;

  			}

  		}

  		state.activeTexture( _gl.TEXTURE0 + slot );
  		state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );

  	}

  	function setTextureCube( texture, slot ) {

  		var textureProperties = properties.get( texture );

  		if ( texture.image.length === 6 ) {

  			if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

  				if ( ! textureProperties.__image__webglTextureCube ) {

  					texture.addEventListener( 'dispose', onTextureDispose );

  					textureProperties.__image__webglTextureCube = _gl.createTexture();

  					_infoMemory.textures ++;

  				}

  				state.activeTexture( _gl.TEXTURE0 + slot );
  				state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__image__webglTextureCube );

  				_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );

  				var isCompressed = (texture && texture.isCompressedTexture);
  				var isDataTexture = (texture.image[ 0 ] && texture.image[ 0 ].isDataTexture);

  				var cubeImage = [];

  				for ( var i = 0; i < 6; i ++ ) {

  					if ( ! isCompressed && ! isDataTexture ) {

  						cubeImage[ i ] = clampToMaxSize( texture.image[ i ], capabilities.maxCubemapSize );

  					} else {

  						cubeImage[ i ] = isDataTexture ? texture.image[ i ].image : texture.image[ i ];

  					}

  				}

  				var image = cubeImage[ 0 ],
  				isPowerOfTwoImage = isPowerOfTwo( image ),
  				glFormat = paramThreeToGL( texture.format ),
  				glType = paramThreeToGL( texture.type );

  				setTextureParameters( _gl.TEXTURE_CUBE_MAP, texture, isPowerOfTwoImage );

  				for ( var i = 0; i < 6; i ++ ) {

  					if ( ! isCompressed ) {

  						if ( isDataTexture ) {

  							state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, cubeImage[ i ].width, cubeImage[ i ].height, 0, glFormat, glType, cubeImage[ i ].data );

  						} else {

  							state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, glFormat, glType, cubeImage[ i ] );

  						}

  					} else {

  						var mipmap, mipmaps = cubeImage[ i ].mipmaps;

  						for ( var j = 0, jl = mipmaps.length; j < jl; j ++ ) {

  							mipmap = mipmaps[ j ];

  							if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {

  								if ( state.getCompressedTextureFormats().indexOf( glFormat ) > - 1 ) {

  									state.compressedTexImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );

  								} else {

  									console.warn( "THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()" );

  								}

  							} else {

  								state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

  							}

  						}

  					}

  				}

  				if ( texture.generateMipmaps && isPowerOfTwoImage ) {

  					_gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );

  				}

  				textureProperties.__version = texture.version;

  				if ( texture.onUpdate ) texture.onUpdate( texture );

  			} else {

  				state.activeTexture( _gl.TEXTURE0 + slot );
  				state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__image__webglTextureCube );

  			}

  		}

  	}

  	function setTextureCubeDynamic( texture, slot ) {

  		state.activeTexture( _gl.TEXTURE0 + slot );
  		state.bindTexture( _gl.TEXTURE_CUBE_MAP, properties.get( texture ).__webglTexture );

  	}

  	function setTextureParameters( textureType, texture, isPowerOfTwoImage ) {

  		var extension;

  		if ( isPowerOfTwoImage ) {

  			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, paramThreeToGL( texture.wrapS ) );
  			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, paramThreeToGL( texture.wrapT ) );

  			_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, paramThreeToGL( texture.magFilter ) );
  			_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, paramThreeToGL( texture.minFilter ) );

  		} else {

  			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
  			_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );

  			if ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) {

  				console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.', texture );

  			}

  			_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, filterFallback( texture.magFilter ) );
  			_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, filterFallback( texture.minFilter ) );

  			if ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) {

  				console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.', texture );

  			}

  		}

  		extension = extensions.get( 'EXT_texture_filter_anisotropic' );

  		if ( extension ) {

  			if ( texture.type === FloatType && extensions.get( 'OES_texture_float_linear' ) === null ) return;
  			if ( texture.type === HalfFloatType && extensions.get( 'OES_texture_half_float_linear' ) === null ) return;

  			if ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {

  				_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );
  				properties.get( texture ).__currentAnisotropy = texture.anisotropy;

  			}

  		}

  	}

  	function uploadTexture( textureProperties, texture, slot ) {

  		if ( textureProperties.__webglInit === undefined ) {

  			textureProperties.__webglInit = true;

  			texture.addEventListener( 'dispose', onTextureDispose );

  			textureProperties.__webglTexture = _gl.createTexture();

  			_infoMemory.textures ++;

  		}

  		state.activeTexture( _gl.TEXTURE0 + slot );
  		state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );

  		_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
  		_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
  		_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );

  		var image = clampToMaxSize( texture.image, capabilities.maxTextureSize );

  		if ( textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( image ) === false ) {

  			image = makePowerOfTwo( image );

  		}

  		var isPowerOfTwoImage = isPowerOfTwo( image ),
  		glFormat = paramThreeToGL( texture.format ),
  		glType = paramThreeToGL( texture.type );

  		setTextureParameters( _gl.TEXTURE_2D, texture, isPowerOfTwoImage );

  		var mipmap, mipmaps = texture.mipmaps;

  		if ( (texture && texture.isDepthTexture) ) {

  			// populate depth texture with dummy data

  			var internalFormat = _gl.DEPTH_COMPONENT;

  			if ( texture.type === FloatType ) {

  				if ( !_isWebGL2 ) throw new Error('Float Depth Texture only supported in WebGL2.0');
  				internalFormat = _gl.DEPTH_COMPONENT32F;

  			} else if ( _isWebGL2 ) {

  				// WebGL 2.0 requires signed internalformat for glTexImage2D
  				internalFormat = _gl.DEPTH_COMPONENT16;

  			}

  			state.texImage2D( _gl.TEXTURE_2D, 0, internalFormat, image.width, image.height, 0, glFormat, glType, null );

  		} else if ( (texture && texture.isDataTexture) ) {

  			// use manually created mipmaps if available
  			// if there are no manual mipmaps
  			// set 0 level mipmap and then use GL to generate other mipmap levels

  			if ( mipmaps.length > 0 && isPowerOfTwoImage ) {

  				for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

  					mipmap = mipmaps[ i ];
  					state.texImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

  				}

  				texture.generateMipmaps = false;

  			} else {

  				state.texImage2D( _gl.TEXTURE_2D, 0, glFormat, image.width, image.height, 0, glFormat, glType, image.data );

  			}

  		} else if ( (texture && texture.isCompressedTexture) ) {

  			for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

  				mipmap = mipmaps[ i ];

  				if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {

  					if ( state.getCompressedTextureFormats().indexOf( glFormat ) > - 1 ) {

  						state.compressedTexImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );

  					} else {

  						console.warn( "THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()" );

  					}

  				} else {

  					state.texImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

  				}

  			}

  		} else {

  			// regular Texture (image, video, canvas)

  			// use manually created mipmaps if available
  			// if there are no manual mipmaps
  			// set 0 level mipmap and then use GL to generate other mipmap levels

  			if ( mipmaps.length > 0 && isPowerOfTwoImage ) {

  				for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

  					mipmap = mipmaps[ i ];
  					state.texImage2D( _gl.TEXTURE_2D, i, glFormat, glFormat, glType, mipmap );

  				}

  				texture.generateMipmaps = false;

  			} else {

  				state.texImage2D( _gl.TEXTURE_2D, 0, glFormat, glFormat, glType, image );

  			}

  		}

  		if ( texture.generateMipmaps && isPowerOfTwoImage ) _gl.generateMipmap( _gl.TEXTURE_2D );

  		textureProperties.__version = texture.version;

  		if ( texture.onUpdate ) texture.onUpdate( texture );

  	}

  	// Render targets

  	// Setup storage for target texture and bind it to correct framebuffer
  	function setupFrameBufferTexture( framebuffer, renderTarget, attachment, textureTarget ) {

  		var glFormat = paramThreeToGL( renderTarget.texture.format );
  		var glType = paramThreeToGL( renderTarget.texture.type );
  		state.texImage2D( textureTarget, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );
  		_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
  		_gl.framebufferTexture2D( _gl.FRAMEBUFFER, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );
  		_gl.bindFramebuffer( _gl.FRAMEBUFFER, null );

  	}

  	// Setup storage for internal depth/stencil buffers and bind to correct framebuffer
  	function setupRenderBufferStorage( renderbuffer, renderTarget ) {

  		_gl.bindRenderbuffer( _gl.RENDERBUFFER, renderbuffer );

  		if ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {

  			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_COMPONENT16, renderTarget.width, renderTarget.height );
  			_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );

  		} else if ( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {

  			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_STENCIL, renderTarget.width, renderTarget.height );
  			_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );

  		} else {

  			// FIXME: We don't support !depth !stencil
  			_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.RGBA4, renderTarget.width, renderTarget.height );

  		}

  		_gl.bindRenderbuffer( _gl.RENDERBUFFER, null );

  	}

  	// Setup resources for a Depth Texture for a FBO (needs an extension)
  	function setupDepthTexture( framebuffer, renderTarget ) {

  		var isCube = ( (renderTarget && renderTarget.isWebGLRenderTargetCube) );
  		if ( isCube ) throw new Error('Depth Texture with cube render targets is not supported!');

  		_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );

  		if ( !( (renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture) ) ) {

  			throw new Error('renderTarget.depthTexture must be an instance of THREE.DepthTexture');

  		}

  		// upload an empty depth texture with framebuffer size
  		if ( !properties.get( renderTarget.depthTexture ).__webglTexture ||
  				renderTarget.depthTexture.image.width !== renderTarget.width ||
  				renderTarget.depthTexture.image.height !== renderTarget.height ) {
  			renderTarget.depthTexture.image.width = renderTarget.width;
  			renderTarget.depthTexture.image.height = renderTarget.height;
  			renderTarget.depthTexture.needsUpdate = true;
  		}

  		setTexture2D( renderTarget.depthTexture, 0 );

  		var webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture;
  		_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0 );

  	}

  	// Setup GL resources for a non-texture depth buffer
  	function setupDepthRenderbuffer( renderTarget ) {

  		var renderTargetProperties = properties.get( renderTarget );

  		var isCube = ( (renderTarget && renderTarget.isWebGLRenderTargetCube) );

  		if ( renderTarget.depthTexture ) {

  			if ( isCube ) throw new Error('target.depthTexture not supported in Cube render targets');

  			setupDepthTexture( renderTargetProperties.__webglFramebuffer, renderTarget );

  		} else {

  			if ( isCube ) {

  				renderTargetProperties.__webglDepthbuffer = [];

  				for ( var i = 0; i < 6; i ++ ) {

  					_gl.bindFramebuffer( _gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer[ i ] );
  					renderTargetProperties.__webglDepthbuffer[ i ] = _gl.createRenderbuffer();
  					setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer[ i ], renderTarget );

  				}

  			} else {

  				_gl.bindFramebuffer( _gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer );
  				renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
  				setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer, renderTarget );

  			}

  		}

  		_gl.bindFramebuffer( _gl.FRAMEBUFFER, null );

  	}

  	// Set up GL resources for the render target
  	function setupRenderTarget( renderTarget ) {

  		var renderTargetProperties = properties.get( renderTarget );
  		var textureProperties = properties.get( renderTarget.texture );

  		renderTarget.addEventListener( 'dispose', onRenderTargetDispose );

  		textureProperties.__webglTexture = _gl.createTexture();

  		_infoMemory.textures ++;

  		var isCube = ( (renderTarget && renderTarget.isWebGLRenderTargetCube) );
  		var isTargetPowerOfTwo = isPowerOfTwo( renderTarget );

  		// Setup framebuffer

  		if ( isCube ) {

  			renderTargetProperties.__webglFramebuffer = [];

  			for ( var i = 0; i < 6; i ++ ) {

  				renderTargetProperties.__webglFramebuffer[ i ] = _gl.createFramebuffer();

  			}

  		} else {

  			renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();

  		}

  		// Setup color buffer

  		if ( isCube ) {

  			state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture );
  			setTextureParameters( _gl.TEXTURE_CUBE_MAP, renderTarget.texture, isTargetPowerOfTwo );

  			for ( var i = 0; i < 6; i ++ ) {

  				setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer[ i ], renderTarget, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i );

  			}

  			if ( renderTarget.texture.generateMipmaps && isTargetPowerOfTwo ) _gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );
  			state.bindTexture( _gl.TEXTURE_CUBE_MAP, null );

  		} else {

  			state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );
  			setTextureParameters( _gl.TEXTURE_2D, renderTarget.texture, isTargetPowerOfTwo );
  			setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D );

  			if ( renderTarget.texture.generateMipmaps && isTargetPowerOfTwo ) _gl.generateMipmap( _gl.TEXTURE_2D );
  			state.bindTexture( _gl.TEXTURE_2D, null );

  		}

  		// Setup depth and stencil buffers

  		if ( renderTarget.depthBuffer ) {

  			setupDepthRenderbuffer( renderTarget );

  		}

  	}

  	function updateRenderTargetMipmap( renderTarget ) {

  		var texture = renderTarget.texture;

  		if ( texture.generateMipmaps && isPowerOfTwo( renderTarget ) &&
  				texture.minFilter !== NearestFilter &&
  				texture.minFilter !== LinearFilter ) {

  			var target = (renderTarget && renderTarget.isWebGLRenderTargetCube) ? _gl.TEXTURE_CUBE_MAP : _gl.TEXTURE_2D;
  			var webglTexture = properties.get( texture ).__webglTexture;

  			state.bindTexture( target, webglTexture );
  			_gl.generateMipmap( target );
  			state.bindTexture( target, null );

  		}

  	}

  	this.setTexture2D = setTexture2D;
  	this.setTextureCube = setTextureCube;
  	this.setTextureCubeDynamic = setTextureCubeDynamic;
  	this.setupRenderTarget = setupRenderTarget;
  	this.updateRenderTargetMipmap = updateRenderTargetMipmap;

  };

  /**
   * @author supereggbert / http://www.paulbrunt.co.uk/
   * @author philogb / http://blog.thejit.org/
   * @author mikael emtinger / http://gomo.se/
   * @author egraether / http://egraether.com/
   * @author WestLangley / http://github.com/WestLangley
   */

  function Vector4( x, y, z, w ) {

  	this.x = x || 0;
  	this.y = y || 0;
  	this.z = z || 0;
  	this.w = ( w !== undefined ) ? w : 1;

  };

  Vector4.prototype = {

  	constructor: Vector4,

  	isVector4: true,

  	set: function ( x, y, z, w ) {

  		this.x = x;
  		this.y = y;
  		this.z = z;
  		this.w = w;

  		return this;

  	},

  	setScalar: function ( scalar ) {

  		this.x = scalar;
  		this.y = scalar;
  		this.z = scalar;
  		this.w = scalar;

  		return this;

  	},

  	setX: function ( x ) {

  		this.x = x;

  		return this;

  	},

  	setY: function ( y ) {

  		this.y = y;

  		return this;

  	},

  	setZ: function ( z ) {

  		this.z = z;

  		return this;

  	},

  	setW: function ( w ) {

  		this.w = w;

  		return this;

  	},

  	setComponent: function ( index, value ) {

  		switch ( index ) {

  			case 0: this.x = value; break;
  			case 1: this.y = value; break;
  			case 2: this.z = value; break;
  			case 3: this.w = value; break;
  			default: throw new Error( 'index is out of range: ' + index );

  		}

  	},

  	getComponent: function ( index ) {

  		switch ( index ) {

  			case 0: return this.x;
  			case 1: return this.y;
  			case 2: return this.z;
  			case 3: return this.w;
  			default: throw new Error( 'index is out of range: ' + index );

  		}

  	},

  	clone: function () {

  		return new this.constructor( this.x, this.y, this.z, this.w );

  	},

  	copy: function ( v ) {

  		this.x = v.x;
  		this.y = v.y;
  		this.z = v.z;
  		this.w = ( v.w !== undefined ) ? v.w : 1;

  		return this;

  	},

  	add: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
  			return this.addVectors( v, w );

  		}

  		this.x += v.x;
  		this.y += v.y;
  		this.z += v.z;
  		this.w += v.w;

  		return this;

  	},

  	addScalar: function ( s ) {

  		this.x += s;
  		this.y += s;
  		this.z += s;
  		this.w += s;

  		return this;

  	},

  	addVectors: function ( a, b ) {

  		this.x = a.x + b.x;
  		this.y = a.y + b.y;
  		this.z = a.z + b.z;
  		this.w = a.w + b.w;

  		return this;

  	},

  	addScaledVector: function ( v, s ) {

  		this.x += v.x * s;
  		this.y += v.y * s;
  		this.z += v.z * s;
  		this.w += v.w * s;

  		return this;

  	},

  	sub: function ( v, w ) {

  		if ( w !== undefined ) {

  			console.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
  			return this.subVectors( v, w );

  		}

  		this.x -= v.x;
  		this.y -= v.y;
  		this.z -= v.z;
  		this.w -= v.w;

  		return this;

  	},

  	subScalar: function ( s ) {

  		this.x -= s;
  		this.y -= s;
  		this.z -= s;
  		this.w -= s;

  		return this;

  	},

  	subVectors: function ( a, b ) {

  		this.x = a.x - b.x;
  		this.y = a.y - b.y;
  		this.z = a.z - b.z;
  		this.w = a.w - b.w;

  		return this;

  	},

  	multiplyScalar: function ( scalar ) {

  		if ( isFinite( scalar ) ) {

  			this.x *= scalar;
  			this.y *= scalar;
  			this.z *= scalar;
  			this.w *= scalar;

  		} else {

  			this.x = 0;
  			this.y = 0;
  			this.z = 0;
  			this.w = 0;

  		}

  		return this;

  	},

  	applyMatrix4: function ( m ) {

  		var x = this.x, y = this.y, z = this.z, w = this.w;
  		var e = m.elements;

  		this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w;
  		this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w;
  		this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w;
  		this.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w;

  		return this;

  	},

  	divideScalar: function ( scalar ) {

  		return this.multiplyScalar( 1 / scalar );

  	},

  	setAxisAngleFromQuaternion: function ( q ) {

  		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm

  		// q is assumed to be normalized

  		this.w = 2 * Math.acos( q.w );

  		var s = Math.sqrt( 1 - q.w * q.w );

  		if ( s < 0.0001 ) {

  			 this.x = 1;
  			 this.y = 0;
  			 this.z = 0;

  		} else {

  			 this.x = q.x / s;
  			 this.y = q.y / s;
  			 this.z = q.z / s;

  		}

  		return this;

  	},

  	setAxisAngleFromRotationMatrix: function ( m ) {

  		// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm

  		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

  		var angle, x, y, z,		// variables for result
  			epsilon = 0.01,		// margin to allow for rounding errors
  			epsilon2 = 0.1,		// margin to distinguish between 0 and 180 degrees

  			te = m.elements,

  			m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
  			m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
  			m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];

  		if ( ( Math.abs( m12 - m21 ) < epsilon ) &&
  		     ( Math.abs( m13 - m31 ) < epsilon ) &&
  		     ( Math.abs( m23 - m32 ) < epsilon ) ) {

  			// singularity found
  			// first check for identity matrix which must have +1 for all terms
  			// in leading diagonal and zero in other terms

  			if ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&
  			     ( Math.abs( m13 + m31 ) < epsilon2 ) &&
  			     ( Math.abs( m23 + m32 ) < epsilon2 ) &&
  			     ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {

  				// this singularity is identity matrix so angle = 0

  				this.set( 1, 0, 0, 0 );

  				return this; // zero angle, arbitrary axis

  			}

  			// otherwise this singularity is angle = 180

  			angle = Math.PI;

  			var xx = ( m11 + 1 ) / 2;
  			var yy = ( m22 + 1 ) / 2;
  			var zz = ( m33 + 1 ) / 2;
  			var xy = ( m12 + m21 ) / 4;
  			var xz = ( m13 + m31 ) / 4;
  			var yz = ( m23 + m32 ) / 4;

  			if ( ( xx > yy ) && ( xx > zz ) ) {

  				// m11 is the largest diagonal term

  				if ( xx < epsilon ) {

  					x = 0;
  					y = 0.707106781;
  					z = 0.707106781;

  				} else {

  					x = Math.sqrt( xx );
  					y = xy / x;
  					z = xz / x;

  				}

  			} else if ( yy > zz ) {

  				// m22 is the largest diagonal term

  				if ( yy < epsilon ) {

  					x = 0.707106781;
  					y = 0;
  					z = 0.707106781;

  				} else {

  					y = Math.sqrt( yy );
  					x = xy / y;
  					z = yz / y;

  				}

  			} else {

  				// m33 is the largest diagonal term so base result on this

  				if ( zz < epsilon ) {

  					x = 0.707106781;
  					y = 0.707106781;
  					z = 0;

  				} else {

  					z = Math.sqrt( zz );
  					x = xz / z;
  					y = yz / z;

  				}

  			}

  			this.set( x, y, z, angle );

  			return this; // return 180 deg rotation

  		}

  		// as we have reached here there are no singularities so we can handle normally

  		var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +
  		                   ( m13 - m31 ) * ( m13 - m31 ) +
  		                   ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize

  		if ( Math.abs( s ) < 0.001 ) s = 1;

  		// prevent divide by zero, should not happen if matrix is orthogonal and should be
  		// caught by singularity test above, but I've left it in just in case

  		this.x = ( m32 - m23 ) / s;
  		this.y = ( m13 - m31 ) / s;
  		this.z = ( m21 - m12 ) / s;
  		this.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );

  		return this;

  	},

  	min: function ( v ) {

  		this.x = Math.min( this.x, v.x );
  		this.y = Math.min( this.y, v.y );
  		this.z = Math.min( this.z, v.z );
  		this.w = Math.min( this.w, v.w );

  		return this;

  	},

  	max: function ( v ) {

  		this.x = Math.max( this.x, v.x );
  		this.y = Math.max( this.y, v.y );
  		this.z = Math.max( this.z, v.z );
  		this.w = Math.max( this.w, v.w );

  		return this;

  	},

  	clamp: function ( min, max ) {

  		// This function assumes min < max, if this assumption isn't true it will not operate correctly

  		this.x = Math.max( min.x, Math.min( max.x, this.x ) );
  		this.y = Math.max( min.y, Math.min( max.y, this.y ) );
  		this.z = Math.max( min.z, Math.min( max.z, this.z ) );
  		this.w = Math.max( min.w, Math.min( max.w, this.w ) );

  		return this;

  	},

  	clampScalar: function () {

  		var min, max;

  		return function clampScalar( minVal, maxVal ) {

  			if ( min === undefined ) {

  				min = new Vector4();
  				max = new Vector4();

  			}

  			min.set( minVal, minVal, minVal, minVal );
  			max.set( maxVal, maxVal, maxVal, maxVal );

  			return this.clamp( min, max );

  		};

  	}(),

  	floor: function () {

  		this.x = Math.floor( this.x );
  		this.y = Math.floor( this.y );
  		this.z = Math.floor( this.z );
  		this.w = Math.floor( this.w );

  		return this;

  	},

  	ceil: function () {

  		this.x = Math.ceil( this.x );
  		this.y = Math.ceil( this.y );
  		this.z = Math.ceil( this.z );
  		this.w = Math.ceil( this.w );

  		return this;

  	},

  	round: function () {

  		this.x = Math.round( this.x );
  		this.y = Math.round( this.y );
  		this.z = Math.round( this.z );
  		this.w = Math.round( this.w );

  		return this;

  	},

  	roundToZero: function () {

  		this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
  		this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
  		this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );
  		this.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w );

  		return this;

  	},

  	negate: function () {

  		this.x = - this.x;
  		this.y = - this.y;
  		this.z = - this.z;
  		this.w = - this.w;

  		return this;

  	},

  	dot: function ( v ) {

  		return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;

  	},

  	lengthSq: function () {

  		return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;

  	},

  	length: function () {

  		return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );

  	},

  	lengthManhattan: function () {

  		return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );

  	},

  	normalize: function () {

  		return this.divideScalar( this.length() );

  	},

  	setLength: function ( length ) {

  		return this.multiplyScalar( length / this.length() );

  	},

  	lerp: function ( v, alpha ) {

  		this.x += ( v.x - this.x ) * alpha;
  		this.y += ( v.y - this.y ) * alpha;
  		this.z += ( v.z - this.z ) * alpha;
  		this.w += ( v.w - this.w ) * alpha;

  		return this;

  	},

  	lerpVectors: function ( v1, v2, alpha ) {

  		return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );

  	},

  	equals: function ( v ) {

  		return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) );

  	},

  	fromArray: function ( array, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this.x = array[ offset ];
  		this.y = array[ offset + 1 ];
  		this.z = array[ offset + 2 ];
  		this.w = array[ offset + 3 ];

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		array[ offset ] = this.x;
  		array[ offset + 1 ] = this.y;
  		array[ offset + 2 ] = this.z;
  		array[ offset + 3 ] = this.w;

  		return array;

  	},

  	fromAttribute: function ( attribute, index, offset ) {

  		if ( offset === undefined ) offset = 0;

  		index = index * attribute.itemSize + offset;

  		this.x = attribute.array[ index ];
  		this.y = attribute.array[ index + 1 ];
  		this.z = attribute.array[ index + 2 ];
  		this.w = attribute.array[ index + 3 ];

  		return this;

  	}

  };

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLState( gl, extensions, paramThreeToGL ) {

  	var _this = this;

  	this.buffers = {
  		color: new WebGLColorBuffer( gl, this ),
  		depth: new WebGLDepthBuffer( gl, this ),
  		stencil: new WebGLStencilBuffer( gl, this )
  	};

  	var maxVertexAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
  	var newAttributes = new Uint8Array( maxVertexAttributes );
  	var enabledAttributes = new Uint8Array( maxVertexAttributes );
  	var attributeDivisors = new Uint8Array( maxVertexAttributes );

  	var capabilities = {};

  	var compressedTextureFormats = null;

  	var currentBlending = null;
  	var currentBlendEquation = null;
  	var currentBlendSrc = null;
  	var currentBlendDst = null;
  	var currentBlendEquationAlpha = null;
  	var currentBlendSrcAlpha = null;
  	var currentBlendDstAlpha = null;
  	var currentPremultipledAlpha = false;

  	var currentFlipSided = null;
  	var currentCullFace = null;

  	var currentLineWidth = null;

  	var currentPolygonOffsetFactor = null;
  	var currentPolygonOffsetUnits = null;

  	var currentScissorTest = null;

  	var maxTextures = gl.getParameter( gl.MAX_TEXTURE_IMAGE_UNITS );

  	var currentTextureSlot = null;
  	var currentBoundTextures = {};

  	var currentScissor = new Vector4();
  	var currentViewport = new Vector4();

  	function createTexture( type, target, count ) {

  		var data = new Uint8Array( 4 ); // 4 is required to match default unpack alignment of 4.
  		var texture = gl.createTexture();

  		gl.bindTexture( type, texture );
  		gl.texParameteri( type, gl.TEXTURE_MIN_FILTER, gl.NEAREST );
  		gl.texParameteri( type, gl.TEXTURE_MAG_FILTER, gl.NEAREST );

  		for ( var i = 0; i < count; i ++ ) {

  			gl.texImage2D( target + i, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );

  		}

  		return texture;

  	}

  	var emptyTextures = {};
  	emptyTextures[ gl.TEXTURE_2D ] = createTexture( gl.TEXTURE_2D, gl.TEXTURE_2D, 1 );
  	emptyTextures[ gl.TEXTURE_CUBE_MAP ] = createTexture( gl.TEXTURE_CUBE_MAP, gl.TEXTURE_CUBE_MAP_POSITIVE_X, 6 );

  	//

  	this.init = function () {

  		this.clearColor( 0, 0, 0, 1 );
  		this.clearDepth( 1 );
  		this.clearStencil( 0 );

  		this.enable( gl.DEPTH_TEST );
  		this.setDepthFunc( LessEqualDepth );

  		this.setFlipSided( false );
  		this.setCullFace( CullFaceBack );
  		this.enable( gl.CULL_FACE );

  		this.enable( gl.BLEND );
  		this.setBlending( NormalBlending );

  	};

  	this.initAttributes = function () {

  		for ( var i = 0, l = newAttributes.length; i < l; i ++ ) {

  			newAttributes[ i ] = 0;

  		}

  	};

  	this.enableAttribute = function ( attribute ) {

  		newAttributes[ attribute ] = 1;

  		if ( enabledAttributes[ attribute ] === 0 ) {

  			gl.enableVertexAttribArray( attribute );
  			enabledAttributes[ attribute ] = 1;

  		}

  		if ( attributeDivisors[ attribute ] !== 0 ) {

  			var extension = extensions.get( 'ANGLE_instanced_arrays' );

  			extension.vertexAttribDivisorANGLE( attribute, 0 );
  			attributeDivisors[ attribute ] = 0;

  		}

  	};

  	this.enableAttributeAndDivisor = function ( attribute, meshPerAttribute, extension ) {

  		newAttributes[ attribute ] = 1;

  		if ( enabledAttributes[ attribute ] === 0 ) {

  			gl.enableVertexAttribArray( attribute );
  			enabledAttributes[ attribute ] = 1;

  		}

  		if ( attributeDivisors[ attribute ] !== meshPerAttribute ) {

  			extension.vertexAttribDivisorANGLE( attribute, meshPerAttribute );
  			attributeDivisors[ attribute ] = meshPerAttribute;

  		}

  	};

  	this.disableUnusedAttributes = function () {

  		for ( var i = 0, l = enabledAttributes.length; i !== l; ++ i ) {

  			if ( enabledAttributes[ i ] !== newAttributes[ i ] ) {

  				gl.disableVertexAttribArray( i );
  				enabledAttributes[ i ] = 0;

  			}

  		}

  	};

  	this.enable = function ( id ) {

  		if ( capabilities[ id ] !== true ) {

  			gl.enable( id );
  			capabilities[ id ] = true;

  		}

  	};

  	this.disable = function ( id ) {

  		if ( capabilities[ id ] !== false ) {

  			gl.disable( id );
  			capabilities[ id ] = false;

  		}

  	};

  	this.getCompressedTextureFormats = function () {

  		if ( compressedTextureFormats === null ) {

  			compressedTextureFormats = [];

  			if ( extensions.get( 'WEBGL_compressed_texture_pvrtc' ) ||
  			     extensions.get( 'WEBGL_compressed_texture_s3tc' ) ||
  			     extensions.get( 'WEBGL_compressed_texture_etc1' ) ) {

  				var formats = gl.getParameter( gl.COMPRESSED_TEXTURE_FORMATS );

  				for ( var i = 0; i < formats.length; i ++ ) {

  					compressedTextureFormats.push( formats[ i ] );

  				}

  			}

  		}

  		return compressedTextureFormats;

  	};

  	this.setBlending = function ( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {

  		if ( blending !== NoBlending ) {

  			this.enable( gl.BLEND );

  		} else {

  			this.disable( gl.BLEND );
  			currentBlending = blending; // no blending, that is
  			return;

  		}

  		if ( blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha ) {

  			if ( blending === AdditiveBlending ) {

  				if ( premultipliedAlpha ) {

  					gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
  					gl.blendFuncSeparate( gl.ONE, gl.ONE, gl.ONE, gl.ONE );

  				} else {

  					gl.blendEquation( gl.FUNC_ADD );
  					gl.blendFunc( gl.SRC_ALPHA, gl.ONE );

  				}

  			} else if ( blending === SubtractiveBlending ) {

  				if ( premultipliedAlpha ) {

  					gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
  					gl.blendFuncSeparate( gl.ZERO, gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ONE_MINUS_SRC_ALPHA );

  				} else {

  					gl.blendEquation( gl.FUNC_ADD );
  					gl.blendFunc( gl.ZERO, gl.ONE_MINUS_SRC_COLOR );

  				}

  			} else if ( blending === MultiplyBlending ) {

  				if ( premultipliedAlpha ) {

  					gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
  					gl.blendFuncSeparate( gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA );

  				} else {

  					gl.blendEquation( gl.FUNC_ADD );
  					gl.blendFunc( gl.ZERO, gl.SRC_COLOR );

  				}

  			} else {

  				if ( premultipliedAlpha ) {

  					gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
  					gl.blendFuncSeparate( gl.ONE, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );

  				} else {

  					gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
  					gl.blendFuncSeparate( gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );

  				}

  			}

  			currentBlending = blending;
  			currentPremultipledAlpha = premultipliedAlpha;

  		}

  		if ( blending === CustomBlending ) {

  			blendEquationAlpha = blendEquationAlpha || blendEquation;
  			blendSrcAlpha = blendSrcAlpha || blendSrc;
  			blendDstAlpha = blendDstAlpha || blendDst;

  			if ( blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha ) {

  				gl.blendEquationSeparate( paramThreeToGL( blendEquation ), paramThreeToGL( blendEquationAlpha ) );

  				currentBlendEquation = blendEquation;
  				currentBlendEquationAlpha = blendEquationAlpha;

  			}

  			if ( blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha ) {

  				gl.blendFuncSeparate( paramThreeToGL( blendSrc ), paramThreeToGL( blendDst ), paramThreeToGL( blendSrcAlpha ), paramThreeToGL( blendDstAlpha ) );

  				currentBlendSrc = blendSrc;
  				currentBlendDst = blendDst;
  				currentBlendSrcAlpha = blendSrcAlpha;
  				currentBlendDstAlpha = blendDstAlpha;

  			}

  		} else {

  			currentBlendEquation = null;
  			currentBlendSrc = null;
  			currentBlendDst = null;
  			currentBlendEquationAlpha = null;
  			currentBlendSrcAlpha = null;
  			currentBlendDstAlpha = null;

  		}

  	};

  	// TODO Deprecate

  	this.setColorWrite = function ( colorWrite ) {

  		this.buffers.color.setMask( colorWrite );

  	};

  	this.setDepthTest = function ( depthTest ) {

  		this.buffers.depth.setTest( depthTest );

  	};

  	this.setDepthWrite = function ( depthWrite ) {

  		this.buffers.depth.setMask( depthWrite );

  	};

  	this.setDepthFunc = function ( depthFunc ) {

  		this.buffers.depth.setFunc( depthFunc );

  	};

  	this.setStencilTest = function ( stencilTest ) {

  		this.buffers.stencil.setTest( stencilTest );

  	};

  	this.setStencilWrite = function ( stencilWrite ) {

  		this.buffers.stencil.setMask( stencilWrite );

  	};

  	this.setStencilFunc = function ( stencilFunc, stencilRef, stencilMask ) {

  		this.buffers.stencil.setFunc( stencilFunc, stencilRef, stencilMask );

  	};

  	this.setStencilOp = function ( stencilFail, stencilZFail, stencilZPass ) {

  		this.buffers.stencil.setOp( stencilFail, stencilZFail, stencilZPass );

  	};

  	//

  	this.setFlipSided = function ( flipSided ) {

  		if ( currentFlipSided !== flipSided ) {

  			if ( flipSided ) {

  				gl.frontFace( gl.CW );

  			} else {

  				gl.frontFace( gl.CCW );

  			}

  			currentFlipSided = flipSided;

  		}

  	};

  	this.setCullFace = function ( cullFace ) {

  		if ( cullFace !== CullFaceNone ) {

  			this.enable( gl.CULL_FACE );

  			if ( cullFace !== currentCullFace ) {

  				if ( cullFace === CullFaceBack ) {

  					gl.cullFace( gl.BACK );

  				} else if ( cullFace === CullFaceFront ) {

  					gl.cullFace( gl.FRONT );

  				} else {

  					gl.cullFace( gl.FRONT_AND_BACK );

  				}

  			}

  		} else {

  			this.disable( gl.CULL_FACE );

  		}

  		currentCullFace = cullFace;

  	};

  	this.setLineWidth = function ( width ) {

  		if ( width !== currentLineWidth ) {

  			gl.lineWidth( width );

  			currentLineWidth = width;

  		}

  	};

  	this.setPolygonOffset = function ( polygonOffset, factor, units ) {

  		if ( polygonOffset ) {

  			this.enable( gl.POLYGON_OFFSET_FILL );

  			if ( currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units ) {

  				gl.polygonOffset( factor, units );

  				currentPolygonOffsetFactor = factor;
  				currentPolygonOffsetUnits = units;

  			}

  		} else {

  			this.disable( gl.POLYGON_OFFSET_FILL );

  		}

  	};

  	this.getScissorTest = function () {

  		return currentScissorTest;

  	};

  	this.setScissorTest = function ( scissorTest ) {

  		currentScissorTest = scissorTest;

  		if ( scissorTest ) {

  			this.enable( gl.SCISSOR_TEST );

  		} else {

  			this.disable( gl.SCISSOR_TEST );

  		}

  	};

  	// texture

  	this.activeTexture = function ( webglSlot ) {

  		if ( webglSlot === undefined ) webglSlot = gl.TEXTURE0 + maxTextures - 1;

  		if ( currentTextureSlot !== webglSlot ) {

  			gl.activeTexture( webglSlot );
  			currentTextureSlot = webglSlot;

  		}

  	};

  	this.bindTexture = function ( webglType, webglTexture ) {

  		if ( currentTextureSlot === null ) {

  			_this.activeTexture();

  		}

  		var boundTexture = currentBoundTextures[ currentTextureSlot ];

  		if ( boundTexture === undefined ) {

  			boundTexture = { type: undefined, texture: undefined };
  			currentBoundTextures[ currentTextureSlot ] = boundTexture;

  		}

  		if ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {

  			gl.bindTexture( webglType, webglTexture || emptyTextures[ webglType ] );

  			boundTexture.type = webglType;
  			boundTexture.texture = webglTexture;

  		}

  	};

  	this.compressedTexImage2D = function () {

  		try {

  			gl.compressedTexImage2D.apply( gl, arguments );

  		} catch ( error ) {

  			console.error( error );

  		}

  	};

  	this.texImage2D = function () {

  		try {

  			gl.texImage2D.apply( gl, arguments );

  		} catch ( error ) {

  			console.error( error );

  		}

  	};

  	// TODO Deprecate

  	this.clearColor = function ( r, g, b, a ) {

  		this.buffers.color.setClear( r, g, b, a );

  	};

  	this.clearDepth = function ( depth ) {

  		this.buffers.depth.setClear( depth );

  	};

  	this.clearStencil = function ( stencil ) {

  		this.buffers.stencil.setClear( stencil );

  	};

  	//

  	this.scissor = function ( scissor ) {

  		if ( currentScissor.equals( scissor ) === false ) {

  			gl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );
  			currentScissor.copy( scissor );

  		}

  	};

  	this.viewport = function ( viewport ) {

  		if ( currentViewport.equals( viewport ) === false ) {

  			gl.viewport( viewport.x, viewport.y, viewport.z, viewport.w );
  			currentViewport.copy( viewport );

  		}

  	};

  	//

  	this.reset = function () {

  		for ( var i = 0; i < enabledAttributes.length; i ++ ) {

  			if ( enabledAttributes[ i ] === 1 ) {

  				gl.disableVertexAttribArray( i );
  				enabledAttributes[ i ] = 0;

  			}

  		}

  		capabilities = {};

  		compressedTextureFormats = null;

  		currentTextureSlot = null;
  		currentBoundTextures = {};

  		currentBlending = null;

  		currentFlipSided = null;
  		currentCullFace = null;

  		this.buffers.color.reset();
  		this.buffers.depth.reset();
  		this.buffers.stencil.reset();

  	};

  };

  function WebGLColorBuffer( gl, state ) {

  	var locked = false;

  	var color = new Vector4();
  	var currentColorMask = null;
  	var currentColorClear = new Vector4();

  	this.setMask = function ( colorMask ) {

  		if ( currentColorMask !== colorMask && ! locked ) {

  			gl.colorMask( colorMask, colorMask, colorMask, colorMask );
  			currentColorMask = colorMask;

  		}

  	};

  	this.setLocked = function ( lock ) {

  		locked = lock;

  	};

  	this.setClear = function ( r, g, b, a ) {

  		color.set( r, g, b, a );

  		if ( currentColorClear.equals( color ) === false ) {

  			gl.clearColor( r, g, b, a );
  			currentColorClear.copy( color );

  		}

  	};

  	this.reset = function () {

  		locked = false;

  		currentColorMask = null;
  		currentColorClear = new Vector4();

  	};

  };

  function WebGLDepthBuffer( gl, state ) {

  	var locked = false;

  	var currentDepthMask = null;
  	var currentDepthFunc = null;
  	var currentDepthClear = null;

  	this.setTest = function ( depthTest ) {

  		if ( depthTest ) {

  			state.enable( gl.DEPTH_TEST );

  		} else {

  			state.disable( gl.DEPTH_TEST );

  		}

  	};

  	this.setMask = function( depthMask ){

  		if ( currentDepthMask !== depthMask && ! locked ) {

  			gl.depthMask( depthMask );
  			currentDepthMask = depthMask;

  		}

  	};

  	this.setFunc = function ( depthFunc ) {

  		if ( currentDepthFunc !== depthFunc ) {

  			if ( depthFunc ) {

  				switch ( depthFunc ) {

  					case NeverDepth:

  						gl.depthFunc( gl.NEVER );
  						break;

  					case AlwaysDepth:

  						gl.depthFunc( gl.ALWAYS );
  						break;

  					case LessDepth:

  						gl.depthFunc( gl.LESS );
  						break;

  					case LessEqualDepth:

  						gl.depthFunc( gl.LEQUAL );
  						break;

  					case EqualDepth:

  						gl.depthFunc( gl.EQUAL );
  						break;

  					case GreaterEqualDepth:

  						gl.depthFunc( gl.GEQUAL );
  						break;

  					case GreaterDepth:

  						gl.depthFunc( gl.GREATER );
  						break;

  					case NotEqualDepth:

  						gl.depthFunc( gl.NOTEQUAL );
  						break;

  					default:

  						gl.depthFunc( gl.LEQUAL );

  				}

  			} else {

  				gl.depthFunc( gl.LEQUAL );

  			}

  			currentDepthFunc = depthFunc;

  		}

  	};

  	this.setLocked = function ( lock ) {

  		locked = lock;

  	};

  	this.setClear = function ( depth ) {

  		if ( currentDepthClear !== depth ) {

  			gl.clearDepth( depth );
  			currentDepthClear = depth;

  		}

  	};

  	this.reset = function () {

  		locked = false;

  		currentDepthMask = null;
  		currentDepthFunc = null;
  		currentDepthClear = null;

  	};

  };

  function WebGLStencilBuffer( gl, state ) {

  	var locked = false;

  	var currentStencilMask = null;
  	var currentStencilFunc = null;
  	var currentStencilRef = null;
  	var currentStencilFuncMask = null;
  	var currentStencilFail  = null;
  	var currentStencilZFail = null;
  	var currentStencilZPass = null;
  	var currentStencilClear = null;

  	this.setTest = function ( stencilTest ) {

  		if ( stencilTest ) {

  			state.enable( gl.STENCIL_TEST );

  		} else {

  			state.disable( gl.STENCIL_TEST );

  		}

  	};

  	this.setMask = function ( stencilMask ) {

  		if ( currentStencilMask !== stencilMask && ! locked ) {

  			gl.stencilMask( stencilMask );
  			currentStencilMask = stencilMask;

  		}

  	};

  	this.setFunc = function ( stencilFunc, stencilRef, stencilMask ) {

  		if ( currentStencilFunc !== stencilFunc ||
  		     currentStencilRef 	!== stencilRef 	||
  		     currentStencilFuncMask !== stencilMask ) {

  			gl.stencilFunc( stencilFunc,  stencilRef, stencilMask );

  			currentStencilFunc = stencilFunc;
  			currentStencilRef  = stencilRef;
  			currentStencilFuncMask = stencilMask;

  		}

  	};

  	this.setOp	 = function ( stencilFail, stencilZFail, stencilZPass ) {

  		if ( currentStencilFail	 !== stencilFail 	||
  		     currentStencilZFail !== stencilZFail ||
  		     currentStencilZPass !== stencilZPass ) {

  			gl.stencilOp( stencilFail,  stencilZFail, stencilZPass );

  			currentStencilFail  = stencilFail;
  			currentStencilZFail = stencilZFail;
  			currentStencilZPass = stencilZPass;

  		}

  	};

  	this.setLocked = function ( lock ) {

  		locked = lock;

  	};

  	this.setClear = function ( stencil ) {

  		if ( currentStencilClear !== stencil ) {

  			gl.clearStencil( stencil );
  			currentStencilClear = stencil;

  		}

  	};

  	this.reset = function () {

  		locked = false;

  		currentStencilMask = null;
  		currentStencilFunc = null;
  		currentStencilRef = null;
  		currentStencilFuncMask = null;
  		currentStencilFail = null;
  		currentStencilZFail = null;
  		currentStencilZPass = null;
  		currentStencilClear = null;

  	};

  };

  /**
   * @author szimek / https://github.com/szimek/
   * @author alteredq / http://alteredqualia.com/
   * @author Marius Kintel / https://github.com/kintel
   */

  /*
   In options, we can specify:
   * Texture parameters for an auto-generated target texture
   * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers
  */
  function WebGLRenderTarget( width, height, options ) {

  	this.uuid = exports.Math.generateUUID();

  	this.width = width;
  	this.height = height;

  	this.scissor = new Vector4( 0, 0, width, height );
  	this.scissorTest = false;

  	this.viewport = new Vector4( 0, 0, width, height );

  	options = options || {};

  	if ( options.minFilter === undefined ) options.minFilter = LinearFilter;

  	this.texture = new Texture( undefined, undefined, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );

  	this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
  	this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : true;
  	this.depthTexture = null;

  };

  Object.assign( WebGLRenderTarget.prototype, EventDispatcher.prototype, {

  	isWebGLRenderTarget: true,

  	setSize: function ( width, height ) {

  		if ( this.width !== width || this.height !== height ) {

  			this.width = width;
  			this.height = height;

  			this.dispose();

  		}

  		this.viewport.set( 0, 0, width, height );
  		this.scissor.set( 0, 0, width, height );

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( source ) {

  		this.width = source.width;
  		this.height = source.height;

  		this.viewport.copy( source.viewport );

  		this.texture = source.texture.clone();

  		this.depthBuffer = source.depthBuffer;
  		this.stencilBuffer = source.stencilBuffer;
  		this.depthTexture = source.depthTexture;

  		return this;

  	},

  	dispose: function () {

  		this.dispatchEvent( { type: 'dispose' } );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function Material() {

  	Object.defineProperty( this, 'id', { value: MaterialIdCount() } );

  	this.uuid = exports.Math.generateUUID();

  	this.name = '';
  	this.type = 'Material';

  	this.fog = true;
  	this.lights = true;

  	this.blending = NormalBlending;
  	this.side = FrontSide;
  	this.shading = SmoothShading; // THREE.FlatShading, THREE.SmoothShading
  	this.vertexColors = NoColors; // THREE.NoColors, THREE.VertexColors, THREE.FaceColors

  	this.opacity = 1;
  	this.transparent = false;

  	this.blendSrc = SrcAlphaFactor;
  	this.blendDst = OneMinusSrcAlphaFactor;
  	this.blendEquation = AddEquation;
  	this.blendSrcAlpha = null;
  	this.blendDstAlpha = null;
  	this.blendEquationAlpha = null;

  	this.depthFunc = LessEqualDepth;
  	this.depthTest = true;
  	this.depthWrite = true;

  	this.clippingPlanes = null;
  	this.clipShadows = false;

  	this.colorWrite = true;

  	this.precision = null; // override the renderer's default precision for this material

  	this.polygonOffset = false;
  	this.polygonOffsetFactor = 0;
  	this.polygonOffsetUnits = 0;

  	this.alphaTest = 0;
  	this.premultipliedAlpha = false;

  	this.overdraw = 0; // Overdrawn pixels (typically between 0 and 1) for fixing antialiasing gaps in CanvasRenderer

  	this.visible = true;

  	this._needsUpdate = true;

  };

  Material.prototype = {

  	constructor: Material,

  	isMaterial: true,

  	get needsUpdate() {

  		return this._needsUpdate;

  	},

  	set needsUpdate( value ) {

  		if ( value === true ) this.update();
  		this._needsUpdate = value;

  	},

  	setValues: function ( values ) {

  		if ( values === undefined ) return;

  		for ( var key in values ) {

  			var newValue = values[ key ];

  			if ( newValue === undefined ) {

  				console.warn( "THREE.Material: '" + key + "' parameter is undefined." );
  				continue;

  			}

  			var currentValue = this[ key ];

  			if ( currentValue === undefined ) {

  				console.warn( "THREE." + this.type + ": '" + key + "' is not a property of this material." );
  				continue;

  			}

  			if ( (currentValue && currentValue.isColor) ) {

  				currentValue.set( newValue );

  			} else if ( (currentValue && currentValue.isVector3) && (newValue && newValue.isVector3) ) {

  				currentValue.copy( newValue );

  			} else if ( key === 'overdraw' ) {

  				// ensure overdraw is backwards-compatible with legacy boolean type
  				this[ key ] = Number( newValue );

  			} else {

  				this[ key ] = newValue;

  			}

  		}

  	},

  	toJSON: function ( meta ) {

  		var isRoot = meta === undefined;

  		if ( isRoot ) {

  			meta = {
  				textures: {},
  				images: {}
  			};

  		}

  		var data = {
  			metadata: {
  				version: 4.4,
  				type: 'Material',
  				generator: 'Material.toJSON'
  			}
  		};

  		// standard Material serialization
  		data.uuid = this.uuid;
  		data.type = this.type;

  		if ( this.name !== '' ) data.name = this.name;

  		if ( (this.color && this.color.isColor) ) data.color = this.color.getHex();

  		if ( this.roughness !== undefined ) data.roughness = this.roughness;
  		if ( this.metalness !== undefined ) data.metalness = this.metalness;

  		if ( (this.emissive && this.emissive.isColor) ) data.emissive = this.emissive.getHex();
  		if ( (this.specular && this.specular.isColor) ) data.specular = this.specular.getHex();
  		if ( this.shininess !== undefined ) data.shininess = this.shininess;

  		if ( (this.map && this.map.isTexture) ) data.map = this.map.toJSON( meta ).uuid;
  		if ( (this.alphaMap && this.alphaMap.isTexture) ) data.alphaMap = this.alphaMap.toJSON( meta ).uuid;
  		if ( (this.lightMap && this.lightMap.isTexture) ) data.lightMap = this.lightMap.toJSON( meta ).uuid;
  		if ( (this.bumpMap && this.bumpMap.isTexture) ) {

  			data.bumpMap = this.bumpMap.toJSON( meta ).uuid;
  			data.bumpScale = this.bumpScale;

  		}
  		if ( (this.normalMap && this.normalMap.isTexture) ) {

  			data.normalMap = this.normalMap.toJSON( meta ).uuid;
  			data.normalScale = this.normalScale.toArray();

  		}
  		if ( (this.displacementMap && this.displacementMap.isTexture) ) {

  			data.displacementMap = this.displacementMap.toJSON( meta ).uuid;
  			data.displacementScale = this.displacementScale;
  			data.displacementBias = this.displacementBias;

  		}
  		if ( (this.roughnessMap && this.roughnessMap.isTexture) ) data.roughnessMap = this.roughnessMap.toJSON( meta ).uuid;
  		if ( (this.metalnessMap && this.metalnessMap.isTexture) ) data.metalnessMap = this.metalnessMap.toJSON( meta ).uuid;

  		if ( (this.emissiveMap && this.emissiveMap.isTexture) ) data.emissiveMap = this.emissiveMap.toJSON( meta ).uuid;
  		if ( (this.specularMap && this.specularMap.isTexture) ) data.specularMap = this.specularMap.toJSON( meta ).uuid;

  		if ( (this.envMap && this.envMap.isTexture) ) {

  			data.envMap = this.envMap.toJSON( meta ).uuid;
  			data.reflectivity = this.reflectivity; // Scale behind envMap

  		}

  		if ( this.size !== undefined ) data.size = this.size;
  		if ( this.sizeAttenuation !== undefined ) data.sizeAttenuation = this.sizeAttenuation;

  		if ( this.blending !== NormalBlending ) data.blending = this.blending;
  		if ( this.shading !== SmoothShading ) data.shading = this.shading;
  		if ( this.side !== FrontSide ) data.side = this.side;
  		if ( this.vertexColors !== NoColors ) data.vertexColors = this.vertexColors;

  		if ( this.opacity < 1 ) data.opacity = this.opacity;
  		if ( this.transparent === true ) data.transparent = this.transparent;
  		if ( this.alphaTest > 0 ) data.alphaTest = this.alphaTest;
  		if ( this.premultipliedAlpha === true ) data.premultipliedAlpha = this.premultipliedAlpha;
  		if ( this.wireframe === true ) data.wireframe = this.wireframe;
  		if ( this.wireframeLinewidth > 1 ) data.wireframeLinewidth = this.wireframeLinewidth;

  		// TODO: Copied from Object3D.toJSON

  		function extractFromCache( cache ) {

  			var values = [];

  			for ( var key in cache ) {

  				var data = cache[ key ];
  				delete data.metadata;
  				values.push( data );

  			}

  			return values;

  		}

  		if ( isRoot ) {

  			var textures = extractFromCache( meta.textures );
  			var images = extractFromCache( meta.images );

  			if ( textures.length > 0 ) data.textures = textures;
  			if ( images.length > 0 ) data.images = images;

  		}

  		return data;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( source ) {

  		this.name = source.name;

  		this.fog = source.fog;
  		this.lights = source.lights;

  		this.blending = source.blending;
  		this.side = source.side;
  		this.shading = source.shading;
  		this.vertexColors = source.vertexColors;

  		this.opacity = source.opacity;
  		this.transparent = source.transparent;

  		this.blendSrc = source.blendSrc;
  		this.blendDst = source.blendDst;
  		this.blendEquation = source.blendEquation;
  		this.blendSrcAlpha = source.blendSrcAlpha;
  		this.blendDstAlpha = source.blendDstAlpha;
  		this.blendEquationAlpha = source.blendEquationAlpha;

  		this.depthFunc = source.depthFunc;
  		this.depthTest = source.depthTest;
  		this.depthWrite = source.depthWrite;

  		this.colorWrite = source.colorWrite;

  		this.precision = source.precision;

  		this.polygonOffset = source.polygonOffset;
  		this.polygonOffsetFactor = source.polygonOffsetFactor;
  		this.polygonOffsetUnits = source.polygonOffsetUnits;

  		this.alphaTest = source.alphaTest;

  		this.premultipliedAlpha = source.premultipliedAlpha;

  		this.overdraw = source.overdraw;

  		this.visible = source.visible;
  		this.clipShadows = source.clipShadows;

  		var srcPlanes = source.clippingPlanes,
  			dstPlanes = null;

  		if ( srcPlanes !== null ) {

  			var n = srcPlanes.length;
  			dstPlanes = new Array( n );

  			for ( var i = 0; i !== n; ++ i )
  				dstPlanes[ i ] = srcPlanes[ i ].clone();

  		}

  		this.clippingPlanes = dstPlanes;

  		return this;

  	},

  	update: function () {

  		this.dispatchEvent( { type: 'update' } );

  	},

  	dispose: function () {

  		this.dispatchEvent( { type: 'dispose' } );

  	}

  };

  Object.assign( Material.prototype, EventDispatcher.prototype );

  var count$1 = 0;
  function MaterialIdCount() { return count$1++; };

  /**
   * Uniform Utilities
   */

  exports.UniformsUtils = {

  	merge: function ( uniforms ) {

  		var merged = {};

  		for ( var u = 0; u < uniforms.length; u ++ ) {

  			var tmp = this.clone( uniforms[ u ] );

  			for ( var p in tmp ) {

  				merged[ p ] = tmp[ p ];

  			}

  		}

  		return merged;

  	},

  	clone: function ( uniforms_src ) {

  		var uniforms_dst = {};

  		for ( var u in uniforms_src ) {

  			uniforms_dst[ u ] = {};

  			for ( var p in uniforms_src[ u ] ) {

  				var parameter_src = uniforms_src[ u ][ p ];

  				if ( (parameter_src && parameter_src.isColor) ||
  					 (parameter_src && parameter_src.isVector2) ||
  					 (parameter_src && parameter_src.isVector3) ||
  					 (parameter_src && parameter_src.isVector4) ||
  					 (parameter_src && parameter_src.isMatrix3) ||
  					 (parameter_src && parameter_src.isMatrix4) ||
  					 (parameter_src && parameter_src.isTexture) ) {

  					uniforms_dst[ u ][ p ] = parameter_src.clone();

  				} else if ( Array.isArray( parameter_src ) ) {

  					uniforms_dst[ u ][ p ] = parameter_src.slice();

  				} else {

  					uniforms_dst[ u ][ p ] = parameter_src;

  				}

  			}

  		}

  		return uniforms_dst;

  	}

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  defines: { "label" : "value" },
   *  uniforms: { "parameter1": { value: 1.0 }, "parameter2": { value2: 2 } },
   *
   *  fragmentShader: <string>,
   *  vertexShader: <string>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>,
   *
   *  lights: <bool>,
   *
   *  skinning: <bool>,
   *  morphTargets: <bool>,
   *  morphNormals: <bool>
   * }
   */

  function ShaderMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'ShaderMaterial';

  	this.defines = {};
  	this.uniforms = {};

  	this.vertexShader = 'void main() {\n\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}';
  	this.fragmentShader = 'void main() {\n\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}';

  	this.linewidth = 1;

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;

  	this.fog = false; // set to use scene fog
  	this.lights = false; // set to use scene lights
  	this.clipping = false; // set to use user-defined clipping planes

  	this.skinning = false; // set to use skinning attribute streams
  	this.morphTargets = false; // set to use morph targets
  	this.morphNormals = false; // set to use morph normals

  	this.extensions = {
  		derivatives: false, // set to use derivatives
  		fragDepth: false, // set to use fragment depth values
  		drawBuffers: false, // set to use draw buffers
  		shaderTextureLOD: false // set to use shader texture LOD
  	};

  	// When rendered geometry doesn't include these attributes but the material does,
  	// use these default values in WebGL. This avoids errors when buffer data is missing.
  	this.defaultAttributeValues = {
  		'color': [ 1, 1, 1 ],
  		'uv': [ 0, 0 ],
  		'uv2': [ 0, 0 ]
  	};

  	this.index0AttributeName = undefined;

  	if ( parameters !== undefined ) {

  		if ( parameters.attributes !== undefined ) {

  			console.error( 'THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.' );

  		}

  		this.setValues( parameters );

  	}

  };

  ShaderMaterial.prototype = Object.create( Material.prototype );
  ShaderMaterial.prototype.constructor = ShaderMaterial;

  ShaderMaterial.prototype.isShaderMaterial = true;

  ShaderMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.fragmentShader = source.fragmentShader;
  	this.vertexShader = source.vertexShader;

  	this.uniforms = exports.UniformsUtils.clone( source.uniforms );

  	this.defines = source.defines;

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;

  	this.lights = source.lights;
  	this.clipping = source.clipping;

  	this.skinning = source.skinning;

  	this.morphTargets = source.morphTargets;
  	this.morphNormals = source.morphNormals;

  	this.extensions = source.extensions;

  	return this;

  };

  ShaderMaterial.prototype.toJSON = function ( meta ) {

  	var data = Material.prototype.toJSON.call( this, meta );

  	data.uniforms = this.uniforms;
  	data.vertexShader = this.vertexShader;
  	data.fragmentShader = this.fragmentShader;

  	return data;

  };

  var alphamap_fragment = "#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\n#endif\n";

  var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif\n";

  var alphatest_fragment = "#ifdef ALPHATEST\n\tif ( diffuseColor.a < ALPHATEST ) discard;\n#endif\n";

  var aomap_fragment = "#ifdef USE_AOMAP\n\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\n\treflectedLight.indirectDiffuse *= ambientOcclusion;\n\t#if defined( USE_ENVMAP ) && defined( PHYSICAL )\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\n\t#endif\n#endif\n";

  var aomap_pars_fragment = "#ifdef USE_AOMAP\n\tuniform sampler2D aoMap;\n\tuniform float aoMapIntensity;\n#endif";

  var begin_vertex = "\nvec3 transformed = vec3( position );\n";

  var beginnormal_vertex = "\nvec3 objectNormal = vec3( normal );\n";

  var bsdfs = "bool testLightInRange( const in float lightDistance, const in float cutoffDistance ) {\n\treturn any( bvec2( cutoffDistance == 0.0, lightDistance < cutoffDistance ) );\n}\nfloat punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n\t\tif( decayExponent > 0.0 ) {\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\n\t\t\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n\t\t\tfloat maxDistanceCutoffFactor = pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n\t\t\treturn distanceFalloff * maxDistanceCutoffFactor;\n#else\n\t\t\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\n#endif\n\t\t}\n\t\treturn 1.0;\n}\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\n\treturn RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\n\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\n\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\n}\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\treturn 1.0 / ( gl * gv );\n}\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\treturn 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n\tfloat a2 = pow2( alpha );\n\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n\treturn RECIPROCAL_PI * a2 / pow2( denom );\n}\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {\n\tfloat alpha = pow2( roughness );\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\n\tfloat dotNL = saturate( dot( geometry.normal, incidentLight.direction ) );\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n\tfloat D = D_GGX( alpha, dotNH );\n\treturn F * ( G * D );\n}\nvec3 BRDF_Specular_GGX_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n\tvec4 r = roughness * c0 + c1;\n\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n\tvec2 AB = vec2( -1.04, 1.04 ) * a004 + r.zw;\n\treturn specularColor * AB.x + AB.y;\n}\nfloat G_BlinnPhong_Implicit( ) {\n\treturn 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, dotLH );\n\tfloat G = G_BlinnPhong_Implicit( );\n\tfloat D = D_BlinnPhong( shininess, dotNH );\n\treturn F * ( G * D );\n}\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\n\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\n}\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\n\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\n}\n";

  var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n\tuniform sampler2D bumpMap;\n\tuniform float bumpScale;\n\tvec2 dHdxy_fwd() {\n\t\tvec2 dSTdx = dFdx( vUv );\n\t\tvec2 dSTdy = dFdy( vUv );\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\n\t\treturn vec2( dBx, dBy );\n\t}\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\n\t\tvec3 vSigmaX = dFdx( surf_pos );\n\t\tvec3 vSigmaY = dFdy( surf_pos );\n\t\tvec3 vN = surf_norm;\n\t\tvec3 R1 = cross( vSigmaY, vN );\n\t\tvec3 R2 = cross( vN, vSigmaX );\n\t\tfloat fDet = dot( vSigmaX, R1 );\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\n\t}\n#endif\n";

  var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tfor ( int i = 0; i < NUM_CLIPPING_PLANES; ++ i ) {\n\t\tvec4 plane = clippingPlanes[ i ];\n\t\tif ( dot( vViewPosition, plane.xyz ) > plane.w ) discard;\n\t}\n#endif\n";

  var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n\t#if ! defined( PHYSICAL ) && ! defined( PHONG )\n\t\tvarying vec3 vViewPosition;\n\t#endif\n\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif\n";

  var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0 && ! defined( PHYSICAL ) && ! defined( PHONG )\n\tvarying vec3 vViewPosition;\n#endif\n";

  var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0 && ! defined( PHYSICAL ) && ! defined( PHONG )\n\tvViewPosition = - mvPosition.xyz;\n#endif\n";

  var color_fragment = "#ifdef USE_COLOR\n\tdiffuseColor.rgb *= vColor;\n#endif";

  var color_pars_fragment = "#ifdef USE_COLOR\n\tvarying vec3 vColor;\n#endif\n";

  var color_pars_vertex = "#ifdef USE_COLOR\n\tvarying vec3 vColor;\n#endif";

  var color_vertex = "#ifdef USE_COLOR\n\tvColor.xyz = color.xyz;\n#endif";

  var common = "#define PI 3.14159265359\n#define PI2 6.28318530718\n#define RECIPROCAL_PI 0.31830988618\n#define RECIPROCAL_PI2 0.15915494\n#define LOG2 1.442695\n#define EPSILON 1e-6\n#define saturate(a) clamp( a, 0.0, 1.0 )\n#define whiteCompliment(a) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\nhighp float rand( const in vec2 uv ) {\n\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\n\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n\treturn fract(sin(sn) * c);\n}\nstruct IncidentLight {\n\tvec3 color;\n\tvec3 direction;\n\tbool visible;\n};\nstruct ReflectedLight {\n\tvec3 directDiffuse;\n\tvec3 directSpecular;\n\tvec3 indirectDiffuse;\n\tvec3 indirectSpecular;\n};\nstruct GeometricContext {\n\tvec3 position;\n\tvec3 normal;\n\tvec3 viewDir;\n};\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\tfloat distance = dot( planeNormal, point - pointOnPlane );\n\treturn - distance * planeNormal + point;\n}\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn sign( dot( point - pointOnPlane, planeNormal ) );\n}\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\n\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\n}\n";

  var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n#define cubeUV_textureSize (1024.0)\nint getFaceFromDirection(vec3 direction) {\n\tvec3 absDirection = abs(direction);\n\tint face = -1;\n\tif( absDirection.x > absDirection.z ) {\n\t\tif(absDirection.x > absDirection.y )\n\t\t\tface = direction.x > 0.0 ? 0 : 3;\n\t\telse\n\t\t\tface = direction.y > 0.0 ? 1 : 4;\n\t}\n\telse {\n\t\tif(absDirection.z > absDirection.y )\n\t\t\tface = direction.z > 0.0 ? 2 : 5;\n\t\telse\n\t\t\tface = direction.y > 0.0 ? 1 : 4;\n\t}\n\treturn face;\n}\n#define cubeUV_maxLods1  (log2(cubeUV_textureSize*0.25) - 1.0)\n#define cubeUV_rangeClamp (exp2((6.0 - 1.0) * 2.0))\nvec2 MipLevelInfo( vec3 vec, float roughnessLevel, float roughness ) {\n\tfloat scale = exp2(cubeUV_maxLods1 - roughnessLevel);\n\tfloat dxRoughness = dFdx(roughness);\n\tfloat dyRoughness = dFdy(roughness);\n\tvec3 dx = dFdx( vec * scale * dxRoughness );\n\tvec3 dy = dFdy( vec * scale * dyRoughness );\n\tfloat d = max( dot( dx, dx ), dot( dy, dy ) );\n\td = clamp(d, 1.0, cubeUV_rangeClamp);\n\tfloat mipLevel = 0.5 * log2(d);\n\treturn vec2(floor(mipLevel), fract(mipLevel));\n}\n#define cubeUV_maxLods2 (log2(cubeUV_textureSize*0.25) - 2.0)\n#define cubeUV_rcpTextureSize (1.0 / cubeUV_textureSize)\nvec2 getCubeUV(vec3 direction, float roughnessLevel, float mipLevel) {\n\tmipLevel = roughnessLevel > cubeUV_maxLods2 - 3.0 ? 0.0 : mipLevel;\n\tfloat a = 16.0 * cubeUV_rcpTextureSize;\n\tvec2 exp2_packed = exp2( vec2( roughnessLevel, mipLevel ) );\n\tvec2 rcp_exp2_packed = vec2( 1.0 ) / exp2_packed;\n\tfloat powScale = exp2_packed.x * exp2_packed.y;\n\tfloat scale = rcp_exp2_packed.x * rcp_exp2_packed.y * 0.25;\n\tfloat mipOffset = 0.75*(1.0 - rcp_exp2_packed.y) * rcp_exp2_packed.x;\n\tbool bRes = mipLevel == 0.0;\n\tscale =  bRes && (scale < a) ? a : scale;\n\tvec3 r;\n\tvec2 offset;\n\tint face = getFaceFromDirection(direction);\n\tfloat rcpPowScale = 1.0 / powScale;\n\tif( face == 0) {\n\t\tr = vec3(direction.x, -direction.z, direction.y);\n\t\toffset = vec2(0.0+mipOffset,0.75 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ?  a : offset.y;\n\t}\n\telse if( face == 1) {\n\t\tr = vec3(direction.y, direction.x, direction.z);\n\t\toffset = vec2(scale+mipOffset, 0.75 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ?  a : offset.y;\n\t}\n\telse if( face == 2) {\n\t\tr = vec3(direction.z, direction.x, direction.y);\n\t\toffset = vec2(2.0*scale+mipOffset, 0.75 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ?  a : offset.y;\n\t}\n\telse if( face == 3) {\n\t\tr = vec3(direction.x, direction.z, direction.y);\n\t\toffset = vec2(0.0+mipOffset,0.5 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ?  0.0 : offset.y;\n\t}\n\telse if( face == 4) {\n\t\tr = vec3(direction.y, direction.x, -direction.z);\n\t\toffset = vec2(scale+mipOffset, 0.5 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ?  0.0 : offset.y;\n\t}\n\telse {\n\t\tr = vec3(direction.z, -direction.x, direction.y);\n\t\toffset = vec2(2.0*scale+mipOffset, 0.5 * rcpPowScale);\n\t\toffset.y = bRes && (offset.y < 2.0*a) ?  0.0 : offset.y;\n\t}\n\tr = normalize(r);\n\tfloat texelOffset = 0.5 * cubeUV_rcpTextureSize;\n\tvec2 s = ( r.yz / abs( r.x ) + vec2( 1.0 ) ) * 0.5;\n\tvec2 base = offset + vec2( texelOffset );\n\treturn base + s * ( scale - 2.0 * texelOffset );\n}\n#define cubeUV_maxLods3 (log2(cubeUV_textureSize*0.25) - 3.0)\nvec4 textureCubeUV(vec3 reflectedDirection, float roughness ) {\n\tfloat roughnessVal = roughness* cubeUV_maxLods3;\n\tfloat r1 = floor(roughnessVal);\n\tfloat r2 = r1 + 1.0;\n\tfloat t = fract(roughnessVal);\n\tvec2 mipInfo = MipLevelInfo(reflectedDirection, r1, roughness);\n\tfloat s = mipInfo.y;\n\tfloat level0 = mipInfo.x;\n\tfloat level1 = level0 + 1.0;\n\tlevel1 = level1 > 5.0 ? 5.0 : level1;\n\tlevel0 += min( floor( s + 0.5 ), 5.0 );\n\tvec2 uv_10 = getCubeUV(reflectedDirection, r1, level0);\n\tvec4 color10 = envMapTexelToLinear(texture2D(envMap, uv_10));\n\tvec2 uv_20 = getCubeUV(reflectedDirection, r2, level0);\n\tvec4 color20 = envMapTexelToLinear(texture2D(envMap, uv_20));\n\tvec4 result = mix(color10, color20, t);\n\treturn vec4(result.rgb, 1.0);\n}\n#endif\n";

  var defaultnormal_vertex = "#ifdef FLIP_SIDED\n\tobjectNormal = -objectNormal;\n#endif\nvec3 transformedNormal = normalMatrix * objectNormal;\n";

  var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n\tuniform sampler2D displacementMap;\n\tuniform float displacementScale;\n\tuniform float displacementBias;\n#endif\n";

  var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n\ttransformed += normal * ( texture2D( displacementMap, uv ).x * displacementScale + displacementBias );\n#endif\n";

  var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\n\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\n\ttotalEmissiveRadiance *= emissiveColor.rgb;\n#endif\n";

  var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n\tuniform sampler2D emissiveMap;\n#endif\n";

  var encodings_fragment = "  gl_FragColor = linearToOutputTexel( gl_FragColor );\n";

  var encodings_pars_fragment = "\nvec4 LinearToLinear( in vec4 value ) {\n  return value;\n}\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\n  return vec4( pow( value.xyz, vec3( gammaFactor ) ), value.w );\n}\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\n  return vec4( pow( value.xyz, vec3( 1.0 / gammaFactor ) ), value.w );\n}\nvec4 sRGBToLinear( in vec4 value ) {\n  return vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.w );\n}\nvec4 LinearTosRGB( in vec4 value ) {\n  return vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.w );\n}\nvec4 RGBEToLinear( in vec4 value ) {\n  return vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\n}\nvec4 LinearToRGBE( in vec4 value ) {\n  float maxComponent = max( max( value.r, value.g ), value.b );\n  float fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\n  return vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\n}\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\n  return vec4( value.xyz * value.w * maxRange, 1.0 );\n}\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\n  float maxRGB = max( value.x, max( value.g, value.b ) );\n  float M      = clamp( maxRGB / maxRange, 0.0, 1.0 );\n  M            = ceil( M * 255.0 ) / 255.0;\n  return vec4( value.rgb / ( M * maxRange ), M );\n}\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\n    return vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\n}\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\n    float maxRGB = max( value.x, max( value.g, value.b ) );\n    float D      = max( maxRange / maxRGB, 1.0 );\n    D            = min( floor( D ) / 255.0, 1.0 );\n    return vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\n}\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\nvec4 LinearToLogLuv( in vec4 value )  {\n  vec3 Xp_Y_XYZp = value.rgb * cLogLuvM;\n  Xp_Y_XYZp = max(Xp_Y_XYZp, vec3(1e-6, 1e-6, 1e-6));\n  vec4 vResult;\n  vResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\n  float Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\n  vResult.w = fract(Le);\n  vResult.z = (Le - (floor(vResult.w*255.0))/255.0)/255.0;\n  return vResult;\n}\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\nvec4 LogLuvToLinear( in vec4 value ) {\n  float Le = value.z * 255.0 + value.w;\n  vec3 Xp_Y_XYZp;\n  Xp_Y_XYZp.y = exp2((Le - 127.0) / 2.0);\n  Xp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\n  Xp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\n  vec3 vRGB = Xp_Y_XYZp.rgb * cLogLuvInverseM;\n  return vec4( max(vRGB, 0.0), 1.0 );\n}\n";

  var envmap_fragment = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\tvec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#else\n\t\tvec3 reflectVec = vReflect;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tvec4 envColor = textureCube( envMap, flipNormal * vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n\t#elif defined( ENVMAP_TYPE_EQUIREC )\n\t\tvec2 sampleUV;\n\t\tsampleUV.y = saturate( flipNormal * reflectVec.y * 0.5 + 0.5 );\n\t\tsampleUV.x = atan( flipNormal * reflectVec.z, flipNormal * reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\n\t\tvec4 envColor = texture2D( envMap, sampleUV );\n\t#elif defined( ENVMAP_TYPE_SPHERE )\n\t\tvec3 reflectView = flipNormal * normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) );\n\t\tvec4 envColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5 );\n\t#endif\n\tenvColor = envMapTexelToLinear( envColor );\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_MIX )\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_ADD )\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\n\t#endif\n#endif\n";

  var envmap_pars_fragment = "#if defined( USE_ENVMAP ) || defined( PHYSICAL )\n\tuniform float reflectivity;\n\tuniform float envMapIntenstiy;\n#endif\n#ifdef USE_ENVMAP\n\t#if ! defined( PHYSICAL ) && ( defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) )\n\t\tvarying vec3 vWorldPosition;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tuniform samplerCube envMap;\n\t#else\n\t\tuniform sampler2D envMap;\n\t#endif\n\tuniform float flipEnvMap;\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( PHYSICAL )\n\t\tuniform float refractionRatio;\n\t#else\n\t\tvarying vec3 vReflect;\n\t#endif\n#endif\n";

  var envmap_pars_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\tvarying vec3 vWorldPosition;\n\t#else\n\t\tvarying vec3 vReflect;\n\t\tuniform float refractionRatio;\n\t#endif\n#endif\n";

  var envmap_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\tvWorldPosition = worldPosition.xyz;\n\t#else\n\t\tvec3 cameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n\t\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvReflect = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#endif\n#endif\n";

  var fog_fragment = "#ifdef USE_FOG\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tfloat depth = gl_FragDepthEXT / gl_FragCoord.w;\n\t#else\n\t\tfloat depth = gl_FragCoord.z / gl_FragCoord.w;\n\t#endif\n\t#ifdef FOG_EXP2\n\t\tfloat fogFactor = whiteCompliment( exp2( - fogDensity * fogDensity * depth * depth * LOG2 ) );\n\t#else\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, depth );\n\t#endif\n\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif\n";

  var fog_pars_fragment = "#ifdef USE_FOG\n\tuniform vec3 fogColor;\n\t#ifdef FOG_EXP2\n\t\tuniform float fogDensity;\n\t#else\n\t\tuniform float fogNear;\n\t\tuniform float fogFar;\n\t#endif\n#endif";

  var lightmap_fragment = "#ifdef USE_LIGHTMAP\n\treflectedLight.indirectDiffuse += PI * texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\n#endif\n";

  var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n\tuniform sampler2D lightMap;\n\tuniform float lightMapIntensity;\n#endif";

  var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\nGeometricContext geometry;\ngeometry.position = mvPosition.xyz;\ngeometry.normal = normalize( transformedNormal );\ngeometry.viewDir = normalize( -mvPosition.xyz );\nGeometricContext backGeometry;\nbackGeometry.position = geometry.position;\nbackGeometry.normal = -geometry.normal;\nbackGeometry.viewDir = geometry.viewDir;\nvLightFront = vec3( 0.0 );\n#ifdef DOUBLE_SIDED\n\tvLightBack = vec3( 0.0 );\n#endif\nIncidentLight directLight;\nfloat dotNL;\nvec3 directLightColor_Diffuse;\n#if NUM_POINT_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n#endif\n#if NUM_DIR_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\tvLightFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\n\t\t#endif\n\t}\n#endif\n";

  var lights_pars = "uniform vec3 ambientLightColor;\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n\tvec3 irradiance = ambientLightColor;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treturn irradiance;\n}\n#if NUM_DIR_LIGHTS > 0\n\tstruct DirectionalLight {\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tint shadow;\n\t\tfloat shadowBias;\n\t\tfloat shadowRadius;\n\t\tvec2 shadowMapSize;\n\t};\n\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tdirectLight.color = directionalLight.color;\n\t\tdirectLight.direction = directionalLight.direction;\n\t\tdirectLight.visible = true;\n\t}\n#endif\n#if NUM_POINT_LIGHTS > 0\n\tstruct PointLight {\n\t\tvec3 position;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tint shadow;\n\t\tfloat shadowBias;\n\t\tfloat shadowRadius;\n\t\tvec2 shadowMapSize;\n\t};\n\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\n\t\tvec3 lVector = pointLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tif ( testLightInRange( lightDistance, pointLight.distance ) ) {\n\t\t\tdirectLight.color = pointLight.color;\n\t\t\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\n\t\t\tdirectLight.visible = true;\n\t\t} else {\n\t\t\tdirectLight.color = vec3( 0.0 );\n\t\t\tdirectLight.visible = false;\n\t\t}\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\tstruct SpotLight {\n\t\tvec3 position;\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tfloat coneCos;\n\t\tfloat penumbraCos;\n\t\tint shadow;\n\t\tfloat shadowBias;\n\t\tfloat shadowRadius;\n\t\tvec2 shadowMapSize;\n\t};\n\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight  ) {\n\t\tvec3 lVector = spotLight.position - geometry.position;\n\t\tdirectLight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tfloat angleCos = dot( directLight.direction, spotLight.direction );\n\t\tif ( all( bvec2( angleCos > spotLight.coneCos, testLightInRange( lightDistance, spotLight.distance ) ) ) ) {\n\t\t\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n\t\t\tdirectLight.color = spotLight.color;\n\t\t\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\n\t\t\tdirectLight.visible = true;\n\t\t} else {\n\t\t\tdirectLight.color = vec3( 0.0 );\n\t\t\tdirectLight.visible = false;\n\t\t}\n\t}\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\tstruct HemisphereLight {\n\t\tvec3 direction;\n\t\tvec3 skyColor;\n\t\tvec3 groundColor;\n\t};\n\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\n\t\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\n\t\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n\t\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tirradiance *= PI;\n\t\t#endif\n\t\treturn irradiance;\n\t}\n#endif\n#if defined( USE_ENVMAP ) && defined( PHYSICAL )\n\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\n\t\t#include <normal_flip>\n\t\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryVec = flipNormal * vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec3 queryVec = flipNormal * vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\n\t\t\tvec4 envMapColor = textureCubeUV( queryVec, 1.0 );\n\t\t#else\n\t\t\tvec4 envMapColor = vec4( 0.0 );\n\t\t#endif\n\t\treturn PI * envMapColor.rgb * envMapIntensity;\n\t}\n\tfloat getSpecularMIPLevel( const in float blinnShininessExponent, const in int maxMIPLevel ) {\n\t\tfloat maxMIPLevelScalar = float( maxMIPLevel );\n\t\tfloat desiredMIPLevel = maxMIPLevelScalar - 0.79248 - 0.5 * log2( pow2( blinnShininessExponent ) + 1.0 );\n\t\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\n\t}\n\tvec3 getLightProbeIndirectRadiance( const in GeometricContext geometry, const in float blinnShininessExponent, const in int maxMIPLevel ) {\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( -geometry.viewDir, geometry.normal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( -geometry.viewDir, geometry.normal, refractionRatio );\n\t\t#endif\n\t\t#include <normal_flip>\n\t\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n\t\tfloat specularMIPLevel = getSpecularMIPLevel( blinnShininessExponent, maxMIPLevel );\n\t\t#ifdef ENVMAP_TYPE_CUBE\n\t\t\tvec3 queryReflectVec = flipNormal * vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec3 queryReflectVec = flipNormal * vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\n\t\t\tvec4 envMapColor = textureCubeUV(queryReflectVec, BlinnExponentToGGXRoughness(blinnShininessExponent));\n\t\t#elif defined( ENVMAP_TYPE_EQUIREC )\n\t\t\tvec2 sampleUV;\n\t\t\tsampleUV.y = saturate( flipNormal * reflectVec.y * 0.5 + 0.5 );\n\t\t\tsampleUV.x = atan( flipNormal * reflectVec.z, flipNormal * reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = texture2DLodEXT( envMap, sampleUV, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = texture2D( envMap, sampleUV, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#elif defined( ENVMAP_TYPE_SPHERE )\n\t\t\tvec3 reflectView = flipNormal * normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0,0.0,1.0 ) );\n\t\t\t#ifdef TEXTURE_LOD_EXT\n\t\t\t\tvec4 envMapColor = texture2DLodEXT( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\n\t\t\t#else\n\t\t\t\tvec4 envMapColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\n\t\t\t#endif\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\n\t\t#endif\n\t\treturn envMapColor.rgb * envMapIntensity;\n\t}\n#endif\n";

  var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;\n";

  var lights_phong_pars_fragment = "varying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\nstruct BlinnPhongMaterial {\n\tvec3\tdiffuseColor;\n\tvec3\tspecularColor;\n\tfloat\tspecularShininess;\n\tfloat\tspecularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_BlinnPhong\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_BlinnPhong\n#define Material_LightProbeLOD( material )\t(0)\n";

  var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nmaterial.specularRoughness = clamp( roughnessFactor, 0.04, 1.0 );\n#ifdef STANDARD\n\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\n#else\n\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\n\tmaterial.clearCoat = saturate( clearCoat );\tmaterial.clearCoatRoughness = clamp( clearCoatRoughness, 0.04, 1.0 );\n#endif\n";

  var lights_physical_pars_fragment = "struct PhysicalMaterial {\n\tvec3\tdiffuseColor;\n\tfloat\tspecularRoughness;\n\tvec3\tspecularColor;\n\t#ifndef STANDARD\n\t\tfloat clearCoat;\n\t\tfloat clearCoatRoughness;\n\t#endif\n};\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\nfloat clearCoatDHRApprox( const in float roughness, const in float dotNL ) {\n\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\n}\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\tirradiance *= PI;\n\t#endif\n\t#ifndef STANDARD\n\t\tfloat clearCoatDHR = material.clearCoat * clearCoatDHRApprox( material.clearCoatRoughness, dotNL );\n\t#else\n\t\tfloat clearCoatDHR = 0.0;\n\t#endif\n\treflectedLight.directSpecular += ( 1.0 - clearCoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry, material.specularColor, material.specularRoughness );\n\treflectedLight.directDiffuse += ( 1.0 - clearCoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n\t#ifndef STANDARD\n\t\treflectedLight.directSpecular += irradiance * material.clearCoat * BRDF_Specular_GGX( directLight, geometry, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearCoatRoughness );\n\t#endif\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 clearCoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\t#ifndef STANDARD\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\tfloat dotNL = dotNV;\n\t\tfloat clearCoatDHR = material.clearCoat * clearCoatDHRApprox( material.clearCoatRoughness, dotNL );\n\t#else\n\t\tfloat clearCoatDHR = 0.0;\n\t#endif\n\treflectedLight.indirectSpecular += ( 1.0 - clearCoatDHR ) * radiance * BRDF_Specular_GGX_Environment( geometry, material.specularColor, material.specularRoughness );\n\t#ifndef STANDARD\n\t\treflectedLight.indirectSpecular += clearCoatRadiance * material.clearCoat * BRDF_Specular_GGX_Environment( geometry, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearCoatRoughness );\n\t#endif\n}\n#define RE_Direct\t\t\t\tRE_Direct_Physical\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular\t\tRE_IndirectSpecular_Physical\n#define Material_BlinnShininessExponent( material )   GGXRoughnessToBlinnExponent( material.specularRoughness )\n#define Material_ClearCoat_BlinnShininessExponent( material )   GGXRoughnessToBlinnExponent( material.clearCoatRoughness )\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}\n";

  var lights_template = "\nGeometricContext geometry;\ngeometry.position = - vViewPosition;\ngeometry.normal = normal;\ngeometry.viewDir = normalize( vViewPosition );\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n\tPointLight pointLight;\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\n\t\t#ifdef USE_SHADOWMAP\n\t\tdirectLight.color *= all( bvec2( pointLight.shadow, directLight.visible ) ) ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n\tSpotLight spotLight;\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\n\t\t#ifdef USE_SHADOWMAP\n\t\tdirectLight.color *= all( bvec2( spotLight.shadow, directLight.visible ) ) ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n\tDirectionalLight directionalLight;\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\n\t\t#ifdef USE_SHADOWMAP\n\t\tdirectLight.color *= all( bvec2( directionalLight.shadow, directLight.visible ) ) ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n#endif\n#if defined( RE_IndirectDiffuse )\n\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n\t#ifdef USE_LIGHTMAP\n\t\tvec3 lightMapIrradiance = texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\n\t\t\tlightMapIrradiance *= PI;\n\t\t#endif\n\t\tirradiance += lightMapIrradiance;\n\t#endif\n\t#if ( NUM_HEMI_LIGHTS > 0 )\n\t\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\t\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\n\t\t}\n\t#endif\n\t#if defined( USE_ENVMAP ) && defined( PHYSICAL ) && defined( ENVMAP_TYPE_CUBE_UV )\n\t \tirradiance += getLightProbeIndirectIrradiance( geometry, 8 );\n\t#endif\n\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n\tvec3 radiance = getLightProbeIndirectRadiance( geometry, Material_BlinnShininessExponent( material ), 8 );\n\t#ifndef STANDARD\n\t\tvec3 clearCoatRadiance = getLightProbeIndirectRadiance( geometry, Material_ClearCoat_BlinnShininessExponent( material ), 8 );\n\t#else\n\t\tvec3 clearCoatRadiance = vec3( 0.0 );\n\t#endif\n\t\t\n\tRE_IndirectSpecular( radiance, clearCoatRadiance, geometry, material, reflectedLight );\n#endif\n";

  var logdepthbuf_fragment = "#if defined(USE_LOGDEPTHBUF) && defined(USE_LOGDEPTHBUF_EXT)\n\tgl_FragDepthEXT = log2(vFragDepth) * logDepthBufFC * 0.5;\n#endif";

  var logdepthbuf_pars_fragment = "#ifdef USE_LOGDEPTHBUF\n\tuniform float logDepthBufFC;\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t#endif\n#endif\n";

  var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t#endif\n\tuniform float logDepthBufFC;\n#endif";

  var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n\tgl_Position.z = log2(max( EPSILON, gl_Position.w + 1.0 )) * logDepthBufFC;\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvFragDepth = 1.0 + gl_Position.w;\n\t#else\n\t\tgl_Position.z = (gl_Position.z - 1.0) * gl_Position.w;\n\t#endif\n#endif\n";

  var map_fragment = "#ifdef USE_MAP\n\tvec4 texelColor = texture2D( map, vUv );\n\ttexelColor = mapTexelToLinear( texelColor );\n\tdiffuseColor *= texelColor;\n#endif\n";

  var map_pars_fragment = "#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif\n";

  var map_particle_fragment = "#ifdef USE_MAP\n\tvec4 mapTexel = texture2D( map, vec2( gl_PointCoord.x, 1.0 - gl_PointCoord.y ) * offsetRepeat.zw + offsetRepeat.xy );\n\tdiffuseColor *= mapTexelToLinear( mapTexel );\n#endif\n";

  var map_particle_pars_fragment = "#ifdef USE_MAP\n\tuniform vec4 offsetRepeat;\n\tuniform sampler2D map;\n#endif\n";

  var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\n\tmetalnessFactor *= texelMetalness.r;\n#endif\n";

  var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n\tuniform sampler2D metalnessMap;\n#endif";

  var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n\tobjectNormal += ( morphNormal0 - normal ) * morphTargetInfluences[ 0 ];\n\tobjectNormal += ( morphNormal1 - normal ) * morphTargetInfluences[ 1 ];\n\tobjectNormal += ( morphNormal2 - normal ) * morphTargetInfluences[ 2 ];\n\tobjectNormal += ( morphNormal3 - normal ) * morphTargetInfluences[ 3 ];\n#endif\n";

  var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n\t#ifndef USE_MORPHNORMALS\n\tuniform float morphTargetInfluences[ 8 ];\n\t#else\n\tuniform float morphTargetInfluences[ 4 ];\n\t#endif\n#endif";

  var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n\ttransformed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];\n\ttransformed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];\n\ttransformed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];\n\ttransformed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];\n\t#ifndef USE_MORPHNORMALS\n\ttransformed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];\n\ttransformed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];\n\ttransformed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];\n\ttransformed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];\n\t#endif\n#endif\n";

  var normal_flip = "#ifdef DOUBLE_SIDED\n\tfloat flipNormal = ( float( gl_FrontFacing ) * 2.0 - 1.0 );\n#else\n\tfloat flipNormal = 1.0;\n#endif\n";

  var normal_fragment = "#ifdef FLAT_SHADED\n\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\n\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\n\tvec3 normal = normalize( cross( fdx, fdy ) );\n#else\n\tvec3 normal = normalize( vNormal ) * flipNormal;\n#endif\n#ifdef USE_NORMALMAP\n\tnormal = perturbNormal2Arb( -vViewPosition, normal );\n#elif defined( USE_BUMPMAP )\n\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\n#endif\n";

  var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n\tuniform sampler2D normalMap;\n\tuniform vec2 normalScale;\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {\n\t\tvec3 q0 = dFdx( eye_pos.xyz );\n\t\tvec3 q1 = dFdy( eye_pos.xyz );\n\t\tvec2 st0 = dFdx( vUv.st );\n\t\tvec2 st1 = dFdy( vUv.st );\n\t\tvec3 S = normalize( q0 * st1.t - q1 * st0.t );\n\t\tvec3 T = normalize( -q0 * st1.s + q1 * st0.s );\n\t\tvec3 N = normalize( surf_norm );\n\t\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\t\tmapN.xy = normalScale * mapN.xy;\n\t\tmat3 tsn = mat3( S, T, N );\n\t\treturn normalize( tsn * mapN );\n\t}\n#endif\n";

  var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n  return normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n  return 1.0 - 2.0 * rgb.xyz;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256.,  256. );\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\nconst float ShiftRight8 = 1. / 256.;\nvec4 packDepthToRGBA( const in float v ) {\n\tvec4 r = vec4( fract( v * PackFactors ), v );\n\tr.yzw -= r.xyz * ShiftRight8;\treturn r * PackUpscale;\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n\treturn dot( v, UnpackFactors );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n  return ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\n  return linearClipZ * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n  return (( near + viewZ ) * far ) / (( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\n  return ( near * far ) / ( ( far - near ) * invClipZ - far );\n}\n";

  var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n\tgl_FragColor.rgb *= gl_FragColor.a;\n#endif\n";

  var project_vertex = "#ifdef USE_SKINNING\n\tvec4 mvPosition = modelViewMatrix * skinned;\n#else\n\tvec4 mvPosition = modelViewMatrix * vec4( transformed, 1.0 );\n#endif\ngl_Position = projectionMatrix * mvPosition;\n";

  var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\n\troughnessFactor *= texelRoughness.r;\n#endif\n";

  var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n\tuniform sampler2D roughnessMap;\n#endif";

  var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\t\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHTS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHTS ];\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\t\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHTS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHTS ];\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\t\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHTS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHTS ];\n\t#endif\n\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n\t\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n\t}\n\tfloat texture2DShadowLerp( sampler2D depths, vec2 size, vec2 uv, float compare ) {\n\t\tconst vec2 offset = vec2( 0.0, 1.0 );\n\t\tvec2 texelSize = vec2( 1.0 ) / size;\n\t\tvec2 centroidUV = floor( uv * size + 0.5 ) / size;\n\t\tfloat lb = texture2DCompare( depths, centroidUV + texelSize * offset.xx, compare );\n\t\tfloat lt = texture2DCompare( depths, centroidUV + texelSize * offset.xy, compare );\n\t\tfloat rb = texture2DCompare( depths, centroidUV + texelSize * offset.yx, compare );\n\t\tfloat rt = texture2DCompare( depths, centroidUV + texelSize * offset.yy, compare );\n\t\tvec2 f = fract( uv * size + 0.5 );\n\t\tfloat a = mix( lb, lt, f.y );\n\t\tfloat b = mix( rb, rt, f.y );\n\t\tfloat c = mix( a, b, f.x );\n\t\treturn c;\n\t}\n\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n\t\tshadowCoord.xyz /= shadowCoord.w;\n\t\tshadowCoord.z += shadowBias;\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\n\t\tbool inFrustum = all( inFrustumVec );\n\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\n\t\tbool frustumTest = all( frustumTestVec );\n\t\tif ( frustumTest ) {\n\t\t#if defined( SHADOWMAP_TYPE_PCF )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\treturn (\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\treturn (\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\treturn texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#endif\n\t\t}\n\t\treturn 1.0;\n\t}\n\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\n\t\tvec3 absV = abs( v );\n\t\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n\t\tabsV *= scaleToCube;\n\t\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n\t\tvec2 planar = v.xy;\n\t\tfloat almostATexel = 1.5 * texelSizeY;\n\t\tfloat almostOne = 1.0 - almostATexel;\n\t\tif ( absV.z >= almostOne ) {\n\t\t\tif ( v.z > 0.0 )\n\t\t\t\tplanar.x = 4.0 - v.x;\n\t\t} else if ( absV.x >= almostOne ) {\n\t\t\tfloat signX = sign( v.x );\n\t\t\tplanar.x = v.z * signX + 2.0 * signX;\n\t\t} else if ( absV.y >= almostOne ) {\n\t\t\tfloat signY = sign( v.y );\n\t\t\tplanar.x = v.x + 2.0 * signY + 2.0;\n\t\t\tplanar.y = v.z * signY - 2.0;\n\t\t}\n\t\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n\t}\n\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n\t\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n\t\tvec3 lightToPosition = shadowCoord.xyz;\n\t\tvec3 bd3D = normalize( lightToPosition );\n\t\tfloat dp = ( length( lightToPosition ) - shadowBias ) / 1000.0;\n\t\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n\t\t\treturn (\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n\t\t#endif\n\t}\n#endif\n";

  var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\t\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHTS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHTS ];\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\t\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHTS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHTS ];\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\t\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHTS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHTS ];\n\t#endif\n#endif\n";

  var shadowmap_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * worldPosition;\n\t}\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * worldPosition;\n\t}\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * worldPosition;\n\t}\n\t#endif\n#endif\n";

  var shadowmask_pars_fragment = "float getShadowMask() {\n\tfloat shadow = 1.0;\n\t#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHTS > 0\n\tDirectionalLight directionalLight;\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tshadow *= bool( directionalLight.shadow ) ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t}\n\t#endif\n\t#if NUM_SPOT_LIGHTS > 0\n\tSpotLight spotLight;\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tshadow *= bool( spotLight.shadow ) ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t}\n\t#endif\n\t#if NUM_POINT_LIGHTS > 0\n\tPointLight pointLight;\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tshadow *= bool( pointLight.shadow ) ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ] ) : 1.0;\n\t}\n\t#endif\n\t#endif\n\treturn shadow;\n}\n";

  var skinbase_vertex = "#ifdef USE_SKINNING\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";

  var skinning_pars_vertex = "#ifdef USE_SKINNING\n\tuniform mat4 bindMatrix;\n\tuniform mat4 bindMatrixInverse;\n\t#ifdef BONE_TEXTURE\n\t\tuniform sampler2D boneTexture;\n\t\tuniform int boneTextureWidth;\n\t\tuniform int boneTextureHeight;\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tfloat j = i * 4.0;\n\t\t\tfloat x = mod( j, float( boneTextureWidth ) );\n\t\t\tfloat y = floor( j / float( boneTextureWidth ) );\n\t\t\tfloat dx = 1.0 / float( boneTextureWidth );\n\t\t\tfloat dy = 1.0 / float( boneTextureHeight );\n\t\t\ty = dy * ( y + 0.5 );\n\t\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\n\t\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\n\t\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\n\t\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\n\t\t\tmat4 bone = mat4( v1, v2, v3, v4 );\n\t\t\treturn bone;\n\t\t}\n\t#else\n\t\tuniform mat4 boneMatrices[ MAX_BONES ];\n\t\tmat4 getBoneMatrix( const in float i ) {\n\t\t\tmat4 bone = boneMatrices[ int(i) ];\n\t\t\treturn bone;\n\t\t}\n\t#endif\n#endif\n";

  var skinning_vertex = "#ifdef USE_SKINNING\n\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n\tvec4 skinned = vec4( 0.0 );\n\tskinned += boneMatX * skinVertex * skinWeight.x;\n\tskinned += boneMatY * skinVertex * skinWeight.y;\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\n\tskinned += boneMatW * skinVertex * skinWeight.w;\n\tskinned  = bindMatrixInverse * skinned;\n#endif\n";

  var skinnormal_vertex = "#ifdef USE_SKINNING\n\tmat4 skinMatrix = mat4( 0.0 );\n\tskinMatrix += skinWeight.x * boneMatX;\n\tskinMatrix += skinWeight.y * boneMatY;\n\tskinMatrix += skinWeight.z * boneMatZ;\n\tskinMatrix += skinWeight.w * boneMatW;\n\tskinMatrix  = bindMatrixInverse * skinMatrix * bindMatrix;\n\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n#endif\n";

  var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\n\tspecularStrength = texelSpecular.r;\n#else\n\tspecularStrength = 1.0;\n#endif";

  var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n\tuniform sampler2D specularMap;\n#endif";

  var tonemapping_fragment = "#if defined( TONE_MAPPING )\n  gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif\n";

  var tonemapping_pars_fragment = "#define saturate(a) clamp( a, 0.0, 1.0 )\nuniform float toneMappingExposure;\nuniform float toneMappingWhitePoint;\nvec3 LinearToneMapping( vec3 color ) {\n  return toneMappingExposure * color;\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n  color *= toneMappingExposure;\n  return saturate( color / ( vec3( 1.0 ) + color ) );\n}\n#define Uncharted2Helper( x ) max( ( ( x * ( 0.15 * x + 0.10 * 0.50 ) + 0.20 * 0.02 ) / ( x * ( 0.15 * x + 0.50 ) + 0.20 * 0.30 ) ) - 0.02 / 0.30, vec3( 0.0 ) )\nvec3 Uncharted2ToneMapping( vec3 color ) {\n  color *= toneMappingExposure;\n  return saturate( Uncharted2Helper( color ) / Uncharted2Helper( vec3( toneMappingWhitePoint ) ) );\n}\nvec3 OptimizedCineonToneMapping( vec3 color ) {\n  color *= toneMappingExposure;\n  color = max( vec3( 0.0 ), color - 0.004 );\n  return pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\n";

  var uv_pars_fragment = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\n\tvarying vec2 vUv;\n#endif";

  var uv_pars_vertex = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\n\tvarying vec2 vUv;\n\tuniform vec4 offsetRepeat;\n#endif\n";

  var uv_vertex = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\n\tvUv = uv * offsetRepeat.zw + offsetRepeat.xy;\n#endif";

  var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvarying vec2 vUv2;\n#endif";

  var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tattribute vec2 uv2;\n\tvarying vec2 vUv2;\n#endif";

  var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvUv2 = uv2;\n#endif";

  var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( PHONG ) || defined( PHYSICAL ) || defined( LAMBERT ) || defined ( USE_SHADOWMAP )\n\t#ifdef USE_SKINNING\n\t\tvec4 worldPosition = modelMatrix * skinned;\n\t#else\n\t\tvec4 worldPosition = modelMatrix * vec4( transformed, 1.0 );\n\t#endif\n#endif\n";

  var cube_frag = "uniform samplerCube tCube;\nuniform float tFlip;\nuniform float opacity;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tgl_FragColor = textureCube( tCube, vec3( tFlip * vWorldPosition.x, vWorldPosition.yz ) );\n\tgl_FragColor.a *= opacity;\n}\n";

  var cube_vert = "varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n";

  var depth_frag = "#if DEPTH_PACKING == 3200\n\tuniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#if DEPTH_PACKING == 3200\n\t\tdiffuseColor.a = opacity;\n\t#endif\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <logdepthbuf_fragment>\n\t#if DEPTH_PACKING == 3200\n\t\tgl_FragColor = vec4( vec3( gl_FragCoord.z ), opacity );\n\t#elif DEPTH_PACKING == 3201\n\t\tgl_FragColor = packDepthToRGBA( gl_FragCoord.z );\n\t#endif\n}\n";

  var depth_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#include <begin_vertex>\n\t#include <displacementmap_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n}\n";

  var distanceRGBA_frag = "uniform vec3 lightPos;\nvarying vec4 vWorldPosition;\n#include <common>\n#include <packing>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n\t#include <clipping_planes_fragment>\n\tgl_FragColor = packDepthToRGBA( length( vWorldPosition.xyz - lightPos.xyz ) / 1000.0 );\n}\n";

  var distanceRGBA_vert = "varying vec4 vWorldPosition;\n#include <common>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <skinbase_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition;\n}\n";

  var equirect_frag = "uniform sampler2D tEquirect;\nuniform float tFlip;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = saturate( tFlip * direction.y * -0.5 + 0.5 );\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n";

  var equirect_vert = "varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n";

  var linedashed_frag = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\n\t\tdiscard;\n\t}\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <color_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";

  var linedashed_vert = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\tvLineDistance = scale * lineDistance;\n\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\n\tgl_Position = projectionMatrix * mvPosition;\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n}\n";

  var meshbasic_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\tReflectedLight reflectedLight;\n\treflectedLight.directDiffuse = vec3( 0.0 );\n\treflectedLight.directSpecular = vec3( 0.0 );\n\treflectedLight.indirectDiffuse = diffuseColor.rgb;\n\treflectedLight.indirectSpecular = vec3( 0.0 );\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\n\t#include <normal_flip>\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";

  var meshbasic_vert = "#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_ENVMAP\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <envmap_vertex>\n}\n";

  var meshlambert_frag = "uniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\nvarying vec3 vLightFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n#endif\n#include <common>\n#include <packing>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <bsdfs>\n#include <lights_pars>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <emissivemap_fragment>\n\treflectedLight.indirectDiffuse = getAmbientLightIrradiance( ambientLightColor );\n\t#include <lightmap_fragment>\n\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\n\t#else\n\t\treflectedLight.directDiffuse = vLightFront;\n\t#endif\n\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\t#include <normal_flip>\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";

  var meshlambert_vert = "#define LAMBERT\nvarying vec3 vLightFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <bsdfs>\n#include <lights_pars>\n#include <color_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <lights_lambert_vertex>\n\t#include <shadowmap_vertex>\n}\n";

  var meshphong_frag = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <normal_flip>\n\t#include <normal_fragment>\n\t#include <emissivemap_fragment>\n\t#include <lights_phong_fragment>\n\t#include <lights_template>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";

  var meshphong_vert = "#define PHONG\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <displacementmap_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <shadowmap_vertex>\n}\n";

  var meshphysical_frag = "#define PHYSICAL\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifndef STANDARD\n\tuniform float clearCoat;\n\tuniform float clearCoatRoughness;\n#endif\nuniform float envMapIntensity;\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <packing>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <cube_uv_reflection_fragment>\n#include <lights_pars>\n#include <lights_physical_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <roughnessmap_fragment>\n\t#include <metalnessmap_fragment>\n\t#include <normal_flip>\n\t#include <normal_fragment>\n\t#include <emissivemap_fragment>\n\t#include <lights_physical_fragment>\n\t#include <lights_template>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";

  var meshphysical_vert = "#define PHYSICAL\nvarying vec3 vViewPosition;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n#endif\n\t#include <begin_vertex>\n\t#include <displacementmap_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n}\n";

  var normal_frag = "uniform float opacity;\nvarying vec3 vNormal;\n#include <common>\n#include <packing>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tgl_FragColor = vec4( packNormalToRGB( vNormal ), opacity );\n\t#include <logdepthbuf_fragment>\n}\n";

  var normal_vert = "varying vec3 vNormal;\n#include <common>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\tvNormal = normalize( normalMatrix * normal );\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n}\n";

  var points_frag = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_particle_fragment>\n\t#include <color_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n";

  var points_vert = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\t#ifdef USE_SIZEATTENUATION\n\t\tgl_PointSize = size * ( scale / - mvPosition.z );\n\t#else\n\t\tgl_PointSize = size;\n\t#endif\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n}\n";

  var shadow_frag = "uniform float opacity;\n#include <common>\n#include <packing>\n#include <bsdfs>\n#include <lights_pars>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n\tgl_FragColor = vec4( 0.0, 0.0, 0.0, opacity * ( 1.0  - getShadowMask() ) );\n}\n";

  var shadow_vert = "#include <shadowmap_pars_vertex>\nvoid main() {\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n}\n";

  var ShaderChunk = {
  	alphamap_fragment: alphamap_fragment,
  	alphamap_pars_fragment: alphamap_pars_fragment,
  	alphatest_fragment: alphatest_fragment,
  	aomap_fragment: aomap_fragment,
  	aomap_pars_fragment: aomap_pars_fragment,
  	begin_vertex: begin_vertex,
  	beginnormal_vertex: beginnormal_vertex,
  	bsdfs: bsdfs,
  	bumpmap_pars_fragment: bumpmap_pars_fragment,
  	clipping_planes_fragment: clipping_planes_fragment,
  	clipping_planes_pars_fragment: clipping_planes_pars_fragment,
  	clipping_planes_pars_vertex: clipping_planes_pars_vertex,
  	clipping_planes_vertex: clipping_planes_vertex,
  	color_fragment: color_fragment,
  	color_pars_fragment: color_pars_fragment,
  	color_pars_vertex: color_pars_vertex,
  	color_vertex: color_vertex,
  	common: common,
  	cube_uv_reflection_fragment: cube_uv_reflection_fragment,
  	defaultnormal_vertex: defaultnormal_vertex,
  	displacementmap_pars_vertex: displacementmap_pars_vertex,
  	displacementmap_vertex: displacementmap_vertex,
  	emissivemap_fragment: emissivemap_fragment,
  	emissivemap_pars_fragment: emissivemap_pars_fragment,
  	encodings_fragment: encodings_fragment,
  	encodings_pars_fragment: encodings_pars_fragment,
  	envmap_fragment: envmap_fragment,
  	envmap_pars_fragment: envmap_pars_fragment,
  	envmap_pars_vertex: envmap_pars_vertex,
  	envmap_vertex: envmap_vertex,
  	fog_fragment: fog_fragment,
  	fog_pars_fragment: fog_pars_fragment,
  	lightmap_fragment: lightmap_fragment,
  	lightmap_pars_fragment: lightmap_pars_fragment,
  	lights_lambert_vertex: lights_lambert_vertex,
  	lights_pars: lights_pars,
  	lights_phong_fragment: lights_phong_fragment,
  	lights_phong_pars_fragment: lights_phong_pars_fragment,
  	lights_physical_fragment: lights_physical_fragment,
  	lights_physical_pars_fragment: lights_physical_pars_fragment,
  	lights_template: lights_template,
  	logdepthbuf_fragment: logdepthbuf_fragment,
  	logdepthbuf_pars_fragment: logdepthbuf_pars_fragment,
  	logdepthbuf_pars_vertex: logdepthbuf_pars_vertex,
  	logdepthbuf_vertex: logdepthbuf_vertex,
  	map_fragment: map_fragment,
  	map_pars_fragment: map_pars_fragment,
  	map_particle_fragment: map_particle_fragment,
  	map_particle_pars_fragment: map_particle_pars_fragment,
  	metalnessmap_fragment: metalnessmap_fragment,
  	metalnessmap_pars_fragment: metalnessmap_pars_fragment,
  	morphnormal_vertex: morphnormal_vertex,
  	morphtarget_pars_vertex: morphtarget_pars_vertex,
  	morphtarget_vertex: morphtarget_vertex,
  	normal_flip: normal_flip,
  	normal_fragment: normal_fragment,
  	normalmap_pars_fragment: normalmap_pars_fragment,
  	packing: packing,
  	premultiplied_alpha_fragment: premultiplied_alpha_fragment,
  	project_vertex: project_vertex,
  	roughnessmap_fragment: roughnessmap_fragment,
  	roughnessmap_pars_fragment: roughnessmap_pars_fragment,
  	shadowmap_pars_fragment: shadowmap_pars_fragment,
  	shadowmap_pars_vertex: shadowmap_pars_vertex,
  	shadowmap_vertex: shadowmap_vertex,
  	shadowmask_pars_fragment: shadowmask_pars_fragment,
  	skinbase_vertex: skinbase_vertex,
  	skinning_pars_vertex: skinning_pars_vertex,
  	skinning_vertex: skinning_vertex,
  	skinnormal_vertex: skinnormal_vertex,
  	specularmap_fragment: specularmap_fragment,
  	specularmap_pars_fragment: specularmap_pars_fragment,
  	tonemapping_fragment: tonemapping_fragment,
  	tonemapping_pars_fragment: tonemapping_pars_fragment,
  	uv_pars_fragment: uv_pars_fragment,
  	uv_pars_vertex: uv_pars_vertex,
  	uv_vertex: uv_vertex,
  	uv2_pars_fragment: uv2_pars_fragment,
  	uv2_pars_vertex: uv2_pars_vertex,
  	uv2_vertex: uv2_vertex,
  	worldpos_vertex: worldpos_vertex,

  	cube_frag: cube_frag,
  	cube_vert: cube_vert,
  	depth_frag: depth_frag,
  	depth_vert: depth_vert,
  	distanceRGBA_frag: distanceRGBA_frag,
  	distanceRGBA_vert: distanceRGBA_vert,
  	equirect_frag: equirect_frag,
  	equirect_vert: equirect_vert,
  	linedashed_frag: linedashed_frag,
  	linedashed_vert: linedashed_vert,
  	meshbasic_frag: meshbasic_frag,
  	meshbasic_vert: meshbasic_vert,
  	meshlambert_frag: meshlambert_frag,
  	meshlambert_vert: meshlambert_vert,
  	meshphong_frag: meshphong_frag,
  	meshphong_vert: meshphong_vert,
  	meshphysical_frag: meshphysical_frag,
  	meshphysical_vert: meshphysical_vert,
  	normal_frag: normal_frag,
  	normal_vert: normal_vert,
  	points_frag: points_frag,
  	points_vert: points_vert,
  	shadow_frag: shadow_frag,
  	shadow_vert: shadow_vert
  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function Color( r, g, b ) {

  	if ( g === undefined && b === undefined ) {

  		// r is THREE.Color, hex or string
  		return this.set( r );

  	}

  	return this.setRGB( r, g, b );

  };

  Color.prototype = {

  	constructor: Color,

  	isColor: true,

  	r: 1, g: 1, b: 1,

  	set: function ( value ) {

  		if ( (value && value.isColor) ) {

  			this.copy( value );

  		} else if ( typeof value === 'number' ) {

  			this.setHex( value );

  		} else if ( typeof value === 'string' ) {

  			this.setStyle( value );

  		}

  		return this;

  	},

  	setScalar: function ( scalar ) {

  		this.r = scalar;
  		this.g = scalar;
  		this.b = scalar;

  	},

  	setHex: function ( hex ) {

  		hex = Math.floor( hex );

  		this.r = ( hex >> 16 & 255 ) / 255;
  		this.g = ( hex >> 8 & 255 ) / 255;
  		this.b = ( hex & 255 ) / 255;

  		return this;

  	},

  	setRGB: function ( r, g, b ) {

  		this.r = r;
  		this.g = g;
  		this.b = b;

  		return this;

  	},

  	setHSL: function () {

  		function hue2rgb( p, q, t ) {

  			if ( t < 0 ) t += 1;
  			if ( t > 1 ) t -= 1;
  			if ( t < 1 / 6 ) return p + ( q - p ) * 6 * t;
  			if ( t < 1 / 2 ) return q;
  			if ( t < 2 / 3 ) return p + ( q - p ) * 6 * ( 2 / 3 - t );
  			return p;

  		}

  		return function setHSL( h, s, l ) {

  			// h,s,l ranges are in 0.0 - 1.0
  			h = exports.Math.euclideanModulo( h, 1 );
  			s = exports.Math.clamp( s, 0, 1 );
  			l = exports.Math.clamp( l, 0, 1 );

  			if ( s === 0 ) {

  				this.r = this.g = this.b = l;

  			} else {

  				var p = l <= 0.5 ? l * ( 1 + s ) : l + s - ( l * s );
  				var q = ( 2 * l ) - p;

  				this.r = hue2rgb( q, p, h + 1 / 3 );
  				this.g = hue2rgb( q, p, h );
  				this.b = hue2rgb( q, p, h - 1 / 3 );

  			}

  			return this;

  		};

  	}(),

  	setStyle: function ( style ) {

  		function handleAlpha( string ) {

  			if ( string === undefined ) return;

  			if ( parseFloat( string ) < 1 ) {

  				console.warn( 'THREE.Color: Alpha component of ' + style + ' will be ignored.' );

  			}

  		}


  		var m;

  		if ( m = /^((?:rgb|hsl)a?)\(\s*([^\)]*)\)/.exec( style ) ) {

  			// rgb / hsl

  			var color;
  			var name = m[ 1 ];
  			var components = m[ 2 ];

  			switch ( name ) {

  				case 'rgb':
  				case 'rgba':

  					if ( color = /^(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

  						// rgb(255,0,0) rgba(255,0,0,0.5)
  						this.r = Math.min( 255, parseInt( color[ 1 ], 10 ) ) / 255;
  						this.g = Math.min( 255, parseInt( color[ 2 ], 10 ) ) / 255;
  						this.b = Math.min( 255, parseInt( color[ 3 ], 10 ) ) / 255;

  						handleAlpha( color[ 5 ] );

  						return this;

  					}

  					if ( color = /^(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

  						// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
  						this.r = Math.min( 100, parseInt( color[ 1 ], 10 ) ) / 100;
  						this.g = Math.min( 100, parseInt( color[ 2 ], 10 ) ) / 100;
  						this.b = Math.min( 100, parseInt( color[ 3 ], 10 ) ) / 100;

  						handleAlpha( color[ 5 ] );

  						return this;

  					}

  					break;

  				case 'hsl':
  				case 'hsla':

  					if ( color = /^([0-9]*\.?[0-9]+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

  						// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
  						var h = parseFloat( color[ 1 ] ) / 360;
  						var s = parseInt( color[ 2 ], 10 ) / 100;
  						var l = parseInt( color[ 3 ], 10 ) / 100;

  						handleAlpha( color[ 5 ] );

  						return this.setHSL( h, s, l );

  					}

  					break;

  			}

  		} else if ( m = /^\#([A-Fa-f0-9]+)$/.exec( style ) ) {

  			// hex color

  			var hex = m[ 1 ];
  			var size = hex.length;

  			if ( size === 3 ) {

  				// #ff0
  				this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 0 ), 16 ) / 255;
  				this.g = parseInt( hex.charAt( 1 ) + hex.charAt( 1 ), 16 ) / 255;
  				this.b = parseInt( hex.charAt( 2 ) + hex.charAt( 2 ), 16 ) / 255;

  				return this;

  			} else if ( size === 6 ) {

  				// #ff0000
  				this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 1 ), 16 ) / 255;
  				this.g = parseInt( hex.charAt( 2 ) + hex.charAt( 3 ), 16 ) / 255;
  				this.b = parseInt( hex.charAt( 4 ) + hex.charAt( 5 ), 16 ) / 255;

  				return this;

  			}

  		}

  		if ( style && style.length > 0 ) {

  			// color keywords
  			var hex = exports.ColorKeywords[ style ];

  			if ( hex !== undefined ) {

  				// red
  				this.setHex( hex );

  			} else {

  				// unknown color
  				console.warn( 'THREE.Color: Unknown color ' + style );

  			}

  		}

  		return this;

  	},

  	clone: function () {

  		return new this.constructor( this.r, this.g, this.b );

  	},

  	copy: function ( color ) {

  		this.r = color.r;
  		this.g = color.g;
  		this.b = color.b;

  		return this;

  	},

  	copyGammaToLinear: function ( color, gammaFactor ) {

  		if ( gammaFactor === undefined ) gammaFactor = 2.0;

  		this.r = Math.pow( color.r, gammaFactor );
  		this.g = Math.pow( color.g, gammaFactor );
  		this.b = Math.pow( color.b, gammaFactor );

  		return this;

  	},

  	copyLinearToGamma: function ( color, gammaFactor ) {

  		if ( gammaFactor === undefined ) gammaFactor = 2.0;

  		var safeInverse = ( gammaFactor > 0 ) ? ( 1.0 / gammaFactor ) : 1.0;

  		this.r = Math.pow( color.r, safeInverse );
  		this.g = Math.pow( color.g, safeInverse );
  		this.b = Math.pow( color.b, safeInverse );

  		return this;

  	},

  	convertGammaToLinear: function () {

  		var r = this.r, g = this.g, b = this.b;

  		this.r = r * r;
  		this.g = g * g;
  		this.b = b * b;

  		return this;

  	},

  	convertLinearToGamma: function () {

  		this.r = Math.sqrt( this.r );
  		this.g = Math.sqrt( this.g );
  		this.b = Math.sqrt( this.b );

  		return this;

  	},

  	getHex: function () {

  		return ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;

  	},

  	getHexString: function () {

  		return ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );

  	},

  	getHSL: function ( optionalTarget ) {

  		// h,s,l ranges are in 0.0 - 1.0

  		var hsl = optionalTarget || { h: 0, s: 0, l: 0 };

  		var r = this.r, g = this.g, b = this.b;

  		var max = Math.max( r, g, b );
  		var min = Math.min( r, g, b );

  		var hue, saturation;
  		var lightness = ( min + max ) / 2.0;

  		if ( min === max ) {

  			hue = 0;
  			saturation = 0;

  		} else {

  			var delta = max - min;

  			saturation = lightness <= 0.5 ? delta / ( max + min ) : delta / ( 2 - max - min );

  			switch ( max ) {

  				case r: hue = ( g - b ) / delta + ( g < b ? 6 : 0 ); break;
  				case g: hue = ( b - r ) / delta + 2; break;
  				case b: hue = ( r - g ) / delta + 4; break;

  			}

  			hue /= 6;

  		}

  		hsl.h = hue;
  		hsl.s = saturation;
  		hsl.l = lightness;

  		return hsl;

  	},

  	getStyle: function () {

  		return 'rgb(' + ( ( this.r * 255 ) | 0 ) + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';

  	},

  	offsetHSL: function ( h, s, l ) {

  		var hsl = this.getHSL();

  		hsl.h += h; hsl.s += s; hsl.l += l;

  		this.setHSL( hsl.h, hsl.s, hsl.l );

  		return this;

  	},

  	add: function ( color ) {

  		this.r += color.r;
  		this.g += color.g;
  		this.b += color.b;

  		return this;

  	},

  	addColors: function ( color1, color2 ) {

  		this.r = color1.r + color2.r;
  		this.g = color1.g + color2.g;
  		this.b = color1.b + color2.b;

  		return this;

  	},

  	addScalar: function ( s ) {

  		this.r += s;
  		this.g += s;
  		this.b += s;

  		return this;

  	},

  	sub: function( color ) {

  		this.r = Math.max( 0, this.r - color.r );
  		this.g = Math.max( 0, this.g - color.g );
  		this.b = Math.max( 0, this.b - color.b );

  		return this;

  	},

  	multiply: function ( color ) {

  		this.r *= color.r;
  		this.g *= color.g;
  		this.b *= color.b;

  		return this;

  	},

  	multiplyScalar: function ( s ) {

  		this.r *= s;
  		this.g *= s;
  		this.b *= s;

  		return this;

  	},

  	lerp: function ( color, alpha ) {

  		this.r += ( color.r - this.r ) * alpha;
  		this.g += ( color.g - this.g ) * alpha;
  		this.b += ( color.b - this.b ) * alpha;

  		return this;

  	},

  	equals: function ( c ) {

  		return ( c.r === this.r ) && ( c.g === this.g ) && ( c.b === this.b );

  	},

  	fromArray: function ( array, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this.r = array[ offset ];
  		this.g = array[ offset + 1 ];
  		this.b = array[ offset + 2 ];

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		array[ offset ] = this.r;
  		array[ offset + 1 ] = this.g;
  		array[ offset + 2 ] = this.b;

  		return array;

  	}

  };

  exports.ColorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,
  'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,
  'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,
  'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,
  'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,
  'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,
  'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,
  'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,
  'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,
  'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,
  'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,
  'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,
  'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,
  'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,
  'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,
  'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,
  'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,
  'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,
  'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,
  'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,
  'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,
  'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,
  'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,
  'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };

  /**
   * Uniforms library for shared webgl shaders
   */

  exports.UniformsLib = {

  	common: {

  		"diffuse": { value: new Color( 0xeeeeee ) },
  		"opacity": { value: 1.0 },

  		"map": { value: null },
  		"offsetRepeat": { value: new Vector4( 0, 0, 1, 1 ) },

  		"specularMap": { value: null },
  		"alphaMap": { value: null },

  		"envMap": { value: null },
  		"flipEnvMap": { value: - 1 },
  		"reflectivity": { value: 1.0 },
  		"refractionRatio": { value: 0.98 }

  	},

  	aomap: {

  		"aoMap": { value: null },
  		"aoMapIntensity": { value: 1 }

  	},

  	lightmap: {

  		"lightMap": { value: null },
  		"lightMapIntensity": { value: 1 }

  	},

  	emissivemap: {

  		"emissiveMap": { value: null }

  	},

  	bumpmap: {

  		"bumpMap": { value: null },
  		"bumpScale": { value: 1 }

  	},

  	normalmap: {

  		"normalMap": { value: null },
  		"normalScale": { value: new Vector2( 1, 1 ) }

  	},

  	displacementmap: {

  		"displacementMap": { value: null },
  		"displacementScale": { value: 1 },
  		"displacementBias": { value: 0 }

  	},

  	roughnessmap: {

  		"roughnessMap": { value: null }

  	},

  	metalnessmap: {

  		"metalnessMap": { value: null }

  	},

  	fog: {

  		"fogDensity": { value: 0.00025 },
  		"fogNear": { value: 1 },
  		"fogFar": { value: 2000 },
  		"fogColor": { value: new Color( 0xffffff ) }

  	},

  	lights: {

  		"ambientLightColor": { value: [] },

  		"directionalLights": { value: [], properties: {
  			"direction": {},
  			"color": {},

  			"shadow": {},
  			"shadowBias": {},
  			"shadowRadius": {},
  			"shadowMapSize": {}
  		} },

  		"directionalShadowMap": { value: [] },
  		"directionalShadowMatrix": { value: [] },

  		"spotLights": { value: [], properties: {
  			"color": {},
  			"position": {},
  			"direction": {},
  			"distance": {},
  			"coneCos": {},
  			"penumbraCos": {},
  			"decay": {},

  			"shadow": {},
  			"shadowBias": {},
  			"shadowRadius": {},
  			"shadowMapSize": {}
  		} },

  		"spotShadowMap": { value: [] },
  		"spotShadowMatrix": { value: [] },

  		"pointLights": { value: [], properties: {
  			"color": {},
  			"position": {},
  			"decay": {},
  			"distance": {},

  			"shadow": {},
  			"shadowBias": {},
  			"shadowRadius": {},
  			"shadowMapSize": {}
  		} },

  		"pointShadowMap": { value: [] },
  		"pointShadowMatrix": { value: [] },

  		"hemisphereLights": { value: [], properties: {
  			"direction": {},
  			"skyColor": {},
  			"groundColor": {}
  		} }

  	},

  	points: {

  		"diffuse": { value: new Color( 0xeeeeee ) },
  		"opacity": { value: 1.0 },
  		"size": { value: 1.0 },
  		"scale": { value: 1.0 },
  		"map": { value: null },
  		"offsetRepeat": { value: new Vector4( 0, 0, 1, 1 ) }

  	}

  };

  /**
   * Webgl Shader Library for three.js
   *
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   * @author mikael emtinger / http://gomo.se/
   */


  exports.ShaderLib = {

  	'basic': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'common' ],
  			exports.UniformsLib[ 'aomap' ],
  			exports.UniformsLib[ 'fog' ]

  		] ),

  		vertexShader: ShaderChunk[ 'meshbasic_vert' ],
  		fragmentShader: ShaderChunk[ 'meshbasic_frag' ]

  	},

  	'lambert': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'common' ],
  			exports.UniformsLib[ 'aomap' ],
  			exports.UniformsLib[ 'lightmap' ],
  			exports.UniformsLib[ 'emissivemap' ],
  			exports.UniformsLib[ 'fog' ],
  			exports.UniformsLib[ 'lights' ],

  			{
  				"emissive" : { value: new Color( 0x000000 ) }
  			}

  		] ),

  		vertexShader: ShaderChunk[ 'meshlambert_vert' ],
  		fragmentShader: ShaderChunk[ 'meshlambert_frag' ]

  	},

  	'phong': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'common' ],
  			exports.UniformsLib[ 'aomap' ],
  			exports.UniformsLib[ 'lightmap' ],
  			exports.UniformsLib[ 'emissivemap' ],
  			exports.UniformsLib[ 'bumpmap' ],
  			exports.UniformsLib[ 'normalmap' ],
  			exports.UniformsLib[ 'displacementmap' ],
  			exports.UniformsLib[ 'fog' ],
  			exports.UniformsLib[ 'lights' ],

  			{
  				"emissive" : { value: new Color( 0x000000 ) },
  				"specular" : { value: new Color( 0x111111 ) },
  				"shininess": { value: 30 }
  			}

  		] ),

  		vertexShader: ShaderChunk[ 'meshphong_vert' ],
  		fragmentShader: ShaderChunk[ 'meshphong_frag' ]

  	},

  	'standard': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'common' ],
  			exports.UniformsLib[ 'aomap' ],
  			exports.UniformsLib[ 'lightmap' ],
  			exports.UniformsLib[ 'emissivemap' ],
  			exports.UniformsLib[ 'bumpmap' ],
  			exports.UniformsLib[ 'normalmap' ],
  			exports.UniformsLib[ 'displacementmap' ],
  			exports.UniformsLib[ 'roughnessmap' ],
  			exports.UniformsLib[ 'metalnessmap' ],
  			exports.UniformsLib[ 'fog' ],
  			exports.UniformsLib[ 'lights' ],

  			{
  				"emissive" : { value: new Color( 0x000000 ) },
  				"roughness": { value: 0.5 },
  				"metalness": { value: 0 },
  				"envMapIntensity" : { value: 1 }, // temporary
  			}

  		] ),

  		vertexShader: ShaderChunk[ 'meshphysical_vert' ],
  		fragmentShader: ShaderChunk[ 'meshphysical_frag' ]

  	},

  	'points': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'points' ],
  			exports.UniformsLib[ 'fog' ]

  		] ),

  		vertexShader: ShaderChunk[ 'points_vert' ],
  		fragmentShader: ShaderChunk[ 'points_frag' ]

  	},

  	'dashed': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'common' ],
  			exports.UniformsLib[ 'fog' ],

  			{
  				"scale"    : { value: 1 },
  				"dashSize" : { value: 1 },
  				"totalSize": { value: 2 }
  			}

  		] ),

  		vertexShader: ShaderChunk[ 'linedashed_vert' ],
  		fragmentShader: ShaderChunk[ 'linedashed_frag' ]

  	},

  	'depth': {

  		uniforms: exports.UniformsUtils.merge( [

  			exports.UniformsLib[ 'common' ],
  			exports.UniformsLib[ 'displacementmap' ]

  		] ),

  		vertexShader: ShaderChunk[ 'depth_vert' ],
  		fragmentShader: ShaderChunk[ 'depth_frag' ]

  	},

  	'normal': {

  		uniforms: {

  			"opacity" : { value: 1.0 }

  		},

  		vertexShader: ShaderChunk[ 'normal_vert' ],
  		fragmentShader: ShaderChunk[ 'normal_frag' ]

  	},

  	/* -------------------------------------------------------------------------
  	//	Cube map shader
  	 ------------------------------------------------------------------------- */

  	'cube': {

  		uniforms: {
  			"tCube": { value: null },
  			"tFlip": { value: - 1 },
  			"opacity": { value: 1.0 }
  		},

  		vertexShader: ShaderChunk[ 'cube_vert' ],
  		fragmentShader: ShaderChunk[ 'cube_frag' ]

  	},

  	/* -------------------------------------------------------------------------
  	//	Cube map shader
  	 ------------------------------------------------------------------------- */

  	'equirect': {

  		uniforms: {
  			"tEquirect": { value: null },
  			"tFlip": { value: - 1 }
  		},

  		vertexShader: ShaderChunk[ 'equirect_vert' ],
  		fragmentShader: ShaderChunk[ 'equirect_frag' ]

  	},

  	'distanceRGBA': {

  		uniforms: {

  			"lightPos": { value: new Vector3() }

  		},

  		vertexShader: ShaderChunk[ 'distanceRGBA_vert' ],
  		fragmentShader: ShaderChunk[ 'distanceRGBA_frag' ]

  	}

  };

  exports.ShaderLib[ 'physical' ] = {

  	uniforms: exports.UniformsUtils.merge( [

  		exports.ShaderLib[ 'standard' ].uniforms,

  		{
  			"clearCoat": { value: 0 },
  			"clearCoatRoughness": { value: 0 }
  		}

  	] ),

  	vertexShader: ShaderChunk[ 'meshphysical_vert' ],
  	fragmentShader: ShaderChunk[ 'meshphysical_frag' ]

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   * @author bhouston / https://clara.io
   * @author WestLangley / http://github.com/WestLangley
   *
   * parameters = {
   *
   *  opacity: <float>,
   *
   *  map: new THREE.Texture( <Image> ),
   *
   *  alphaMap: new THREE.Texture( <Image> ),
   *
   *  displacementMap: new THREE.Texture( <Image> ),
   *  displacementScale: <float>,
   *  displacementBias: <float>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>
   * }
   */

  function MeshDepthMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'MeshDepthMaterial';

  	this.depthPacking = BasicDepthPacking;

  	this.skinning = false;
  	this.morphTargets = false;

  	this.map = null;

  	this.alphaMap = null;

  	this.displacementMap = null;
  	this.displacementScale = 1;
  	this.displacementBias = 0;

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;

  	this.fog = false;
  	this.lights = false;

  	this.setValues( parameters );

  };

  MeshDepthMaterial.prototype = Object.create( Material.prototype );
  MeshDepthMaterial.prototype.constructor = MeshDepthMaterial;

  MeshDepthMaterial.prototype.isMeshDepthMaterial = true;

  MeshDepthMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.depthPacking = source.depthPacking;

  	this.skinning = source.skinning;
  	this.morphTargets = source.morphTargets;

  	this.map = source.map;

  	this.alphaMap = source.alphaMap;

  	this.displacementMap = source.displacementMap;
  	this.displacementScale = source.displacementScale;
  	this.displacementBias = source.displacementBias;

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;

  	return this;

  };

  /**
   * @author bhouston / http://clara.io
   * @author WestLangley / http://github.com/WestLangley
   */

  function Box3( min, max ) {

  	this.min = ( min !== undefined ) ? min : new Vector3( + Infinity, + Infinity, + Infinity );
  	this.max = ( max !== undefined ) ? max : new Vector3( - Infinity, - Infinity, - Infinity );

  };

  Box3.prototype = {

  	constructor: Box3,

  	isBox3: true,

  	set: function ( min, max ) {

  		this.min.copy( min );
  		this.max.copy( max );

  		return this;

  	},

  	setFromArray: function ( array ) {

  		var minX = + Infinity;
  		var minY = + Infinity;
  		var minZ = + Infinity;

  		var maxX = - Infinity;
  		var maxY = - Infinity;
  		var maxZ = - Infinity;

  		for ( var i = 0, l = array.length; i < l; i += 3 ) {

  			var x = array[ i ];
  			var y = array[ i + 1 ];
  			var z = array[ i + 2 ];

  			if ( x < minX ) minX = x;
  			if ( y < minY ) minY = y;
  			if ( z < minZ ) minZ = z;

  			if ( x > maxX ) maxX = x;
  			if ( y > maxY ) maxY = y;
  			if ( z > maxZ ) maxZ = z;

  		}

  		this.min.set( minX, minY, minZ );
  		this.max.set( maxX, maxY, maxZ );

  	},

  	setFromPoints: function ( points ) {

  		this.makeEmpty();

  		for ( var i = 0, il = points.length; i < il; i ++ ) {

  			this.expandByPoint( points[ i ] );

  		}

  		return this;

  	},

  	setFromCenterAndSize: function () {

  		var v1 = new Vector3();

  		return function setFromCenterAndSize( center, size ) {

  			var halfSize = v1.copy( size ).multiplyScalar( 0.5 );

  			this.min.copy( center ).sub( halfSize );
  			this.max.copy( center ).add( halfSize );

  			return this;

  		};

  	}(),

  	setFromObject: function () {

  		// Computes the world-axis-aligned bounding box of an object (including its children),
  		// accounting for both the object's, and children's, world transforms

  		var v1 = new Vector3();

  		return function setFromObject( object ) {

  			var scope = this;

  			object.updateMatrixWorld( true );

  			this.makeEmpty();

  			object.traverse( function ( node ) {

  				var geometry = node.geometry;

  				if ( geometry !== undefined ) {

  					if ( (geometry && geometry.isGeometry) ) {

  						var vertices = geometry.vertices;

  						for ( var i = 0, il = vertices.length; i < il; i ++ ) {

  							v1.copy( vertices[ i ] );
  							v1.applyMatrix4( node.matrixWorld );

  							scope.expandByPoint( v1 );

  						}

  					} else if ( (geometry && geometry.isBufferGeometry) ) {

  						var attribute = geometry.attributes.position;

  						if ( attribute !== undefined ) {

  							var array, offset, stride;

  							if ( (attribute && attribute.isInterleavedBufferAttribute) ) {

  								array = attribute.data.array;
  								offset = attribute.offset;
  								stride = attribute.data.stride;

  							} else {

  								array = attribute.array;
  								offset = 0;
  								stride = 3;

  							}

  							for ( var i = offset, il = array.length; i < il; i += stride ) {

  								v1.fromArray( array, i );
  								v1.applyMatrix4( node.matrixWorld );

  								scope.expandByPoint( v1 );

  							}

  						}

  					}

  				}

  			} );

  			return this;

  		};

  	}(),

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( box ) {

  		this.min.copy( box.min );
  		this.max.copy( box.max );

  		return this;

  	},

  	makeEmpty: function () {

  		this.min.x = this.min.y = this.min.z = + Infinity;
  		this.max.x = this.max.y = this.max.z = - Infinity;

  		return this;

  	},

  	isEmpty: function () {

  		// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

  		return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ) || ( this.max.z < this.min.z );

  	},

  	center: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.addVectors( this.min, this.max ).multiplyScalar( 0.5 );

  	},

  	size: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.subVectors( this.max, this.min );

  	},

  	expandByPoint: function ( point ) {

  		this.min.min( point );
  		this.max.max( point );

  		return this;

  	},

  	expandByVector: function ( vector ) {

  		this.min.sub( vector );
  		this.max.add( vector );

  		return this;

  	},

  	expandByScalar: function ( scalar ) {

  		this.min.addScalar( - scalar );
  		this.max.addScalar( scalar );

  		return this;

  	},

  	containsPoint: function ( point ) {

  		if ( point.x < this.min.x || point.x > this.max.x ||
  				 point.y < this.min.y || point.y > this.max.y ||
  				 point.z < this.min.z || point.z > this.max.z ) {

  			return false;

  		}

  		return true;

  	},

  	containsBox: function ( box ) {

  		if ( ( this.min.x <= box.min.x ) && ( box.max.x <= this.max.x ) &&
  			 ( this.min.y <= box.min.y ) && ( box.max.y <= this.max.y ) &&
  			 ( this.min.z <= box.min.z ) && ( box.max.z <= this.max.z ) ) {

  			return true;

  		}

  		return false;

  	},

  	getParameter: function ( point, optionalTarget ) {

  		// This can potentially have a divide by zero if the box
  		// has a size dimension of 0.

  		var result = optionalTarget || new Vector3();

  		return result.set(
  			( point.x - this.min.x ) / ( this.max.x - this.min.x ),
  			( point.y - this.min.y ) / ( this.max.y - this.min.y ),
  			( point.z - this.min.z ) / ( this.max.z - this.min.z )
  		);

  	},

  	intersectsBox: function ( box ) {

  		// using 6 splitting planes to rule out intersections.

  		if ( box.max.x < this.min.x || box.min.x > this.max.x ||
  				 box.max.y < this.min.y || box.min.y > this.max.y ||
  				 box.max.z < this.min.z || box.min.z > this.max.z ) {

  			return false;

  		}

  		return true;

  	},

  	intersectsSphere: ( function () {

  		var closestPoint;

  		return function intersectsSphere( sphere ) {

  			if ( closestPoint === undefined ) closestPoint = new Vector3();

  			// Find the point on the AABB closest to the sphere center.
  			this.clampPoint( sphere.center, closestPoint );

  			// If that point is inside the sphere, the AABB and sphere intersect.
  			return closestPoint.distanceToSquared( sphere.center ) <= ( sphere.radius * sphere.radius );

  		};

  	} )(),

  	intersectsPlane: function ( plane ) {

  		// We compute the minimum and maximum dot product values. If those values
  		// are on the same side (back or front) of the plane, then there is no intersection.

  		var min, max;

  		if ( plane.normal.x > 0 ) {

  			min = plane.normal.x * this.min.x;
  			max = plane.normal.x * this.max.x;

  		} else {

  			min = plane.normal.x * this.max.x;
  			max = plane.normal.x * this.min.x;

  		}

  		if ( plane.normal.y > 0 ) {

  			min += plane.normal.y * this.min.y;
  			max += plane.normal.y * this.max.y;

  		} else {

  			min += plane.normal.y * this.max.y;
  			max += plane.normal.y * this.min.y;

  		}

  		if ( plane.normal.z > 0 ) {

  			min += plane.normal.z * this.min.z;
  			max += plane.normal.z * this.max.z;

  		} else {

  			min += plane.normal.z * this.max.z;
  			max += plane.normal.z * this.min.z;

  		}

  		return ( min <= plane.constant && max >= plane.constant );

  	},

  	clampPoint: function ( point, optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.copy( point ).clamp( this.min, this.max );

  	},

  	distanceToPoint: function () {

  		var v1 = new Vector3();

  		return function distanceToPoint( point ) {

  			var clampedPoint = v1.copy( point ).clamp( this.min, this.max );
  			return clampedPoint.sub( point ).length();

  		};

  	}(),

  	getBoundingSphere: function () {

  		var v1 = new Vector3();

  		return function getBoundingSphere( optionalTarget ) {

  			var result = optionalTarget || new Sphere();

  			result.center = this.center();
  			result.radius = this.size( v1 ).length() * 0.5;

  			return result;

  		};

  	}(),

  	intersect: function ( box ) {

  		this.min.max( box.min );
  		this.max.min( box.max );

  		// ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.
  		if( this.isEmpty() ) this.makeEmpty();

  		return this;

  	},

  	union: function ( box ) {

  		this.min.min( box.min );
  		this.max.max( box.max );

  		return this;

  	},

  	applyMatrix4: function () {

  		var points = [
  			new Vector3(),
  			new Vector3(),
  			new Vector3(),
  			new Vector3(),
  			new Vector3(),
  			new Vector3(),
  			new Vector3(),
  			new Vector3()
  		];

  		return function applyMatrix4( matrix ) {

  			// transform of empty box is an empty box.
  			if( this.isEmpty() ) return this;

  			// NOTE: I am using a binary pattern to specify all 2^3 combinations below
  			points[ 0 ].set( this.min.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 000
  			points[ 1 ].set( this.min.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 001
  			points[ 2 ].set( this.min.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 010
  			points[ 3 ].set( this.min.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 011
  			points[ 4 ].set( this.max.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 100
  			points[ 5 ].set( this.max.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 101
  			points[ 6 ].set( this.max.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 110
  			points[ 7 ].set( this.max.x, this.max.y, this.max.z ).applyMatrix4( matrix );	// 111

  			this.setFromPoints( points );

  			return this;

  		};

  	}(),

  	translate: function ( offset ) {

  		this.min.add( offset );
  		this.max.add( offset );

  		return this;

  	},

  	equals: function ( box ) {

  		return box.min.equals( this.min ) && box.max.equals( this.max );

  	}

  };

  /**
   * @author bhouston / http://clara.io
   * @author mrdoob / http://mrdoob.com/
   */

  function Sphere( center, radius ) {

  	this.center = ( center !== undefined ) ? center : new Vector3();
  	this.radius = ( radius !== undefined ) ? radius : 0;

  };

  Sphere.prototype = {

  	constructor: Sphere,

  	set: function ( center, radius ) {

  		this.center.copy( center );
  		this.radius = radius;

  		return this;

  	},

  	setFromPoints: function () {

  		var box = new Box3();

  		return function setFromPoints( points, optionalCenter ) {

  			var center = this.center;

  			if ( optionalCenter !== undefined ) {

  				center.copy( optionalCenter );

  			} else {

  				box.setFromPoints( points ).center( center );

  			}

  			var maxRadiusSq = 0;

  			for ( var i = 0, il = points.length; i < il; i ++ ) {

  				maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );

  			}

  			this.radius = Math.sqrt( maxRadiusSq );

  			return this;

  		};

  	}(),

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( sphere ) {

  		this.center.copy( sphere.center );
  		this.radius = sphere.radius;

  		return this;

  	},

  	empty: function () {

  		return ( this.radius <= 0 );

  	},

  	containsPoint: function ( point ) {

  		return ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );

  	},

  	distanceToPoint: function ( point ) {

  		return ( point.distanceTo( this.center ) - this.radius );

  	},

  	intersectsSphere: function ( sphere ) {

  		var radiusSum = this.radius + sphere.radius;

  		return sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );

  	},

  	intersectsBox: function ( box ) {

  		return box.intersectsSphere( this );

  	},

  	intersectsPlane: function ( plane ) {

  		// We use the following equation to compute the signed distance from
  		// the center of the sphere to the plane.
  		//
  		// distance = q * n - d
  		//
  		// If this distance is greater than the radius of the sphere,
  		// then there is no intersection.

  		return Math.abs( this.center.dot( plane.normal ) - plane.constant ) <= this.radius;

  	},

  	clampPoint: function ( point, optionalTarget ) {

  		var deltaLengthSq = this.center.distanceToSquared( point );

  		var result = optionalTarget || new Vector3();

  		result.copy( point );

  		if ( deltaLengthSq > ( this.radius * this.radius ) ) {

  			result.sub( this.center ).normalize();
  			result.multiplyScalar( this.radius ).add( this.center );

  		}

  		return result;

  	},

  	getBoundingBox: function ( optionalTarget ) {

  		var box = optionalTarget || new Box3();

  		box.set( this.center, this.center );
  		box.expandByScalar( this.radius );

  		return box;

  	},

  	applyMatrix4: function ( matrix ) {

  		this.center.applyMatrix4( matrix );
  		this.radius = this.radius * matrix.getMaxScaleOnAxis();

  		return this;

  	},

  	translate: function ( offset ) {

  		this.center.add( offset );

  		return this;

  	},

  	equals: function ( sphere ) {

  		return sphere.center.equals( this.center ) && ( sphere.radius === this.radius );

  	}

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author WestLangley / http://github.com/WestLangley
   * @author bhouston / http://clara.io
   * @author tschw
   */

  function Matrix3() {

  	this.elements = new Float32Array( [

  		1, 0, 0,
  		0, 1, 0,
  		0, 0, 1

  	] );

  	if ( arguments.length > 0 ) {

  		console.error( 'THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.' );

  	}

  };

  Matrix3.prototype = {

  	constructor: Matrix3,

  	isMatrix3: true,

  	set: function ( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {

  		var te = this.elements;

  		te[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;
  		te[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;
  		te[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;

  		return this;

  	},

  	identity: function () {

  		this.set(

  			1, 0, 0,
  			0, 1, 0,
  			0, 0, 1

  		);

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().fromArray( this.elements );

  	},

  	copy: function ( m ) {

  		var me = m.elements;

  		this.set(

  			me[ 0 ], me[ 3 ], me[ 6 ],
  			me[ 1 ], me[ 4 ], me[ 7 ],
  			me[ 2 ], me[ 5 ], me[ 8 ]

  		);

  		return this;

  	},

  	setFromMatrix4: function( m ) {

  		var me = m.elements;

  		this.set(

  			me[ 0 ], me[ 4 ], me[  8 ],
  			me[ 1 ], me[ 5 ], me[  9 ],
  			me[ 2 ], me[ 6 ], me[ 10 ]

  		);

  		return this;

  	},

  	applyToVector3Array: function () {

  		var v1;

  		return function applyToVector3Array( array, offset, length ) {

  			if ( v1 === undefined ) v1 = new Vector3();
  			if ( offset === undefined ) offset = 0;
  			if ( length === undefined ) length = array.length;

  			for ( var i = 0, j = offset; i < length; i += 3, j += 3 ) {

  				v1.fromArray( array, j );
  				v1.applyMatrix3( this );
  				v1.toArray( array, j );

  			}

  			return array;

  		};

  	}(),

  	applyToBuffer: function () {

  		var v1;

  		return function applyToBuffer( buffer, offset, length ) {

  			if ( v1 === undefined ) v1 = new Vector3();
  			if ( offset === undefined ) offset = 0;
  			if ( length === undefined ) length = buffer.length / buffer.itemSize;

  			for ( var i = 0, j = offset; i < length; i ++, j ++ ) {

  				v1.x = buffer.getX( j );
  				v1.y = buffer.getY( j );
  				v1.z = buffer.getZ( j );

  				v1.applyMatrix3( this );

  				buffer.setXYZ( v1.x, v1.y, v1.z );

  			}

  			return buffer;

  		};

  	}(),

  	multiplyScalar: function ( s ) {

  		var te = this.elements;

  		te[ 0 ] *= s; te[ 3 ] *= s; te[ 6 ] *= s;
  		te[ 1 ] *= s; te[ 4 ] *= s; te[ 7 ] *= s;
  		te[ 2 ] *= s; te[ 5 ] *= s; te[ 8 ] *= s;

  		return this;

  	},

  	determinant: function () {

  		var te = this.elements;

  		var a = te[ 0 ], b = te[ 1 ], c = te[ 2 ],
  			d = te[ 3 ], e = te[ 4 ], f = te[ 5 ],
  			g = te[ 6 ], h = te[ 7 ], i = te[ 8 ];

  		return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;

  	},

  	getInverse: function ( matrix, throwOnDegenerate ) {

  		if ( (matrix && matrix.isMatrix4) ) {

  			console.error( "THREE.Matrix3.getInverse no longer takes a Matrix4 argument." );

  		}

  		var me = matrix.elements,
  			te = this.elements,

  			n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ],
  			n12 = me[ 3 ], n22 = me[ 4 ], n32 = me[ 5 ],
  			n13 = me[ 6 ], n23 = me[ 7 ], n33 = me[ 8 ],

  			t11 = n33 * n22 - n32 * n23,
  			t12 = n32 * n13 - n33 * n12,
  			t13 = n23 * n12 - n22 * n13,

  			det = n11 * t11 + n21 * t12 + n31 * t13;

  		if ( det === 0 ) {

  			var msg = "THREE.Matrix3.getInverse(): can't invert matrix, determinant is 0";

  			if ( throwOnDegenerate || false ) {} else {

  				console.warn( msg );

  			}

  			return this.identity();
  		}

  		var detInv = 1 / det;

  		te[ 0 ] = t11 * detInv;
  		te[ 1 ] = ( n31 * n23 - n33 * n21 ) * detInv;
  		te[ 2 ] = ( n32 * n21 - n31 * n22 ) * detInv;

  		te[ 3 ] = t12 * detInv;
  		te[ 4 ] = ( n33 * n11 - n31 * n13 ) * detInv;
  		te[ 5 ] = ( n31 * n12 - n32 * n11 ) * detInv;

  		te[ 6 ] = t13 * detInv;
  		te[ 7 ] = ( n21 * n13 - n23 * n11 ) * detInv;
  		te[ 8 ] = ( n22 * n11 - n21 * n12 ) * detInv;

  		return this;

  	},

  	transpose: function () {

  		var tmp, m = this.elements;

  		tmp = m[ 1 ]; m[ 1 ] = m[ 3 ]; m[ 3 ] = tmp;
  		tmp = m[ 2 ]; m[ 2 ] = m[ 6 ]; m[ 6 ] = tmp;
  		tmp = m[ 5 ]; m[ 5 ] = m[ 7 ]; m[ 7 ] = tmp;

  		return this;

  	},

  	flattenToArrayOffset: function ( array, offset ) {

  		console.warn( "THREE.Matrix3: .flattenToArrayOffset is deprecated " +
  				"- just use .toArray instead." );

  		return this.toArray( array, offset );

  	},

  	getNormalMatrix: function ( matrix4 ) {

  		return this.setFromMatrix4( matrix4 ).getInverse( this ).transpose();

  	},

  	transposeIntoArray: function ( r ) {

  		var m = this.elements;

  		r[ 0 ] = m[ 0 ];
  		r[ 1 ] = m[ 3 ];
  		r[ 2 ] = m[ 6 ];
  		r[ 3 ] = m[ 1 ];
  		r[ 4 ] = m[ 4 ];
  		r[ 5 ] = m[ 7 ];
  		r[ 6 ] = m[ 2 ];
  		r[ 7 ] = m[ 5 ];
  		r[ 8 ] = m[ 8 ];

  		return this;

  	},

  	fromArray: function ( array ) {

  		this.elements.set( array );

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		var te = this.elements;

  		array[ offset ] = te[ 0 ];
  		array[ offset + 1 ] = te[ 1 ];
  		array[ offset + 2 ] = te[ 2 ];

  		array[ offset + 3 ] = te[ 3 ];
  		array[ offset + 4 ] = te[ 4 ];
  		array[ offset + 5 ] = te[ 5 ];

  		array[ offset + 6 ] = te[ 6 ];
  		array[ offset + 7 ] = te[ 7 ];
  		array[ offset + 8 ]  = te[ 8 ];

  		return array;

  	}

  };

  /**
   * @author bhouston / http://clara.io
   */

  function Plane( normal, constant ) {

  	this.normal = ( normal !== undefined ) ? normal : new Vector3( 1, 0, 0 );
  	this.constant = ( constant !== undefined ) ? constant : 0;

  };

  Plane.prototype = {

  	constructor: Plane,

  	set: function ( normal, constant ) {

  		this.normal.copy( normal );
  		this.constant = constant;

  		return this;

  	},

  	setComponents: function ( x, y, z, w ) {

  		this.normal.set( x, y, z );
  		this.constant = w;

  		return this;

  	},

  	setFromNormalAndCoplanarPoint: function ( normal, point ) {

  		this.normal.copy( normal );
  		this.constant = - point.dot( this.normal );	// must be this.normal, not normal, as this.normal is normalized

  		return this;

  	},

  	setFromCoplanarPoints: function () {

  		var v1 = new Vector3();
  		var v2 = new Vector3();

  		return function setFromCoplanarPoints( a, b, c ) {

  			var normal = v1.subVectors( c, b ).cross( v2.subVectors( a, b ) ).normalize();

  			// Q: should an error be thrown if normal is zero (e.g. degenerate plane)?

  			this.setFromNormalAndCoplanarPoint( normal, a );

  			return this;

  		};

  	}(),

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( plane ) {

  		this.normal.copy( plane.normal );
  		this.constant = plane.constant;

  		return this;

  	},

  	normalize: function () {

  		// Note: will lead to a divide by zero if the plane is invalid.

  		var inverseNormalLength = 1.0 / this.normal.length();
  		this.normal.multiplyScalar( inverseNormalLength );
  		this.constant *= inverseNormalLength;

  		return this;

  	},

  	negate: function () {

  		this.constant *= - 1;
  		this.normal.negate();

  		return this;

  	},

  	distanceToPoint: function ( point ) {

  		return this.normal.dot( point ) + this.constant;

  	},

  	distanceToSphere: function ( sphere ) {

  		return this.distanceToPoint( sphere.center ) - sphere.radius;

  	},

  	projectPoint: function ( point, optionalTarget ) {

  		return this.orthoPoint( point, optionalTarget ).sub( point ).negate();

  	},

  	orthoPoint: function ( point, optionalTarget ) {

  		var perpendicularMagnitude = this.distanceToPoint( point );

  		var result = optionalTarget || new Vector3();
  		return result.copy( this.normal ).multiplyScalar( perpendicularMagnitude );

  	},

  	intersectLine: function () {

  		var v1 = new Vector3();

  		return function intersectLine( line, optionalTarget ) {

  			var result = optionalTarget || new Vector3();

  			var direction = line.delta( v1 );

  			var denominator = this.normal.dot( direction );

  			if ( denominator === 0 ) {

  				// line is coplanar, return origin
  				if ( this.distanceToPoint( line.start ) === 0 ) {

  					return result.copy( line.start );

  				}

  				// Unsure if this is the correct method to handle this case.
  				return undefined;

  			}

  			var t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;

  			if ( t < 0 || t > 1 ) {

  				return undefined;

  			}

  			return result.copy( direction ).multiplyScalar( t ).add( line.start );

  		};

  	}(),

  	intersectsLine: function ( line ) {

  		// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.

  		var startSign = this.distanceToPoint( line.start );
  		var endSign = this.distanceToPoint( line.end );

  		return ( startSign < 0 && endSign > 0 ) || ( endSign < 0 && startSign > 0 );

  	},

  	intersectsBox: function ( box ) {

  		return box.intersectsPlane( this );

  	},

  	intersectsSphere: function ( sphere ) {

  		return sphere.intersectsPlane( this );

  	},

  	coplanarPoint: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.copy( this.normal ).multiplyScalar( - this.constant );

  	},

  	applyMatrix4: function () {

  		var v1 = new Vector3();
  		var m1 = new Matrix3();

  		return function applyMatrix4( matrix, optionalNormalMatrix ) {

  			var referencePoint = this.coplanarPoint( v1 ).applyMatrix4( matrix );

  			// transform normal based on theory here:
  			// http://www.songho.ca/opengl/gl_normaltransform.html
  			var normalMatrix = optionalNormalMatrix || m1.getNormalMatrix( matrix );
  			var normal = this.normal.applyMatrix3( normalMatrix ).normalize();

  			// recalculate constant (like in setFromNormalAndCoplanarPoint)
  			this.constant = - referencePoint.dot( normal );

  			return this;

  		};

  	}(),

  	translate: function ( offset ) {

  		this.constant = this.constant - offset.dot( this.normal );

  		return this;

  	},

  	equals: function ( plane ) {

  		return plane.normal.equals( this.normal ) && ( plane.constant === this.constant );

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   * @author bhouston / http://clara.io
   */

  function Frustum( p0, p1, p2, p3, p4, p5 ) {

  	this.planes = [

  		( p0 !== undefined ) ? p0 : new Plane(),
  		( p1 !== undefined ) ? p1 : new Plane(),
  		( p2 !== undefined ) ? p2 : new Plane(),
  		( p3 !== undefined ) ? p3 : new Plane(),
  		( p4 !== undefined ) ? p4 : new Plane(),
  		( p5 !== undefined ) ? p5 : new Plane()

  	];

  };

  Frustum.prototype = {

  	constructor: Frustum,

  	set: function ( p0, p1, p2, p3, p4, p5 ) {

  		var planes = this.planes;

  		planes[ 0 ].copy( p0 );
  		planes[ 1 ].copy( p1 );
  		planes[ 2 ].copy( p2 );
  		planes[ 3 ].copy( p3 );
  		planes[ 4 ].copy( p4 );
  		planes[ 5 ].copy( p5 );

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( frustum ) {

  		var planes = this.planes;

  		for ( var i = 0; i < 6; i ++ ) {

  			planes[ i ].copy( frustum.planes[ i ] );

  		}

  		return this;

  	},

  	setFromMatrix: function ( m ) {

  		var planes = this.planes;
  		var me = m.elements;
  		var me0 = me[ 0 ], me1 = me[ 1 ], me2 = me[ 2 ], me3 = me[ 3 ];
  		var me4 = me[ 4 ], me5 = me[ 5 ], me6 = me[ 6 ], me7 = me[ 7 ];
  		var me8 = me[ 8 ], me9 = me[ 9 ], me10 = me[ 10 ], me11 = me[ 11 ];
  		var me12 = me[ 12 ], me13 = me[ 13 ], me14 = me[ 14 ], me15 = me[ 15 ];

  		planes[ 0 ].setComponents( me3 - me0, me7 - me4, me11 - me8, me15 - me12 ).normalize();
  		planes[ 1 ].setComponents( me3 + me0, me7 + me4, me11 + me8, me15 + me12 ).normalize();
  		planes[ 2 ].setComponents( me3 + me1, me7 + me5, me11 + me9, me15 + me13 ).normalize();
  		planes[ 3 ].setComponents( me3 - me1, me7 - me5, me11 - me9, me15 - me13 ).normalize();
  		planes[ 4 ].setComponents( me3 - me2, me7 - me6, me11 - me10, me15 - me14 ).normalize();
  		planes[ 5 ].setComponents( me3 + me2, me7 + me6, me11 + me10, me15 + me14 ).normalize();

  		return this;

  	},

  	intersectsObject: function () {

  		var sphere = new Sphere();

  		return function intersectsObject( object ) {

  			var geometry = object.geometry;

  			if ( geometry.boundingSphere === null )
  				geometry.computeBoundingSphere();

  			sphere.copy( geometry.boundingSphere )
  				.applyMatrix4( object.matrixWorld );

  			return this.intersectsSphere( sphere );

  		};

  	}(),

  	intersectsSprite: function () {

  		var sphere = new Sphere();

  		return function intersectsSprite( sprite ) {

  			sphere.center.set( 0, 0, 0 );
  			sphere.radius = 0.7071067811865476;
  			sphere.applyMatrix4( sprite.matrixWorld );

  			return this.intersectsSphere( sphere );

  		};

  	}(),

  	intersectsSphere: function ( sphere ) {

  		var planes = this.planes;
  		var center = sphere.center;
  		var negRadius = - sphere.radius;

  		for ( var i = 0; i < 6; i ++ ) {

  			var distance = planes[ i ].distanceToPoint( center );

  			if ( distance < negRadius ) {

  				return false;

  			}

  		}

  		return true;

  	},

  	intersectsBox: function () {

  		var p1 = new Vector3(),
  			p2 = new Vector3();

  		return function intersectsBox( box ) {

  			var planes = this.planes;

  			for ( var i = 0; i < 6 ; i ++ ) {

  				var plane = planes[ i ];

  				p1.x = plane.normal.x > 0 ? box.min.x : box.max.x;
  				p2.x = plane.normal.x > 0 ? box.max.x : box.min.x;
  				p1.y = plane.normal.y > 0 ? box.min.y : box.max.y;
  				p2.y = plane.normal.y > 0 ? box.max.y : box.min.y;
  				p1.z = plane.normal.z > 0 ? box.min.z : box.max.z;
  				p2.z = plane.normal.z > 0 ? box.max.z : box.min.z;

  				var d1 = plane.distanceToPoint( p1 );
  				var d2 = plane.distanceToPoint( p2 );

  				// if both outside plane, no intersection

  				if ( d1 < 0 && d2 < 0 ) {

  					return false;

  				}

  			}

  			return true;

  		};

  	}(),


  	containsPoint: function ( point ) {

  		var planes = this.planes;

  		for ( var i = 0; i < 6; i ++ ) {

  			if ( planes[ i ].distanceToPoint( point ) < 0 ) {

  				return false;

  			}

  		}

  		return true;

  	}

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   */

  function WebGLShadowMap( _renderer, _lights, _objects, capabilities ) {

  	var _gl = _renderer.context,
  	_state = _renderer.state,
  	_frustum = new Frustum(),
  	_projScreenMatrix = new Matrix4(),

  	_lightShadows = _lights.shadows,

  	_shadowMapSize = new Vector2(),
  	_maxShadowMapSize = new Vector2( capabilities.maxTextureSize, capabilities.maxTextureSize ),

  	_lookTarget = new Vector3(),
  	_lightPositionWorld = new Vector3(),

  	_renderList = [],

  	_MorphingFlag = 1,
  	_SkinningFlag = 2,

  	_NumberOfMaterialVariants = ( _MorphingFlag | _SkinningFlag ) + 1,

  	_depthMaterials = new Array( _NumberOfMaterialVariants ),
  	_distanceMaterials = new Array( _NumberOfMaterialVariants ),

  	_materialCache = {};

  	var cubeDirections = [
  		new Vector3( 1, 0, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ),
  		new Vector3( 0, 0, - 1 ), new Vector3( 0, 1, 0 ), new Vector3( 0, - 1, 0 )
  	];

  	var cubeUps = [
  		new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ),
  		new Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ),	new Vector3( 0, 0, - 1 )
  	];

  	var cube2DViewPorts = [
  		new Vector4(), new Vector4(), new Vector4(),
  		new Vector4(), new Vector4(), new Vector4()
  	];

  	// init

  	var depthMaterialTemplate = new MeshDepthMaterial();
  	depthMaterialTemplate.depthPacking = RGBADepthPacking;
  	depthMaterialTemplate.clipping = true;

  	var distanceShader = exports.ShaderLib[ "distanceRGBA" ];
  	var distanceUniforms = exports.UniformsUtils.clone( distanceShader.uniforms );

  	for ( var i = 0; i !== _NumberOfMaterialVariants; ++ i ) {

  		var useMorphing = ( i & _MorphingFlag ) !== 0;
  		var useSkinning = ( i & _SkinningFlag ) !== 0;

  		var depthMaterial = depthMaterialTemplate.clone();
  		depthMaterial.morphTargets = useMorphing;
  		depthMaterial.skinning = useSkinning;

  		_depthMaterials[ i ] = depthMaterial;

  		var distanceMaterial = new ShaderMaterial( {
  			defines: {
  				'USE_SHADOWMAP': ''
  			},
  			uniforms: distanceUniforms,
  			vertexShader: distanceShader.vertexShader,
  			fragmentShader: distanceShader.fragmentShader,
  			morphTargets: useMorphing,
  			skinning: useSkinning,
  			clipping: true
  		} );

  		_distanceMaterials[ i ] = distanceMaterial;

  	}

  	//

  	var scope = this;

  	this.enabled = false;

  	this.autoUpdate = true;
  	this.needsUpdate = false;

  	this.type = PCFShadowMap;

  	this.renderReverseSided = true;
  	this.renderSingleSided = true;

  	this.render = function ( scene, camera ) {

  		if ( scope.enabled === false ) return;
  		if ( scope.autoUpdate === false && scope.needsUpdate === false ) return;

  		if ( _lightShadows.length === 0 ) return;

  		// Set GL state for depth map.
  		_state.clearColor( 1, 1, 1, 1 );
  		_state.disable( _gl.BLEND );
  		_state.setDepthTest( true );
  		_state.setScissorTest( false );

  		// render depth map

  		var faceCount, isPointLight;

  		for ( var i = 0, il = _lightShadows.length; i < il; i ++ ) {

  			var light = _lightShadows[ i ];
  			var shadow = light.shadow;

  			if ( shadow === undefined ) {

  				console.warn( 'THREE.WebGLShadowMap:', light, 'has no shadow.' );
  				continue;

  			}

  			var shadowCamera = shadow.camera;

  			_shadowMapSize.copy( shadow.mapSize );
  			_shadowMapSize.min( _maxShadowMapSize );

  			if ( (light && light.isPointLight) ) {

  				faceCount = 6;
  				isPointLight = true;

  				var vpWidth = _shadowMapSize.x;
  				var vpHeight = _shadowMapSize.y;

  				// These viewports map a cube-map onto a 2D texture with the
  				// following orientation:
  				//
  				//  xzXZ
  				//   y Y
  				//
  				// X - Positive x direction
  				// x - Negative x direction
  				// Y - Positive y direction
  				// y - Negative y direction
  				// Z - Positive z direction
  				// z - Negative z direction

  				// positive X
  				cube2DViewPorts[ 0 ].set( vpWidth * 2, vpHeight, vpWidth, vpHeight );
  				// negative X
  				cube2DViewPorts[ 1 ].set( 0, vpHeight, vpWidth, vpHeight );
  				// positive Z
  				cube2DViewPorts[ 2 ].set( vpWidth * 3, vpHeight, vpWidth, vpHeight );
  				// negative Z
  				cube2DViewPorts[ 3 ].set( vpWidth, vpHeight, vpWidth, vpHeight );
  				// positive Y
  				cube2DViewPorts[ 4 ].set( vpWidth * 3, 0, vpWidth, vpHeight );
  				// negative Y
  				cube2DViewPorts[ 5 ].set( vpWidth, 0, vpWidth, vpHeight );

  				_shadowMapSize.x *= 4.0;
  				_shadowMapSize.y *= 2.0;

  			} else {

  				faceCount = 1;
  				isPointLight = false;

  			}

  			if ( shadow.map === null ) {

  				var pars = { minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat };

  				shadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );

  				shadowCamera.updateProjectionMatrix();

  			}

  			if ( (shadow && shadow.isSpotLightShadow) ) {

  				shadow.update( light );

  			}

  			var shadowMap = shadow.map;
  			var shadowMatrix = shadow.matrix;

  			_lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
  			shadowCamera.position.copy( _lightPositionWorld );

  			_renderer.setRenderTarget( shadowMap );
  			_renderer.clear();

  			// render shadow map for each cube face (if omni-directional) or
  			// run a single pass if not

  			for ( var face = 0; face < faceCount; face ++ ) {

  				if ( isPointLight ) {

  					_lookTarget.copy( shadowCamera.position );
  					_lookTarget.add( cubeDirections[ face ] );
  					shadowCamera.up.copy( cubeUps[ face ] );
  					shadowCamera.lookAt( _lookTarget );

  					var vpDimensions = cube2DViewPorts[ face ];
  					_state.viewport( vpDimensions );

  				} else {

  					_lookTarget.setFromMatrixPosition( light.target.matrixWorld );
  					shadowCamera.lookAt( _lookTarget );

  				}

  				shadowCamera.updateMatrixWorld();
  				shadowCamera.matrixWorldInverse.getInverse( shadowCamera.matrixWorld );

  				// compute shadow matrix

  				shadowMatrix.set(
  					0.5, 0.0, 0.0, 0.5,
  					0.0, 0.5, 0.0, 0.5,
  					0.0, 0.0, 0.5, 0.5,
  					0.0, 0.0, 0.0, 1.0
  				);

  				shadowMatrix.multiply( shadowCamera.projectionMatrix );
  				shadowMatrix.multiply( shadowCamera.matrixWorldInverse );

  				// update camera matrices and frustum

  				_projScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );
  				_frustum.setFromMatrix( _projScreenMatrix );

  				// set object matrices & frustum culling

  				_renderList.length = 0;

  				projectObject( scene, camera, shadowCamera );

  				// render shadow map
  				// render regular objects

  				for ( var j = 0, jl = _renderList.length; j < jl; j ++ ) {

  					var object = _renderList[ j ];
  					var geometry = _objects.update( object );
  					var material = object.material;

  					if ( (material && material.isMultiMaterial) ) {

  						var groups = geometry.groups;
  						var materials = material.materials;

  						for ( var k = 0, kl = groups.length; k < kl; k ++ ) {

  							var group = groups[ k ];
  							var groupMaterial = materials[ group.materialIndex ];

  							if ( groupMaterial.visible === true ) {

  								var depthMaterial = getDepthMaterial( object, groupMaterial, isPointLight, _lightPositionWorld );
  								_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, group );

  							}

  						}

  					} else {

  						var depthMaterial = getDepthMaterial( object, material, isPointLight, _lightPositionWorld );
  						_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, null );

  					}

  				}

  			}

  		}

  		// Restore GL state.
  		var clearColor = _renderer.getClearColor(),
  		clearAlpha = _renderer.getClearAlpha();
  		_renderer.setClearColor( clearColor, clearAlpha );

  		scope.needsUpdate = false;

  	};

  	function getDepthMaterial( object, material, isPointLight, lightPositionWorld ) {

  		var geometry = object.geometry;

  		var result = null;

  		var materialVariants = _depthMaterials;
  		var customMaterial = object.customDepthMaterial;

  		if ( isPointLight ) {

  			materialVariants = _distanceMaterials;
  			customMaterial = object.customDistanceMaterial;

  		}

  		if ( ! customMaterial ) {

  			var useMorphing = false;

  			if ( material.morphTargets ) {

  				if ( (geometry && geometry.isBufferGeometry) ) {

  					useMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;

  				} else if ( (geometry && geometry.isGeometry) ) {

  					useMorphing = geometry.morphTargets && geometry.morphTargets.length > 0;

  				}

  			}

  			var useSkinning = (object && object.isSkinnedMesh) && material.skinning;

  			var variantIndex = 0;

  			if ( useMorphing ) variantIndex |= _MorphingFlag;
  			if ( useSkinning ) variantIndex |= _SkinningFlag;

  			result = materialVariants[ variantIndex ];

  		} else {

  			result = customMaterial;

  		}

  		if ( _renderer.localClippingEnabled &&
  			 material.clipShadows === true &&
  				material.clippingPlanes.length !== 0 ) {

  			// in this case we need a unique material instance reflecting the
  			// appropriate state

  			var keyA = result.uuid, keyB = material.uuid;

  			var materialsForVariant = _materialCache[ keyA ];

  			if ( materialsForVariant === undefined ) {

  				materialsForVariant = {};
  				_materialCache[ keyA ] = materialsForVariant;

  			}

  			var cachedMaterial = materialsForVariant[ keyB ];

  			if ( cachedMaterial === undefined ) {

  				cachedMaterial = result.clone();
  				materialsForVariant[ keyB ] = cachedMaterial;

  			}

  			result = cachedMaterial;

  		}

  		result.visible = material.visible;
  		result.wireframe = material.wireframe;

  		var side = material.side;

  		if ( scope.renderSingleSided && side == DoubleSide ) {

  			side = FrontSide;

  		}

  		if ( scope.renderReverseSided ) {

  			if ( side === FrontSide ) side = BackSide;
  			else if ( side === BackSide ) side = FrontSide;

  		}

  		result.side = side;

  		result.clipShadows = material.clipShadows;
  		result.clippingPlanes = material.clippingPlanes;

  		result.wireframeLinewidth = material.wireframeLinewidth;
  		result.linewidth = material.linewidth;

  		if ( isPointLight && result.uniforms.lightPos !== undefined ) {

  			result.uniforms.lightPos.value.copy( lightPositionWorld );

  		}

  		return result;

  	}

  	function projectObject( object, camera, shadowCamera ) {

  		if ( object.visible === false ) return;

  		if ( object.layers.test( camera.layers ) && ( (object && object.isMesh) || (object && object.isLine) || (object && object.isPoints) ) ) {

  			if ( object.castShadow && ( object.frustumCulled === false || _frustum.intersectsObject( object ) === true ) ) {

  				var material = object.material;

  				if ( material.visible === true ) {

  					object.modelViewMatrix.multiplyMatrices( shadowCamera.matrixWorldInverse, object.matrixWorld );
  					_renderList.push( object );

  				}

  			}

  		}

  		var children = object.children;

  		for ( var i = 0, l = children.length; i < l; i ++ ) {

  			projectObject( children[ i ], camera, shadowCamera );

  		}

  	}

  };

  exports.WebGLShader = ( function () {

  	function addLineNumbers( string ) {

  		var lines = string.split( '\n' );

  		for ( var i = 0; i < lines.length; i ++ ) {

  			lines[ i ] = ( i + 1 ) + ': ' + lines[ i ];

  		}

  		return lines.join( '\n' );

  	}

  	return function WebGLShader( gl, type, string ) {

  		var shader = gl.createShader( type );

  		gl.shaderSource( shader, string );
  		gl.compileShader( shader );

  		if ( gl.getShaderParameter( shader, gl.COMPILE_STATUS ) === false ) {

  			console.error( 'THREE.WebGLShader: Shader couldn\'t compile.' );

  		}

  		if ( gl.getShaderInfoLog( shader ) !== '' ) {

  			console.warn( 'THREE.WebGLShader: gl.getShaderInfoLog()', type === gl.VERTEX_SHADER ? 'vertex' : 'fragment', gl.getShaderInfoLog( shader ), addLineNumbers( string ) );

  		}

  		// --enable-privileged-webgl-extension
  		// console.log( type, gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );

  		return shader;

  	};

  } )();

  /**
  * @author fordacious / fordacious.github.io
  */

  function WebGLProperties() {

  	var properties = {};

  	this.get = function ( object ) {

  		var uuid = object.uuid;
  		var map = properties[ uuid ];

  		if ( map === undefined ) {

  			map = {};
  			properties[ uuid ] = map;

  		}

  		return map;

  	};

  	this.delete = function ( object ) {

  		delete properties[ object.uuid ];

  	};

  	this.clear = function () {

  		properties = {};

  	};

  };

  exports.WebGLProgram = ( function () {

  	var programIdCount = 0;

  	function getEncodingComponents( encoding ) {

  		switch ( encoding ) {

  			case LinearEncoding:
  				return [ 'Linear','( value )' ];
  			case sRGBEncoding:
  				return [ 'sRGB','( value )' ];
  			case RGBEEncoding:
  				return [ 'RGBE','( value )' ];
  			case RGBM7Encoding:
  				return [ 'RGBM','( value, 7.0 )' ];
  			case RGBM16Encoding:
  				return [ 'RGBM','( value, 16.0 )' ];
  			case RGBDEncoding:
  				return [ 'RGBD','( value, 256.0 )' ];
  			case GammaEncoding:
  				return [ 'Gamma','( value, float( GAMMA_FACTOR ) )' ];
  			default:
  				throw new Error( 'unsupported encoding: ' + encoding );

  		}

  	}

  	function getTexelDecodingFunction( functionName, encoding ) {

  		var components = getEncodingComponents( encoding );
  		return "vec4 " + functionName + "( vec4 value ) { return " + components[ 0 ] + "ToLinear" + components[ 1 ] + "; }";

  	}

  	function getTexelEncodingFunction( functionName, encoding ) {

  		var components = getEncodingComponents( encoding );
  		return "vec4 " + functionName + "( vec4 value ) { return LinearTo" + components[ 0 ] + components[ 1 ] + "; }";

  	}

  	function getToneMappingFunction( functionName, toneMapping ) {

  		var toneMappingName;

  		switch ( toneMapping ) {

  			case LinearToneMapping:
  				toneMappingName = "Linear";
  				break;

  			case ReinhardToneMapping:
  				toneMappingName = "Reinhard";
  				break;

  			case Uncharted2ToneMapping:
  				toneMappingName = "Uncharted2";
  				break;

  			case CineonToneMapping:
  				toneMappingName = "OptimizedCineon";
  				break;

  			default:
  				throw new Error( 'unsupported toneMapping: ' + toneMapping );

  		}

  		return "vec3 " + functionName + "( vec3 color ) { return " + toneMappingName + "ToneMapping( color ); }";

  	}

  	function generateExtensions( extensions, parameters, rendererExtensions ) {

  		extensions = extensions || {};

  		var chunks = [
  			( extensions.derivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.normalMap || parameters.flatShading ) ? '#extension GL_OES_standard_derivatives : enable' : '',
  			( extensions.fragDepth || parameters.logarithmicDepthBuffer ) && rendererExtensions.get( 'EXT_frag_depth' ) ? '#extension GL_EXT_frag_depth : enable' : '',
  			( extensions.drawBuffers ) && rendererExtensions.get( 'WEBGL_draw_buffers' ) ? '#extension GL_EXT_draw_buffers : require' : '',
  			( extensions.shaderTextureLOD || parameters.envMap ) && rendererExtensions.get( 'EXT_shader_texture_lod' ) ? '#extension GL_EXT_shader_texture_lod : enable' : '',
  		];

  		return chunks.filter( filterEmptyLine ).join( '\n' );

  	}

  	function generateDefines( defines ) {

  		var chunks = [];

  		for ( var name in defines ) {

  			var value = defines[ name ];

  			if ( value === false ) continue;

  			chunks.push( '#define ' + name + ' ' + value );

  		}

  		return chunks.join( '\n' );

  	}

  	function fetchAttributeLocations( gl, program, identifiers ) {

  		var attributes = {};

  		var n = gl.getProgramParameter( program, gl.ACTIVE_ATTRIBUTES );

  		for ( var i = 0; i < n; i ++ ) {

  			var info = gl.getActiveAttrib( program, i );
  			var name = info.name;

  			// console.log("THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:", name, i );

  			attributes[ name ] = gl.getAttribLocation( program, name );

  		}

  		return attributes;

  	}

  	function filterEmptyLine( string ) {

  		return string !== '';

  	}

  	function replaceLightNums( string, parameters ) {

  		return string
  			.replace( /NUM_DIR_LIGHTS/g, parameters.numDirLights )
  			.replace( /NUM_SPOT_LIGHTS/g, parameters.numSpotLights )
  			.replace( /NUM_POINT_LIGHTS/g, parameters.numPointLights )
  			.replace( /NUM_HEMI_LIGHTS/g, parameters.numHemiLights );

  	}

  	function parseIncludes( string ) {

  		var pattern = /#include +<([\w\d.]+)>/g;

  		function replace( match, include ) {

  			var replace = ShaderChunk[ include ];

  			if ( replace === undefined ) {

  				throw new Error( 'Can not resolve #include <' + include + '>' );

  			}

  			return parseIncludes( replace );

  		}

  		return string.replace( pattern, replace );

  	}

  	function unrollLoops( string ) {

  		var pattern = /for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;

  		function replace( match, start, end, snippet ) {

  			var unroll = '';

  			for ( var i = parseInt( start ); i < parseInt( end ); i ++ ) {

  				unroll += snippet.replace( /\[ i \]/g, '[ ' + i + ' ]' );

  			}

  			return unroll;

  		}

  		return string.replace( pattern, replace );

  	}

  	return function WebGLProgram( renderer, code, material, parameters ) {

  		var gl = renderer.context;

  		var extensions = material.extensions;
  		var defines = material.defines;

  		var vertexShader = material.__webglShader.vertexShader;
  		var fragmentShader = material.__webglShader.fragmentShader;

  		var shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';

  		if ( parameters.shadowMapType === PCFShadowMap ) {

  			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';

  		} else if ( parameters.shadowMapType === PCFSoftShadowMap ) {

  			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';

  		}

  		var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
  		var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';
  		var envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';

  		if ( parameters.envMap ) {

  			switch ( material.envMap.mapping ) {

  				case CubeReflectionMapping:
  				case CubeRefractionMapping:
  					envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
  					break;

  				case CubeUVReflectionMapping:
  				case CubeUVRefractionMapping:
  					envMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';
  					break;

  				case EquirectangularReflectionMapping:
  				case EquirectangularRefractionMapping:
  					envMapTypeDefine = 'ENVMAP_TYPE_EQUIREC';
  					break;

  				case SphericalReflectionMapping:
  					envMapTypeDefine = 'ENVMAP_TYPE_SPHERE';
  					break;

  			}

  			switch ( material.envMap.mapping ) {

  				case CubeRefractionMapping:
  				case EquirectangularRefractionMapping:
  					envMapModeDefine = 'ENVMAP_MODE_REFRACTION';
  					break;

  			}

  			switch ( material.combine ) {

  				case MultiplyOperation:
  					envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
  					break;

  				case MixOperation:
  					envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';
  					break;

  				case AddOperation:
  					envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';
  					break;

  			}

  		}

  		var gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;

  		// console.log( 'building new program ' );

  		//

  		var customExtensions = generateExtensions( extensions, parameters, renderer.extensions );

  		var customDefines = generateDefines( defines );

  		//

  		var program = gl.createProgram();

  		var prefixVertex, prefixFragment;

  		if ( (material && material.isRawShaderMaterial) ) {

  			prefixVertex = [

  				customDefines

  			].filter( filterEmptyLine ).join( '\n' );

  			prefixFragment = [

  				customDefines

  			].filter( filterEmptyLine ).join( '\n' );

  		} else {

  			prefixVertex = [

  				'precision ' + parameters.precision + ' float;',
  				'precision ' + parameters.precision + ' int;',

  				'#define SHADER_NAME ' + material.__webglShader.name,

  				customDefines,

  				parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',

  				'#define GAMMA_FACTOR ' + gammaFactorDefine,

  				'#define MAX_BONES ' + parameters.maxBones,

  				parameters.map ? '#define USE_MAP' : '',
  				parameters.envMap ? '#define USE_ENVMAP' : '',
  				parameters.envMap ? '#define ' + envMapModeDefine : '',
  				parameters.lightMap ? '#define USE_LIGHTMAP' : '',
  				parameters.aoMap ? '#define USE_AOMAP' : '',
  				parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
  				parameters.bumpMap ? '#define USE_BUMPMAP' : '',
  				parameters.normalMap ? '#define USE_NORMALMAP' : '',
  				parameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '',
  				parameters.specularMap ? '#define USE_SPECULARMAP' : '',
  				parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
  				parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
  				parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
  				parameters.vertexColors ? '#define USE_COLOR' : '',

  				parameters.flatShading ? '#define FLAT_SHADED' : '',

  				parameters.skinning ? '#define USE_SKINNING' : '',
  				parameters.useVertexTexture ? '#define BONE_TEXTURE' : '',

  				parameters.morphTargets ? '#define USE_MORPHTARGETS' : '',
  				parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',
  				parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
  				parameters.flipSided ? '#define FLIP_SIDED' : '',

  				'#define NUM_CLIPPING_PLANES ' + parameters.numClippingPlanes,

  				parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
  				parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',

  				parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',

  				parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
  				parameters.logarithmicDepthBuffer && renderer.extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',

  				'uniform mat4 modelMatrix;',
  				'uniform mat4 modelViewMatrix;',
  				'uniform mat4 projectionMatrix;',
  				'uniform mat4 viewMatrix;',
  				'uniform mat3 normalMatrix;',
  				'uniform vec3 cameraPosition;',

  				'attribute vec3 position;',
  				'attribute vec3 normal;',
  				'attribute vec2 uv;',

  				'#ifdef USE_COLOR',

  				'	attribute vec3 color;',

  				'#endif',

  				'#ifdef USE_MORPHTARGETS',

  				'	attribute vec3 morphTarget0;',
  				'	attribute vec3 morphTarget1;',
  				'	attribute vec3 morphTarget2;',
  				'	attribute vec3 morphTarget3;',

  				'	#ifdef USE_MORPHNORMALS',

  				'		attribute vec3 morphNormal0;',
  				'		attribute vec3 morphNormal1;',
  				'		attribute vec3 morphNormal2;',
  				'		attribute vec3 morphNormal3;',

  				'	#else',

  				'		attribute vec3 morphTarget4;',
  				'		attribute vec3 morphTarget5;',
  				'		attribute vec3 morphTarget6;',
  				'		attribute vec3 morphTarget7;',

  				'	#endif',

  				'#endif',

  				'#ifdef USE_SKINNING',

  				'	attribute vec4 skinIndex;',
  				'	attribute vec4 skinWeight;',

  				'#endif',

  				'\n'

  			].filter( filterEmptyLine ).join( '\n' );

  			prefixFragment = [

  				customExtensions,

  				'precision ' + parameters.precision + ' float;',
  				'precision ' + parameters.precision + ' int;',

  				'#define SHADER_NAME ' + material.__webglShader.name,

  				customDefines,

  				parameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest : '',

  				'#define GAMMA_FACTOR ' + gammaFactorDefine,

  				( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
  				( parameters.useFog && parameters.fogExp ) ? '#define FOG_EXP2' : '',

  				parameters.map ? '#define USE_MAP' : '',
  				parameters.envMap ? '#define USE_ENVMAP' : '',
  				parameters.envMap ? '#define ' + envMapTypeDefine : '',
  				parameters.envMap ? '#define ' + envMapModeDefine : '',
  				parameters.envMap ? '#define ' + envMapBlendingDefine : '',
  				parameters.lightMap ? '#define USE_LIGHTMAP' : '',
  				parameters.aoMap ? '#define USE_AOMAP' : '',
  				parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
  				parameters.bumpMap ? '#define USE_BUMPMAP' : '',
  				parameters.normalMap ? '#define USE_NORMALMAP' : '',
  				parameters.specularMap ? '#define USE_SPECULARMAP' : '',
  				parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
  				parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
  				parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
  				parameters.vertexColors ? '#define USE_COLOR' : '',

  				parameters.flatShading ? '#define FLAT_SHADED' : '',

  				parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
  				parameters.flipSided ? '#define FLIP_SIDED' : '',

  				'#define NUM_CLIPPING_PLANES ' + parameters.numClippingPlanes,

  				parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
  				parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',

  				parameters.premultipliedAlpha ? "#define PREMULTIPLIED_ALPHA" : '',

  				parameters.physicallyCorrectLights ? "#define PHYSICALLY_CORRECT_LIGHTS" : '',

  				parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
  				parameters.logarithmicDepthBuffer && renderer.extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',

  				parameters.envMap && renderer.extensions.get( 'EXT_shader_texture_lod' ) ? '#define TEXTURE_LOD_EXT' : '',

  				'uniform mat4 viewMatrix;',
  				'uniform vec3 cameraPosition;',

  				( parameters.toneMapping !== NoToneMapping ) ? "#define TONE_MAPPING" : '',
  				( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '',  // this code is required here because it is used by the toneMapping() function defined below
  				( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( "toneMapping", parameters.toneMapping ) : '',

  				( parameters.outputEncoding || parameters.mapEncoding || parameters.envMapEncoding || parameters.emissiveMapEncoding ) ? ShaderChunk[ 'encodings_pars_fragment' ] : '', // this code is required here because it is used by the various encoding/decoding function defined below
  				parameters.mapEncoding ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',
  				parameters.envMapEncoding ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',
  				parameters.emissiveMapEncoding ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',
  				parameters.outputEncoding ? getTexelEncodingFunction( "linearToOutputTexel", parameters.outputEncoding ) : '',

  				parameters.depthPacking ? "#define DEPTH_PACKING " + material.depthPacking : '',

  				'\n'

  			].filter( filterEmptyLine ).join( '\n' );

  		}

  		vertexShader = parseIncludes( vertexShader, parameters );
  		vertexShader = replaceLightNums( vertexShader, parameters );

  		fragmentShader = parseIncludes( fragmentShader, parameters );
  		fragmentShader = replaceLightNums( fragmentShader, parameters );

  		if ( (material && material.isShaderMaterial) === false ) {

  			vertexShader = unrollLoops( vertexShader );
  			fragmentShader = unrollLoops( fragmentShader );

  		}

  		var vertexGlsl = prefixVertex + vertexShader;
  		var fragmentGlsl = prefixFragment + fragmentShader;

  		// console.log( '*VERTEX*', vertexGlsl );
  		// console.log( '*FRAGMENT*', fragmentGlsl );

  		var glVertexShader = exports.WebGLShader( gl, gl.VERTEX_SHADER, vertexGlsl );
  		var glFragmentShader = exports.WebGLShader( gl, gl.FRAGMENT_SHADER, fragmentGlsl );

  		gl.attachShader( program, glVertexShader );
  		gl.attachShader( program, glFragmentShader );

  		// Force a particular attribute to index 0.

  		if ( material.index0AttributeName !== undefined ) {

  			gl.bindAttribLocation( program, 0, material.index0AttributeName );

  		} else if ( parameters.morphTargets === true ) {

  			// programs with morphTargets displace position out of attribute 0
  			gl.bindAttribLocation( program, 0, 'position' );

  		}

  		gl.linkProgram( program );

  		var programLog = gl.getProgramInfoLog( program );
  		var vertexLog = gl.getShaderInfoLog( glVertexShader );
  		var fragmentLog = gl.getShaderInfoLog( glFragmentShader );

  		var runnable = true;
  		var haveDiagnostics = true;

  		// console.log( '**VERTEX**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glVertexShader ) );
  		// console.log( '**FRAGMENT**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glFragmentShader ) );

  		if ( gl.getProgramParameter( program, gl.LINK_STATUS ) === false ) {

  			runnable = false;

  			console.error( 'THREE.WebGLProgram: shader error: ', gl.getError(), 'gl.VALIDATE_STATUS', gl.getProgramParameter( program, gl.VALIDATE_STATUS ), 'gl.getProgramInfoLog', programLog, vertexLog, fragmentLog );

  		} else if ( programLog !== '' ) {

  			console.warn( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLog );

  		} else if ( vertexLog === '' || fragmentLog === '' ) {

  			haveDiagnostics = false;

  		}

  		if ( haveDiagnostics ) {

  			this.diagnostics = {

  				runnable: runnable,
  				material: material,

  				programLog: programLog,

  				vertexShader: {

  					log: vertexLog,
  					prefix: prefixVertex

  				},

  				fragmentShader: {

  					log: fragmentLog,
  					prefix: prefixFragment

  				}

  			};

  		}

  		// clean up

  		gl.deleteShader( glVertexShader );
  		gl.deleteShader( glFragmentShader );

  		// set up caching for uniform locations

  		var cachedUniforms;

  		this.getUniforms = function() {

  			if ( cachedUniforms === undefined ) {

  				cachedUniforms =
  						new exports.WebGLUniforms( gl, program, renderer );

  			}

  			return cachedUniforms;

  		};

  		// set up caching for attribute locations

  		var cachedAttributes;

  		this.getAttributes = function() {

  			if ( cachedAttributes === undefined ) {

  				cachedAttributes = fetchAttributeLocations( gl, program );

  			}

  			return cachedAttributes;

  		};

  		// free resource

  		this.destroy = function() {

  			gl.deleteProgram( program );
  			this.program = undefined;

  		};

  		// DEPRECATED

  		Object.defineProperties( this, {

  			uniforms: {
  				get: function() {

  					console.warn( 'THREE.WebGLProgram: .uniforms is now .getUniforms().' );
  					return this.getUniforms();

  				}
  			},

  			attributes: {
  				get: function() {

  					console.warn( 'THREE.WebGLProgram: .attributes is now .getAttributes().' );
  					return this.getAttributes();

  				}
  			}

  		} );


  		//

  		this.id = programIdCount ++;
  		this.code = code;
  		this.usedTimes = 1;
  		this.program = program;
  		this.vertexShader = glVertexShader;
  		this.fragmentShader = glFragmentShader;

  		return this;

  	};

  } )();

  function WebGLPrograms( renderer, capabilities ) {

  	var programs = [];

  	var shaderIDs = {
  		MeshDepthMaterial: 'depth',
  		MeshNormalMaterial: 'normal',
  		MeshBasicMaterial: 'basic',
  		MeshLambertMaterial: 'lambert',
  		MeshPhongMaterial: 'phong',
  		MeshStandardMaterial: 'physical',
  		MeshPhysicalMaterial: 'physical',
  		LineBasicMaterial: 'basic',
  		LineDashedMaterial: 'dashed',
  		PointsMaterial: 'points'
  	};

  	var parameterNames = [
  		"precision", "supportsVertexTextures", "map", "mapEncoding", "envMap", "envMapMode", "envMapEncoding",
  		"lightMap", "aoMap", "emissiveMap", "emissiveMapEncoding", "bumpMap", "normalMap", "displacementMap", "specularMap",
  		"roughnessMap", "metalnessMap",
  		"alphaMap", "combine", "vertexColors", "fog", "useFog", "fogExp",
  		"flatShading", "sizeAttenuation", "logarithmicDepthBuffer", "skinning",
  		"maxBones", "useVertexTexture", "morphTargets", "morphNormals",
  		"maxMorphTargets", "maxMorphNormals", "premultipliedAlpha",
  		"numDirLights", "numPointLights", "numSpotLights", "numHemiLights",
  		"shadowMapEnabled", "shadowMapType", "toneMapping", 'physicallyCorrectLights',
  		"alphaTest", "doubleSided", "flipSided", "numClippingPlanes", "depthPacking"
  	];


  	function allocateBones( object ) {

  		if ( capabilities.floatVertexTextures && object && object.skeleton && object.skeleton.useVertexTexture ) {

  			return 1024;

  		} else {

  			// default for when object is not specified
  			// ( for example when prebuilding shader to be used with multiple objects )
  			//
  			//  - leave some extra space for other uniforms
  			//  - limit here is ANGLE's 254 max uniform vectors
  			//    (up to 54 should be safe)

  			var nVertexUniforms = capabilities.maxVertexUniforms;
  			var nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );

  			var maxBones = nVertexMatrices;

  			if ( object !== undefined && (object && object.isSkinnedMesh) ) {

  				maxBones = Math.min( object.skeleton.bones.length, maxBones );

  				if ( maxBones < object.skeleton.bones.length ) {

  					console.warn( 'WebGLRenderer: too many bones - ' + object.skeleton.bones.length + ', this GPU supports just ' + maxBones + ' (try OpenGL instead of ANGLE)' );

  				}

  			}

  			return maxBones;

  		}

  	}

  	function getTextureEncodingFromMap( map, gammaOverrideLinear ) {

  		var encoding;

  		if ( ! map ) {

  			encoding = LinearEncoding;

  		} else if ( (map && map.isTexture) ) {

  			encoding = map.encoding;

  		} else if ( (map && map.isWebGLRenderTarget) ) {

  			console.warn( "THREE.WebGLPrograms.getTextureEncodingFromMap: don't use render targets as textures. Use their .texture property instead." );
  			encoding = map.texture.encoding;

  		}

  		// add backwards compatibility for WebGLRenderer.gammaInput/gammaOutput parameter, should probably be removed at some point.
  		if ( encoding === LinearEncoding && gammaOverrideLinear ) {

  			encoding = GammaEncoding;

  		}

  		return encoding;

  	}

  	this.getParameters = function ( material, lights, fog, nClipPlanes, object ) {

  		var shaderID = shaderIDs[ material.type ];

  		// heuristics to create shader parameters according to lights in the scene
  		// (not to blow over maxLights budget)

  		var maxBones = allocateBones( object );
  		var precision = renderer.getPrecision();

  		if ( material.precision !== null ) {

  			precision = capabilities.getMaxPrecision( material.precision );

  			if ( precision !== material.precision ) {

  				console.warn( 'THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.' );

  			}

  		}

  		var currentRenderTarget = renderer.getCurrentRenderTarget();

  		var parameters = {

  			shaderID: shaderID,

  			precision: precision,
  			supportsVertexTextures: capabilities.vertexTextures,
  			outputEncoding: getTextureEncodingFromMap( ( ! currentRenderTarget ) ? null : currentRenderTarget.texture, renderer.gammaOutput ),
  			map: !! material.map,
  			mapEncoding: getTextureEncodingFromMap( material.map, renderer.gammaInput ),
  			envMap: !! material.envMap,
  			envMapMode: material.envMap && material.envMap.mapping,
  			envMapEncoding: getTextureEncodingFromMap( material.envMap, renderer.gammaInput ),
  			envMapCubeUV: ( !! material.envMap ) && ( ( material.envMap.mapping === CubeUVReflectionMapping ) || ( material.envMap.mapping === CubeUVRefractionMapping ) ),
  			lightMap: !! material.lightMap,
  			aoMap: !! material.aoMap,
  			emissiveMap: !! material.emissiveMap,
  			emissiveMapEncoding: getTextureEncodingFromMap( material.emissiveMap, renderer.gammaInput ),
  			bumpMap: !! material.bumpMap,
  			normalMap: !! material.normalMap,
  			displacementMap: !! material.displacementMap,
  			roughnessMap: !! material.roughnessMap,
  			metalnessMap: !! material.metalnessMap,
  			specularMap: !! material.specularMap,
  			alphaMap: !! material.alphaMap,

  			combine: material.combine,

  			vertexColors: material.vertexColors,

  			fog: !! fog,
  			useFog: material.fog,
  			fogExp: (fog && fog.isFogExp2),

  			flatShading: material.shading === FlatShading,

  			sizeAttenuation: material.sizeAttenuation,
  			logarithmicDepthBuffer: capabilities.logarithmicDepthBuffer,

  			skinning: material.skinning,
  			maxBones: maxBones,
  			useVertexTexture: capabilities.floatVertexTextures && object && object.skeleton && object.skeleton.useVertexTexture,

  			morphTargets: material.morphTargets,
  			morphNormals: material.morphNormals,
  			maxMorphTargets: renderer.maxMorphTargets,
  			maxMorphNormals: renderer.maxMorphNormals,

  			numDirLights: lights.directional.length,
  			numPointLights: lights.point.length,
  			numSpotLights: lights.spot.length,
  			numHemiLights: lights.hemi.length,

  			numClippingPlanes: nClipPlanes,

  			shadowMapEnabled: renderer.shadowMap.enabled && object.receiveShadow && lights.shadows.length > 0,
  			shadowMapType: renderer.shadowMap.type,

  			toneMapping: renderer.toneMapping,
  			physicallyCorrectLights: renderer.physicallyCorrectLights,

  			premultipliedAlpha: material.premultipliedAlpha,

  			alphaTest: material.alphaTest,
  			doubleSided: material.side === DoubleSide,
  			flipSided: material.side === BackSide,

  			depthPacking: ( material.depthPacking !== undefined ) ? material.depthPacking : false

  		};

  		return parameters;

  	};

  	this.getProgramCode = function ( material, parameters ) {

  		var array = [];

  		if ( parameters.shaderID ) {

  			array.push( parameters.shaderID );

  		} else {

  			array.push( material.fragmentShader );
  			array.push( material.vertexShader );

  		}

  		if ( material.defines !== undefined ) {

  			for ( var name in material.defines ) {

  				array.push( name );
  				array.push( material.defines[ name ] );

  			}

  		}

  		for ( var i = 0; i < parameterNames.length; i ++ ) {

  			array.push( parameters[ parameterNames[ i ] ] );

  		}

  		return array.join();

  	};

  	this.acquireProgram = function ( material, parameters, code ) {

  		var program;

  		// Check if code has been already compiled
  		for ( var p = 0, pl = programs.length; p < pl; p ++ ) {

  			var programInfo = programs[ p ];

  			if ( programInfo.code === code ) {

  				program = programInfo;
  				++ program.usedTimes;

  				break;

  			}

  		}

  		if ( program === undefined ) {

  			program = new exports.WebGLProgram( renderer, code, material, parameters );
  			programs.push( program );

  		}

  		return program;

  	};

  	this.releaseProgram = function( program ) {

  		if ( -- program.usedTimes === 0 ) {

  			// Remove from unordered set
  			var i = programs.indexOf( program );
  			programs[ i ] = programs[ programs.length - 1 ];
  			programs.pop();

  			// Free WebGL resources
  			program.destroy();

  		}

  	};

  	// Exposed for resource monitoring & error feedback via renderer.info:
  	this.programs = programs;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function BufferAttribute( array, itemSize, normalized ) {

  	this.uuid = exports.Math.generateUUID();

  	this.array = array;
  	this.itemSize = itemSize;

  	this.dynamic = false;
  	this.updateRange = { offset: 0, count: - 1 };

  	this.version = 0;
  	this.normalized = normalized === true;

  }

  BufferAttribute.prototype = {

  	constructor: BufferAttribute,

  	isBufferAttribute: true,

  	get count() {

  		return this.array.length / this.itemSize;

  	},

  	set needsUpdate( value ) {

  		if ( value === true ) this.version ++;

  	},

  	setDynamic: function ( value ) {

  		this.dynamic = value;

  		return this;

  	},

  	copy: function ( source ) {

  		this.array = new source.array.constructor( source.array );
  		this.itemSize = source.itemSize;

  		this.dynamic = source.dynamic;

  		return this;

  	},

  	copyAt: function ( index1, attribute, index2 ) {

  		index1 *= this.itemSize;
  		index2 *= attribute.itemSize;

  		for ( var i = 0, l = this.itemSize; i < l; i ++ ) {

  			this.array[ index1 + i ] = attribute.array[ index2 + i ];

  		}

  		return this;

  	},

  	copyArray: function ( array ) {

  		this.array.set( array );

  		return this;

  	},

  	copyColorsArray: function ( colors ) {

  		var array = this.array, offset = 0;

  		for ( var i = 0, l = colors.length; i < l; i ++ ) {

  			var color = colors[ i ];

  			if ( color === undefined ) {

  				console.warn( 'THREE.BufferAttribute.copyColorsArray(): color is undefined', i );
  				color = new Color();

  			}

  			array[ offset ++ ] = color.r;
  			array[ offset ++ ] = color.g;
  			array[ offset ++ ] = color.b;

  		}

  		return this;

  	},

  	copyIndicesArray: function ( indices ) {

  		var array = this.array, offset = 0;

  		for ( var i = 0, l = indices.length; i < l; i ++ ) {

  			var index = indices[ i ];

  			array[ offset ++ ] = index.a;
  			array[ offset ++ ] = index.b;
  			array[ offset ++ ] = index.c;

  		}

  		return this;

  	},

  	copyVector2sArray: function ( vectors ) {

  		var array = this.array, offset = 0;

  		for ( var i = 0, l = vectors.length; i < l; i ++ ) {

  			var vector = vectors[ i ];

  			if ( vector === undefined ) {

  				console.warn( 'THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i );
  				vector = new Vector2();

  			}

  			array[ offset ++ ] = vector.x;
  			array[ offset ++ ] = vector.y;

  		}

  		return this;

  	},

  	copyVector3sArray: function ( vectors ) {

  		var array = this.array, offset = 0;

  		for ( var i = 0, l = vectors.length; i < l; i ++ ) {

  			var vector = vectors[ i ];

  			if ( vector === undefined ) {

  				console.warn( 'THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i );
  				vector = new Vector3();

  			}

  			array[ offset ++ ] = vector.x;
  			array[ offset ++ ] = vector.y;
  			array[ offset ++ ] = vector.z;

  		}

  		return this;

  	},

  	copyVector4sArray: function ( vectors ) {

  		var array = this.array, offset = 0;

  		for ( var i = 0, l = vectors.length; i < l; i ++ ) {

  			var vector = vectors[ i ];

  			if ( vector === undefined ) {

  				console.warn( 'THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i );
  				vector = new Vector4();

  			}

  			array[ offset ++ ] = vector.x;
  			array[ offset ++ ] = vector.y;
  			array[ offset ++ ] = vector.z;
  			array[ offset ++ ] = vector.w;

  		}

  		return this;

  	},

  	set: function ( value, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this.array.set( value, offset );

  		return this;

  	},

  	getX: function ( index ) {

  		return this.array[ index * this.itemSize ];

  	},

  	setX: function ( index, x ) {

  		this.array[ index * this.itemSize ] = x;

  		return this;

  	},

  	getY: function ( index ) {

  		return this.array[ index * this.itemSize + 1 ];

  	},

  	setY: function ( index, y ) {

  		this.array[ index * this.itemSize + 1 ] = y;

  		return this;

  	},

  	getZ: function ( index ) {

  		return this.array[ index * this.itemSize + 2 ];

  	},

  	setZ: function ( index, z ) {

  		this.array[ index * this.itemSize + 2 ] = z;

  		return this;

  	},

  	getW: function ( index ) {

  		return this.array[ index * this.itemSize + 3 ];

  	},

  	setW: function ( index, w ) {

  		this.array[ index * this.itemSize + 3 ] = w;

  		return this;

  	},

  	setXY: function ( index, x, y ) {

  		index *= this.itemSize;

  		this.array[ index + 0 ] = x;
  		this.array[ index + 1 ] = y;

  		return this;

  	},

  	setXYZ: function ( index, x, y, z ) {

  		index *= this.itemSize;

  		this.array[ index + 0 ] = x;
  		this.array[ index + 1 ] = y;
  		this.array[ index + 2 ] = z;

  		return this;

  	},

  	setXYZW: function ( index, x, y, z, w ) {

  		index *= this.itemSize;

  		this.array[ index + 0 ] = x;
  		this.array[ index + 1 ] = y;
  		this.array[ index + 2 ] = z;
  		this.array[ index + 3 ] = w;

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	}

  };

  //

  function Int8Attribute( array, itemSize ) {

  	return new BufferAttribute( new Int8Array( array ), itemSize );

  }

  function Uint8Attribute( array, itemSize ) {

  	return new BufferAttribute( new Uint8Array( array ), itemSize );

  }

  function Uint8ClampedAttribute( array, itemSize ) {

  	return new BufferAttribute( new Uint8ClampedArray( array ), itemSize );

  }

  function Int16Attribute( array, itemSize ) {

  	return new BufferAttribute( new Int16Array( array ), itemSize );

  }

  function Uint16Attribute( array, itemSize ) {

  	return new BufferAttribute( new Uint16Array( array ), itemSize );

  }

  function Int32Attribute( array, itemSize ) {

  	return new BufferAttribute( new Int32Array( array ), itemSize );

  }

  function Uint32Attribute( array, itemSize ) {

  	return new BufferAttribute( new Uint32Array( array ), itemSize );

  }

  function Float32Attribute( array, itemSize ) {

  	return new BufferAttribute( new Float32Array( array ), itemSize );

  }

  function Float64Attribute( array, itemSize ) {

  	return new BufferAttribute( new Float64Array( array ), itemSize );

  }

  // Deprecated

  function DynamicBufferAttribute( array, itemSize ) {

  	console.warn( 'THREE.DynamicBufferAttribute has been removed. Use new THREE.BufferAttribute().setDynamic( true ) instead.' );
  	return new BufferAttribute( array, itemSize ).setDynamic( true );

  }

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function Face3( a, b, c, normal, color, materialIndex ) {

  	this.a = a;
  	this.b = b;
  	this.c = c;

  	this.normal = (normal && normal.isVector3) ? normal : new Vector3();
  	this.vertexNormals = Array.isArray( normal ) ? normal : [];

  	this.color = (color && color.isColor) ? color : new Color();
  	this.vertexColors = Array.isArray( color ) ? color : [];

  	this.materialIndex = materialIndex !== undefined ? materialIndex : 0;

  };

  Face3.prototype = {

  	constructor: Face3,

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( source ) {

  		this.a = source.a;
  		this.b = source.b;
  		this.c = source.c;

  		this.normal.copy( source.normal );
  		this.color.copy( source.color );

  		this.materialIndex = source.materialIndex;

  		for ( var i = 0, il = source.vertexNormals.length; i < il; i ++ ) {

  			this.vertexNormals[ i ] = source.vertexNormals[ i ].clone();

  		}

  		for ( var i = 0, il = source.vertexColors.length; i < il; i ++ ) {

  			this.vertexColors[ i ] = source.vertexColors[ i ].clone();

  		}

  		return this;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author WestLangley / http://github.com/WestLangley
   * @author bhouston / http://clara.io
   */

  function Euler( x, y, z, order ) {

  	this._x = x || 0;
  	this._y = y || 0;
  	this._z = z || 0;
  	this._order = order || Euler.DefaultOrder;

  };

  Euler.RotationOrders = [ 'XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX' ];

  Euler.DefaultOrder = 'XYZ';

  Euler.prototype = {

  	constructor: Euler,

  	isEuler: true,

  	get x () {

  		return this._x;

  	},

  	set x ( value ) {

  		this._x = value;
  		this.onChangeCallback();

  	},

  	get y () {

  		return this._y;

  	},

  	set y ( value ) {

  		this._y = value;
  		this.onChangeCallback();

  	},

  	get z () {

  		return this._z;

  	},

  	set z ( value ) {

  		this._z = value;
  		this.onChangeCallback();

  	},

  	get order () {

  		return this._order;

  	},

  	set order ( value ) {

  		this._order = value;
  		this.onChangeCallback();

  	},

  	set: function ( x, y, z, order ) {

  		this._x = x;
  		this._y = y;
  		this._z = z;
  		this._order = order || this._order;

  		this.onChangeCallback();

  		return this;

  	},

  	clone: function () {

  		return new this.constructor( this._x, this._y, this._z, this._order );

  	},

  	copy: function ( euler ) {

  		this._x = euler._x;
  		this._y = euler._y;
  		this._z = euler._z;
  		this._order = euler._order;

  		this.onChangeCallback();

  		return this;

  	},

  	setFromRotationMatrix: function ( m, order, update ) {

  		var clamp = exports.Math.clamp;

  		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

  		var te = m.elements;
  		var m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ];
  		var m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ];
  		var m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];

  		order = order || this._order;

  		if ( order === 'XYZ' ) {

  			this._y = Math.asin( clamp( m13, - 1, 1 ) );

  			if ( Math.abs( m13 ) < 0.99999 ) {

  				this._x = Math.atan2( - m23, m33 );
  				this._z = Math.atan2( - m12, m11 );

  			} else {

  				this._x = Math.atan2( m32, m22 );
  				this._z = 0;

  			}

  		} else if ( order === 'YXZ' ) {

  			this._x = Math.asin( - clamp( m23, - 1, 1 ) );

  			if ( Math.abs( m23 ) < 0.99999 ) {

  				this._y = Math.atan2( m13, m33 );
  				this._z = Math.atan2( m21, m22 );

  			} else {

  				this._y = Math.atan2( - m31, m11 );
  				this._z = 0;

  			}

  		} else if ( order === 'ZXY' ) {

  			this._x = Math.asin( clamp( m32, - 1, 1 ) );

  			if ( Math.abs( m32 ) < 0.99999 ) {

  				this._y = Math.atan2( - m31, m33 );
  				this._z = Math.atan2( - m12, m22 );

  			} else {

  				this._y = 0;
  				this._z = Math.atan2( m21, m11 );

  			}

  		} else if ( order === 'ZYX' ) {

  			this._y = Math.asin( - clamp( m31, - 1, 1 ) );

  			if ( Math.abs( m31 ) < 0.99999 ) {

  				this._x = Math.atan2( m32, m33 );
  				this._z = Math.atan2( m21, m11 );

  			} else {

  				this._x = 0;
  				this._z = Math.atan2( - m12, m22 );

  			}

  		} else if ( order === 'YZX' ) {

  			this._z = Math.asin( clamp( m21, - 1, 1 ) );

  			if ( Math.abs( m21 ) < 0.99999 ) {

  				this._x = Math.atan2( - m23, m22 );
  				this._y = Math.atan2( - m31, m11 );

  			} else {

  				this._x = 0;
  				this._y = Math.atan2( m13, m33 );

  			}

  		} else if ( order === 'XZY' ) {

  			this._z = Math.asin( - clamp( m12, - 1, 1 ) );

  			if ( Math.abs( m12 ) < 0.99999 ) {

  				this._x = Math.atan2( m32, m22 );
  				this._y = Math.atan2( m13, m11 );

  			} else {

  				this._x = Math.atan2( - m23, m33 );
  				this._y = 0;

  			}

  		} else {

  			console.warn( 'THREE.Euler: .setFromRotationMatrix() given unsupported order: ' + order );

  		}

  		this._order = order;

  		if ( update !== false ) this.onChangeCallback();

  		return this;

  	},

  	setFromQuaternion: function () {

  		var matrix;

  		return function setFromQuaternion( q, order, update ) {

  			if ( matrix === undefined ) matrix = new Matrix4();

  			matrix.makeRotationFromQuaternion( q );

  			return this.setFromRotationMatrix( matrix, order, update );

  		};

  	}(),

  	setFromVector3: function ( v, order ) {

  		return this.set( v.x, v.y, v.z, order || this._order );

  	},

  	reorder: function () {

  		// WARNING: this discards revolution information -bhouston

  		var q = new Quaternion();

  		return function reorder( newOrder ) {

  			q.setFromEuler( this );

  			return this.setFromQuaternion( q, newOrder );

  		};

  	}(),

  	equals: function ( euler ) {

  		return ( euler._x === this._x ) && ( euler._y === this._y ) && ( euler._z === this._z ) && ( euler._order === this._order );

  	},

  	fromArray: function ( array ) {

  		this._x = array[ 0 ];
  		this._y = array[ 1 ];
  		this._z = array[ 2 ];
  		if ( array[ 3 ] !== undefined ) this._order = array[ 3 ];

  		this.onChangeCallback();

  		return this;

  	},

  	toArray: function ( array, offset ) {

  		if ( array === undefined ) array = [];
  		if ( offset === undefined ) offset = 0;

  		array[ offset ] = this._x;
  		array[ offset + 1 ] = this._y;
  		array[ offset + 2 ] = this._z;
  		array[ offset + 3 ] = this._order;

  		return array;

  	},

  	toVector3: function ( optionalResult ) {

  		if ( optionalResult ) {

  			return optionalResult.set( this._x, this._y, this._z );

  		} else {

  			return new Vector3( this._x, this._y, this._z );

  		}

  	},

  	onChange: function ( callback ) {

  		this.onChangeCallback = callback;

  		return this;

  	},

  	onChangeCallback: function () {}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function Layers() {

  	this.mask = 1;

  };

  Layers.prototype = {

  	constructor: Layers,

  	set: function ( channel ) {

  		this.mask = 1 << channel;

  	},

  	enable: function ( channel ) {

  		this.mask |= 1 << channel;

  	},

  	toggle: function ( channel ) {

  		this.mask ^= 1 << channel;

  	},

  	disable: function ( channel ) {

  		this.mask &= ~ ( 1 << channel );

  	},

  	test: function ( layers ) {

  		return ( this.mask & layers.mask ) !== 0;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   * @author WestLangley / http://github.com/WestLangley
   * @author elephantatwork / www.elephantatwork.ch
   */

  function Object3D() {

  	Object.defineProperty( this, 'id', { value: Object3DIdCount() } );

  	this.uuid = exports.Math.generateUUID();

  	this.name = '';
  	this.type = 'Object3D';

  	this.parent = null;
  	this.children = [];

  	this.up = Object3D.DefaultUp.clone();

  	var position = new Vector3();
  	var rotation = new Euler();
  	var quaternion = new Quaternion();
  	var scale = new Vector3( 1, 1, 1 );

  	function onRotationChange() {

  		quaternion.setFromEuler( rotation, false );

  	}

  	function onQuaternionChange() {

  		rotation.setFromQuaternion( quaternion, undefined, false );

  	}

  	rotation.onChange( onRotationChange );
  	quaternion.onChange( onQuaternionChange );

  	Object.defineProperties( this, {
  		position: {
  			enumerable: true,
  			value: position
  		},
  		rotation: {
  			enumerable: true,
  			value: rotation
  		},
  		quaternion: {
  			enumerable: true,
  			value: quaternion
  		},
  		scale: {
  			enumerable: true,
  			value: scale
  		},
  		modelViewMatrix: {
  			value: new Matrix4()
  		},
  		normalMatrix: {
  			value: new Matrix3()
  		}
  	} );

  	this.matrix = new Matrix4();
  	this.matrixWorld = new Matrix4();

  	this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
  	this.matrixWorldNeedsUpdate = false;

  	this.layers = new Layers();
  	this.visible = true;

  	this.castShadow = false;
  	this.receiveShadow = false;

  	this.frustumCulled = true;
  	this.renderOrder = 0;

  	this.userData = {};

  };

  Object3D.DefaultUp = new Vector3( 0, 1, 0 );
  Object3D.DefaultMatrixAutoUpdate = true;

  Object.assign( Object3D.prototype, EventDispatcher.prototype, {

  	isObject3D: true,

  	applyMatrix: function ( matrix ) {

  		this.matrix.multiplyMatrices( matrix, this.matrix );

  		this.matrix.decompose( this.position, this.quaternion, this.scale );

  	},

  	setRotationFromAxisAngle: function ( axis, angle ) {

  		// assumes axis is normalized

  		this.quaternion.setFromAxisAngle( axis, angle );

  	},

  	setRotationFromEuler: function ( euler ) {

  		this.quaternion.setFromEuler( euler, true );

  	},

  	setRotationFromMatrix: function ( m ) {

  		// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

  		this.quaternion.setFromRotationMatrix( m );

  	},

  	setRotationFromQuaternion: function ( q ) {

  		// assumes q is normalized

  		this.quaternion.copy( q );

  	},

  	rotateOnAxis: function () {

  		// rotate object on axis in object space
  		// axis is assumed to be normalized

  		var q1 = new Quaternion();

  		return function rotateOnAxis( axis, angle ) {

  			q1.setFromAxisAngle( axis, angle );

  			this.quaternion.multiply( q1 );

  			return this;

  		};

  	}(),

  	rotateX: function () {

  		var v1 = new Vector3( 1, 0, 0 );

  		return function rotateX( angle ) {

  			return this.rotateOnAxis( v1, angle );

  		};

  	}(),

  	rotateY: function () {

  		var v1 = new Vector3( 0, 1, 0 );

  		return function rotateY( angle ) {

  			return this.rotateOnAxis( v1, angle );

  		};

  	}(),

  	rotateZ: function () {

  		var v1 = new Vector3( 0, 0, 1 );

  		return function rotateZ( angle ) {

  			return this.rotateOnAxis( v1, angle );

  		};

  	}(),

  	translateOnAxis: function () {

  		// translate object by distance along axis in object space
  		// axis is assumed to be normalized

  		var v1 = new Vector3();

  		return function translateOnAxis( axis, distance ) {

  			v1.copy( axis ).applyQuaternion( this.quaternion );

  			this.position.add( v1.multiplyScalar( distance ) );

  			return this;

  		};

  	}(),

  	translateX: function () {

  		var v1 = new Vector3( 1, 0, 0 );

  		return function translateX( distance ) {

  			return this.translateOnAxis( v1, distance );

  		};

  	}(),

  	translateY: function () {

  		var v1 = new Vector3( 0, 1, 0 );

  		return function translateY( distance ) {

  			return this.translateOnAxis( v1, distance );

  		};

  	}(),

  	translateZ: function () {

  		var v1 = new Vector3( 0, 0, 1 );

  		return function translateZ( distance ) {

  			return this.translateOnAxis( v1, distance );

  		};

  	}(),

  	localToWorld: function ( vector ) {

  		return vector.applyMatrix4( this.matrixWorld );

  	},

  	worldToLocal: function () {

  		var m1 = new Matrix4();

  		return function worldToLocal( vector ) {

  			return vector.applyMatrix4( m1.getInverse( this.matrixWorld ) );

  		};

  	}(),

  	lookAt: function () {

  		// This routine does not support objects with rotated and/or translated parent(s)

  		var m1 = new Matrix4();

  		return function lookAt( vector ) {

  			m1.lookAt( vector, this.position, this.up );

  			this.quaternion.setFromRotationMatrix( m1 );

  		};

  	}(),

  	add: function ( object ) {

  		if ( arguments.length > 1 ) {

  			for ( var i = 0; i < arguments.length; i ++ ) {

  				this.add( arguments[ i ] );

  			}

  			return this;

  		}

  		if ( object === this ) {

  			console.error( "THREE.Object3D.add: object can't be added as a child of itself.", object );
  			return this;

  		}

  		if ( (object && object.isObject3D) ) {

  			if ( object.parent !== null ) {

  				object.parent.remove( object );

  			}

  			object.parent = this;
  			object.dispatchEvent( { type: 'added' } );

  			this.children.push( object );

  		} else {

  			console.error( "THREE.Object3D.add: object not an instance of THREE.Object3D.", object );

  		}

  		return this;

  	},

  	remove: function ( object ) {

  		if ( arguments.length > 1 ) {

  			for ( var i = 0; i < arguments.length; i ++ ) {

  				this.remove( arguments[ i ] );

  			}

  		}

  		var index = this.children.indexOf( object );

  		if ( index !== - 1 ) {

  			object.parent = null;

  			object.dispatchEvent( { type: 'removed' } );

  			this.children.splice( index, 1 );

  		}

  	},

  	getObjectById: function ( id ) {

  		return this.getObjectByProperty( 'id', id );

  	},

  	getObjectByName: function ( name ) {

  		return this.getObjectByProperty( 'name', name );

  	},

  	getObjectByProperty: function ( name, value ) {

  		if ( this[ name ] === value ) return this;

  		for ( var i = 0, l = this.children.length; i < l; i ++ ) {

  			var child = this.children[ i ];
  			var object = child.getObjectByProperty( name, value );

  			if ( object !== undefined ) {

  				return object;

  			}

  		}

  		return undefined;

  	},

  	getWorldPosition: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();

  		this.updateMatrixWorld( true );

  		return result.setFromMatrixPosition( this.matrixWorld );

  	},

  	getWorldQuaternion: function () {

  		var position = new Vector3();
  		var scale = new Vector3();

  		return function getWorldQuaternion( optionalTarget ) {

  			var result = optionalTarget || new Quaternion();

  			this.updateMatrixWorld( true );

  			this.matrixWorld.decompose( position, result, scale );

  			return result;

  		};

  	}(),

  	getWorldRotation: function () {

  		var quaternion = new Quaternion();

  		return function getWorldRotation( optionalTarget ) {

  			var result = optionalTarget || new Euler();

  			this.getWorldQuaternion( quaternion );

  			return result.setFromQuaternion( quaternion, this.rotation.order, false );

  		};

  	}(),

  	getWorldScale: function () {

  		var position = new Vector3();
  		var quaternion = new Quaternion();

  		return function getWorldScale( optionalTarget ) {

  			var result = optionalTarget || new Vector3();

  			this.updateMatrixWorld( true );

  			this.matrixWorld.decompose( position, quaternion, result );

  			return result;

  		};

  	}(),

  	getWorldDirection: function () {

  		var quaternion = new Quaternion();

  		return function getWorldDirection( optionalTarget ) {

  			var result = optionalTarget || new Vector3();

  			this.getWorldQuaternion( quaternion );

  			return result.set( 0, 0, 1 ).applyQuaternion( quaternion );

  		};

  	}(),

  	raycast: function () {},

  	traverse: function ( callback ) {

  		callback( this );

  		var children = this.children;

  		for ( var i = 0, l = children.length; i < l; i ++ ) {

  			children[ i ].traverse( callback );

  		}

  	},

  	traverseVisible: function ( callback ) {

  		if ( this.visible === false ) return;

  		callback( this );

  		var children = this.children;

  		for ( var i = 0, l = children.length; i < l; i ++ ) {

  			children[ i ].traverseVisible( callback );

  		}

  	},

  	traverseAncestors: function ( callback ) {

  		var parent = this.parent;

  		if ( parent !== null ) {

  			callback( parent );

  			parent.traverseAncestors( callback );

  		}

  	},

  	updateMatrix: function () {

  		this.matrix.compose( this.position, this.quaternion, this.scale );

  		this.matrixWorldNeedsUpdate = true;

  	},

  	updateMatrixWorld: function ( force ) {

  		if ( this.matrixAutoUpdate === true ) this.updateMatrix();

  		if ( this.matrixWorldNeedsUpdate === true || force === true ) {

  			if ( this.parent === null ) {

  				this.matrixWorld.copy( this.matrix );

  			} else {

  				this.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );

  			}

  			this.matrixWorldNeedsUpdate = false;

  			force = true;

  		}

  		// update children

  		for ( var i = 0, l = this.children.length; i < l; i ++ ) {

  			this.children[ i ].updateMatrixWorld( force );

  		}

  	},

  	toJSON: function ( meta ) {

  		// meta is '' when called from JSON.stringify
  		var isRootObject = ( meta === undefined || meta === '' );

  		var output = {};

  		// meta is a hash used to collect geometries, materials.
  		// not providing it implies that this is the root object
  		// being serialized.
  		if ( isRootObject ) {

  			// initialize meta obj
  			meta = {
  				geometries: {},
  				materials: {},
  				textures: {},
  				images: {}
  			};

  			output.metadata = {
  				version: 4.4,
  				type: 'Object',
  				generator: 'Object3D.toJSON'
  			};

  		}

  		// standard Object3D serialization

  		var object = {};

  		object.uuid = this.uuid;
  		object.type = this.type;

  		if ( this.name !== '' ) object.name = this.name;
  		if ( JSON.stringify( this.userData ) !== '{}' ) object.userData = this.userData;
  		if ( this.castShadow === true ) object.castShadow = true;
  		if ( this.receiveShadow === true ) object.receiveShadow = true;
  		if ( this.visible === false ) object.visible = false;

  		object.matrix = this.matrix.toArray();

  		//

  		if ( this.geometry !== undefined ) {

  			if ( meta.geometries[ this.geometry.uuid ] === undefined ) {

  				meta.geometries[ this.geometry.uuid ] = this.geometry.toJSON( meta );

  			}

  			object.geometry = this.geometry.uuid;

  		}

  		if ( this.material !== undefined ) {

  			if ( meta.materials[ this.material.uuid ] === undefined ) {

  				meta.materials[ this.material.uuid ] = this.material.toJSON( meta );

  			}

  			object.material = this.material.uuid;

  		}

  		//

  		if ( this.children.length > 0 ) {

  			object.children = [];

  			for ( var i = 0; i < this.children.length; i ++ ) {

  				object.children.push( this.children[ i ].toJSON( meta ).object );

  			}

  		}

  		if ( isRootObject ) {

  			var geometries = extractFromCache( meta.geometries );
  			var materials = extractFromCache( meta.materials );
  			var textures = extractFromCache( meta.textures );
  			var images = extractFromCache( meta.images );

  			if ( geometries.length > 0 ) output.geometries = geometries;
  			if ( materials.length > 0 ) output.materials = materials;
  			if ( textures.length > 0 ) output.textures = textures;
  			if ( images.length > 0 ) output.images = images;

  		}

  		output.object = object;

  		return output;

  		// extract data from the cache hash
  		// remove metadata on each item
  		// and return as array
  		function extractFromCache( cache ) {

  			var values = [];
  			for ( var key in cache ) {

  				var data = cache[ key ];
  				delete data.metadata;
  				values.push( data );

  			}
  			return values;

  		}

  	},

  	clone: function ( recursive ) {

  		return new this.constructor().copy( this, recursive );

  	},

  	copy: function ( source, recursive ) {

  		if ( recursive === undefined ) recursive = true;

  		this.name = source.name;

  		this.up.copy( source.up );

  		this.position.copy( source.position );
  		this.quaternion.copy( source.quaternion );
  		this.scale.copy( source.scale );

  		this.matrix.copy( source.matrix );
  		this.matrixWorld.copy( source.matrixWorld );

  		this.matrixAutoUpdate = source.matrixAutoUpdate;
  		this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;

  		this.visible = source.visible;

  		this.castShadow = source.castShadow;
  		this.receiveShadow = source.receiveShadow;

  		this.frustumCulled = source.frustumCulled;
  		this.renderOrder = source.renderOrder;

  		this.userData = JSON.parse( JSON.stringify( source.userData ) );

  		if ( recursive === true ) {

  			for ( var i = 0; i < source.children.length; i ++ ) {

  				var child = source.children[ i ];
  				this.add( child.clone() );

  			}

  		}

  		return this;

  	}

  } );

  var count$3 = 0;
  function Object3DIdCount() { return count$3++; };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author kile / http://kile.stravaganza.org/
   * @author alteredq / http://alteredqualia.com/
   * @author mikael emtinger / http://gomo.se/
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * @author bhouston / http://clara.io
   */

  function Geometry() {

  	Object.defineProperty( this, 'id', { value: GeometryIdCount() } );

  	this.uuid = exports.Math.generateUUID();

  	this.name = '';
  	this.type = 'Geometry';

  	this.vertices = [];
  	this.colors = [];
  	this.faces = [];
  	this.faceVertexUvs = [ [] ];

  	this.morphTargets = [];
  	this.morphNormals = [];

  	this.skinWeights = [];
  	this.skinIndices = [];

  	this.lineDistances = [];

  	this.boundingBox = null;
  	this.boundingSphere = null;

  	// update flags

  	this.elementsNeedUpdate = false;
  	this.verticesNeedUpdate = false;
  	this.uvsNeedUpdate = false;
  	this.normalsNeedUpdate = false;
  	this.colorsNeedUpdate = false;
  	this.lineDistancesNeedUpdate = false;
  	this.groupsNeedUpdate = false;

  };

  Object.assign( Geometry.prototype, EventDispatcher.prototype, {

  	isGeometry: true,

  	applyMatrix: function ( matrix ) {

  		var normalMatrix = new Matrix3().getNormalMatrix( matrix );

  		for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {

  			var vertex = this.vertices[ i ];
  			vertex.applyMatrix4( matrix );

  		}

  		for ( var i = 0, il = this.faces.length; i < il; i ++ ) {

  			var face = this.faces[ i ];
  			face.normal.applyMatrix3( normalMatrix ).normalize();

  			for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {

  				face.vertexNormals[ j ].applyMatrix3( normalMatrix ).normalize();

  			}

  		}

  		if ( this.boundingBox !== null ) {

  			this.computeBoundingBox();

  		}

  		if ( this.boundingSphere !== null ) {

  			this.computeBoundingSphere();

  		}

  		this.verticesNeedUpdate = true;
  		this.normalsNeedUpdate = true;

  		return this;

  	},

  	rotateX: function () {

  		// rotate geometry around world x-axis

  		var m1;

  		return function rotateX( angle ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeRotationX( angle );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	rotateY: function () {

  		// rotate geometry around world y-axis

  		var m1;

  		return function rotateY( angle ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeRotationY( angle );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	rotateZ: function () {

  		// rotate geometry around world z-axis

  		var m1;

  		return function rotateZ( angle ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeRotationZ( angle );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	translate: function () {

  		// translate geometry

  		var m1;

  		return function translate( x, y, z ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeTranslation( x, y, z );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	scale: function () {

  		// scale geometry

  		var m1;

  		return function scale( x, y, z ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeScale( x, y, z );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	lookAt: function () {

  		var obj;

  		return function lookAt( vector ) {

  			if ( obj === undefined ) obj = new Object3D();

  			obj.lookAt( vector );

  			obj.updateMatrix();

  			this.applyMatrix( obj.matrix );

  		};

  	}(),

  	fromBufferGeometry: function ( geometry ) {

  		var scope = this;

  		var indices = geometry.index !== null ? geometry.index.array : undefined;
  		var attributes = geometry.attributes;

  		var positions = attributes.position.array;
  		var normals = attributes.normal !== undefined ? attributes.normal.array : undefined;
  		var colors = attributes.color !== undefined ? attributes.color.array : undefined;
  		var uvs = attributes.uv !== undefined ? attributes.uv.array : undefined;
  		var uvs2 = attributes.uv2 !== undefined ? attributes.uv2.array : undefined;

  		if ( uvs2 !== undefined ) this.faceVertexUvs[ 1 ] = [];

  		var tempNormals = [];
  		var tempUVs = [];
  		var tempUVs2 = [];

  		for ( var i = 0, j = 0; i < positions.length; i += 3, j += 2 ) {

  			scope.vertices.push( new Vector3( positions[ i ], positions[ i + 1 ], positions[ i + 2 ] ) );

  			if ( normals !== undefined ) {

  				tempNormals.push( new Vector3( normals[ i ], normals[ i + 1 ], normals[ i + 2 ] ) );

  			}

  			if ( colors !== undefined ) {

  				scope.colors.push( new Color( colors[ i ], colors[ i + 1 ], colors[ i + 2 ] ) );

  			}

  			if ( uvs !== undefined ) {

  				tempUVs.push( new Vector2( uvs[ j ], uvs[ j + 1 ] ) );

  			}

  			if ( uvs2 !== undefined ) {

  				tempUVs2.push( new Vector2( uvs2[ j ], uvs2[ j + 1 ] ) );

  			}

  		}

  		function addFace( a, b, c, materialIndex ) {

  			var vertexNormals = normals !== undefined ? [ tempNormals[ a ].clone(), tempNormals[ b ].clone(), tempNormals[ c ].clone() ] : [];
  			var vertexColors = colors !== undefined ? [ scope.colors[ a ].clone(), scope.colors[ b ].clone(), scope.colors[ c ].clone() ] : [];

  			var face = new Face3( a, b, c, vertexNormals, vertexColors, materialIndex );

  			scope.faces.push( face );

  			if ( uvs !== undefined ) {

  				scope.faceVertexUvs[ 0 ].push( [ tempUVs[ a ].clone(), tempUVs[ b ].clone(), tempUVs[ c ].clone() ] );

  			}

  			if ( uvs2 !== undefined ) {

  				scope.faceVertexUvs[ 1 ].push( [ tempUVs2[ a ].clone(), tempUVs2[ b ].clone(), tempUVs2[ c ].clone() ] );

  			}

  		}

  		if ( indices !== undefined ) {

  			var groups = geometry.groups;

  			if ( groups.length > 0 ) {

  				for ( var i = 0; i < groups.length; i ++ ) {

  					var group = groups[ i ];

  					var start = group.start;
  					var count = group.count;

  					for ( var j = start, jl = start + count; j < jl; j += 3 ) {

  						addFace( indices[ j ], indices[ j + 1 ], indices[ j + 2 ], group.materialIndex  );

  					}

  				}

  			} else {

  				for ( var i = 0; i < indices.length; i += 3 ) {

  					addFace( indices[ i ], indices[ i + 1 ], indices[ i + 2 ] );

  				}

  			}

  		} else {

  			for ( var i = 0; i < positions.length / 3; i += 3 ) {

  				addFace( i, i + 1, i + 2 );

  			}

  		}

  		this.computeFaceNormals();

  		if ( geometry.boundingBox !== null ) {

  			this.boundingBox = geometry.boundingBox.clone();

  		}

  		if ( geometry.boundingSphere !== null ) {

  			this.boundingSphere = geometry.boundingSphere.clone();

  		}

  		return this;

  	},

  	center: function () {

  		this.computeBoundingBox();

  		var offset = this.boundingBox.center().negate();

  		this.translate( offset.x, offset.y, offset.z );

  		return offset;

  	},

  	normalize: function () {

  		this.computeBoundingSphere();

  		var center = this.boundingSphere.center;
  		var radius = this.boundingSphere.radius;

  		var s = radius === 0 ? 1 : 1.0 / radius;

  		var matrix = new Matrix4();
  		matrix.set(
  			s, 0, 0, - s * center.x,
  			0, s, 0, - s * center.y,
  			0, 0, s, - s * center.z,
  			0, 0, 0, 1
  		);

  		this.applyMatrix( matrix );

  		return this;

  	},

  	computeFaceNormals: function () {

  		var cb = new Vector3(), ab = new Vector3();

  		for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {

  			var face = this.faces[ f ];

  			var vA = this.vertices[ face.a ];
  			var vB = this.vertices[ face.b ];
  			var vC = this.vertices[ face.c ];

  			cb.subVectors( vC, vB );
  			ab.subVectors( vA, vB );
  			cb.cross( ab );

  			cb.normalize();

  			face.normal.copy( cb );

  		}

  	},

  	computeVertexNormals: function ( areaWeighted ) {

  		if ( areaWeighted === undefined ) areaWeighted = true;

  		var v, vl, f, fl, face, vertices;

  		vertices = new Array( this.vertices.length );

  		for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

  			vertices[ v ] = new Vector3();

  		}

  		if ( areaWeighted ) {

  			// vertex normals weighted by triangle areas
  			// http://www.iquilezles.org/www/articles/normals/normals.htm

  			var vA, vB, vC;
  			var cb = new Vector3(), ab = new Vector3();

  			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  				face = this.faces[ f ];

  				vA = this.vertices[ face.a ];
  				vB = this.vertices[ face.b ];
  				vC = this.vertices[ face.c ];

  				cb.subVectors( vC, vB );
  				ab.subVectors( vA, vB );
  				cb.cross( ab );

  				vertices[ face.a ].add( cb );
  				vertices[ face.b ].add( cb );
  				vertices[ face.c ].add( cb );

  			}

  		} else {

  			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  				face = this.faces[ f ];

  				vertices[ face.a ].add( face.normal );
  				vertices[ face.b ].add( face.normal );
  				vertices[ face.c ].add( face.normal );

  			}

  		}

  		for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

  			vertices[ v ].normalize();

  		}

  		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  			face = this.faces[ f ];

  			var vertexNormals = face.vertexNormals;

  			if ( vertexNormals.length === 3 ) {

  				vertexNormals[ 0 ].copy( vertices[ face.a ] );
  				vertexNormals[ 1 ].copy( vertices[ face.b ] );
  				vertexNormals[ 2 ].copy( vertices[ face.c ] );

  			} else {

  				vertexNormals[ 0 ] = vertices[ face.a ].clone();
  				vertexNormals[ 1 ] = vertices[ face.b ].clone();
  				vertexNormals[ 2 ] = vertices[ face.c ].clone();

  			}

  		}

  		if ( this.faces.length > 0 ) {

  			this.normalsNeedUpdate = true;

  		}

  	},

  	computeMorphNormals: function () {

  		var i, il, f, fl, face;

  		// save original normals
  		// - create temp variables on first access
  		//   otherwise just copy (for faster repeated calls)

  		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  			face = this.faces[ f ];

  			if ( ! face.__originalFaceNormal ) {

  				face.__originalFaceNormal = face.normal.clone();

  			} else {

  				face.__originalFaceNormal.copy( face.normal );

  			}

  			if ( ! face.__originalVertexNormals ) face.__originalVertexNormals = [];

  			for ( i = 0, il = face.vertexNormals.length; i < il; i ++ ) {

  				if ( ! face.__originalVertexNormals[ i ] ) {

  					face.__originalVertexNormals[ i ] = face.vertexNormals[ i ].clone();

  				} else {

  					face.__originalVertexNormals[ i ].copy( face.vertexNormals[ i ] );

  				}

  			}

  		}

  		// use temp geometry to compute face and vertex normals for each morph

  		var tmpGeo = new Geometry();
  		tmpGeo.faces = this.faces;

  		for ( i = 0, il = this.morphTargets.length; i < il; i ++ ) {

  			// create on first access

  			if ( ! this.morphNormals[ i ] ) {

  				this.morphNormals[ i ] = {};
  				this.morphNormals[ i ].faceNormals = [];
  				this.morphNormals[ i ].vertexNormals = [];

  				var dstNormalsFace = this.morphNormals[ i ].faceNormals;
  				var dstNormalsVertex = this.morphNormals[ i ].vertexNormals;

  				var faceNormal, vertexNormals;

  				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  					faceNormal = new Vector3();
  					vertexNormals = { a: new Vector3(), b: new Vector3(), c: new Vector3() };

  					dstNormalsFace.push( faceNormal );
  					dstNormalsVertex.push( vertexNormals );

  				}

  			}

  			var morphNormals = this.morphNormals[ i ];

  			// set vertices to morph target

  			tmpGeo.vertices = this.morphTargets[ i ].vertices;

  			// compute morph normals

  			tmpGeo.computeFaceNormals();
  			tmpGeo.computeVertexNormals();

  			// store morph normals

  			var faceNormal, vertexNormals;

  			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  				face = this.faces[ f ];

  				faceNormal = morphNormals.faceNormals[ f ];
  				vertexNormals = morphNormals.vertexNormals[ f ];

  				faceNormal.copy( face.normal );

  				vertexNormals.a.copy( face.vertexNormals[ 0 ] );
  				vertexNormals.b.copy( face.vertexNormals[ 1 ] );
  				vertexNormals.c.copy( face.vertexNormals[ 2 ] );

  			}

  		}

  		// restore original normals

  		for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

  			face = this.faces[ f ];

  			face.normal = face.__originalFaceNormal;
  			face.vertexNormals = face.__originalVertexNormals;

  		}

  	},

  	computeTangents: function () {

  		console.warn( 'THREE.Geometry: .computeTangents() has been removed.' );

  	},

  	computeLineDistances: function () {

  		var d = 0;
  		var vertices = this.vertices;

  		for ( var i = 0, il = vertices.length; i < il; i ++ ) {

  			if ( i > 0 ) {

  				d += vertices[ i ].distanceTo( vertices[ i - 1 ] );

  			}

  			this.lineDistances[ i ] = d;

  		}

  	},

  	computeBoundingBox: function () {

  		if ( this.boundingBox === null ) {

  			this.boundingBox = new Box3();

  		}

  		this.boundingBox.setFromPoints( this.vertices );

  	},

  	computeBoundingSphere: function () {

  		if ( this.boundingSphere === null ) {

  			this.boundingSphere = new Sphere();

  		}

  		this.boundingSphere.setFromPoints( this.vertices );

  	},

  	merge: function ( geometry, matrix, materialIndexOffset ) {

  		if ( (geometry && geometry.isGeometry) === false ) {

  			console.error( 'THREE.Geometry.merge(): geometry not an instance of THREE.Geometry.', geometry );
  			return;

  		}

  		var normalMatrix,
  		vertexOffset = this.vertices.length,
  		vertices1 = this.vertices,
  		vertices2 = geometry.vertices,
  		faces1 = this.faces,
  		faces2 = geometry.faces,
  		uvs1 = this.faceVertexUvs[ 0 ],
  		uvs2 = geometry.faceVertexUvs[ 0 ];

  		if ( materialIndexOffset === undefined ) materialIndexOffset = 0;

  		if ( matrix !== undefined ) {

  			normalMatrix = new Matrix3().getNormalMatrix( matrix );

  		}

  		// vertices

  		for ( var i = 0, il = vertices2.length; i < il; i ++ ) {

  			var vertex = vertices2[ i ];

  			var vertexCopy = vertex.clone();

  			if ( matrix !== undefined ) vertexCopy.applyMatrix4( matrix );

  			vertices1.push( vertexCopy );

  		}

  		// faces

  		for ( i = 0, il = faces2.length; i < il; i ++ ) {

  			var face = faces2[ i ], faceCopy, normal, color,
  			faceVertexNormals = face.vertexNormals,
  			faceVertexColors = face.vertexColors;

  			faceCopy = new Face3( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset );
  			faceCopy.normal.copy( face.normal );

  			if ( normalMatrix !== undefined ) {

  				faceCopy.normal.applyMatrix3( normalMatrix ).normalize();

  			}

  			for ( var j = 0, jl = faceVertexNormals.length; j < jl; j ++ ) {

  				normal = faceVertexNormals[ j ].clone();

  				if ( normalMatrix !== undefined ) {

  					normal.applyMatrix3( normalMatrix ).normalize();

  				}

  				faceCopy.vertexNormals.push( normal );

  			}

  			faceCopy.color.copy( face.color );

  			for ( var j = 0, jl = faceVertexColors.length; j < jl; j ++ ) {

  				color = faceVertexColors[ j ];
  				faceCopy.vertexColors.push( color.clone() );

  			}

  			faceCopy.materialIndex = face.materialIndex + materialIndexOffset;

  			faces1.push( faceCopy );

  		}

  		// uvs

  		for ( i = 0, il = uvs2.length; i < il; i ++ ) {

  			var uv = uvs2[ i ], uvCopy = [];

  			if ( uv === undefined ) {

  				continue;

  			}

  			for ( var j = 0, jl = uv.length; j < jl; j ++ ) {

  				uvCopy.push( uv[ j ].clone() );

  			}

  			uvs1.push( uvCopy );

  		}

  	},

  	mergeMesh: function ( mesh ) {

  		if ( (mesh && mesh.isMesh) === false ) {

  			console.error( 'THREE.Geometry.mergeMesh(): mesh not an instance of THREE.Mesh.', mesh );
  			return;

  		}

  		mesh.matrixAutoUpdate && mesh.updateMatrix();

  		this.merge( mesh.geometry, mesh.matrix );

  	},

  	/*
  	 * Checks for duplicate vertices with hashmap.
  	 * Duplicated vertices are removed
  	 * and faces' vertices are updated.
  	 */

  	mergeVertices: function () {

  		var verticesMap = {}; // Hashmap for looking up vertices by position coordinates (and making sure they are unique)
  		var unique = [], changes = [];

  		var v, key;
  		var precisionPoints = 4; // number of decimal points, e.g. 4 for epsilon of 0.0001
  		var precision = Math.pow( 10, precisionPoints );
  		var i, il, face;
  		var indices, j, jl;

  		for ( i = 0, il = this.vertices.length; i < il; i ++ ) {

  			v = this.vertices[ i ];
  			key = Math.round( v.x * precision ) + '_' + Math.round( v.y * precision ) + '_' + Math.round( v.z * precision );

  			if ( verticesMap[ key ] === undefined ) {

  				verticesMap[ key ] = i;
  				unique.push( this.vertices[ i ] );
  				changes[ i ] = unique.length - 1;

  			} else {

  				//console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);
  				changes[ i ] = changes[ verticesMap[ key ] ];

  			}

  		}


  		// if faces are completely degenerate after merging vertices, we
  		// have to remove them from the geometry.
  		var faceIndicesToRemove = [];

  		for ( i = 0, il = this.faces.length; i < il; i ++ ) {

  			face = this.faces[ i ];

  			face.a = changes[ face.a ];
  			face.b = changes[ face.b ];
  			face.c = changes[ face.c ];

  			indices = [ face.a, face.b, face.c ];

  			var dupIndex = - 1;

  			// if any duplicate vertices are found in a Face3
  			// we have to remove the face as nothing can be saved
  			for ( var n = 0; n < 3; n ++ ) {

  				if ( indices[ n ] === indices[ ( n + 1 ) % 3 ] ) {

  					dupIndex = n;
  					faceIndicesToRemove.push( i );
  					break;

  				}

  			}

  		}

  		for ( i = faceIndicesToRemove.length - 1; i >= 0; i -- ) {

  			var idx = faceIndicesToRemove[ i ];

  			this.faces.splice( idx, 1 );

  			for ( j = 0, jl = this.faceVertexUvs.length; j < jl; j ++ ) {

  				this.faceVertexUvs[ j ].splice( idx, 1 );

  			}

  		}

  		// Use unique set of vertices

  		var diff = this.vertices.length - unique.length;
  		this.vertices = unique;
  		return diff;

  	},

  	sortFacesByMaterialIndex: function () {

  		var faces = this.faces;
  		var length = faces.length;

  		// tag faces

  		for ( var i = 0; i < length; i ++ ) {

  			faces[ i ]._id = i;

  		}

  		// sort faces

  		function materialIndexSort( a, b ) {

  			return a.materialIndex - b.materialIndex;

  		}

  		faces.sort( materialIndexSort );

  		// sort uvs

  		var uvs1 = this.faceVertexUvs[ 0 ];
  		var uvs2 = this.faceVertexUvs[ 1 ];

  		var newUvs1, newUvs2;

  		if ( uvs1 && uvs1.length === length ) newUvs1 = [];
  		if ( uvs2 && uvs2.length === length ) newUvs2 = [];

  		for ( var i = 0; i < length; i ++ ) {

  			var id = faces[ i ]._id;

  			if ( newUvs1 ) newUvs1.push( uvs1[ id ] );
  			if ( newUvs2 ) newUvs2.push( uvs2[ id ] );

  		}

  		if ( newUvs1 ) this.faceVertexUvs[ 0 ] = newUvs1;
  		if ( newUvs2 ) this.faceVertexUvs[ 1 ] = newUvs2;

  	},

  	toJSON: function () {

  		var data = {
  			metadata: {
  				version: 4.4,
  				type: 'Geometry',
  				generator: 'Geometry.toJSON'
  			}
  		};

  		// standard Geometry serialization

  		data.uuid = this.uuid;
  		data.type = this.type;
  		if ( this.name !== '' ) data.name = this.name;

  		if ( this.parameters !== undefined ) {

  			var parameters = this.parameters;

  			for ( var key in parameters ) {

  				if ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];

  			}

  			return data;

  		}

  		var vertices = [];

  		for ( var i = 0; i < this.vertices.length; i ++ ) {

  			var vertex = this.vertices[ i ];
  			vertices.push( vertex.x, vertex.y, vertex.z );

  		}

  		var faces = [];
  		var normals = [];
  		var normalsHash = {};
  		var colors = [];
  		var colorsHash = {};
  		var uvs = [];
  		var uvsHash = {};

  		for ( var i = 0; i < this.faces.length; i ++ ) {

  			var face = this.faces[ i ];

  			var hasMaterial = true;
  			var hasFaceUv = false; // deprecated
  			var hasFaceVertexUv = this.faceVertexUvs[ 0 ][ i ] !== undefined;
  			var hasFaceNormal = face.normal.length() > 0;
  			var hasFaceVertexNormal = face.vertexNormals.length > 0;
  			var hasFaceColor = face.color.r !== 1 || face.color.g !== 1 || face.color.b !== 1;
  			var hasFaceVertexColor = face.vertexColors.length > 0;

  			var faceType = 0;

  			faceType = setBit( faceType, 0, 0 ); // isQuad
  			faceType = setBit( faceType, 1, hasMaterial );
  			faceType = setBit( faceType, 2, hasFaceUv );
  			faceType = setBit( faceType, 3, hasFaceVertexUv );
  			faceType = setBit( faceType, 4, hasFaceNormal );
  			faceType = setBit( faceType, 5, hasFaceVertexNormal );
  			faceType = setBit( faceType, 6, hasFaceColor );
  			faceType = setBit( faceType, 7, hasFaceVertexColor );

  			faces.push( faceType );
  			faces.push( face.a, face.b, face.c );
  			faces.push( face.materialIndex );

  			if ( hasFaceVertexUv ) {

  				var faceVertexUvs = this.faceVertexUvs[ 0 ][ i ];

  				faces.push(
  					getUvIndex( faceVertexUvs[ 0 ] ),
  					getUvIndex( faceVertexUvs[ 1 ] ),
  					getUvIndex( faceVertexUvs[ 2 ] )
  				);

  			}

  			if ( hasFaceNormal ) {

  				faces.push( getNormalIndex( face.normal ) );

  			}

  			if ( hasFaceVertexNormal ) {

  				var vertexNormals = face.vertexNormals;

  				faces.push(
  					getNormalIndex( vertexNormals[ 0 ] ),
  					getNormalIndex( vertexNormals[ 1 ] ),
  					getNormalIndex( vertexNormals[ 2 ] )
  				);

  			}

  			if ( hasFaceColor ) {

  				faces.push( getColorIndex( face.color ) );

  			}

  			if ( hasFaceVertexColor ) {

  				var vertexColors = face.vertexColors;

  				faces.push(
  					getColorIndex( vertexColors[ 0 ] ),
  					getColorIndex( vertexColors[ 1 ] ),
  					getColorIndex( vertexColors[ 2 ] )
  				);

  			}

  		}

  		function setBit( value, position, enabled ) {

  			return enabled ? value | ( 1 << position ) : value & ( ~ ( 1 << position ) );

  		}

  		function getNormalIndex( normal ) {

  			var hash = normal.x.toString() + normal.y.toString() + normal.z.toString();

  			if ( normalsHash[ hash ] !== undefined ) {

  				return normalsHash[ hash ];

  			}

  			normalsHash[ hash ] = normals.length / 3;
  			normals.push( normal.x, normal.y, normal.z );

  			return normalsHash[ hash ];

  		}

  		function getColorIndex( color ) {

  			var hash = color.r.toString() + color.g.toString() + color.b.toString();

  			if ( colorsHash[ hash ] !== undefined ) {

  				return colorsHash[ hash ];

  			}

  			colorsHash[ hash ] = colors.length;
  			colors.push( color.getHex() );

  			return colorsHash[ hash ];

  		}

  		function getUvIndex( uv ) {

  			var hash = uv.x.toString() + uv.y.toString();

  			if ( uvsHash[ hash ] !== undefined ) {

  				return uvsHash[ hash ];

  			}

  			uvsHash[ hash ] = uvs.length / 2;
  			uvs.push( uv.x, uv.y );

  			return uvsHash[ hash ];

  		}

  		data.data = {};

  		data.data.vertices = vertices;
  		data.data.normals = normals;
  		if ( colors.length > 0 ) data.data.colors = colors;
  		if ( uvs.length > 0 ) data.data.uvs = [ uvs ]; // temporal backward compatibility
  		data.data.faces = faces;

  		return data;

  	},

  	clone: function () {

  		/*
  		// Handle primitives

  		var parameters = this.parameters;

  		if ( parameters !== undefined ) {

  			var values = [];

  			for ( var key in parameters ) {

  				values.push( parameters[ key ] );

  			}

  			var geometry = Object.create( this.constructor.prototype );
  			this.constructor.apply( geometry, values );
  			return geometry;

  		}

  		return new this.constructor().copy( this );
  		*/

  		return new Geometry().copy( this );

  	},

  	copy: function ( source ) {

  		this.vertices = [];
  		this.faces = [];
  		this.faceVertexUvs = [ [] ];

  		var vertices = source.vertices;

  		for ( var i = 0, il = vertices.length; i < il; i ++ ) {

  			this.vertices.push( vertices[ i ].clone() );

  		}

  		var faces = source.faces;

  		for ( var i = 0, il = faces.length; i < il; i ++ ) {

  			this.faces.push( faces[ i ].clone() );

  		}

  		for ( var i = 0, il = source.faceVertexUvs.length; i < il; i ++ ) {

  			var faceVertexUvs = source.faceVertexUvs[ i ];

  			if ( this.faceVertexUvs[ i ] === undefined ) {

  				this.faceVertexUvs[ i ] = [];

  			}

  			for ( var j = 0, jl = faceVertexUvs.length; j < jl; j ++ ) {

  				var uvs = faceVertexUvs[ j ], uvsCopy = [];

  				for ( var k = 0, kl = uvs.length; k < kl; k ++ ) {

  					var uv = uvs[ k ];

  					uvsCopy.push( uv.clone() );

  				}

  				this.faceVertexUvs[ i ].push( uvsCopy );

  			}

  		}

  		return this;

  	},

  	dispose: function () {

  		this.dispatchEvent( { type: 'dispose' } );

  	}

  } );

  var count$2 = 0;
  function GeometryIdCount() { return count$2++; };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function DirectGeometry() {

  	Object.defineProperty( this, 'id', { value: GeometryIdCount() } );

  	this.uuid = exports.Math.generateUUID();

  	this.name = '';
  	this.type = 'DirectGeometry';

  	this.indices = [];
  	this.vertices = [];
  	this.normals = [];
  	this.colors = [];
  	this.uvs = [];
  	this.uvs2 = [];

  	this.groups = [];

  	this.morphTargets = {};

  	this.skinWeights = [];
  	this.skinIndices = [];

  	// this.lineDistances = [];

  	this.boundingBox = null;
  	this.boundingSphere = null;

  	// update flags

  	this.verticesNeedUpdate = false;
  	this.normalsNeedUpdate = false;
  	this.colorsNeedUpdate = false;
  	this.uvsNeedUpdate = false;
  	this.groupsNeedUpdate = false;

  };

  Object.assign( DirectGeometry.prototype, EventDispatcher.prototype, {

  	computeBoundingBox: Geometry.prototype.computeBoundingBox,
  	computeBoundingSphere: Geometry.prototype.computeBoundingSphere,

  	computeFaceNormals: function () {

  		console.warn( 'THREE.DirectGeometry: computeFaceNormals() is not a method of this type of geometry.' );

  	},

  	computeVertexNormals: function () {

  		console.warn( 'THREE.DirectGeometry: computeVertexNormals() is not a method of this type of geometry.' );

  	},

  	computeGroups: function ( geometry ) {

  		var group;
  		var groups = [];
  		var materialIndex;

  		var faces = geometry.faces;

  		for ( var i = 0; i < faces.length; i ++ ) {

  			var face = faces[ i ];

  			// materials

  			if ( face.materialIndex !== materialIndex ) {

  				materialIndex = face.materialIndex;

  				if ( group !== undefined ) {

  					group.count = ( i * 3 ) - group.start;
  					groups.push( group );

  				}

  				group = {
  					start: i * 3,
  					materialIndex: materialIndex
  				};

  			}

  		}

  		if ( group !== undefined ) {

  			group.count = ( i * 3 ) - group.start;
  			groups.push( group );

  		}

  		this.groups = groups;

  	},

  	fromGeometry: function ( geometry ) {

  		var faces = geometry.faces;
  		var vertices = geometry.vertices;
  		var faceVertexUvs = geometry.faceVertexUvs;

  		var hasFaceVertexUv = faceVertexUvs[ 0 ] && faceVertexUvs[ 0 ].length > 0;
  		var hasFaceVertexUv2 = faceVertexUvs[ 1 ] && faceVertexUvs[ 1 ].length > 0;

  		// morphs

  		var morphTargets = geometry.morphTargets;
  		var morphTargetsLength = morphTargets.length;

  		var morphTargetsPosition;

  		if ( morphTargetsLength > 0 ) {

  			morphTargetsPosition = [];

  			for ( var i = 0; i < morphTargetsLength; i ++ ) {

  				morphTargetsPosition[ i ] = [];

  			}

  			this.morphTargets.position = morphTargetsPosition;

  		}

  		var morphNormals = geometry.morphNormals;
  		var morphNormalsLength = morphNormals.length;

  		var morphTargetsNormal;

  		if ( morphNormalsLength > 0 ) {

  			morphTargetsNormal = [];

  			for ( var i = 0; i < morphNormalsLength; i ++ ) {

  				morphTargetsNormal[ i ] = [];

  			}

  			this.morphTargets.normal = morphTargetsNormal;

  		}

  		// skins

  		var skinIndices = geometry.skinIndices;
  		var skinWeights = geometry.skinWeights;

  		var hasSkinIndices = skinIndices.length === vertices.length;
  		var hasSkinWeights = skinWeights.length === vertices.length;

  		//

  		for ( var i = 0; i < faces.length; i ++ ) {

  			var face = faces[ i ];

  			this.vertices.push( vertices[ face.a ], vertices[ face.b ], vertices[ face.c ] );

  			var vertexNormals = face.vertexNormals;

  			if ( vertexNormals.length === 3 ) {

  				this.normals.push( vertexNormals[ 0 ], vertexNormals[ 1 ], vertexNormals[ 2 ] );

  			} else {

  				var normal = face.normal;

  				this.normals.push( normal, normal, normal );

  			}

  			var vertexColors = face.vertexColors;

  			if ( vertexColors.length === 3 ) {

  				this.colors.push( vertexColors[ 0 ], vertexColors[ 1 ], vertexColors[ 2 ] );

  			} else {

  				var color = face.color;

  				this.colors.push( color, color, color );

  			}

  			if ( hasFaceVertexUv === true ) {

  				var vertexUvs = faceVertexUvs[ 0 ][ i ];

  				if ( vertexUvs !== undefined ) {

  					this.uvs.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

  				} else {

  					console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv ', i );

  					this.uvs.push( new Vector2(), new Vector2(), new Vector2() );

  				}

  			}

  			if ( hasFaceVertexUv2 === true ) {

  				var vertexUvs = faceVertexUvs[ 1 ][ i ];

  				if ( vertexUvs !== undefined ) {

  					this.uvs2.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

  				} else {

  					console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv2 ', i );

  					this.uvs2.push( new Vector2(), new Vector2(), new Vector2() );

  				}

  			}

  			// morphs

  			for ( var j = 0; j < morphTargetsLength; j ++ ) {

  				var morphTarget = morphTargets[ j ].vertices;

  				morphTargetsPosition[ j ].push( morphTarget[ face.a ], morphTarget[ face.b ], morphTarget[ face.c ] );

  			}

  			for ( var j = 0; j < morphNormalsLength; j ++ ) {

  				var morphNormal = morphNormals[ j ].vertexNormals[ i ];

  				morphTargetsNormal[ j ].push( morphNormal.a, morphNormal.b, morphNormal.c );

  			}

  			// skins

  			if ( hasSkinIndices ) {

  				this.skinIndices.push( skinIndices[ face.a ], skinIndices[ face.b ], skinIndices[ face.c ] );

  			}

  			if ( hasSkinWeights ) {

  				this.skinWeights.push( skinWeights[ face.a ], skinWeights[ face.b ], skinWeights[ face.c ] );

  			}

  		}

  		this.computeGroups( geometry );

  		this.verticesNeedUpdate = geometry.verticesNeedUpdate;
  		this.normalsNeedUpdate = geometry.normalsNeedUpdate;
  		this.colorsNeedUpdate = geometry.colorsNeedUpdate;
  		this.uvsNeedUpdate = geometry.uvsNeedUpdate;
  		this.groupsNeedUpdate = geometry.groupsNeedUpdate;

  		return this;

  	},

  	dispose: function () {

  		this.dispatchEvent( { type: 'dispose' } );

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   */

  function BufferGeometry() {

  	Object.defineProperty( this, 'id', { value: GeometryIdCount() } );

  	this.uuid = exports.Math.generateUUID();

  	this.name = '';
  	this.type = 'BufferGeometry';

  	this.index = null;
  	this.attributes = {};

  	this.morphAttributes = {};

  	this.groups = [];

  	this.boundingBox = null;
  	this.boundingSphere = null;

  	this.drawRange = { start: 0, count: Infinity };

  };

  Object.assign( BufferGeometry.prototype, EventDispatcher.prototype, {

  	isBufferGeometry: true,

  	getIndex: function () {

  		return this.index;

  	},

  	setIndex: function ( index ) {

  		this.index = index;

  	},

  	addAttribute: function ( name, attribute ) {

  		if ( (attribute && attribute.isBufferAttribute) === false && (attribute && attribute.isInterleavedBufferAttribute) === false ) {

  			console.warn( 'THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).' );

  			this.addAttribute( name, new BufferAttribute( arguments[ 1 ], arguments[ 2 ] ) );

  			return;

  		}

  		if ( name === 'index' ) {

  			console.warn( 'THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.' );
  			this.setIndex( attribute );

  			return;

  		}

  		this.attributes[ name ] = attribute;

  		return this;

  	},

  	getAttribute: function ( name ) {

  		return this.attributes[ name ];

  	},

  	removeAttribute: function ( name ) {

  		delete this.attributes[ name ];

  		return this;

  	},

  	addGroup: function ( start, count, materialIndex ) {

  		this.groups.push( {

  			start: start,
  			count: count,
  			materialIndex: materialIndex !== undefined ? materialIndex : 0

  		} );

  	},

  	clearGroups: function () {

  		this.groups = [];

  	},

  	setDrawRange: function ( start, count ) {

  		this.drawRange.start = start;
  		this.drawRange.count = count;

  	},

  	applyMatrix: function ( matrix ) {

  		var position = this.attributes.position;

  		if ( position !== undefined ) {

  			matrix.applyToVector3Array( position.array );
  			position.needsUpdate = true;

  		}

  		var normal = this.attributes.normal;

  		if ( normal !== undefined ) {

  			var normalMatrix = new Matrix3().getNormalMatrix( matrix );

  			normalMatrix.applyToVector3Array( normal.array );
  			normal.needsUpdate = true;

  		}

  		if ( this.boundingBox !== null ) {

  			this.computeBoundingBox();

  		}

  		if ( this.boundingSphere !== null ) {

  			this.computeBoundingSphere();

  		}

  		return this;

  	},

  	rotateX: function () {

  		// rotate geometry around world x-axis

  		var m1;

  		return function rotateX( angle ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeRotationX( angle );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	rotateY: function () {

  		// rotate geometry around world y-axis

  		var m1;

  		return function rotateY( angle ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeRotationY( angle );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	rotateZ: function () {

  		// rotate geometry around world z-axis

  		var m1;

  		return function rotateZ( angle ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeRotationZ( angle );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	translate: function () {

  		// translate geometry

  		var m1;

  		return function translate( x, y, z ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeTranslation( x, y, z );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	scale: function () {

  		// scale geometry

  		var m1;

  		return function scale( x, y, z ) {

  			if ( m1 === undefined ) m1 = new Matrix4();

  			m1.makeScale( x, y, z );

  			this.applyMatrix( m1 );

  			return this;

  		};

  	}(),

  	lookAt: function () {

  		var obj;

  		return function lookAt( vector ) {

  			if ( obj === undefined ) obj = new Object3D();

  			obj.lookAt( vector );

  			obj.updateMatrix();

  			this.applyMatrix( obj.matrix );

  		};

  	}(),

  	center: function () {

  		this.computeBoundingBox();

  		var offset = this.boundingBox.center().negate();

  		this.translate( offset.x, offset.y, offset.z );

  		return offset;

  	},

  	setFromObject: function ( object ) {

  		// console.log( 'THREE.BufferGeometry.setFromObject(). Converting', object, this );

  		var geometry = object.geometry;

  		if ( (object && object.isPoints) || (object && object.isLine) ) {

  			var positions = new Float32Attribute( geometry.vertices.length * 3, 3 );
  			var colors = new Float32Attribute( geometry.colors.length * 3, 3 );

  			this.addAttribute( 'position', positions.copyVector3sArray( geometry.vertices ) );
  			this.addAttribute( 'color', colors.copyColorsArray( geometry.colors ) );

  			if ( geometry.lineDistances && geometry.lineDistances.length === geometry.vertices.length ) {

  				var lineDistances = new Float32Attribute( geometry.lineDistances.length, 1 );

  				this.addAttribute( 'lineDistance', lineDistances.copyArray( geometry.lineDistances ) );

  			}

  			if ( geometry.boundingSphere !== null ) {

  				this.boundingSphere = geometry.boundingSphere.clone();

  			}

  			if ( geometry.boundingBox !== null ) {

  				this.boundingBox = geometry.boundingBox.clone();

  			}

  		} else if ( (object && object.isMesh) ) {

  			if ( (geometry && geometry.isGeometry) ) {

  				this.fromGeometry( geometry );

  			}

  		}

  		return this;

  	},

  	updateFromObject: function ( object ) {

  		var geometry = object.geometry;

  		if ( (object && object.isMesh) ) {

  			var direct = geometry.__directGeometry;

  			if ( direct === undefined || geometry.elementsNeedUpdate === true ) {

  				return this.fromGeometry( geometry );

  			}

  			direct.verticesNeedUpdate = geometry.verticesNeedUpdate || geometry.elementsNeedUpdate;
  			direct.normalsNeedUpdate = geometry.normalsNeedUpdate || geometry.elementsNeedUpdate;
  			direct.colorsNeedUpdate = geometry.colorsNeedUpdate || geometry.elementsNeedUpdate;
  			direct.uvsNeedUpdate = geometry.uvsNeedUpdate || geometry.elementsNeedUpdate;
  			direct.groupsNeedUpdate = geometry.groupsNeedUpdate || geometry.elementsNeedUpdate;

  			geometry.elementsNeedUpdate = false;
  			geometry.verticesNeedUpdate = false;
  			geometry.normalsNeedUpdate = false;
  			geometry.colorsNeedUpdate = false;
  			geometry.uvsNeedUpdate = false;
  			geometry.groupsNeedUpdate = false;

  			geometry = direct;

  		}

  		var attribute;

  		if ( geometry.verticesNeedUpdate === true ) {

  			attribute = this.attributes.position;

  			if ( attribute !== undefined ) {

  				attribute.copyVector3sArray( geometry.vertices );
  				attribute.needsUpdate = true;

  			}

  			geometry.verticesNeedUpdate = false;

  		}

  		if ( geometry.normalsNeedUpdate === true ) {

  			attribute = this.attributes.normal;

  			if ( attribute !== undefined ) {

  				attribute.copyVector3sArray( geometry.normals );
  				attribute.needsUpdate = true;

  			}

  			geometry.normalsNeedUpdate = false;

  		}

  		if ( geometry.colorsNeedUpdate === true ) {

  			attribute = this.attributes.color;

  			if ( attribute !== undefined ) {

  				attribute.copyColorsArray( geometry.colors );
  				attribute.needsUpdate = true;

  			}

  			geometry.colorsNeedUpdate = false;

  		}

  		if ( geometry.uvsNeedUpdate ) {

  			attribute = this.attributes.uv;

  			if ( attribute !== undefined ) {

  				attribute.copyVector2sArray( geometry.uvs );
  				attribute.needsUpdate = true;

  			}

  			geometry.uvsNeedUpdate = false;

  		}

  		if ( geometry.lineDistancesNeedUpdate ) {

  			attribute = this.attributes.lineDistance;

  			if ( attribute !== undefined ) {

  				attribute.copyArray( geometry.lineDistances );
  				attribute.needsUpdate = true;

  			}

  			geometry.lineDistancesNeedUpdate = false;

  		}

  		if ( geometry.groupsNeedUpdate ) {

  			geometry.computeGroups( object.geometry );
  			this.groups = geometry.groups;

  			geometry.groupsNeedUpdate = false;

  		}

  		return this;

  	},

  	fromGeometry: function ( geometry ) {

  		geometry.__directGeometry = new DirectGeometry().fromGeometry( geometry );

  		return this.fromDirectGeometry( geometry.__directGeometry );

  	},

  	fromDirectGeometry: function ( geometry ) {

  		var positions = new Float32Array( geometry.vertices.length * 3 );
  		this.addAttribute( 'position', new BufferAttribute( positions, 3 ).copyVector3sArray( geometry.vertices ) );

  		if ( geometry.normals.length > 0 ) {

  			var normals = new Float32Array( geometry.normals.length * 3 );
  			this.addAttribute( 'normal', new BufferAttribute( normals, 3 ).copyVector3sArray( geometry.normals ) );

  		}

  		if ( geometry.colors.length > 0 ) {

  			var colors = new Float32Array( geometry.colors.length * 3 );
  			this.addAttribute( 'color', new BufferAttribute( colors, 3 ).copyColorsArray( geometry.colors ) );

  		}

  		if ( geometry.uvs.length > 0 ) {

  			var uvs = new Float32Array( geometry.uvs.length * 2 );
  			this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ).copyVector2sArray( geometry.uvs ) );

  		}

  		if ( geometry.uvs2.length > 0 ) {

  			var uvs2 = new Float32Array( geometry.uvs2.length * 2 );
  			this.addAttribute( 'uv2', new BufferAttribute( uvs2, 2 ).copyVector2sArray( geometry.uvs2 ) );

  		}

  		if ( geometry.indices.length > 0 ) {

  			var TypeArray = geometry.vertices.length > 65535 ? Uint32Array : Uint16Array;
  			var indices = new TypeArray( geometry.indices.length * 3 );
  			this.setIndex( new BufferAttribute( indices, 1 ).copyIndicesArray( geometry.indices ) );

  		}

  		// groups

  		this.groups = geometry.groups;

  		// morphs

  		for ( var name in geometry.morphTargets ) {

  			var array = [];
  			var morphTargets = geometry.morphTargets[ name ];

  			for ( var i = 0, l = morphTargets.length; i < l; i ++ ) {

  				var morphTarget = morphTargets[ i ];

  				var attribute = new Float32Attribute( morphTarget.length * 3, 3 );

  				array.push( attribute.copyVector3sArray( morphTarget ) );

  			}

  			this.morphAttributes[ name ] = array;

  		}

  		// skinning

  		if ( geometry.skinIndices.length > 0 ) {

  			var skinIndices = new Float32Attribute( geometry.skinIndices.length * 4, 4 );
  			this.addAttribute( 'skinIndex', skinIndices.copyVector4sArray( geometry.skinIndices ) );

  		}

  		if ( geometry.skinWeights.length > 0 ) {

  			var skinWeights = new Float32Attribute( geometry.skinWeights.length * 4, 4 );
  			this.addAttribute( 'skinWeight', skinWeights.copyVector4sArray( geometry.skinWeights ) );

  		}

  		//

  		if ( geometry.boundingSphere !== null ) {

  			this.boundingSphere = geometry.boundingSphere.clone();

  		}

  		if ( geometry.boundingBox !== null ) {

  			this.boundingBox = geometry.boundingBox.clone();

  		}

  		return this;

  	},

  	computeBoundingBox: function () {

  		if ( this.boundingBox === null ) {

  			this.boundingBox = new Box3();

  		}

  		var positions = this.attributes.position.array;

  		if ( positions !== undefined ) {

  			this.boundingBox.setFromArray( positions );

  		} else {

  			this.boundingBox.makeEmpty();

  		}

  		if ( isNaN( this.boundingBox.min.x ) || isNaN( this.boundingBox.min.y ) || isNaN( this.boundingBox.min.z ) ) {

  			console.error( 'THREE.BufferGeometry.computeBoundingBox: Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this );

  		}

  	},

  	computeBoundingSphere: function () {

  		var box = new Box3();
  		var vector = new Vector3();

  		return function computeBoundingSphere() {

  			if ( this.boundingSphere === null ) {

  				this.boundingSphere = new Sphere();

  			}

  			var positions = this.attributes.position;

  			if ( positions ) {

  				var array = positions.array;
  				var center = this.boundingSphere.center;

  				box.setFromArray( array );
  				box.center( center );

  				// hoping to find a boundingSphere with a radius smaller than the
  				// boundingSphere of the boundingBox: sqrt(3) smaller in the best case

  				var maxRadiusSq = 0;

  				for ( var i = 0, il = array.length; i < il; i += 3 ) {

  					vector.fromArray( array, i );
  					maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( vector ) );

  				}

  				this.boundingSphere.radius = Math.sqrt( maxRadiusSq );

  				if ( isNaN( this.boundingSphere.radius ) ) {

  					console.error( 'THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this );

  				}

  			}

  		};

  	}(),

  	computeFaceNormals: function () {

  		// backwards compatibility

  	},

  	computeVertexNormals: function () {

  		var index = this.index;
  		var attributes = this.attributes;
  		var groups = this.groups;

  		if ( attributes.position ) {

  			var positions = attributes.position.array;

  			if ( attributes.normal === undefined ) {

  				this.addAttribute( 'normal', new BufferAttribute( new Float32Array( positions.length ), 3 ) );

  			} else {

  				// reset existing normals to zero

  				var array = attributes.normal.array;

  				for ( var i = 0, il = array.length; i < il; i ++ ) {

  					array[ i ] = 0;

  				}

  			}

  			var normals = attributes.normal.array;

  			var vA, vB, vC,

  			pA = new Vector3(),
  			pB = new Vector3(),
  			pC = new Vector3(),

  			cb = new Vector3(),
  			ab = new Vector3();

  			// indexed elements

  			if ( index ) {

  				var indices = index.array;

  				if ( groups.length === 0 ) {

  					this.addGroup( 0, indices.length );

  				}

  				for ( var j = 0, jl = groups.length; j < jl; ++ j ) {

  					var group = groups[ j ];

  					var start = group.start;
  					var count = group.count;

  					for ( var i = start, il = start + count; i < il; i += 3 ) {

  						vA = indices[ i + 0 ] * 3;
  						vB = indices[ i + 1 ] * 3;
  						vC = indices[ i + 2 ] * 3;

  						pA.fromArray( positions, vA );
  						pB.fromArray( positions, vB );
  						pC.fromArray( positions, vC );

  						cb.subVectors( pC, pB );
  						ab.subVectors( pA, pB );
  						cb.cross( ab );

  						normals[ vA ] += cb.x;
  						normals[ vA + 1 ] += cb.y;
  						normals[ vA + 2 ] += cb.z;

  						normals[ vB ] += cb.x;
  						normals[ vB + 1 ] += cb.y;
  						normals[ vB + 2 ] += cb.z;

  						normals[ vC ] += cb.x;
  						normals[ vC + 1 ] += cb.y;
  						normals[ vC + 2 ] += cb.z;

  					}

  				}

  			} else {

  				// non-indexed elements (unconnected triangle soup)

  				for ( var i = 0, il = positions.length; i < il; i += 9 ) {

  					pA.fromArray( positions, i );
  					pB.fromArray( positions, i + 3 );
  					pC.fromArray( positions, i + 6 );

  					cb.subVectors( pC, pB );
  					ab.subVectors( pA, pB );
  					cb.cross( ab );

  					normals[ i ] = cb.x;
  					normals[ i + 1 ] = cb.y;
  					normals[ i + 2 ] = cb.z;

  					normals[ i + 3 ] = cb.x;
  					normals[ i + 4 ] = cb.y;
  					normals[ i + 5 ] = cb.z;

  					normals[ i + 6 ] = cb.x;
  					normals[ i + 7 ] = cb.y;
  					normals[ i + 8 ] = cb.z;

  				}

  			}

  			this.normalizeNormals();

  			attributes.normal.needsUpdate = true;

  		}

  	},

  	merge: function ( geometry, offset ) {

  		if ( (geometry && geometry.isBufferGeometry) === false ) {

  			console.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );
  			return;

  		}

  		if ( offset === undefined ) offset = 0;

  		var attributes = this.attributes;

  		for ( var key in attributes ) {

  			if ( geometry.attributes[ key ] === undefined ) continue;

  			var attribute1 = attributes[ key ];
  			var attributeArray1 = attribute1.array;

  			var attribute2 = geometry.attributes[ key ];
  			var attributeArray2 = attribute2.array;

  			var attributeSize = attribute2.itemSize;

  			for ( var i = 0, j = attributeSize * offset; i < attributeArray2.length; i ++, j ++ ) {

  				attributeArray1[ j ] = attributeArray2[ i ];

  			}

  		}

  		return this;

  	},

  	normalizeNormals: function () {

  		var normals = this.attributes.normal.array;

  		var x, y, z, n;

  		for ( var i = 0, il = normals.length; i < il; i += 3 ) {

  			x = normals[ i ];
  			y = normals[ i + 1 ];
  			z = normals[ i + 2 ];

  			n = 1.0 / Math.sqrt( x * x + y * y + z * z );

  			normals[ i ] *= n;
  			normals[ i + 1 ] *= n;
  			normals[ i + 2 ] *= n;

  		}

  	},

  	toNonIndexed: function () {

  		if ( this.index === null ) {

  			console.warn( 'THREE.BufferGeometry.toNonIndexed(): Geometry is already non-indexed.' );
  			return this;

  		}

  		var geometry2 = new BufferGeometry();

  		var indices = this.index.array;
  		var attributes = this.attributes;

  		for ( var name in attributes ) {

  			var attribute = attributes[ name ];

  			var array = attribute.array;
  			var itemSize = attribute.itemSize;

  			var array2 = new array.constructor( indices.length * itemSize );

  			var index = 0, index2 = 0;

  			for ( var i = 0, l = indices.length; i < l; i ++ ) {

  				index = indices[ i ] * itemSize;

  				for ( var j = 0; j < itemSize; j ++ ) {

  					array2[ index2 ++ ] = array[ index ++ ];

  				}

  			}

  			geometry2.addAttribute( name, new BufferAttribute( array2, itemSize ) );

  		}

  		return geometry2;

  	},

  	toJSON: function () {

  		var data = {
  			metadata: {
  				version: 4.4,
  				type: 'BufferGeometry',
  				generator: 'BufferGeometry.toJSON'
  			}
  		};

  		// standard BufferGeometry serialization

  		data.uuid = this.uuid;
  		data.type = this.type;
  		if ( this.name !== '' ) data.name = this.name;

  		if ( this.parameters !== undefined ) {

  			var parameters = this.parameters;

  			for ( var key in parameters ) {

  				if ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];

  			}

  			return data;

  		}

  		data.data = { attributes: {} };

  		var index = this.index;

  		if ( index !== null ) {

  			var array = Array.prototype.slice.call( index.array );

  			data.data.index = {
  				type: index.array.constructor.name,
  				array: array
  			};

  		}

  		var attributes = this.attributes;

  		for ( var key in attributes ) {

  			var attribute = attributes[ key ];

  			var array = Array.prototype.slice.call( attribute.array );

  			data.data.attributes[ key ] = {
  				itemSize: attribute.itemSize,
  				type: attribute.array.constructor.name,
  				array: array,
  				normalized: attribute.normalized
  			};

  		}

  		var groups = this.groups;

  		if ( groups.length > 0 ) {

  			data.data.groups = JSON.parse( JSON.stringify( groups ) );

  		}

  		var boundingSphere = this.boundingSphere;

  		if ( boundingSphere !== null ) {

  			data.data.boundingSphere = {
  				center: boundingSphere.center.toArray(),
  				radius: boundingSphere.radius
  			};

  		}

  		return data;

  	},

  	clone: function () {

  		/*
  		// Handle primitives

  		var parameters = this.parameters;

  		if ( parameters !== undefined ) {

  			var values = [];

  			for ( var key in parameters ) {

  				values.push( parameters[ key ] );

  			}

  			var geometry = Object.create( this.constructor.prototype );
  			this.constructor.apply( geometry, values );
  			return geometry;

  		}

  		return new this.constructor().copy( this );
  		*/

  		return new BufferGeometry().copy( this );

  	},

  	copy: function ( source ) {

  		var index = source.index;

  		if ( index !== null ) {

  			this.setIndex( index.clone() );

  		}

  		var attributes = source.attributes;

  		for ( var name in attributes ) {

  			var attribute = attributes[ name ];
  			this.addAttribute( name, attribute.clone() );

  		}

  		var groups = source.groups;

  		for ( var i = 0, l = groups.length; i < l; i ++ ) {

  			var group = groups[ i ];
  			this.addGroup( group.start, group.count, group.materialIndex );

  		}

  		return this;

  	},

  	dispose: function () {

  		this.dispatchEvent( { type: 'dispose' } );

  	}

  } );

  BufferGeometry.MaxIndex = 65535;

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLGeometries( gl, properties, info ) {

  	var geometries = {};

  	function get( object ) {

  		var geometry = object.geometry;

  		if ( geometries[ geometry.id ] !== undefined ) {

  			return geometries[ geometry.id ];

  		}

  		geometry.addEventListener( 'dispose', onGeometryDispose );

  		var buffergeometry;

  		if ( (geometry && geometry.isBufferGeometry) ) {

  			buffergeometry = geometry;

  		} else if ( (geometry && geometry.isGeometry) ) {

  			if ( geometry._bufferGeometry === undefined ) {

  				geometry._bufferGeometry = new BufferGeometry().setFromObject( object );

  			}

  			buffergeometry = geometry._bufferGeometry;

  		}

  		geometries[ geometry.id ] = buffergeometry;

  		info.memory.geometries ++;

  		return buffergeometry;

  	}

  	function onGeometryDispose( event ) {

  		var geometry = event.target;
  		var buffergeometry = geometries[ geometry.id ];

  		if ( buffergeometry.index !== null ) {

  			deleteAttribute( buffergeometry.index );

  		}

  		deleteAttributes( buffergeometry.attributes );

  		geometry.removeEventListener( 'dispose', onGeometryDispose );

  		delete geometries[ geometry.id ];

  		// TODO

  		var property = properties.get( geometry );

  		if ( property.wireframe ) {

  			deleteAttribute( property.wireframe );

  		}

  		properties.delete( geometry );

  		var bufferproperty = properties.get( buffergeometry );

  		if ( bufferproperty.wireframe ) {

  			deleteAttribute( bufferproperty.wireframe );

  		}

  		properties.delete( buffergeometry );

  		//

  		info.memory.geometries --;

  	}

  	function getAttributeBuffer( attribute ) {

  		if ( (attribute && attribute.isInterleavedBufferAttribute) ) {

  			return properties.get( attribute.data ).__webglBuffer;

  		}

  		return properties.get( attribute ).__webglBuffer;

  	}

  	function deleteAttribute( attribute ) {

  		var buffer = getAttributeBuffer( attribute );

  		if ( buffer !== undefined ) {

  			gl.deleteBuffer( buffer );
  			removeAttributeBuffer( attribute );

  		}

  	}

  	function deleteAttributes( attributes ) {

  		for ( var name in attributes ) {

  			deleteAttribute( attributes[ name ] );

  		}

  	}

  	function removeAttributeBuffer( attribute ) {

  		if ( (attribute && attribute.isInterleavedBufferAttribute) ) {

  			properties.delete( attribute.data );

  		} else {

  			properties.delete( attribute );

  		}

  	}

  	this.get = get;

  };

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLObjects( gl, properties, info ) {

  	var geometries = new WebGLGeometries( gl, properties, info );

  	//

  	function update( object ) {

  		// TODO: Avoid updating twice (when using shadowMap). Maybe add frame counter.

  		var geometry = geometries.get( object );

  		if ( (object.geometry && object.geometry.isGeometry) ) {

  			geometry.updateFromObject( object );

  		}

  		var index = geometry.index;
  		var attributes = geometry.attributes;

  		if ( index !== null ) {

  			updateAttribute( index, gl.ELEMENT_ARRAY_BUFFER );

  		}

  		for ( var name in attributes ) {

  			updateAttribute( attributes[ name ], gl.ARRAY_BUFFER );

  		}

  		// morph targets

  		var morphAttributes = geometry.morphAttributes;

  		for ( var name in morphAttributes ) {

  			var array = morphAttributes[ name ];

  			for ( var i = 0, l = array.length; i < l; i ++ ) {

  				updateAttribute( array[ i ], gl.ARRAY_BUFFER );

  			}

  		}

  		return geometry;

  	}

  	function updateAttribute( attribute, bufferType ) {

  		var data = ( (attribute && attribute.isInterleavedBufferAttribute) ) ? attribute.data : attribute;

  		var attributeProperties = properties.get( data );

  		if ( attributeProperties.__webglBuffer === undefined ) {

  			createBuffer( attributeProperties, data, bufferType );

  		} else if ( attributeProperties.version !== data.version ) {

  			updateBuffer( attributeProperties, data, bufferType );

  		}

  	}

  	function createBuffer( attributeProperties, data, bufferType ) {

  		attributeProperties.__webglBuffer = gl.createBuffer();
  		gl.bindBuffer( bufferType, attributeProperties.__webglBuffer );

  		var usage = data.dynamic ? gl.DYNAMIC_DRAW : gl.STATIC_DRAW;

  		gl.bufferData( bufferType, data.array, usage );

  		attributeProperties.version = data.version;

  	}

  	function updateBuffer( attributeProperties, data, bufferType ) {

  		gl.bindBuffer( bufferType, attributeProperties.__webglBuffer );

  		if ( data.dynamic === false || data.updateRange.count === - 1 ) {

  			// Not using update ranges

  			gl.bufferSubData( bufferType, 0, data.array );

  		} else if ( data.updateRange.count === 0 ) {

  			console.error( 'THREE.WebGLObjects.updateBuffer: dynamic THREE.BufferAttribute marked as needsUpdate but updateRange.count is 0, ensure you are using set methods or updating manually.' );

  		} else {

  			gl.bufferSubData( bufferType, data.updateRange.offset * data.array.BYTES_PER_ELEMENT,
  							  data.array.subarray( data.updateRange.offset, data.updateRange.offset + data.updateRange.count ) );

  			data.updateRange.count = 0; // reset range

  		}

  		attributeProperties.version = data.version;

  	}

  	function getAttributeBuffer( attribute ) {

  		if ( (attribute && attribute.isInterleavedBufferAttribute) ) {

  			return properties.get( attribute.data ).__webglBuffer;

  		}

  		return properties.get( attribute ).__webglBuffer;

  	}

  	function getWireframeAttribute( geometry ) {

  		var property = properties.get( geometry );

  		if ( property.wireframe !== undefined ) {

  			return property.wireframe;

  		}

  		var indices = [];

  		var index = geometry.index;
  		var attributes = geometry.attributes;
  		var position = attributes.position;

  		// console.time( 'wireframe' );

  		if ( index !== null ) {

  			var edges = {};
  			var array = index.array;

  			for ( var i = 0, l = array.length; i < l; i += 3 ) {

  				var a = array[ i + 0 ];
  				var b = array[ i + 1 ];
  				var c = array[ i + 2 ];

  				if ( checkEdge( edges, a, b ) ) indices.push( a, b );
  				if ( checkEdge( edges, b, c ) ) indices.push( b, c );
  				if ( checkEdge( edges, c, a ) ) indices.push( c, a );

  			}

  		} else {

  			var array = attributes.position.array;

  			for ( var i = 0, l = ( array.length / 3 ) - 1; i < l; i += 3 ) {

  				var a = i + 0;
  				var b = i + 1;
  				var c = i + 2;

  				indices.push( a, b, b, c, c, a );

  			}

  		}

  		// console.timeEnd( 'wireframe' );

  		var TypeArray = position.count > 65535 ? Uint32Array : Uint16Array;
  		var attribute = new BufferAttribute( new TypeArray( indices ), 1 );

  		updateAttribute( attribute, gl.ELEMENT_ARRAY_BUFFER );

  		property.wireframe = attribute;

  		return attribute;

  	}

  	function checkEdge( edges, a, b ) {

  		if ( a > b ) {

  			var tmp = a;
  			a = b;
  			b = tmp;

  		}

  		var list = edges[ a ];

  		if ( list === undefined ) {

  			edges[ a ] = [ b ];
  			return true;

  		} else if ( list.indexOf( b ) === -1 ) {

  			list.push( b );
  			return true;

  		}

  		return false;

  	}

  	this.getAttributeBuffer = getAttributeBuffer;
  	this.getWireframeAttribute = getWireframeAttribute;

  	this.update = update;

  };

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLLights() {

  	var lights = {};

  	this.get = function ( light ) {

  		if ( lights[ light.id ] !== undefined ) {

  			return lights[ light.id ];

  		}

  		var uniforms;

  		switch ( light.type ) {

  			case 'DirectionalLight':
  				uniforms = {
  					direction: new Vector3(),
  					color: new Color(),

  					shadow: false,
  					shadowBias: 0,
  					shadowRadius: 1,
  					shadowMapSize: new Vector2()
  				};
  				break;

  			case 'SpotLight':
  				uniforms = {
  					position: new Vector3(),
  					direction: new Vector3(),
  					color: new Color(),
  					distance: 0,
  					coneCos: 0,
  					penumbraCos: 0,
  					decay: 0,

  					shadow: false,
  					shadowBias: 0,
  					shadowRadius: 1,
  					shadowMapSize: new Vector2()
  				};
  				break;

  			case 'PointLight':
  				uniforms = {
  					position: new Vector3(),
  					color: new Color(),
  					distance: 0,
  					decay: 0,

  					shadow: false,
  					shadowBias: 0,
  					shadowRadius: 1,
  					shadowMapSize: new Vector2()
  				};
  				break;

  			case 'HemisphereLight':
  				uniforms = {
  					direction: new Vector3(),
  					skyColor: new Color(),
  					groundColor: new Color()
  				};
  				break;

  		}

  		lights[ light.id ] = uniforms;

  		return uniforms;

  	};

  };

  function WebGLCapabilities( gl, extensions, parameters ) {

  	var maxAnisotropy;

  	function getMaxAnisotropy() {

  		if ( maxAnisotropy !== undefined ) return maxAnisotropy;

  		var extension = extensions.get( 'EXT_texture_filter_anisotropic' );

  		if ( extension !== null ) {

  			maxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );

  		} else {

  			maxAnisotropy = 0;

  		}

  		return maxAnisotropy;

  	}

  	function getMaxPrecision( precision ) {

  		if ( precision === 'highp' ) {

  			if ( gl.getShaderPrecisionFormat( gl.VERTEX_SHADER, gl.HIGH_FLOAT ).precision > 0 &&
  			     gl.getShaderPrecisionFormat( gl.FRAGMENT_SHADER, gl.HIGH_FLOAT ).precision > 0 ) {

  				return 'highp';

  			}

  			precision = 'mediump';

  		}

  		if ( precision === 'mediump' ) {

  			if ( gl.getShaderPrecisionFormat( gl.VERTEX_SHADER, gl.MEDIUM_FLOAT ).precision > 0 &&
  			     gl.getShaderPrecisionFormat( gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT ).precision > 0 ) {

  				return 'mediump';

  			}

  		}

  		return 'lowp';

  	}

  	this.getMaxAnisotropy = getMaxAnisotropy;
  	this.getMaxPrecision = getMaxPrecision;

  	this.precision = parameters.precision !== undefined ? parameters.precision : 'highp';
  	this.logarithmicDepthBuffer = parameters.logarithmicDepthBuffer !== undefined ? parameters.logarithmicDepthBuffer : false;

  	this.maxTextures = gl.getParameter( gl.MAX_TEXTURE_IMAGE_UNITS );
  	this.maxVertexTextures = gl.getParameter( gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS );
  	this.maxTextureSize = gl.getParameter( gl.MAX_TEXTURE_SIZE );
  	this.maxCubemapSize = gl.getParameter( gl.MAX_CUBE_MAP_TEXTURE_SIZE );

  	this.maxAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
  	this.maxVertexUniforms = gl.getParameter( gl.MAX_VERTEX_UNIFORM_VECTORS );
  	this.maxVaryings = gl.getParameter( gl.MAX_VARYING_VECTORS );
  	this.maxFragmentUniforms = gl.getParameter( gl.MAX_FRAGMENT_UNIFORM_VECTORS );

  	this.vertexTextures = this.maxVertexTextures > 0;
  	this.floatFragmentTextures = !! extensions.get( 'OES_texture_float' );
  	this.floatVertexTextures = this.vertexTextures && this.floatFragmentTextures;

  	var _maxPrecision = getMaxPrecision( this.precision );

  	if ( _maxPrecision !== this.precision ) {

  		console.warn( 'THREE.WebGLRenderer:', this.precision, 'not supported, using', _maxPrecision, 'instead.' );
  		this.precision = _maxPrecision;

  	}

  	if ( this.logarithmicDepthBuffer ) {

  		this.logarithmicDepthBuffer = !! extensions.get( 'EXT_frag_depth' );

  	}

  };

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLExtensions( gl ) {

  	var extensions = {};

  	this.get = function ( name ) {

  		if ( extensions[ name ] !== undefined ) {

  			return extensions[ name ];

  		}

  		var extension;

  		switch ( name ) {

  			case 'WEBGL_depth_texture':
  				extension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );
  				break;

  			case 'EXT_texture_filter_anisotropic':
  				extension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );
  				break;

  			case 'WEBGL_compressed_texture_s3tc':
  				extension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );
  				break;

  			case 'WEBGL_compressed_texture_pvrtc':
  				extension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
  				break;

  			case 'WEBGL_compressed_texture_etc1':
  				extension = gl.getExtension( 'WEBGL_compressed_texture_etc1' );
  				break;

  			default:
  				extension = gl.getExtension( name );

  		}

  		if ( extension === null ) {

  			console.warn( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );

  		}

  		extensions[ name ] = extension;

  		return extension;

  	};

  };

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLIndexedBufferRenderer( _gl, extensions, _infoRender ) {

  	var mode;

  	function setMode( value ) {

  		mode = value;

  	}

  	var type, size;

  	function setIndex( index ) {

  		if ( index.array instanceof Uint32Array && extensions.get( 'OES_element_index_uint' ) ) {

  			type = _gl.UNSIGNED_INT;
  			size = 4;

  		} else {

  			type = _gl.UNSIGNED_SHORT;
  			size = 2;

  		}

  	}

  	function render( start, count ) {

  		_gl.drawElements( mode, count, type, start * size );

  		_infoRender.calls ++;
  		_infoRender.vertices += count;
  		if ( mode === _gl.TRIANGLES ) _infoRender.faces += count / 3;

  	}

  	function renderInstances( geometry, start, count ) {

  		var extension = extensions.get( 'ANGLE_instanced_arrays' );

  		if ( extension === null ) {

  			console.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
  			return;

  		}

  		extension.drawElementsInstancedANGLE( mode, count, type, start * size, geometry.maxInstancedCount );

  		_infoRender.calls ++;
  		_infoRender.vertices += count * geometry.maxInstancedCount;
  		if ( mode === _gl.TRIANGLES ) _infoRender.faces += geometry.maxInstancedCount * count / 3;
  	}

  	this.setMode = setMode;
  	this.setIndex = setIndex;
  	this.render = render;
  	this.renderInstances = renderInstances;

  };

  function WebGLClipping() {

  	var scope = this,

  		globalState = null,
  		numGlobalPlanes = 0,
  		localClippingEnabled = false,
  		renderingShadows = false,

  		plane = new Plane(),
  		viewNormalMatrix = new Matrix3(),

  		uniform = { value: null, needsUpdate: false };

  	this.uniform = uniform;
  	this.numPlanes = 0;

  	this.init = function( planes, enableLocalClipping, camera ) {

  		var enabled =
  			planes.length !== 0 ||
  			enableLocalClipping ||
  			// enable state of previous frame - the clipping code has to
  			// run another frame in order to reset the state:
  			numGlobalPlanes !== 0 ||
  			localClippingEnabled;

  		localClippingEnabled = enableLocalClipping;

  		globalState = projectPlanes( planes, camera, 0 );
  		numGlobalPlanes = planes.length;

  		return enabled;

  	};

  	this.beginShadows = function() {

  		renderingShadows = true;
  		projectPlanes( null );

  	};

  	this.endShadows = function() {

  		renderingShadows = false;
  		resetGlobalState();

  	};

  	this.setState = function( planes, clipShadows, camera, cache, fromCache ) {

  		if ( ! localClippingEnabled ||
  				planes === null || planes.length === 0 ||
  				renderingShadows && ! clipShadows ) {
  			// there's no local clipping

  			if ( renderingShadows ) {
  				// there's no global clipping

  				projectPlanes( null );

  			} else {

  				resetGlobalState();
  			}

  		} else {

  			var nGlobal = renderingShadows ? 0 : numGlobalPlanes,
  				lGlobal = nGlobal * 4,

  				dstArray = cache.clippingState || null;

  			uniform.value = dstArray; // ensure unique state

  			dstArray = projectPlanes( planes, camera, lGlobal, fromCache );

  			for ( var i = 0; i !== lGlobal; ++ i ) {

  				dstArray[ i ] = globalState[ i ];

  			}

  			cache.clippingState = dstArray;
  			this.numPlanes += nGlobal;

  		}


  	};

  	function resetGlobalState() {

  		if ( uniform.value !== globalState ) {

  			uniform.value = globalState;
  			uniform.needsUpdate = numGlobalPlanes > 0;

  		}

  		scope.numPlanes = numGlobalPlanes;

  	}

  	function projectPlanes( planes, camera, dstOffset, skipTransform ) {

  		var nPlanes = planes !== null ? planes.length : 0,
  			dstArray = null;

  		if ( nPlanes !== 0 ) {

  			dstArray = uniform.value;

  			if ( skipTransform !== true || dstArray === null ) {

  				var flatSize = dstOffset + nPlanes * 4,
  					viewMatrix = camera.matrixWorldInverse;

  				viewNormalMatrix.getNormalMatrix( viewMatrix );

  				if ( dstArray === null || dstArray.length < flatSize ) {

  					dstArray = new Float32Array( flatSize );

  				}

  				for ( var i = 0, i4 = dstOffset;
  									i !== nPlanes; ++ i, i4 += 4 ) {

  					plane.copy( planes[ i ] ).
  							applyMatrix4( viewMatrix, viewNormalMatrix );

  					plane.normal.toArray( dstArray, i4 );
  					dstArray[ i4 + 3 ] = plane.constant;

  				}

  			}

  			uniform.value = dstArray;
  			uniform.needsUpdate = true;

  		}

  		scope.numPlanes = nPlanes;
  		return dstArray;

  	}

  };

  /**
  * @author mrdoob / http://mrdoob.com/
  */

  function WebGLBufferRenderer( _gl, extensions, _infoRender ) {

  	var mode;

  	function setMode( value ) {

  		mode = value;

  	}

  	function render( start, count ) {

  		_gl.drawArrays( mode, start, count );

  		_infoRender.calls ++;
  		_infoRender.vertices += count;
  		if ( mode === _gl.TRIANGLES ) _infoRender.faces += count / 3;

  	}

  	function renderInstances( geometry ) {

  		var extension = extensions.get( 'ANGLE_instanced_arrays' );

  		if ( extension === null ) {

  			console.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
  			return;

  		}

  		var position = geometry.attributes.position;

  		var count = 0;

  		if ( (position && position.isInterleavedBufferAttribute) ) {

  			count = position.data.count;

  			extension.drawArraysInstancedANGLE( mode, 0, count, geometry.maxInstancedCount );

  		} else {

  			count = position.count;

  			extension.drawArraysInstancedANGLE( mode, 0, count, geometry.maxInstancedCount );

  		}

  		_infoRender.calls ++;
  		_infoRender.vertices += count * geometry.maxInstancedCount;
  		if ( mode === _gl.TRIANGLES ) _infoRender.faces += geometry.maxInstancedCount * count / 3;

  	}

  	this.setMode = setMode;
  	this.render = render;
  	this.renderInstances = renderInstances;

  };

  /**
   * @author alteredq / http://alteredqualia.com
   */

  function WebGLRenderTargetCube( width, height, options ) {

  	WebGLRenderTarget.call( this, width, height, options );

  	this.activeCubeFace = 0; // PX 0, NX 1, PY 2, NY 3, PZ 4, NZ 5
  	this.activeMipMapLevel = 0;

  };

  WebGLRenderTargetCube.prototype = Object.create( WebGLRenderTarget.prototype );
  WebGLRenderTargetCube.prototype.constructor = WebGLRenderTargetCube;

  WebGLRenderTargetCube.prototype.isWebGLRenderTargetCube = true;

  /**
   * @author Mugen87 / https://github.com/Mugen87
   */

  function BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {

  	BufferGeometry.call( this );

  	this.type = 'BoxBufferGeometry';

  	this.parameters = {
  		width: width,
  		height: height,
  		depth: depth,
  		widthSegments: widthSegments,
  		heightSegments: heightSegments,
  		depthSegments: depthSegments
  	};

  	var scope = this;

  	// segments
  	widthSegments = Math.floor( widthSegments ) || 1;
  	heightSegments = Math.floor( heightSegments ) || 1;
  	depthSegments = Math.floor( depthSegments ) || 1;

  	// these are used to calculate buffer length
  	var vertexCount = calculateVertexCount( widthSegments, heightSegments, depthSegments );
  	var indexCount = calculateIndexCount( widthSegments, heightSegments, depthSegments );

  	// buffers
  	var indices = new ( indexCount > 65535 ? Uint32Array : Uint16Array )( indexCount );
  	var vertices = new Float32Array( vertexCount * 3 );
  	var normals = new Float32Array( vertexCount * 3 );
  	var uvs = new Float32Array( vertexCount * 2 );

  	// offset variables
  	var vertexBufferOffset = 0;
  	var uvBufferOffset = 0;
  	var indexBufferOffset = 0;
  	var numberOfVertices = 0;

  	// group variables
  	var groupStart = 0;

  	// build each side of the box geometry
  	buildPlane( 'z', 'y', 'x', - 1, - 1, depth, height,   width,  depthSegments, heightSegments, 0 ); // px
  	buildPlane( 'z', 'y', 'x',   1, - 1, depth, height, - width,  depthSegments, heightSegments, 1 ); // nx
  	buildPlane( 'x', 'z', 'y',   1,   1, width, depth,    height, widthSegments, depthSegments,  2 ); // py
  	buildPlane( 'x', 'z', 'y',   1, - 1, width, depth,  - height, widthSegments, depthSegments,  3 ); // ny
  	buildPlane( 'x', 'y', 'z',   1, - 1, width, height,   depth,  widthSegments, heightSegments, 4 ); // pz
  	buildPlane( 'x', 'y', 'z', - 1, - 1, width, height, - depth,  widthSegments, heightSegments, 5 ); // nz

  	// build geometry
  	this.setIndex( new BufferAttribute( indices, 1 ) );
  	this.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );
  	this.addAttribute( 'normal', new BufferAttribute( normals, 3 ) );
  	this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ) );

  	// helper functions

  	function calculateVertexCount( w, h, d ) {

  		var vertices = 0;

  		// calculate the amount of vertices for each side (plane)
  		vertices += (w + 1) * (h + 1) * 2; // xy
  		vertices += (w + 1) * (d + 1) * 2; // xz
  		vertices += (d + 1) * (h + 1) * 2; // zy

  		return vertices;

  	}

  	function calculateIndexCount( w, h, d ) {

  		var index = 0;

  		// calculate the amount of squares for each side
  		index += w * h * 2; // xy
  		index += w * d * 2; // xz
  		index += d * h * 2; // zy

  		return index * 6; // two triangles per square => six vertices per square

  	}

  	function buildPlane( u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex ) {

  		var segmentWidth	= width / gridX;
  		var segmentHeight = height / gridY;

  		var widthHalf = width / 2;
  		var heightHalf = height / 2;
  		var depthHalf = depth / 2;

  		var gridX1 = gridX + 1;
  		var gridY1 = gridY + 1;

  		var vertexCounter = 0;
  		var groupCount = 0;

  		var vector = new Vector3();

  		// generate vertices, normals and uvs

  		for ( var iy = 0; iy < gridY1; iy ++ ) {

  			var y = iy * segmentHeight - heightHalf;

  			for ( var ix = 0; ix < gridX1; ix ++ ) {

  				var x = ix * segmentWidth - widthHalf;

  				// set values to correct vector component
  				vector[ u ] = x * udir;
  				vector[ v ] = y * vdir;
  				vector[ w ] = depthHalf;

  				// now apply vector to vertex buffer
  				vertices[ vertexBufferOffset ] = vector.x;
  				vertices[ vertexBufferOffset + 1 ] = vector.y;
  				vertices[ vertexBufferOffset + 2 ] = vector.z;

  				// set values to correct vector component
  				vector[ u ] = 0;
  				vector[ v ] = 0;
  				vector[ w ] = depth > 0 ? 1 : - 1;

  				// now apply vector to normal buffer
  				normals[ vertexBufferOffset ] = vector.x;
  				normals[ vertexBufferOffset + 1 ] = vector.y;
  				normals[ vertexBufferOffset + 2 ] = vector.z;

  				// uvs
  				uvs[ uvBufferOffset ] = ix / gridX;
  				uvs[ uvBufferOffset + 1 ] = 1 - ( iy / gridY );

  				// update offsets and counters
  				vertexBufferOffset += 3;
  				uvBufferOffset += 2;
  				vertexCounter += 1;

  			}

  		}

  		// 1. you need three indices to draw a single face
  		// 2. a single segment consists of two faces
  		// 3. so we need to generate six (2*3) indices per segment

  		for ( iy = 0; iy < gridY; iy ++ ) {

  			for ( ix = 0; ix < gridX; ix ++ ) {

  				// indices
  				var a = numberOfVertices + ix + gridX1 * iy;
  				var b = numberOfVertices + ix + gridX1 * ( iy + 1 );
  				var c = numberOfVertices + ( ix + 1 ) + gridX1 * ( iy + 1 );
  				var d = numberOfVertices + ( ix + 1 ) + gridX1 * iy;

  				// face one
  				indices[ indexBufferOffset ] = a;
  				indices[ indexBufferOffset + 1 ] = b;
  				indices[ indexBufferOffset + 2 ] = d;

  				// face two
  				indices[ indexBufferOffset + 3 ] = b;
  				indices[ indexBufferOffset + 4 ] = c;
  				indices[ indexBufferOffset + 5 ] = d;

  				// update offsets and counters
  				indexBufferOffset += 6;
  				groupCount += 6;

  			}

  		}

  		// add a group to the geometry. this will ensure multi material support
  		scope.addGroup( groupStart, groupCount, materialIndex );

  		// calculate new start value for groups
  		groupStart += groupCount;

  		// update total number of vertices
  		numberOfVertices += vertexCounter;

  	}

  };

  BoxBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  BoxBufferGeometry.prototype.constructor = BoxBufferGeometry;

  /**
   * @author bhouston / http://clara.io
   */

  function Ray( origin, direction ) {

  	this.origin = ( origin !== undefined ) ? origin : new Vector3();
  	this.direction = ( direction !== undefined ) ? direction : new Vector3();

  };

  Ray.prototype = {

  	constructor: Ray,

  	set: function ( origin, direction ) {

  		this.origin.copy( origin );
  		this.direction.copy( direction );

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( ray ) {

  		this.origin.copy( ray.origin );
  		this.direction.copy( ray.direction );

  		return this;

  	},

  	at: function ( t, optionalTarget ) {

  		var result = optionalTarget || new Vector3();

  		return result.copy( this.direction ).multiplyScalar( t ).add( this.origin );

  	},

  	lookAt: function ( v ) {

  		this.direction.copy( v ).sub( this.origin ).normalize();

  		return this;

  	},

  	recast: function () {

  		var v1 = new Vector3();

  		return function recast( t ) {

  			this.origin.copy( this.at( t, v1 ) );

  			return this;

  		};

  	}(),

  	closestPointToPoint: function ( point, optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		result.subVectors( point, this.origin );
  		var directionDistance = result.dot( this.direction );

  		if ( directionDistance < 0 ) {

  			return result.copy( this.origin );

  		}

  		return result.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );

  	},

  	distanceToPoint: function ( point ) {

  		return Math.sqrt( this.distanceSqToPoint( point ) );

  	},

  	distanceSqToPoint: function () {

  		var v1 = new Vector3();

  		return function distanceSqToPoint( point ) {

  			var directionDistance = v1.subVectors( point, this.origin ).dot( this.direction );

  			// point behind the ray

  			if ( directionDistance < 0 ) {

  				return this.origin.distanceToSquared( point );

  			}

  			v1.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );

  			return v1.distanceToSquared( point );

  		};

  	}(),

  	distanceSqToSegment: function () {

  		var segCenter = new Vector3();
  		var segDir = new Vector3();
  		var diff = new Vector3();

  		return function distanceSqToSegment( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {

  			// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h
  			// It returns the min distance between the ray and the segment
  			// defined by v0 and v1
  			// It can also set two optional targets :
  			// - The closest point on the ray
  			// - The closest point on the segment

  			segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );
  			segDir.copy( v1 ).sub( v0 ).normalize();
  			diff.copy( this.origin ).sub( segCenter );

  			var segExtent = v0.distanceTo( v1 ) * 0.5;
  			var a01 = - this.direction.dot( segDir );
  			var b0 = diff.dot( this.direction );
  			var b1 = - diff.dot( segDir );
  			var c = diff.lengthSq();
  			var det = Math.abs( 1 - a01 * a01 );
  			var s0, s1, sqrDist, extDet;

  			if ( det > 0 ) {

  				// The ray and segment are not parallel.

  				s0 = a01 * b1 - b0;
  				s1 = a01 * b0 - b1;
  				extDet = segExtent * det;

  				if ( s0 >= 0 ) {

  					if ( s1 >= - extDet ) {

  						if ( s1 <= extDet ) {

  							// region 0
  							// Minimum at interior points of ray and segment.

  							var invDet = 1 / det;
  							s0 *= invDet;
  							s1 *= invDet;
  							sqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;

  						} else {

  							// region 1

  							s1 = segExtent;
  							s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
  							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

  						}

  					} else {

  						// region 5

  						s1 = - segExtent;
  						s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
  						sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

  					}

  				} else {

  					if ( s1 <= - extDet ) {

  						// region 4

  						s0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );
  						s1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
  						sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

  					} else if ( s1 <= extDet ) {

  						// region 3

  						s0 = 0;
  						s1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );
  						sqrDist = s1 * ( s1 + 2 * b1 ) + c;

  					} else {

  						// region 2

  						s0 = Math.max( 0, - ( a01 * segExtent + b0 ) );
  						s1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
  						sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

  					}

  				}

  			} else {

  				// Ray and segment are parallel.

  				s1 = ( a01 > 0 ) ? - segExtent : segExtent;
  				s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
  				sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

  			}

  			if ( optionalPointOnRay ) {

  				optionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );

  			}

  			if ( optionalPointOnSegment ) {

  				optionalPointOnSegment.copy( segDir ).multiplyScalar( s1 ).add( segCenter );

  			}

  			return sqrDist;

  		};

  	}(),

  	intersectSphere: function () {

  		var v1 = new Vector3();

  		return function intersectSphere( sphere, optionalTarget ) {

  			v1.subVectors( sphere.center, this.origin );
  			var tca = v1.dot( this.direction );
  			var d2 = v1.dot( v1 ) - tca * tca;
  			var radius2 = sphere.radius * sphere.radius;

  			if ( d2 > radius2 ) return null;

  			var thc = Math.sqrt( radius2 - d2 );

  			// t0 = first intersect point - entrance on front of sphere
  			var t0 = tca - thc;

  			// t1 = second intersect point - exit point on back of sphere
  			var t1 = tca + thc;

  			// test to see if both t0 and t1 are behind the ray - if so, return null
  			if ( t0 < 0 && t1 < 0 ) return null;

  			// test to see if t0 is behind the ray:
  			// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,
  			// in order to always return an intersect point that is in front of the ray.
  			if ( t0 < 0 ) return this.at( t1, optionalTarget );

  			// else t0 is in front of the ray, so return the first collision point scaled by t0
  			return this.at( t0, optionalTarget );

  		};

  	}(),

  	intersectsSphere: function ( sphere ) {

  		return this.distanceToPoint( sphere.center ) <= sphere.radius;

  	},

  	distanceToPlane: function ( plane ) {

  		var denominator = plane.normal.dot( this.direction );

  		if ( denominator === 0 ) {

  			// line is coplanar, return origin
  			if ( plane.distanceToPoint( this.origin ) === 0 ) {

  				return 0;

  			}

  			// Null is preferable to undefined since undefined means.... it is undefined

  			return null;

  		}

  		var t = - ( this.origin.dot( plane.normal ) + plane.constant ) / denominator;

  		// Return if the ray never intersects the plane

  		return t >= 0 ? t :  null;

  	},

  	intersectPlane: function ( plane, optionalTarget ) {

  		var t = this.distanceToPlane( plane );

  		if ( t === null ) {

  			return null;

  		}

  		return this.at( t, optionalTarget );

  	},



  	intersectsPlane: function ( plane ) {

  		// check if the ray lies on the plane first

  		var distToPoint = plane.distanceToPoint( this.origin );

  		if ( distToPoint === 0 ) {

  			return true;

  		}

  		var denominator = plane.normal.dot( this.direction );

  		if ( denominator * distToPoint < 0 ) {

  			return true;

  		}

  		// ray origin is behind the plane (and is pointing behind it)

  		return false;

  	},

  	intersectBox: function ( box, optionalTarget ) {

  		var tmin, tmax, tymin, tymax, tzmin, tzmax;

  		var invdirx = 1 / this.direction.x,
  			invdiry = 1 / this.direction.y,
  			invdirz = 1 / this.direction.z;

  		var origin = this.origin;

  		if ( invdirx >= 0 ) {

  			tmin = ( box.min.x - origin.x ) * invdirx;
  			tmax = ( box.max.x - origin.x ) * invdirx;

  		} else {

  			tmin = ( box.max.x - origin.x ) * invdirx;
  			tmax = ( box.min.x - origin.x ) * invdirx;

  		}

  		if ( invdiry >= 0 ) {

  			tymin = ( box.min.y - origin.y ) * invdiry;
  			tymax = ( box.max.y - origin.y ) * invdiry;

  		} else {

  			tymin = ( box.max.y - origin.y ) * invdiry;
  			tymax = ( box.min.y - origin.y ) * invdiry;

  		}

  		if ( ( tmin > tymax ) || ( tymin > tmax ) ) return null;

  		// These lines also handle the case where tmin or tmax is NaN
  		// (result of 0 * Infinity). x !== x returns true if x is NaN

  		if ( tymin > tmin || tmin !== tmin ) tmin = tymin;

  		if ( tymax < tmax || tmax !== tmax ) tmax = tymax;

  		if ( invdirz >= 0 ) {

  			tzmin = ( box.min.z - origin.z ) * invdirz;
  			tzmax = ( box.max.z - origin.z ) * invdirz;

  		} else {

  			tzmin = ( box.max.z - origin.z ) * invdirz;
  			tzmax = ( box.min.z - origin.z ) * invdirz;

  		}

  		if ( ( tmin > tzmax ) || ( tzmin > tmax ) ) return null;

  		if ( tzmin > tmin || tmin !== tmin ) tmin = tzmin;

  		if ( tzmax < tmax || tmax !== tmax ) tmax = tzmax;

  		//return point closest to the ray (positive side)

  		if ( tmax < 0 ) return null;

  		return this.at( tmin >= 0 ? tmin : tmax, optionalTarget );

  	},

  	intersectsBox: ( function () {

  		var v = new Vector3();

  		return function intersectsBox( box ) {

  			return this.intersectBox( box, v ) !== null;

  		};

  	} )(),

  	intersectTriangle: function () {

  		// Compute the offset origin, edges, and normal.
  		var diff = new Vector3();
  		var edge1 = new Vector3();
  		var edge2 = new Vector3();
  		var normal = new Vector3();

  		return function intersectTriangle( a, b, c, backfaceCulling, optionalTarget ) {

  			// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h

  			edge1.subVectors( b, a );
  			edge2.subVectors( c, a );
  			normal.crossVectors( edge1, edge2 );

  			// Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,
  			// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
  			//   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
  			//   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
  			//   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)
  			var DdN = this.direction.dot( normal );
  			var sign;

  			if ( DdN > 0 ) {

  				if ( backfaceCulling ) return null;
  				sign = 1;

  			} else if ( DdN < 0 ) {

  				sign = - 1;
  				DdN = - DdN;

  			} else {

  				return null;

  			}

  			diff.subVectors( this.origin, a );
  			var DdQxE2 = sign * this.direction.dot( edge2.crossVectors( diff, edge2 ) );

  			// b1 < 0, no intersection
  			if ( DdQxE2 < 0 ) {

  				return null;

  			}

  			var DdE1xQ = sign * this.direction.dot( edge1.cross( diff ) );

  			// b2 < 0, no intersection
  			if ( DdE1xQ < 0 ) {

  				return null;

  			}

  			// b1+b2 > 1, no intersection
  			if ( DdQxE2 + DdE1xQ > DdN ) {

  				return null;

  			}

  			// Line intersects triangle, check if ray does.
  			var QdN = - sign * diff.dot( normal );

  			// t < 0, no intersection
  			if ( QdN < 0 ) {

  				return null;

  			}

  			// Ray intersects triangle.
  			return this.at( QdN / DdN, optionalTarget );

  		};

  	}(),

  	applyMatrix4: function ( matrix4 ) {

  		this.direction.add( this.origin ).applyMatrix4( matrix4 );
  		this.origin.applyMatrix4( matrix4 );
  		this.direction.sub( this.origin );
  		this.direction.normalize();

  		return this;

  	},

  	equals: function ( ray ) {

  		return ray.origin.equals( this.origin ) && ray.direction.equals( this.direction );

  	}

  };

  /**
   * @author bhouston / http://clara.io
   */

  function Line3( start, end ) {

  	this.start = ( start !== undefined ) ? start : new Vector3();
  	this.end = ( end !== undefined ) ? end : new Vector3();

  };

  Line3.prototype = {

  	constructor: Line3,

  	set: function ( start, end ) {

  		this.start.copy( start );
  		this.end.copy( end );

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( line ) {

  		this.start.copy( line.start );
  		this.end.copy( line.end );

  		return this;

  	},

  	center: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.addVectors( this.start, this.end ).multiplyScalar( 0.5 );

  	},

  	delta: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.subVectors( this.end, this.start );

  	},

  	distanceSq: function () {

  		return this.start.distanceToSquared( this.end );

  	},

  	distance: function () {

  		return this.start.distanceTo( this.end );

  	},

  	at: function ( t, optionalTarget ) {

  		var result = optionalTarget || new Vector3();

  		return this.delta( result ).multiplyScalar( t ).add( this.start );

  	},

  	closestPointToPointParameter: function () {

  		var startP = new Vector3();
  		var startEnd = new Vector3();

  		return function closestPointToPointParameter( point, clampToLine ) {

  			startP.subVectors( point, this.start );
  			startEnd.subVectors( this.end, this.start );

  			var startEnd2 = startEnd.dot( startEnd );
  			var startEnd_startP = startEnd.dot( startP );

  			var t = startEnd_startP / startEnd2;

  			if ( clampToLine ) {

  				t = exports.Math.clamp( t, 0, 1 );

  			}

  			return t;

  		};

  	}(),

  	closestPointToPoint: function ( point, clampToLine, optionalTarget ) {

  		var t = this.closestPointToPointParameter( point, clampToLine );

  		var result = optionalTarget || new Vector3();

  		return this.delta( result ).multiplyScalar( t ).add( this.start );

  	},

  	applyMatrix4: function ( matrix ) {

  		this.start.applyMatrix4( matrix );
  		this.end.applyMatrix4( matrix );

  		return this;

  	},

  	equals: function ( line ) {

  		return line.start.equals( this.start ) && line.end.equals( this.end );

  	}

  };

  /**
   * @author bhouston / http://clara.io
   * @author mrdoob / http://mrdoob.com/
   */

  function Triangle( a, b, c ) {

  	this.a = ( a !== undefined ) ? a : new Vector3();
  	this.b = ( b !== undefined ) ? b : new Vector3();
  	this.c = ( c !== undefined ) ? c : new Vector3();

  };

  Triangle.normal = function () {

  	var v0 = new Vector3();

  	return function normal( a, b, c, optionalTarget ) {

  		var result = optionalTarget || new Vector3();

  		result.subVectors( c, b );
  		v0.subVectors( a, b );
  		result.cross( v0 );

  		var resultLengthSq = result.lengthSq();
  		if ( resultLengthSq > 0 ) {

  			return result.multiplyScalar( 1 / Math.sqrt( resultLengthSq ) );

  		}

  		return result.set( 0, 0, 0 );

  	};

  }();

  // static/instance method to calculate barycentric coordinates
  // based on: http://www.blackpawn.com/texts/pointinpoly/default.html
  Triangle.barycoordFromPoint = function () {

  	var v0 = new Vector3();
  	var v1 = new Vector3();
  	var v2 = new Vector3();

  	return function barycoordFromPoint( point, a, b, c, optionalTarget ) {

  		v0.subVectors( c, a );
  		v1.subVectors( b, a );
  		v2.subVectors( point, a );

  		var dot00 = v0.dot( v0 );
  		var dot01 = v0.dot( v1 );
  		var dot02 = v0.dot( v2 );
  		var dot11 = v1.dot( v1 );
  		var dot12 = v1.dot( v2 );

  		var denom = ( dot00 * dot11 - dot01 * dot01 );

  		var result = optionalTarget || new Vector3();

  		// collinear or singular triangle
  		if ( denom === 0 ) {

  			// arbitrary location outside of triangle?
  			// not sure if this is the best idea, maybe should be returning undefined
  			return result.set( - 2, - 1, - 1 );

  		}

  		var invDenom = 1 / denom;
  		var u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;
  		var v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;

  		// barycentric coordinates must always sum to 1
  		return result.set( 1 - u - v, v, u );

  	};

  }();

  Triangle.containsPoint = function () {

  	var v1 = new Vector3();

  	return function containsPoint( point, a, b, c ) {

  		var result = Triangle.barycoordFromPoint( point, a, b, c, v1 );

  		return ( result.x >= 0 ) && ( result.y >= 0 ) && ( ( result.x + result.y ) <= 1 );

  	};

  }();

  Triangle.prototype = {

  	constructor: Triangle,

  	set: function ( a, b, c ) {

  		this.a.copy( a );
  		this.b.copy( b );
  		this.c.copy( c );

  		return this;

  	},

  	setFromPointsAndIndices: function ( points, i0, i1, i2 ) {

  		this.a.copy( points[ i0 ] );
  		this.b.copy( points[ i1 ] );
  		this.c.copy( points[ i2 ] );

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( triangle ) {

  		this.a.copy( triangle.a );
  		this.b.copy( triangle.b );
  		this.c.copy( triangle.c );

  		return this;

  	},

  	area: function () {

  		var v0 = new Vector3();
  		var v1 = new Vector3();

  		return function area() {

  			v0.subVectors( this.c, this.b );
  			v1.subVectors( this.a, this.b );

  			return v0.cross( v1 ).length() * 0.5;

  		};

  	}(),

  	midpoint: function ( optionalTarget ) {

  		var result = optionalTarget || new Vector3();
  		return result.addVectors( this.a, this.b ).add( this.c ).multiplyScalar( 1 / 3 );

  	},

  	normal: function ( optionalTarget ) {

  		return Triangle.normal( this.a, this.b, this.c, optionalTarget );

  	},

  	plane: function ( optionalTarget ) {

  		var result = optionalTarget || new Plane();

  		return result.setFromCoplanarPoints( this.a, this.b, this.c );

  	},

  	barycoordFromPoint: function ( point, optionalTarget ) {

  		return Triangle.barycoordFromPoint( point, this.a, this.b, this.c, optionalTarget );

  	},

  	containsPoint: function ( point ) {

  		return Triangle.containsPoint( point, this.a, this.b, this.c );

  	},

  	closestPointToPoint: function () {

  		var plane, edgeList, projectedPoint, closestPoint;

  		return function closestPointToPoint( point, optionalTarget ) {

  			if ( plane === undefined ) {

  				plane = new Plane();
  				edgeList = [ new Line3(), new Line3(), new Line3() ];
  				projectedPoint = new Vector3();
  				closestPoint = new Vector3();

  			}

  			var result = optionalTarget || new Vector3();
  			var minDistance = Infinity;

  			// project the point onto the plane of the triangle

  			plane.setFromCoplanarPoints( this.a, this.b, this.c );
  			plane.projectPoint( point, projectedPoint );

  			// check if the projection lies within the triangle

  			if( this.containsPoint( projectedPoint ) === true ) {

  				// if so, this is the closest point

  				result.copy( projectedPoint );

  			} else {

  				// if not, the point falls outside the triangle. the result is the closest point to the triangle's edges or vertices

  				edgeList[ 0 ].set( this.a, this.b );
  				edgeList[ 1 ].set( this.b, this.c );
  				edgeList[ 2 ].set( this.c, this.a );

  				for( var i = 0; i < edgeList.length; i ++ ) {

  					edgeList[ i ].closestPointToPoint( projectedPoint, true, closestPoint );

  					var distance = projectedPoint.distanceToSquared( closestPoint );

  					if( distance < minDistance ) {

  						minDistance = distance;

  						result.copy( closestPoint );

  					}

  				}

  			}

  			return result;

  		};

  	}(),

  	equals: function ( triangle ) {

  		return triangle.a.equals( this.a ) && triangle.b.equals( this.b ) && triangle.c.equals( this.c );

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  opacity: <float>,
   *  map: new THREE.Texture( <Image> ),
   *
   *  aoMap: new THREE.Texture( <Image> ),
   *  aoMapIntensity: <float>
   *
   *  specularMap: new THREE.Texture( <Image> ),
   *
   *  alphaMap: new THREE.Texture( <Image> ),
   *
   *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
   *  combine: THREE.Multiply,
   *  reflectivity: <float>,
   *  refractionRatio: <float>,
   *
   *  shading: THREE.SmoothShading,
   *  depthTest: <bool>,
   *  depthWrite: <bool>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>,
   *
   *  skinning: <bool>,
   *  morphTargets: <bool>
   * }
   */

  function MeshBasicMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'MeshBasicMaterial';

  	this.color = new Color( 0xffffff ); // emissive

  	this.map = null;

  	this.aoMap = null;
  	this.aoMapIntensity = 1.0;

  	this.specularMap = null;

  	this.alphaMap = null;

  	this.envMap = null;
  	this.combine = MultiplyOperation;
  	this.reflectivity = 1;
  	this.refractionRatio = 0.98;

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;
  	this.wireframeLinecap = 'round';
  	this.wireframeLinejoin = 'round';

  	this.skinning = false;
  	this.morphTargets = false;

  	this.lights = false;

  	this.setValues( parameters );

  };

  MeshBasicMaterial.prototype = Object.create( Material.prototype );
  MeshBasicMaterial.prototype.constructor = MeshBasicMaterial;

  MeshBasicMaterial.prototype.isMeshBasicMaterial = true;

  MeshBasicMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );

  	this.map = source.map;

  	this.aoMap = source.aoMap;
  	this.aoMapIntensity = source.aoMapIntensity;

  	this.specularMap = source.specularMap;

  	this.alphaMap = source.alphaMap;

  	this.envMap = source.envMap;
  	this.combine = source.combine;
  	this.reflectivity = source.reflectivity;
  	this.refractionRatio = source.refractionRatio;

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;
  	this.wireframeLinecap = source.wireframeLinecap;
  	this.wireframeLinejoin = source.wireframeLinejoin;

  	this.skinning = source.skinning;
  	this.morphTargets = source.morphTargets;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   * @author mikael emtinger / http://gomo.se/
   * @author jonobr1 / http://jonobr1.com/
   */

  function Mesh( geometry, material ) {

  	Object3D.call( this );

  	this.type = 'Mesh';

  	this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
  	this.material = material !== undefined ? material : new MeshBasicMaterial( { color: Math.random() * 0xffffff } );

  	this.drawMode = TrianglesDrawMode;

  	this.updateMorphTargets();

  };

  Mesh.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Mesh,

  	isMesh: true,

  	setDrawMode: function ( value ) {

  		this.drawMode = value;

  	},

  	copy: function ( source ) {

  		Object3D.prototype.copy.call( this, source );

  		this.drawMode = source.drawMode;

  		return this;

  	},

  	updateMorphTargets: function () {

  		if ( this.geometry.morphTargets !== undefined && this.geometry.morphTargets.length > 0 ) {

  			this.morphTargetBase = - 1;
  			this.morphTargetInfluences = [];
  			this.morphTargetDictionary = {};

  			for ( var m = 0, ml = this.geometry.morphTargets.length; m < ml; m ++ ) {

  				this.morphTargetInfluences.push( 0 );
  				this.morphTargetDictionary[ this.geometry.morphTargets[ m ].name ] = m;

  			}

  		}

  	},

  	getMorphTargetIndexByName: function ( name ) {

  		if ( this.morphTargetDictionary[ name ] !== undefined ) {

  			return this.morphTargetDictionary[ name ];

  		}

  		console.warn( 'THREE.Mesh.getMorphTargetIndexByName: morph target ' + name + ' does not exist. Returning 0.' );

  		return 0;

  	},

  	raycast: ( function () {

  		var inverseMatrix = new Matrix4();
  		var ray = new Ray();
  		var sphere = new Sphere();

  		var vA = new Vector3();
  		var vB = new Vector3();
  		var vC = new Vector3();

  		var tempA = new Vector3();
  		var tempB = new Vector3();
  		var tempC = new Vector3();

  		var uvA = new Vector2();
  		var uvB = new Vector2();
  		var uvC = new Vector2();

  		var barycoord = new Vector3();

  		var intersectionPoint = new Vector3();
  		var intersectionPointWorld = new Vector3();

  		function uvIntersection( point, p1, p2, p3, uv1, uv2, uv3 ) {

  			Triangle.barycoordFromPoint( point, p1, p2, p3, barycoord );

  			uv1.multiplyScalar( barycoord.x );
  			uv2.multiplyScalar( barycoord.y );
  			uv3.multiplyScalar( barycoord.z );

  			uv1.add( uv2 ).add( uv3 );

  			return uv1.clone();

  		}

  		function checkIntersection( object, raycaster, ray, pA, pB, pC, point ) {

  			var intersect;
  			var material = object.material;

  			if ( material.side === BackSide ) {

  				intersect = ray.intersectTriangle( pC, pB, pA, true, point );

  			} else {

  				intersect = ray.intersectTriangle( pA, pB, pC, material.side !== DoubleSide, point );

  			}

  			if ( intersect === null ) return null;

  			intersectionPointWorld.copy( point );
  			intersectionPointWorld.applyMatrix4( object.matrixWorld );

  			var distance = raycaster.ray.origin.distanceTo( intersectionPointWorld );

  			if ( distance < raycaster.near || distance > raycaster.far ) return null;

  			return {
  				distance: distance,
  				point: intersectionPointWorld.clone(),
  				object: object
  			};

  		}

  		function checkBufferGeometryIntersection( object, raycaster, ray, positions, uvs, a, b, c ) {

  			vA.fromArray( positions, a * 3 );
  			vB.fromArray( positions, b * 3 );
  			vC.fromArray( positions, c * 3 );

  			var intersection = checkIntersection( object, raycaster, ray, vA, vB, vC, intersectionPoint );

  			if ( intersection ) {

  				if ( uvs ) {

  					uvA.fromArray( uvs, a * 2 );
  					uvB.fromArray( uvs, b * 2 );
  					uvC.fromArray( uvs, c * 2 );

  					intersection.uv = uvIntersection( intersectionPoint,  vA, vB, vC,  uvA, uvB, uvC );

  				}

  				intersection.face = new Face3( a, b, c, Triangle.normal( vA, vB, vC ) );
  				intersection.faceIndex = a;

  			}

  			return intersection;

  		}

  		return function raycast( raycaster, intersects ) {

  			var geometry = this.geometry;
  			var material = this.material;
  			var matrixWorld = this.matrixWorld;

  			if ( material === undefined ) return;

  			// Checking boundingSphere distance to ray

  			if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();

  			sphere.copy( geometry.boundingSphere );
  			sphere.applyMatrix4( matrixWorld );

  			if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;

  			//

  			inverseMatrix.getInverse( matrixWorld );
  			ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );

  			// Check boundingBox before continuing

  			if ( geometry.boundingBox !== null ) {

  				if ( ray.intersectsBox( geometry.boundingBox ) === false ) return;

  			}

  			var uvs, intersection;

  			if ( (geometry && geometry.isBufferGeometry) ) {

  				var a, b, c;
  				var index = geometry.index;
  				var attributes = geometry.attributes;
  				var positions = attributes.position.array;

  				if ( attributes.uv !== undefined ) {

  					uvs = attributes.uv.array;

  				}

  				if ( index !== null ) {

  					var indices = index.array;

  					for ( var i = 0, l = indices.length; i < l; i += 3 ) {

  						a = indices[ i ];
  						b = indices[ i + 1 ];
  						c = indices[ i + 2 ];

  						intersection = checkBufferGeometryIntersection( this, raycaster, ray, positions, uvs, a, b, c );

  						if ( intersection ) {

  							intersection.faceIndex = Math.floor( i / 3 ); // triangle number in indices buffer semantics
  							intersects.push( intersection );

  						}

  					}

  				} else {


  					for ( var i = 0, l = positions.length; i < l; i += 9 ) {

  						a = i / 3;
  						b = a + 1;
  						c = a + 2;

  						intersection = checkBufferGeometryIntersection( this, raycaster, ray, positions, uvs, a, b, c );

  						if ( intersection ) {

  							intersection.index = a; // triangle number in positions buffer semantics
  							intersects.push( intersection );

  						}

  					}

  				}

  			} else if ( (geometry && geometry.isGeometry) ) {

  				var fvA, fvB, fvC;
  				var isFaceMaterial = (material && material.isMultiMaterial);
  				var materials = isFaceMaterial === true ? material.materials : null;

  				var vertices = geometry.vertices;
  				var faces = geometry.faces;
  				var faceVertexUvs = geometry.faceVertexUvs[ 0 ];
  				if ( faceVertexUvs.length > 0 ) uvs = faceVertexUvs;

  				for ( var f = 0, fl = faces.length; f < fl; f ++ ) {

  					var face = faces[ f ];
  					var faceMaterial = isFaceMaterial === true ? materials[ face.materialIndex ] : material;

  					if ( faceMaterial === undefined ) continue;

  					fvA = vertices[ face.a ];
  					fvB = vertices[ face.b ];
  					fvC = vertices[ face.c ];

  					if ( faceMaterial.morphTargets === true ) {

  						var morphTargets = geometry.morphTargets;
  						var morphInfluences = this.morphTargetInfluences;

  						vA.set( 0, 0, 0 );
  						vB.set( 0, 0, 0 );
  						vC.set( 0, 0, 0 );

  						for ( var t = 0, tl = morphTargets.length; t < tl; t ++ ) {

  							var influence = morphInfluences[ t ];

  							if ( influence === 0 ) continue;

  							var targets = morphTargets[ t ].vertices;

  							vA.addScaledVector( tempA.subVectors( targets[ face.a ], fvA ), influence );
  							vB.addScaledVector( tempB.subVectors( targets[ face.b ], fvB ), influence );
  							vC.addScaledVector( tempC.subVectors( targets[ face.c ], fvC ), influence );

  						}

  						vA.add( fvA );
  						vB.add( fvB );
  						vC.add( fvC );

  						fvA = vA;
  						fvB = vB;
  						fvC = vC;

  					}

  					intersection = checkIntersection( this, raycaster, ray, fvA, fvB, fvC, intersectionPoint );

  					if ( intersection ) {

  						if ( uvs ) {

  							var uvs_f = uvs[ f ];
  							uvA.copy( uvs_f[ 0 ] );
  							uvB.copy( uvs_f[ 1 ] );
  							uvC.copy( uvs_f[ 2 ] );

  							intersection.uv = uvIntersection( intersectionPoint, fvA, fvB, fvC, uvA, uvB, uvC );

  						}

  						intersection.face = face;
  						intersection.faceIndex = f;
  						intersects.push( intersection );

  					}

  				}

  			}

  		};

  	}() ),

  	clone: function () {

  		return new this.constructor( this.geometry, this.material ).copy( this );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as
   */

  function PlaneBufferGeometry( width, height, widthSegments, heightSegments ) {

  	BufferGeometry.call( this );

  	this.type = 'PlaneBufferGeometry';

  	this.parameters = {
  		width: width,
  		height: height,
  		widthSegments: widthSegments,
  		heightSegments: heightSegments
  	};

  	var width_half = width / 2;
  	var height_half = height / 2;

  	var gridX = Math.floor( widthSegments ) || 1;
  	var gridY = Math.floor( heightSegments ) || 1;

  	var gridX1 = gridX + 1;
  	var gridY1 = gridY + 1;

  	var segment_width = width / gridX;
  	var segment_height = height / gridY;

  	var vertices = new Float32Array( gridX1 * gridY1 * 3 );
  	var normals = new Float32Array( gridX1 * gridY1 * 3 );
  	var uvs = new Float32Array( gridX1 * gridY1 * 2 );

  	var offset = 0;
  	var offset2 = 0;

  	for ( var iy = 0; iy < gridY1; iy ++ ) {

  		var y = iy * segment_height - height_half;

  		for ( var ix = 0; ix < gridX1; ix ++ ) {

  			var x = ix * segment_width - width_half;

  			vertices[ offset ] = x;
  			vertices[ offset + 1 ] = - y;

  			normals[ offset + 2 ] = 1;

  			uvs[ offset2 ] = ix / gridX;
  			uvs[ offset2 + 1 ] = 1 - ( iy / gridY );

  			offset += 3;
  			offset2 += 2;

  		}

  	}

  	offset = 0;

  	var indices = new ( ( vertices.length / 3 ) > 65535 ? Uint32Array : Uint16Array )( gridX * gridY * 6 );

  	for ( var iy = 0; iy < gridY; iy ++ ) {

  		for ( var ix = 0; ix < gridX; ix ++ ) {

  			var a = ix + gridX1 * iy;
  			var b = ix + gridX1 * ( iy + 1 );
  			var c = ( ix + 1 ) + gridX1 * ( iy + 1 );
  			var d = ( ix + 1 ) + gridX1 * iy;

  			indices[ offset ] = a;
  			indices[ offset + 1 ] = b;
  			indices[ offset + 2 ] = d;

  			indices[ offset + 3 ] = b;
  			indices[ offset + 4 ] = c;
  			indices[ offset + 5 ] = d;

  			offset += 6;

  		}

  	}

  	this.setIndex( new BufferAttribute( indices, 1 ) );
  	this.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );
  	this.addAttribute( 'normal', new BufferAttribute( normals, 3 ) );
  	this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ) );

  };

  PlaneBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  PlaneBufferGeometry.prototype.constructor = PlaneBufferGeometry;

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author mikael emtinger / http://gomo.se/
   * @author WestLangley / http://github.com/WestLangley
  */

  function Camera() {

  	Object3D.call( this );

  	this.type = 'Camera';

  	this.matrixWorldInverse = new Matrix4();
  	this.projectionMatrix = new Matrix4();

  };

  Camera.prototype = Object.create( Object3D.prototype );
  Camera.prototype.constructor = Camera;

  Camera.prototype.isCamera = true;

  Camera.prototype.getWorldDirection = function () {

  	var quaternion = new Quaternion();

  	return function getWorldDirection( optionalTarget ) {

  		var result = optionalTarget || new Vector3();

  		this.getWorldQuaternion( quaternion );

  		return result.set( 0, 0, - 1 ).applyQuaternion( quaternion );

  	};

  }();

  Camera.prototype.lookAt = function () {

  	// This routine does not support cameras with rotated and/or translated parent(s)

  	var m1 = new Matrix4();

  	return function lookAt( vector ) {

  		m1.lookAt( this.position, vector, this.up );

  		this.quaternion.setFromRotationMatrix( m1 );

  	};

  }();

  Camera.prototype.clone = function () {

  	return new this.constructor().copy( this );

  };

  Camera.prototype.copy = function ( source ) {

  	Object3D.prototype.copy.call( this, source );

  	this.matrixWorldInverse.copy( source.matrixWorldInverse );
  	this.projectionMatrix.copy( source.projectionMatrix );

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author greggman / http://games.greggman.com/
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * @author tschw
   */

  function PerspectiveCamera( fov, aspect, near, far ) {

  	Camera.call( this );

  	this.type = 'PerspectiveCamera';

  	this.fov = fov !== undefined ? fov : 50;
  	this.zoom = 1;

  	this.near = near !== undefined ? near : 0.1;
  	this.far = far !== undefined ? far : 2000;
  	this.focus = 10;

  	this.aspect = aspect !== undefined ? aspect : 1;
  	this.view = null;

  	this.filmGauge = 35;	// width of the film (default in millimeters)
  	this.filmOffset = 0;	// horizontal film offset (same unit as gauge)

  	this.updateProjectionMatrix();

  };

  PerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ), {

  	constructor: PerspectiveCamera,

  	isPerspectiveCamera: true,

  	copy: function ( source ) {

  		Camera.prototype.copy.call( this, source );

  		this.fov = source.fov;
  		this.zoom = source.zoom;

  		this.near = source.near;
  		this.far = source.far;
  		this.focus = source.focus;

  		this.aspect = source.aspect;
  		this.view = source.view === null ? null : Object.assign( {}, source.view );

  		this.filmGauge = source.filmGauge;
  		this.filmOffset = source.filmOffset;

  		return this;

  	},

  	/**
  	 * Sets the FOV by focal length in respect to the current .filmGauge.
  	 *
  	 * The default film gauge is 35, so that the focal length can be specified for
  	 * a 35mm (full frame) camera.
  	 *
  	 * Values for focal length and film gauge must have the same unit.
  	 */
  	setFocalLength: function ( focalLength ) {

  		// see http://www.bobatkins.com/photography/technical/field_of_view.html
  		var vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;

  		this.fov = exports.Math.RAD2DEG * 2 * Math.atan( vExtentSlope );
  		this.updateProjectionMatrix();

  	},

  	/**
  	 * Calculates the focal length from the current .fov and .filmGauge.
  	 */
  	getFocalLength: function () {

  		var vExtentSlope = Math.tan( exports.Math.DEG2RAD * 0.5 * this.fov );

  		return 0.5 * this.getFilmHeight() / vExtentSlope;

  	},

  	getEffectiveFOV: function () {

  		return exports.Math.RAD2DEG * 2 * Math.atan(
  				Math.tan( exports.Math.DEG2RAD * 0.5 * this.fov ) / this.zoom );

  	},

  	getFilmWidth: function () {

  		// film not completely covered in portrait format (aspect < 1)
  		return this.filmGauge * Math.min( this.aspect, 1 );

  	},

  	getFilmHeight: function () {

  		// film not completely covered in landscape format (aspect > 1)
  		return this.filmGauge / Math.max( this.aspect, 1 );

  	},

  	/**
  	 * Sets an offset in a larger frustum. This is useful for multi-window or
  	 * multi-monitor/multi-machine setups.
  	 *
  	 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
  	 * the monitors are in grid like this
  	 *
  	 *   +---+---+---+
  	 *   | A | B | C |
  	 *   +---+---+---+
  	 *   | D | E | F |
  	 *   +---+---+---+
  	 *
  	 * then for each monitor you would call it like this
  	 *
  	 *   var w = 1920;
  	 *   var h = 1080;
  	 *   var fullWidth = w * 3;
  	 *   var fullHeight = h * 2;
  	 *
  	 *   --A--
  	 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
  	 *   --B--
  	 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
  	 *   --C--
  	 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
  	 *   --D--
  	 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
  	 *   --E--
  	 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
  	 *   --F--
  	 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
  	 *
  	 *   Note there is no reason monitors have to be the same size or in a grid.
  	 */
  	setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {

  		this.aspect = fullWidth / fullHeight;

  		this.view = {
  			fullWidth: fullWidth,
  			fullHeight: fullHeight,
  			offsetX: x,
  			offsetY: y,
  			width: width,
  			height: height
  		};

  		this.updateProjectionMatrix();

  	},

  	clearViewOffset: function() {

  		this.view = null;
  		this.updateProjectionMatrix();

  	},

  	updateProjectionMatrix: function () {

  		var near = this.near,
  			top = near * Math.tan(
  					exports.Math.DEG2RAD * 0.5 * this.fov ) / this.zoom,
  			height = 2 * top,
  			width = this.aspect * height,
  			left = - 0.5 * width,
  			view = this.view;

  		if ( view !== null ) {

  			var fullWidth = view.fullWidth,
  				fullHeight = view.fullHeight;

  			left += view.offsetX * width / fullWidth;
  			top -= view.offsetY * height / fullHeight;
  			width *= view.width / fullWidth;
  			height *= view.height / fullHeight;

  		}

  		var skew = this.filmOffset;
  		if ( skew !== 0 ) left += near * skew / this.getFilmWidth();

  		this.projectionMatrix.makeFrustum(
  				left, left + width, top - height, top, near, this.far );

  	},

  	toJSON: function ( meta ) {

  		var data = Object3D.prototype.toJSON.call( this, meta );

  		data.object.fov = this.fov;
  		data.object.zoom = this.zoom;

  		data.object.near = this.near;
  		data.object.far = this.far;
  		data.object.focus = this.focus;

  		data.object.aspect = this.aspect;

  		if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );

  		data.object.filmGauge = this.filmGauge;
  		data.object.filmOffset = this.filmOffset;

  		return data;

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author arose / http://github.com/arose
   */

  function OrthographicCamera( left, right, top, bottom, near, far ) {

  	Camera.call( this );

  	this.type = 'OrthographicCamera';

  	this.zoom = 1;
  	this.view = null;

  	this.left = left;
  	this.right = right;
  	this.top = top;
  	this.bottom = bottom;

  	this.near = ( near !== undefined ) ? near : 0.1;
  	this.far = ( far !== undefined ) ? far : 2000;

  	this.updateProjectionMatrix();

  };

  OrthographicCamera.prototype = Object.assign( Object.create( Camera.prototype ), {

  	constructor: OrthographicCamera,

  	isOrthographicCamera: true,

  	copy: function ( source ) {

  		Camera.prototype.copy.call( this, source );

  		this.left = source.left;
  		this.right = source.right;
  		this.top = source.top;
  		this.bottom = source.bottom;
  		this.near = source.near;
  		this.far = source.far;

  		this.zoom = source.zoom;
  		this.view = source.view === null ? null : Object.assign( {}, source.view );

  		return this;

  	},

  	setViewOffset: function( fullWidth, fullHeight, x, y, width, height ) {

  		this.view = {
  			fullWidth: fullWidth,
  			fullHeight: fullHeight,
  			offsetX: x,
  			offsetY: y,
  			width: width,
  			height: height
  		};

  		this.updateProjectionMatrix();

  	},

  	clearViewOffset: function() {

  		this.view = null;
  		this.updateProjectionMatrix();

  	},

  	updateProjectionMatrix: function () {

  		var dx = ( this.right - this.left ) / ( 2 * this.zoom );
  		var dy = ( this.top - this.bottom ) / ( 2 * this.zoom );
  		var cx = ( this.right + this.left ) / 2;
  		var cy = ( this.top + this.bottom ) / 2;

  		var left = cx - dx;
  		var right = cx + dx;
  		var top = cy + dy;
  		var bottom = cy - dy;

  		if ( this.view !== null ) {

  			var zoomW = this.zoom / ( this.view.width / this.view.fullWidth );
  			var zoomH = this.zoom / ( this.view.height / this.view.fullHeight );
  			var scaleW = ( this.right - this.left ) / this.view.width;
  			var scaleH = ( this.top - this.bottom ) / this.view.height;

  			left += scaleW * ( this.view.offsetX / zoomW );
  			right = left + scaleW * ( this.view.width / zoomW );
  			top -= scaleH * ( this.view.offsetY / zoomH );
  			bottom = top - scaleH * ( this.view.height / zoomH );

  		}

  		this.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far );

  	},

  	toJSON: function ( meta ) {

  		var data = Object3D.prototype.toJSON.call( this, meta );

  		data.object.zoom = this.zoom;
  		data.object.left = this.left;
  		data.object.right = this.right;
  		data.object.top = this.top;
  		data.object.bottom = this.bottom;
  		data.object.near = this.near;
  		data.object.far = this.far;

  		if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );

  		return data;

  	}

  } );

  /**
   * @author supereggbert / http://www.paulbrunt.co.uk/
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   * @author szimek / https://github.com/szimek/
   * @author tschw
   */

  function WebGLRenderer( parameters ) {

  	console.log( 'THREE.WebGLRenderer', "80dev" );

  	parameters = parameters || {};

  	var _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' ),
  	_context = parameters.context !== undefined ? parameters.context : null,

  	_alpha = parameters.alpha !== undefined ? parameters.alpha : false,
  	_depth = parameters.depth !== undefined ? parameters.depth : true,
  	_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
  	_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
  	_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
  	_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false;

  	var lights = [];

  	var opaqueObjects = [];
  	var opaqueObjectsLastIndex = - 1;
  	var transparentObjects = [];
  	var transparentObjectsLastIndex = - 1;

  	var morphInfluences = new Float32Array( 8 );

  	var sprites = [];
  	var lensFlares = [];

  	// public properties

  	this.domElement = _canvas;
  	this.context = null;

  	// clearing

  	this.autoClear = true;
  	this.autoClearColor = true;
  	this.autoClearDepth = true;
  	this.autoClearStencil = true;

  	// scene graph

  	this.sortObjects = true;

  	// user-defined clipping

  	this.clippingPlanes = [];
  	this.localClippingEnabled = false;

  	// physically based shading

  	this.gammaFactor = 2.0;	// for backwards compatibility
  	this.gammaInput = false;
  	this.gammaOutput = false;

  	// physical lights

  	this.physicallyCorrectLights = false;

  	// tone mapping

  	this.toneMapping = LinearToneMapping;
  	this.toneMappingExposure = 1.0;
  	this.toneMappingWhitePoint = 1.0;

  	// morphs

  	this.maxMorphTargets = 8;
  	this.maxMorphNormals = 4;

  	// internal properties

  	var _this = this,

  	// internal state cache

  	_currentProgram = null,
  	_currentRenderTarget = null,
  	_currentFramebuffer = null,
  	_currentMaterialId = - 1,
  	_currentGeometryProgram = '',
  	_currentCamera = null,

  	_currentScissor = new Vector4(),
  	_currentScissorTest = null,

  	_currentViewport = new Vector4(),

  	//

  	_usedTextureUnits = 0,

  	//

  	_clearColor = new Color( 0x000000 ),
  	_clearAlpha = 0,

  	_width = _canvas.width,
  	_height = _canvas.height,

  	_pixelRatio = 1,

  	_scissor = new Vector4( 0, 0, _width, _height ),
  	_scissorTest = false,

  	_viewport = new Vector4( 0, 0, _width, _height ),

  	// frustum

  	_frustum = new Frustum(),

  	// clipping

  	_clipping = new WebGLClipping(),
  	_clippingEnabled = false,
  	_localClippingEnabled = false,

  	_sphere = new Sphere(),

  	// camera matrices cache

  	_projScreenMatrix = new Matrix4(),

  	_vector3 = new Vector3(),

  	// light arrays cache

  	_lights = {

  		hash: '',

  		ambient: [ 0, 0, 0 ],
  		directional: [],
  		directionalShadowMap: [],
  		directionalShadowMatrix: [],
  		spot: [],
  		spotShadowMap: [],
  		spotShadowMatrix: [],
  		point: [],
  		pointShadowMap: [],
  		pointShadowMatrix: [],
  		hemi: [],

  		shadows: []

  	},

  	// info

  	_infoRender = {

  		calls: 0,
  		vertices: 0,
  		faces: 0,
  		points: 0

  	};

  	this.info = {

  		render: _infoRender,
  		memory: {

  			geometries: 0,
  			textures: 0

  		},
  		programs: null

  	};


  	// initialize

  	var _gl;

  	try {

  		var attributes = {
  			alpha: _alpha,
  			depth: _depth,
  			stencil: _stencil,
  			antialias: _antialias,
  			premultipliedAlpha: _premultipliedAlpha,
  			preserveDrawingBuffer: _preserveDrawingBuffer
  		};

  		_gl = _context || _canvas.getContext( 'webgl', attributes ) || _canvas.getContext( 'experimental-webgl', attributes );

  		if ( _gl === null ) {

  			if ( _canvas.getContext( 'webgl' ) !== null ) {

  				throw 'Error creating WebGL context with your selected attributes.';

  			} else {

  				throw 'Error creating WebGL context.';

  			}

  		}

  		// Some experimental-webgl implementations do not have getShaderPrecisionFormat

  		if ( _gl.getShaderPrecisionFormat === undefined ) {

  			_gl.getShaderPrecisionFormat = function () {

  				return { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };

  			};

  		}

  		_canvas.addEventListener( 'webglcontextlost', onContextLost, false );

  	} catch ( error ) {

  		console.error( 'THREE.WebGLRenderer: ' + error );

  	}

  	var extensions = new WebGLExtensions( _gl );

  	extensions.get( 'WEBGL_depth_texture' );
  	extensions.get( 'OES_texture_float' );
  	extensions.get( 'OES_texture_float_linear' );
  	extensions.get( 'OES_texture_half_float' );
  	extensions.get( 'OES_texture_half_float_linear' );
  	extensions.get( 'OES_standard_derivatives' );
  	extensions.get( 'ANGLE_instanced_arrays' );

  	if ( extensions.get( 'OES_element_index_uint' ) ) {

  		BufferGeometry.MaxIndex = 4294967296;

  	}

  	var capabilities = new WebGLCapabilities( _gl, extensions, parameters );

  	var state = new WebGLState( _gl, extensions, paramThreeToGL );
  	var properties = new WebGLProperties();
  	var textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, paramThreeToGL, this.info );
  	var objects = new WebGLObjects( _gl, properties, this.info );
  	var programCache = new WebGLPrograms( this, capabilities );
  	var lightCache = new WebGLLights();

  	this.info.programs = programCache.programs;

  	var bufferRenderer = new WebGLBufferRenderer( _gl, extensions, _infoRender );
  	var indexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, _infoRender );

  	//

  	var backgroundCamera = new OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
  	var backgroundCamera2 = new PerspectiveCamera();
  	var backgroundPlaneMesh = new Mesh(
  		new PlaneBufferGeometry( 2, 2 ),
  		new MeshBasicMaterial( { depthTest: false, depthWrite: false, fog: false } )
  	);
  	var backgroundBoxShader = exports.ShaderLib[ 'cube' ];
  	var backgroundBoxMesh = new Mesh(
  		new BoxBufferGeometry( 5, 5, 5 ),
  		new ShaderMaterial( {
  			uniforms: backgroundBoxShader.uniforms,
  			vertexShader: backgroundBoxShader.vertexShader,
  			fragmentShader: backgroundBoxShader.fragmentShader,
  			side: BackSide,
  			depthTest: false,
  			depthWrite: false,
  			fog: false
  		} )
  	);

  	//

  	function getTargetPixelRatio() {

  		return _currentRenderTarget === null ? _pixelRatio : 1;

  	}

  	function glClearColor( r, g, b, a ) {

  		if ( _premultipliedAlpha === true ) {

  			r *= a; g *= a; b *= a;

  		}

  		state.clearColor( r, g, b, a );

  	}

  	function setDefaultGLState() {

  		state.init();

  		state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );
  		state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );

  		glClearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

  	}

  	function resetGLState() {

  		_currentProgram = null;
  		_currentCamera = null;

  		_currentGeometryProgram = '';
  		_currentMaterialId = - 1;

  		state.reset();

  	}

  	setDefaultGLState();

  	this.context = _gl;
  	this.capabilities = capabilities;
  	this.extensions = extensions;
  	this.properties = properties;
  	this.state = state;

  	// shadow map

  	var shadowMap = new WebGLShadowMap( this, _lights, objects, capabilities );

  	this.shadowMap = shadowMap;


  	// Plugins

  	var spritePlugin = new SpritePlugin( this, sprites );
  	var lensFlarePlugin = new LensFlarePlugin( this, lensFlares );

  	// API

  	this.getContext = function () {

  		return _gl;

  	};

  	this.getContextAttributes = function () {

  		return _gl.getContextAttributes();

  	};

  	this.forceContextLoss = function () {

  		extensions.get( 'WEBGL_lose_context' ).loseContext();

  	};

  	this.getMaxAnisotropy = function () {

  		return capabilities.getMaxAnisotropy();

  	};

  	this.getPrecision = function () {

  		return capabilities.precision;

  	};

  	this.getPixelRatio = function () {

  		return _pixelRatio;

  	};

  	this.setPixelRatio = function ( value ) {

  		if ( value === undefined ) return;

  		_pixelRatio = value;

  		this.setSize( _viewport.z, _viewport.w, false );

  	};

  	this.getSize = function () {

  		return {
  			width: _width,
  			height: _height
  		};

  	};

  	this.setSize = function ( width, height, updateStyle ) {

  		_width = width;
  		_height = height;

  		_canvas.width = width * _pixelRatio;
  		_canvas.height = height * _pixelRatio;

  		if ( updateStyle !== false ) {

  			_canvas.style.width = width + 'px';
  			_canvas.style.height = height + 'px';

  		}

  		this.setViewport( 0, 0, width, height );

  	};

  	this.setViewport = function ( x, y, width, height ) {

  		state.viewport( _viewport.set( x, y, width, height ) );

  	};

  	this.setScissor = function ( x, y, width, height ) {

  		state.scissor( _scissor.set( x, y, width, height ) );

  	};

  	this.setScissorTest = function ( boolean ) {

  		state.setScissorTest( _scissorTest = boolean );

  	};

  	// Clearing

  	this.getClearColor = function () {

  		return _clearColor;

  	};

  	this.setClearColor = function ( color, alpha ) {

  		_clearColor.set( color );

  		_clearAlpha = alpha !== undefined ? alpha : 1;

  		glClearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

  	};

  	this.getClearAlpha = function () {

  		return _clearAlpha;

  	};

  	this.setClearAlpha = function ( alpha ) {

  		_clearAlpha = alpha;

  		glClearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

  	};

  	this.clear = function ( color, depth, stencil ) {

  		var bits = 0;

  		if ( color === undefined || color ) bits |= _gl.COLOR_BUFFER_BIT;
  		if ( depth === undefined || depth ) bits |= _gl.DEPTH_BUFFER_BIT;
  		if ( stencil === undefined || stencil ) bits |= _gl.STENCIL_BUFFER_BIT;

  		_gl.clear( bits );

  	};

  	this.clearColor = function () {

  		this.clear( true, false, false );

  	};

  	this.clearDepth = function () {

  		this.clear( false, true, false );

  	};

  	this.clearStencil = function () {

  		this.clear( false, false, true );

  	};

  	this.clearTarget = function ( renderTarget, color, depth, stencil ) {

  		this.setRenderTarget( renderTarget );
  		this.clear( color, depth, stencil );

  	};

  	// Reset

  	this.resetGLState = resetGLState;

  	this.dispose = function() {

  		transparentObjects = [];
  		transparentObjectsLastIndex = -1;
  		opaqueObjects = [];
  		opaqueObjectsLastIndex = -1;

  		_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );

  	};

  	// Events

  	function onContextLost( event ) {

  		event.preventDefault();

  		resetGLState();
  		setDefaultGLState();

  		properties.clear();

  	}

  	function onMaterialDispose( event ) {

  		var material = event.target;

  		material.removeEventListener( 'dispose', onMaterialDispose );

  		deallocateMaterial( material );

  	}

  	// Buffer deallocation

  	function deallocateMaterial( material ) {

  		releaseMaterialProgramReference( material );

  		properties.delete( material );

  	}


  	function releaseMaterialProgramReference( material ) {

  		var programInfo = properties.get( material ).program;

  		material.program = undefined;

  		if ( programInfo !== undefined ) {

  			programCache.releaseProgram( programInfo );

  		}

  	}

  	// Buffer rendering

  	this.renderBufferImmediate = function ( object, program, material ) {

  		state.initAttributes();

  		var buffers = properties.get( object );

  		if ( object.hasPositions && ! buffers.position ) buffers.position = _gl.createBuffer();
  		if ( object.hasNormals && ! buffers.normal ) buffers.normal = _gl.createBuffer();
  		if ( object.hasUvs && ! buffers.uv ) buffers.uv = _gl.createBuffer();
  		if ( object.hasColors && ! buffers.color ) buffers.color = _gl.createBuffer();

  		var attributes = program.getAttributes();

  		if ( object.hasPositions ) {

  			_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.position );
  			_gl.bufferData( _gl.ARRAY_BUFFER, object.positionArray, _gl.DYNAMIC_DRAW );

  			state.enableAttribute( attributes.position );
  			_gl.vertexAttribPointer( attributes.position, 3, _gl.FLOAT, false, 0, 0 );

  		}

  		if ( object.hasNormals ) {

  			_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.normal );

  			if ( material.type !== 'MeshPhongMaterial' && material.type !== 'MeshStandardMaterial' && material.type !== 'MeshPhysicalMaterial' && material.shading === FlatShading ) {

  				for ( var i = 0, l = object.count * 3; i < l; i += 9 ) {

  					var array = object.normalArray;

  					var nx = ( array[ i + 0 ] + array[ i + 3 ] + array[ i + 6 ] ) / 3;
  					var ny = ( array[ i + 1 ] + array[ i + 4 ] + array[ i + 7 ] ) / 3;
  					var nz = ( array[ i + 2 ] + array[ i + 5 ] + array[ i + 8 ] ) / 3;

  					array[ i + 0 ] = nx;
  					array[ i + 1 ] = ny;
  					array[ i + 2 ] = nz;

  					array[ i + 3 ] = nx;
  					array[ i + 4 ] = ny;
  					array[ i + 5 ] = nz;

  					array[ i + 6 ] = nx;
  					array[ i + 7 ] = ny;
  					array[ i + 8 ] = nz;

  				}

  			}

  			_gl.bufferData( _gl.ARRAY_BUFFER, object.normalArray, _gl.DYNAMIC_DRAW );

  			state.enableAttribute( attributes.normal );

  			_gl.vertexAttribPointer( attributes.normal, 3, _gl.FLOAT, false, 0, 0 );

  		}

  		if ( object.hasUvs && material.map ) {

  			_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.uv );
  			_gl.bufferData( _gl.ARRAY_BUFFER, object.uvArray, _gl.DYNAMIC_DRAW );

  			state.enableAttribute( attributes.uv );

  			_gl.vertexAttribPointer( attributes.uv, 2, _gl.FLOAT, false, 0, 0 );

  		}

  		if ( object.hasColors && material.vertexColors !== NoColors ) {

  			_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.color );
  			_gl.bufferData( _gl.ARRAY_BUFFER, object.colorArray, _gl.DYNAMIC_DRAW );

  			state.enableAttribute( attributes.color );

  			_gl.vertexAttribPointer( attributes.color, 3, _gl.FLOAT, false, 0, 0 );

  		}

  		state.disableUnusedAttributes();

  		_gl.drawArrays( _gl.TRIANGLES, 0, object.count );

  		object.count = 0;

  	};

  	this.renderBufferDirect = function ( camera, fog, geometry, material, object, group ) {

  		setMaterial( material );

  		var program = setProgram( camera, fog, material, object );

  		var updateBuffers = false;
  		var geometryProgram = geometry.id + '_' + program.id + '_' + material.wireframe;

  		if ( geometryProgram !== _currentGeometryProgram ) {

  			_currentGeometryProgram = geometryProgram;
  			updateBuffers = true;

  		}

  		// morph targets

  		var morphTargetInfluences = object.morphTargetInfluences;

  		if ( morphTargetInfluences !== undefined ) {

  			var activeInfluences = [];

  			for ( var i = 0, l = morphTargetInfluences.length; i < l; i ++ ) {

  				var influence = morphTargetInfluences[ i ];
  				activeInfluences.push( [ influence, i ] );

  			}

  			activeInfluences.sort( absNumericalSort );

  			if ( activeInfluences.length > 8 ) {

  				activeInfluences.length = 8;

  			}

  			var morphAttributes = geometry.morphAttributes;

  			for ( var i = 0, l = activeInfluences.length; i < l; i ++ ) {

  				var influence = activeInfluences[ i ];
  				morphInfluences[ i ] = influence[ 0 ];

  				if ( influence[ 0 ] !== 0 ) {

  					var index = influence[ 1 ];

  					if ( material.morphTargets === true && morphAttributes.position ) geometry.addAttribute( 'morphTarget' + i, morphAttributes.position[ index ] );
  					if ( material.morphNormals === true && morphAttributes.normal ) geometry.addAttribute( 'morphNormal' + i, morphAttributes.normal[ index ] );

  				} else {

  					if ( material.morphTargets === true ) geometry.removeAttribute( 'morphTarget' + i );
  					if ( material.morphNormals === true ) geometry.removeAttribute( 'morphNormal' + i );

  				}

  			}

  			program.getUniforms().setValue(
  					_gl, 'morphTargetInfluences', morphInfluences );

  			updateBuffers = true;

  		}

  		//

  		var index = geometry.index;
  		var position = geometry.attributes.position;

  		if ( material.wireframe === true ) {

  			index = objects.getWireframeAttribute( geometry );

  		}

  		var renderer;

  		if ( index !== null ) {

  			renderer = indexedBufferRenderer;
  			renderer.setIndex( index );

  		} else {

  			renderer = bufferRenderer;

  		}

  		if ( updateBuffers ) {

  			setupVertexAttributes( material, program, geometry );

  			if ( index !== null ) {

  				_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, objects.getAttributeBuffer( index ) );

  			}

  		}

  		//

  		var dataStart = 0;
  		var dataCount = Infinity;

  		if ( index !== null ) {

  			dataCount = index.count;

  		} else if ( position !== undefined ) {

  			dataCount = position.count;

  		}

  		var rangeStart = geometry.drawRange.start;
  		var rangeCount = geometry.drawRange.count;

  		var groupStart = group !== null ? group.start : 0;
  		var groupCount = group !== null ? group.count : Infinity;

  		var drawStart = Math.max( dataStart, rangeStart, groupStart );
  		var drawEnd = Math.min( dataStart + dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;

  		var drawCount = Math.max( 0, drawEnd - drawStart + 1 );

  		//

  		if ( object && object.isMesh ) {

  			if ( material.wireframe === true ) {

  				state.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );
  				renderer.setMode( _gl.LINES );

  			} else {

  				switch ( object.drawMode ) {

  					case TrianglesDrawMode:
  						renderer.setMode( _gl.TRIANGLES );
  						break;

  					case TriangleStripDrawMode:
  						renderer.setMode( _gl.TRIANGLE_STRIP );
  						break;

  					case TriangleFanDrawMode:
  						renderer.setMode( _gl.TRIANGLE_FAN );
  						break;

  				}

  			}


  		} else if ( object && object.isLine ) {

  			var lineWidth = material.linewidth;

  			if ( lineWidth === undefined ) lineWidth = 1; // Not using Line*Material

  			state.setLineWidth( lineWidth * getTargetPixelRatio() );

  			if ( object && object.isLineSegments ) {

  				renderer.setMode( _gl.LINES );

  			} else {

  				renderer.setMode( _gl.LINE_STRIP );

  			}

  		} else if ( object && object.isPoints ) {

  			renderer.setMode( _gl.POINTS );

  		}

  		if ( geometry && geometry.isInstancedBufferGeometry ) {

  			if ( geometry.maxInstancedCount > 0 ) {

  				renderer.renderInstances( geometry, drawStart, drawCount );

  			}

  		} else {

  			renderer.render( drawStart, drawCount );

  		}

  	};

  	function setupVertexAttributes( material, program, geometry, startIndex ) {

  		var extension;

  		if ( geometry && geometry.isInstancedBufferGeometry ) {

  			extension = extensions.get( 'ANGLE_instanced_arrays' );

  			if ( extension === null ) {

  				console.error( 'THREE.WebGLRenderer.setupVertexAttributes: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
  				return;

  			}

  		}

  		if ( startIndex === undefined ) startIndex = 0;

  		state.initAttributes();

  		var geometryAttributes = geometry.attributes;

  		var programAttributes = program.getAttributes();

  		var materialDefaultAttributeValues = material.defaultAttributeValues;

  		for ( var name in programAttributes ) {

  			var programAttribute = programAttributes[ name ];

  			if ( programAttribute >= 0 ) {

  				var geometryAttribute = geometryAttributes[ name ];

  				if ( geometryAttribute !== undefined ) {

  					var type = _gl.FLOAT;
  					var array = geometryAttribute.array;
  					var normalized = geometryAttribute.normalized;

  					if ( array instanceof Float32Array ) {

  						type = _gl.FLOAT;

  					} else if ( array instanceof Float64Array ) {

  						console.warn( "Unsupported data buffer format: Float64Array" );

  					} else if ( array instanceof Uint16Array ) {

  						type = _gl.UNSIGNED_SHORT;

  					} else if ( array instanceof Int16Array ) {

  						type = _gl.SHORT;

  					} else if ( array instanceof Uint32Array ) {

  						type = _gl.UNSIGNED_INT;

  					} else if ( array instanceof Int32Array ) {

  						type = _gl.INT;

  					} else if ( array instanceof Int8Array ) {

  						type = _gl.BYTE;

  					} else if ( array instanceof Uint8Array ) {

  						type = _gl.UNSIGNED_BYTE;

  					}

  					var size = geometryAttribute.itemSize;
  					var buffer = objects.getAttributeBuffer( geometryAttribute );

  					if ( geometryAttribute && geometryAttribute.isInterleavedBufferAttribute ) {

  						var data = geometryAttribute.data;
  						var stride = data.stride;
  						var offset = geometryAttribute.offset;

  						if ( data && data.isInstancedInterleavedBuffer ) {

  							state.enableAttributeAndDivisor( programAttribute, data.meshPerAttribute, extension );

  							if ( geometry.maxInstancedCount === undefined ) {

  								geometry.maxInstancedCount = data.meshPerAttribute * data.count;

  							}

  						} else {

  							state.enableAttribute( programAttribute );

  						}

  						_gl.bindBuffer( _gl.ARRAY_BUFFER, buffer );
  						_gl.vertexAttribPointer( programAttribute, size, type, normalized, stride * data.array.BYTES_PER_ELEMENT, ( startIndex * stride + offset ) * data.array.BYTES_PER_ELEMENT );

  					} else {

  						if ( geometryAttribute && geometryAttribute.isInstancedBufferAttribute ) {

  							state.enableAttributeAndDivisor( programAttribute, geometryAttribute.meshPerAttribute, extension );

  							if ( geometry.maxInstancedCount === undefined ) {

  								geometry.maxInstancedCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;

  							}

  						} else {

  							state.enableAttribute( programAttribute );

  						}

  						_gl.bindBuffer( _gl.ARRAY_BUFFER, buffer );
  						_gl.vertexAttribPointer( programAttribute, size, type, normalized, 0, startIndex * size * geometryAttribute.array.BYTES_PER_ELEMENT );

  					}

  				} else if ( materialDefaultAttributeValues !== undefined ) {

  					var value = materialDefaultAttributeValues[ name ];

  					if ( value !== undefined ) {

  						switch ( value.length ) {

  							case 2:
  								_gl.vertexAttrib2fv( programAttribute, value );
  								break;

  							case 3:
  								_gl.vertexAttrib3fv( programAttribute, value );
  								break;

  							case 4:
  								_gl.vertexAttrib4fv( programAttribute, value );
  								break;

  							default:
  								_gl.vertexAttrib1fv( programAttribute, value );

  						}

  					}

  				}

  			}

  		}

  		state.disableUnusedAttributes();

  	}

  	// Sorting

  	function absNumericalSort( a, b ) {

  		return Math.abs( b[ 0 ] ) - Math.abs( a[ 0 ] );

  	}

  	function painterSortStable( a, b ) {

  		if ( a.object.renderOrder !== b.object.renderOrder ) {

  			return a.object.renderOrder - b.object.renderOrder;

  		} else if ( a.material.program && b.material.program && a.material.program !== b.material.program ) {

  			return a.material.program.id - b.material.program.id;

  		} else if ( a.material.id !== b.material.id ) {

  			return a.material.id - b.material.id;

  		} else if ( a.z !== b.z ) {

  			return a.z - b.z;

  		} else {

  			return a.id - b.id;

  		}

  	}

  	function reversePainterSortStable( a, b ) {

  		if ( a.object.renderOrder !== b.object.renderOrder ) {

  			return a.object.renderOrder - b.object.renderOrder;

  		} if ( a.z !== b.z ) {

  			return b.z - a.z;

  		} else {

  			return a.id - b.id;

  		}

  	}

  	// Rendering

  	this.render = function ( scene, camera, renderTarget, forceClear ) {

  		if ( ( camera && camera.isCamera ) === false ) {

  			console.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );
  			return;

  		}

  		var fog = scene.fog;

  		// reset caching for this frame

  		_currentGeometryProgram = '';
  		_currentMaterialId = - 1;
  		_currentCamera = null;

  		// update scene graph

  		if ( scene.autoUpdate === true ) scene.updateMatrixWorld();

  		// update camera matrices and frustum

  		if ( camera.parent === null ) camera.updateMatrixWorld();

  		camera.matrixWorldInverse.getInverse( camera.matrixWorld );

  		_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
  		_frustum.setFromMatrix( _projScreenMatrix );

  		lights.length = 0;

  		opaqueObjectsLastIndex = - 1;
  		transparentObjectsLastIndex = - 1;

  		sprites.length = 0;
  		lensFlares.length = 0;

  		_localClippingEnabled = this.localClippingEnabled;
  		_clippingEnabled = _clipping.init( this.clippingPlanes, _localClippingEnabled, camera );

  		projectObject( scene, camera );

  		opaqueObjects.length = opaqueObjectsLastIndex + 1;
  		transparentObjects.length = transparentObjectsLastIndex + 1;

  		if ( _this.sortObjects === true ) {

  			opaqueObjects.sort( painterSortStable );
  			transparentObjects.sort( reversePainterSortStable );

  		}

  		//

  		if ( _clippingEnabled ) _clipping.beginShadows();

  		setupShadows( lights );

  		shadowMap.render( scene, camera );

  		setupLights( lights, camera );

  		if ( _clippingEnabled ) _clipping.endShadows();

  		//

  		_infoRender.calls = 0;
  		_infoRender.vertices = 0;
  		_infoRender.faces = 0;
  		_infoRender.points = 0;

  		if ( renderTarget === undefined ) {

  			renderTarget = null;

  		}

  		this.setRenderTarget( renderTarget );

  		//

  		var background = scene.background;

  		if ( background === null ) {

  			glClearColor( _clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha );

  		} else if ( background && background.isColor ) {

  			glClearColor( background.r, background.g, background.b, 1 );

  		}

  		if ( this.autoClear || forceClear ) {

  			this.clear( this.autoClearColor, this.autoClearDepth, this.autoClearStencil );

  		}

  		if ( background && background.isCubeTexture ) {

  			backgroundCamera2.projectionMatrix.copy( camera.projectionMatrix );

  			backgroundCamera2.matrixWorld.extractRotation( camera.matrixWorld );
  			backgroundCamera2.matrixWorldInverse.getInverse( backgroundCamera2.matrixWorld );

  			backgroundBoxMesh.material.uniforms[ "tCube" ].value = background;
  			backgroundBoxMesh.modelViewMatrix.multiplyMatrices( backgroundCamera2.matrixWorldInverse, backgroundBoxMesh.matrixWorld );

  			objects.update( backgroundBoxMesh );

  			_this.renderBufferDirect( backgroundCamera2, null, backgroundBoxMesh.geometry, backgroundBoxMesh.material, backgroundBoxMesh, null );

  		} else if ( background && background.isTexture ) {

  			backgroundPlaneMesh.material.map = background;

  			objects.update( backgroundPlaneMesh );

  			_this.renderBufferDirect( backgroundCamera, null, backgroundPlaneMesh.geometry, backgroundPlaneMesh.material, backgroundPlaneMesh, null );

  		}

  		//

  		if ( scene.overrideMaterial ) {

  			var overrideMaterial = scene.overrideMaterial;

  			renderObjects( opaqueObjects, camera, fog, overrideMaterial );
  			renderObjects( transparentObjects, camera, fog, overrideMaterial );

  		} else {

  			// opaque pass (front-to-back order)

  			state.setBlending( NoBlending );
  			renderObjects( opaqueObjects, camera, fog );

  			// transparent pass (back-to-front order)

  			renderObjects( transparentObjects, camera, fog );

  		}

  		// custom render plugins (post pass)

  		spritePlugin.render( scene, camera );
  		lensFlarePlugin.render( scene, camera, _currentViewport );

  		// Generate mipmap if we're using any kind of mipmap filtering

  		if ( renderTarget ) {

  			textures.updateRenderTargetMipmap( renderTarget );

  		}

  		// Ensure depth buffer writing is enabled so it can be cleared on next render

  		state.setDepthTest( true );
  		state.setDepthWrite( true );
  		state.setColorWrite( true );

  		// _gl.finish();

  	};

  	function pushRenderItem( object, geometry, material, z, group ) {

  		var array, index;

  		// allocate the next position in the appropriate array

  		if ( material.transparent ) {

  			array = transparentObjects;
  			index = ++ transparentObjectsLastIndex;

  		} else {

  			array = opaqueObjects;
  			index = ++ opaqueObjectsLastIndex;

  		}

  		// recycle existing render item or grow the array

  		var renderItem = array[ index ];

  		if ( renderItem !== undefined ) {

  			renderItem.id = object.id;
  			renderItem.object = object;
  			renderItem.geometry = geometry;
  			renderItem.material = material;
  			renderItem.z = _vector3.z;
  			renderItem.group = group;

  		} else {

  			renderItem = {
  				id: object.id,
  				object: object,
  				geometry: geometry,
  				material: material,
  				z: _vector3.z,
  				group: group
  			};

  			// assert( index === array.length );
  			array.push( renderItem );

  		}

  	}

  	// TODO Duplicated code (Frustum)

  	function isObjectViewable( object ) {

  		var geometry = object.geometry;

  		if ( geometry.boundingSphere === null )
  			geometry.computeBoundingSphere();

  		_sphere.copy( geometry.boundingSphere ).
  			applyMatrix4( object.matrixWorld );

  		return isSphereViewable( _sphere );

  	}

  	function isSpriteViewable( sprite ) {

  		_sphere.center.set( 0, 0, 0 );
  		_sphere.radius = 0.7071067811865476;
  		_sphere.applyMatrix4( sprite.matrixWorld );

  		return isSphereViewable( _sphere );

  	}

  	function isSphereViewable( sphere ) {

  		if ( ! _frustum.intersectsSphere( sphere ) ) return false;

  		var numPlanes = _clipping.numPlanes;

  		if ( numPlanes === 0 ) return true;

  		var planes = _this.clippingPlanes,

  			center = sphere.center,
  			negRad = - sphere.radius,
  			i = 0;

  		do {

  			// out when deeper than radius in the negative halfspace
  			if ( planes[ i ].distanceToPoint( center ) < negRad ) return false;

  		} while ( ++ i !== numPlanes );

  		return true;

  	}

  	function projectObject( object, camera ) {

  		if ( object.visible === false ) return;

  		if ( object.layers.test( camera.layers ) ) {

  			if ( object && object.isLight ) {

  				lights.push( object );

  			} else if ( object && object.isSprite ) {

  				if ( object.frustumCulled === false || isSpriteViewable( object ) === true ) {

  					sprites.push( object );

  				}

  			} else if ( object && object.isLensFlare ) {

  				lensFlares.push( object );

  			} else if ( object && object.isImmediateRenderObject ) {

  				if ( _this.sortObjects === true ) {

  					_vector3.setFromMatrixPosition( object.matrixWorld );
  					_vector3.applyProjection( _projScreenMatrix );

  				}

  				pushRenderItem( object, null, object.material, _vector3.z, null );

  			} else if ( ( object && object.isMesh ) || ( object && object.isLine ) || ( object && object.isPoints ) ) {

  				if ( object && object.isSkinnedMesh ) {

  					object.skeleton.update();

  				}

  				if ( object.frustumCulled === false || isObjectViewable( object ) === true ) {

  					var material = object.material;

  					if ( material.visible === true ) {

  						if ( _this.sortObjects === true ) {

  							_vector3.setFromMatrixPosition( object.matrixWorld );
  							_vector3.applyProjection( _projScreenMatrix );

  						}

  						var geometry = objects.update( object );

  						if ( material && material.isMultiMaterial ) {

  							var groups = geometry.groups;
  							var materials = material.materials;

  							for ( var i = 0, l = groups.length; i < l; i ++ ) {

  								var group = groups[ i ];
  								var groupMaterial = materials[ group.materialIndex ];

  								if ( groupMaterial.visible === true ) {

  									pushRenderItem( object, geometry, groupMaterial, _vector3.z, group );

  								}

  							}

  						} else {

  							pushRenderItem( object, geometry, material, _vector3.z, null );

  						}

  					}

  				}

  			}

  		}

  		var children = object.children;

  		for ( var i = 0, l = children.length; i < l; i ++ ) {

  			projectObject( children[ i ], camera );

  		}

  	}

  	function renderObjects( renderList, camera, fog, overrideMaterial ) {

  		for ( var i = 0, l = renderList.length; i < l; i ++ ) {

  			var renderItem = renderList[ i ];

  			var object = renderItem.object;
  			var geometry = renderItem.geometry;
  			var material = overrideMaterial === undefined ? renderItem.material : overrideMaterial;
  			var group = renderItem.group;

  			object.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, object.matrixWorld );
  			object.normalMatrix.getNormalMatrix( object.modelViewMatrix );

  			if ( object && object.isImmediateRenderObject ) {

  				setMaterial( material );

  				var program = setProgram( camera, fog, material, object );

  				_currentGeometryProgram = '';

  				object.render( function ( object ) {

  					_this.renderBufferImmediate( object, program, material );

  				} );

  			} else {

  				_this.renderBufferDirect( camera, fog, geometry, material, object, group );

  			}

  		}

  	}

  	function initMaterial( material, fog, object ) {

  		var materialProperties = properties.get( material );

  		var parameters = programCache.getParameters(
  				material, _lights, fog, _clipping.numPlanes, object );

  		var code = programCache.getProgramCode( material, parameters );

  		var program = materialProperties.program;
  		var programChange = true;

  		if ( program === undefined ) {

  			// new material
  			material.addEventListener( 'dispose', onMaterialDispose );

  		} else if ( program.code !== code ) {

  			// changed glsl or parameters
  			releaseMaterialProgramReference( material );

  		} else if ( parameters.shaderID !== undefined ) {

  			// same glsl and uniform list
  			return;

  		} else {

  			// only rebuild uniform list
  			programChange = false;

  		}

  		if ( programChange ) {

  			if ( parameters.shaderID ) {

  				var shader = exports.ShaderLib[ parameters.shaderID ];

  				materialProperties.__webglShader = {
  					name: material.type,
  					uniforms: exports.UniformsUtils.clone( shader.uniforms ),
  					vertexShader: shader.vertexShader,
  					fragmentShader: shader.fragmentShader
  				};

  			} else {

  				materialProperties.__webglShader = {
  					name: material.type,
  					uniforms: material.uniforms,
  					vertexShader: material.vertexShader,
  					fragmentShader: material.fragmentShader
  				};

  			}

  			material.__webglShader = materialProperties.__webglShader;

  			program = programCache.acquireProgram( material, parameters, code );

  			materialProperties.program = program;
  			material.program = program;

  		}

  		var attributes = program.getAttributes();

  		if ( material.morphTargets ) {

  			material.numSupportedMorphTargets = 0;

  			for ( var i = 0; i < _this.maxMorphTargets; i ++ ) {

  				if ( attributes[ 'morphTarget' + i ] >= 0 ) {

  					material.numSupportedMorphTargets ++;

  				}

  			}

  		}

  		if ( material.morphNormals ) {

  			material.numSupportedMorphNormals = 0;

  			for ( var i = 0; i < _this.maxMorphNormals; i ++ ) {

  				if ( attributes[ 'morphNormal' + i ] >= 0 ) {

  					material.numSupportedMorphNormals ++;

  				}

  			}

  		}

  		var uniforms = materialProperties.__webglShader.uniforms;

  		if ( ! ( material && material.isShaderMaterial ) &&
  				! ( material && material.isRawShaderMaterial ) ||
  				material.clipping === true ) {

  			materialProperties.numClippingPlanes = _clipping.numPlanes;
  			uniforms.clippingPlanes = _clipping.uniform;

  		}

  		if ( material.lights ) {

  			// store the light setup it was created for

  			materialProperties.lightsHash = _lights.hash;

  			// wire up the material to this renderer's lighting state

  			uniforms.ambientLightColor.value = _lights.ambient;
  			uniforms.directionalLights.value = _lights.directional;
  			uniforms.spotLights.value = _lights.spot;
  			uniforms.pointLights.value = _lights.point;
  			uniforms.hemisphereLights.value = _lights.hemi;

  			uniforms.directionalShadowMap.value = _lights.directionalShadowMap;
  			uniforms.directionalShadowMatrix.value = _lights.directionalShadowMatrix;
  			uniforms.spotShadowMap.value = _lights.spotShadowMap;
  			uniforms.spotShadowMatrix.value = _lights.spotShadowMatrix;
  			uniforms.pointShadowMap.value = _lights.pointShadowMap;
  			uniforms.pointShadowMatrix.value = _lights.pointShadowMatrix;

  		}

  		var progUniforms = materialProperties.program.getUniforms(),
  			uniformsList =
  					exports.WebGLUniforms.seqWithValue( progUniforms.seq, uniforms );

  		materialProperties.uniformsList = uniformsList;
  		materialProperties.dynamicUniforms =
  				exports.WebGLUniforms.splitDynamic( uniformsList, uniforms );

  	}

  	function setMaterial( material ) {

  		if ( material.side !== DoubleSide )
  			state.enable( _gl.CULL_FACE );
  		else
  			state.disable( _gl.CULL_FACE );

  		state.setFlipSided( material.side === BackSide );

  		if ( material.transparent === true ) {

  			state.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );

  		} else {

  			state.setBlending( NoBlending );

  		}

  		state.setDepthFunc( material.depthFunc );
  		state.setDepthTest( material.depthTest );
  		state.setDepthWrite( material.depthWrite );
  		state.setColorWrite( material.colorWrite );
  		state.setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );

  	}

  	function setProgram( camera, fog, material, object ) {

  		_usedTextureUnits = 0;

  		var materialProperties = properties.get( material );

  		if ( _clippingEnabled ) {

  			if ( _localClippingEnabled || camera !== _currentCamera ) {

  				var useCache =
  						camera === _currentCamera &&
  						material.id === _currentMaterialId;

  				// we might want to call this function with some ClippingGroup
  				// object instead of the material, once it becomes feasible
  				// (#8465, #8379)
  				_clipping.setState(
  						material.clippingPlanes, material.clipShadows,
  						camera, materialProperties, useCache );

  			}

  			if ( materialProperties.numClippingPlanes !== undefined &&
  				materialProperties.numClippingPlanes !== _clipping.numPlanes ) {

  				material.needsUpdate = true;

  			}

  		}

  		if ( materialProperties.program === undefined ) {

  			material.needsUpdate = true;

  		}

  		if ( materialProperties.lightsHash !== undefined &&
  			materialProperties.lightsHash !== _lights.hash ) {

  			material.needsUpdate = true;

  		}

  		if ( material.needsUpdate ) {

  			initMaterial( material, fog, object );
  			material.needsUpdate = false;

  		}

  		var refreshProgram = false;
  		var refreshMaterial = false;
  		var refreshLights = false;

  		var program = materialProperties.program,
  			p_uniforms = program.getUniforms(),
  			m_uniforms = materialProperties.__webglShader.uniforms;

  		if ( program.id !== _currentProgram ) {

  			_gl.useProgram( program.program );
  			_currentProgram = program.id;

  			refreshProgram = true;
  			refreshMaterial = true;
  			refreshLights = true;

  		}

  		if ( material.id !== _currentMaterialId ) {

  			_currentMaterialId = material.id;

  			refreshMaterial = true;

  		}

  		if ( refreshProgram || camera !== _currentCamera ) {

  			p_uniforms.set( _gl, camera, 'projectionMatrix' );

  			if ( capabilities.logarithmicDepthBuffer ) {

  				p_uniforms.setValue( _gl, 'logDepthBufFC',
  						2.0 / ( Math.log( camera.far + 1.0 ) / Math.LN2 ) );

  			}


  			if ( camera !== _currentCamera ) {

  				_currentCamera = camera;

  				// lighting uniforms depend on the camera so enforce an update
  				// now, in case this material supports lights - or later, when
  				// the next material that does gets activated:

  				refreshMaterial = true;		// set to true on material change
  				refreshLights = true;		// remains set until update done

  			}

  			// load material specific uniforms
  			// (shader material also gets them for the sake of genericity)

  			if ( ( material && material.isShaderMaterial ) ||
  				 ( material && material.isMeshPhongMaterial ) ||
  				 ( material && material.isMeshStandardMaterial ) ||
  				 material.envMap ) {

  				var uCamPos = p_uniforms.map.cameraPosition;

  				if ( uCamPos !== undefined ) {

  					uCamPos.setValue( _gl,
  							_vector3.setFromMatrixPosition( camera.matrixWorld ) );

  				}

  			}

  			if ( ( material && material.isMeshPhongMaterial ) ||
  				 ( material && material.isMeshLambertMaterial ) ||
  				 ( material && material.isMeshBasicMaterial ) ||
  				 ( material && material.isMeshStandardMaterial ) ||
  				 ( material && material.isShaderMaterial ) ||
  				 material.skinning ) {

  				p_uniforms.setValue( _gl, 'viewMatrix', camera.matrixWorldInverse );

  			}

  			p_uniforms.set( _gl, _this, 'toneMappingExposure' );
  			p_uniforms.set( _gl, _this, 'toneMappingWhitePoint' );

  		}

  		// skinning uniforms must be set even if material didn't change
  		// auto-setting of texture unit for bone texture must go before other textures
  		// not sure why, but otherwise weird things happen

  		if ( material.skinning ) {

  			p_uniforms.setOptional( _gl, object, 'bindMatrix' );
  			p_uniforms.setOptional( _gl, object, 'bindMatrixInverse' );

  			var skeleton = object.skeleton;

  			if ( skeleton ) {

  				if ( capabilities.floatVertexTextures && skeleton.useVertexTexture ) {

  					p_uniforms.set( _gl, skeleton, 'boneTexture' );
  					p_uniforms.set( _gl, skeleton, 'boneTextureWidth' );
  					p_uniforms.set( _gl, skeleton, 'boneTextureHeight' );

  				} else {

  					p_uniforms.setOptional( _gl, skeleton, 'boneMatrices' );

  				}

  			}

  		}

  		if ( refreshMaterial ) {

  			if ( material.lights ) {

  				// the current material requires lighting info

  				// note: all lighting uniforms are always set correctly
  				// they simply reference the renderer's state for their
  				// values
  				//
  				// use the current material's .needsUpdate flags to set
  				// the GL state when required

  				markUniformsLightsNeedsUpdate( m_uniforms, refreshLights );

  			}

  			// refresh uniforms common to several materials

  			if ( fog && material.fog ) {

  				refreshUniformsFog( m_uniforms, fog );

  			}

  			if ( ( material && material.isMeshBasicMaterial ) ||
  				 ( material && material.isMeshLambertMaterial ) ||
  				 ( material && material.isMeshPhongMaterial ) ||
  				 ( material && material.isMeshStandardMaterial ) ||
  				 ( material && material.isMeshDepthMaterial ) ) {

  				refreshUniformsCommon( m_uniforms, material );

  			}

  			// refresh single material specific uniforms

  			if ( material && material.isLineBasicMaterial ) {

  				refreshUniformsLine( m_uniforms, material );

  			} else if ( material && material.isLineDashedMaterial ) {

  				refreshUniformsLine( m_uniforms, material );
  				refreshUniformsDash( m_uniforms, material );

  			} else if ( material && material.isPointsMaterial ) {

  				refreshUniformsPoints( m_uniforms, material );

  			} else if ( material && material.isMeshLambertMaterial ) {

  				refreshUniformsLambert( m_uniforms, material );

  			} else if ( material && material.isMeshPhongMaterial ) {

  				refreshUniformsPhong( m_uniforms, material );

  			} else if ( material && material.isMeshPhysicalMaterial ) {

  				refreshUniformsPhysical( m_uniforms, material );

  			} else if ( material && material.isMeshStandardMaterial ) {

  				refreshUniformsStandard( m_uniforms, material );

  			} else if ( material && material.isMeshDepthMaterial ) {

  				if ( material.displacementMap ) {

  					m_uniforms.displacementMap.value = material.displacementMap;
  					m_uniforms.displacementScale.value = material.displacementScale;
  					m_uniforms.displacementBias.value = material.displacementBias;

  				}

  			} else if ( material && material.isMeshNormalMaterial ) {

  				m_uniforms.opacity.value = material.opacity;

  			}

  			exports.WebGLUniforms.upload(
  					_gl, materialProperties.uniformsList, m_uniforms, _this );

  		}


  		// common matrices

  		p_uniforms.set( _gl, object, 'modelViewMatrix' );
  		p_uniforms.set( _gl, object, 'normalMatrix' );
  		p_uniforms.setValue( _gl, 'modelMatrix', object.matrixWorld );


  		// dynamic uniforms

  		var dynUniforms = materialProperties.dynamicUniforms;

  		if ( dynUniforms !== null ) {

  			exports.WebGLUniforms.evalDynamic(
  					dynUniforms, m_uniforms, object, camera );

  			exports.WebGLUniforms.upload( _gl, dynUniforms, m_uniforms, _this );

  		}

  		return program;

  	}

  	// Uniforms (refresh uniforms objects)

  	function refreshUniformsCommon( uniforms, material ) {

  		uniforms.opacity.value = material.opacity;

  		uniforms.diffuse.value = material.color;

  		if ( material.emissive ) {

  			uniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );

  		}

  		uniforms.map.value = material.map;
  		uniforms.specularMap.value = material.specularMap;
  		uniforms.alphaMap.value = material.alphaMap;

  		if ( material.aoMap ) {

  			uniforms.aoMap.value = material.aoMap;
  			uniforms.aoMapIntensity.value = material.aoMapIntensity;

  		}

  		// uv repeat and offset setting priorities
  		// 1. color map
  		// 2. specular map
  		// 3. normal map
  		// 4. bump map
  		// 5. alpha map
  		// 6. emissive map

  		var uvScaleMap;

  		if ( material.map ) {

  			uvScaleMap = material.map;

  		} else if ( material.specularMap ) {

  			uvScaleMap = material.specularMap;

  		} else if ( material.displacementMap ) {

  			uvScaleMap = material.displacementMap;

  		} else if ( material.normalMap ) {

  			uvScaleMap = material.normalMap;

  		} else if ( material.bumpMap ) {

  			uvScaleMap = material.bumpMap;

  		} else if ( material.roughnessMap ) {

  			uvScaleMap = material.roughnessMap;

  		} else if ( material.metalnessMap ) {

  			uvScaleMap = material.metalnessMap;

  		} else if ( material.alphaMap ) {

  			uvScaleMap = material.alphaMap;

  		} else if ( material.emissiveMap ) {

  			uvScaleMap = material.emissiveMap;

  		}

  		if ( uvScaleMap !== undefined ) {

  			// backwards compatibility
  			if ( (uvScaleMap && uvScaleMap.isWebGLRenderTarget) ) {

  				uvScaleMap = uvScaleMap.texture;

  			}

  			var offset = uvScaleMap.offset;
  			var repeat = uvScaleMap.repeat;

  			uniforms.offsetRepeat.value.set( offset.x, offset.y, repeat.x, repeat.y );

  		}

  		uniforms.envMap.value = material.envMap;

  		// don't flip CubeTexture envMaps, flip everything else:
  		//  WebGLRenderTargetCube will be flipped for backwards compatibility
  		//  WebGLRenderTargetCube.texture will be flipped because it's a Texture and NOT a CubeTexture
  		// this check must be handled differently, or removed entirely, if WebGLRenderTargetCube uses a CubeTexture in the future
  		uniforms.flipEnvMap.value = ( ! ( material.envMap && material.envMap.isCubeTexture ) ) ? 1 : - 1;

  		uniforms.reflectivity.value = material.reflectivity;
  		uniforms.refractionRatio.value = material.refractionRatio;

  	}

  	function refreshUniformsLine( uniforms, material ) {

  		uniforms.diffuse.value = material.color;
  		uniforms.opacity.value = material.opacity;

  	}

  	function refreshUniformsDash( uniforms, material ) {

  		uniforms.dashSize.value = material.dashSize;
  		uniforms.totalSize.value = material.dashSize + material.gapSize;
  		uniforms.scale.value = material.scale;

  	}

  	function refreshUniformsPoints( uniforms, material ) {

  		uniforms.diffuse.value = material.color;
  		uniforms.opacity.value = material.opacity;
  		uniforms.size.value = material.size * _pixelRatio;
  		uniforms.scale.value = _canvas.clientHeight * 0.5;

  		uniforms.map.value = material.map;

  		if ( material.map !== null ) {

  			var offset = material.map.offset;
  			var repeat = material.map.repeat;

  			uniforms.offsetRepeat.value.set( offset.x, offset.y, repeat.x, repeat.y );

  		}

  	}

  	function refreshUniformsFog( uniforms, fog ) {

  		uniforms.fogColor.value = fog.color;

  		if ( fog && fog.isFog ) {

  			uniforms.fogNear.value = fog.near;
  			uniforms.fogFar.value = fog.far;

  		} else if ( fog && fog.isFogExp2 ) {

  			uniforms.fogDensity.value = fog.density;

  		}

  	}

  	function refreshUniformsLambert( uniforms, material ) {

  		if ( material.lightMap ) {

  			uniforms.lightMap.value = material.lightMap;
  			uniforms.lightMapIntensity.value = material.lightMapIntensity;

  		}

  		if ( material.emissiveMap ) {

  			uniforms.emissiveMap.value = material.emissiveMap;

  		}

  	}

  	function refreshUniformsPhong( uniforms, material ) {

  		uniforms.specular.value = material.specular;
  		uniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )

  		if ( material.lightMap ) {

  			uniforms.lightMap.value = material.lightMap;
  			uniforms.lightMapIntensity.value = material.lightMapIntensity;

  		}

  		if ( material.emissiveMap ) {

  			uniforms.emissiveMap.value = material.emissiveMap;

  		}

  		if ( material.bumpMap ) {

  			uniforms.bumpMap.value = material.bumpMap;
  			uniforms.bumpScale.value = material.bumpScale;

  		}

  		if ( material.normalMap ) {

  			uniforms.normalMap.value = material.normalMap;
  			uniforms.normalScale.value.copy( material.normalScale );

  		}

  		if ( material.displacementMap ) {

  			uniforms.displacementMap.value = material.displacementMap;
  			uniforms.displacementScale.value = material.displacementScale;
  			uniforms.displacementBias.value = material.displacementBias;

  		}

  	}

  	function refreshUniformsStandard( uniforms, material ) {

  		uniforms.roughness.value = material.roughness;
  		uniforms.metalness.value = material.metalness;

  		if ( material.roughnessMap ) {

  			uniforms.roughnessMap.value = material.roughnessMap;

  		}

  		if ( material.metalnessMap ) {

  			uniforms.metalnessMap.value = material.metalnessMap;

  		}

  		if ( material.lightMap ) {

  			uniforms.lightMap.value = material.lightMap;
  			uniforms.lightMapIntensity.value = material.lightMapIntensity;

  		}

  		if ( material.emissiveMap ) {

  			uniforms.emissiveMap.value = material.emissiveMap;

  		}

  		if ( material.bumpMap ) {

  			uniforms.bumpMap.value = material.bumpMap;
  			uniforms.bumpScale.value = material.bumpScale;

  		}

  		if ( material.normalMap ) {

  			uniforms.normalMap.value = material.normalMap;
  			uniforms.normalScale.value.copy( material.normalScale );

  		}

  		if ( material.displacementMap ) {

  			uniforms.displacementMap.value = material.displacementMap;
  			uniforms.displacementScale.value = material.displacementScale;
  			uniforms.displacementBias.value = material.displacementBias;

  		}

  		if ( material.envMap ) {

  			//uniforms.envMap.value = material.envMap; // part of uniforms common
  			uniforms.envMapIntensity.value = material.envMapIntensity;

  		}

  	}

  	function refreshUniformsPhysical( uniforms, material ) {

  		uniforms.clearCoat.value = material.clearCoat;
  		uniforms.clearCoatRoughness.value = material.clearCoatRoughness;

  		refreshUniformsStandard( uniforms, material );

  	}

  	// If uniforms are marked as clean, they don't need to be loaded to the GPU.

  	function markUniformsLightsNeedsUpdate( uniforms, value ) {

  		uniforms.ambientLightColor.needsUpdate = value;

  		uniforms.directionalLights.needsUpdate = value;
  		uniforms.pointLights.needsUpdate = value;
  		uniforms.spotLights.needsUpdate = value;
  		uniforms.hemisphereLights.needsUpdate = value;

  	}

  	// Lighting

  	function setupShadows( lights ) {

  		var lightShadowsLength = 0;

  		for ( var i = 0, l = lights.length; i < l; i ++ ) {

  			var light = lights[ i ];

  			if ( light.castShadow ) {

  				_lights.shadows[ lightShadowsLength ++ ] = light;

  			}

  		}

  		_lights.shadows.length = lightShadowsLength;

  	}

  	function setupLights( lights, camera ) {

  		var l, ll, light,
  		r = 0, g = 0, b = 0,
  		color,
  		intensity,
  		distance,
  		shadowMap,

  		viewMatrix = camera.matrixWorldInverse,

  		directionalLength = 0,
  		pointLength = 0,
  		spotLength = 0,
  		hemiLength = 0;

  		for ( l = 0, ll = lights.length; l < ll; l ++ ) {

  			light = lights[ l ];

  			color = light.color;
  			intensity = light.intensity;
  			distance = light.distance;

  			shadowMap = ( light.shadow && light.shadow.map ) ? light.shadow.map.texture : null;

  			if ( light && light.isAmbientLight ) {

  				r += color.r * intensity;
  				g += color.g * intensity;
  				b += color.b * intensity;

  			} else if ( light && light.isDirectionalLight ) {

  				var uniforms = lightCache.get( light );

  				uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
  				uniforms.direction.setFromMatrixPosition( light.matrixWorld );
  				_vector3.setFromMatrixPosition( light.target.matrixWorld );
  				uniforms.direction.sub( _vector3 );
  				uniforms.direction.transformDirection( viewMatrix );

  				uniforms.shadow = light.castShadow;

  				if ( light.castShadow ) {

  					uniforms.shadowBias = light.shadow.bias;
  					uniforms.shadowRadius = light.shadow.radius;
  					uniforms.shadowMapSize = light.shadow.mapSize;

  				}

  				_lights.directionalShadowMap[ directionalLength ] = shadowMap;
  				_lights.directionalShadowMatrix[ directionalLength ] = light.shadow.matrix;
  				_lights.directional[ directionalLength ++ ] = uniforms;

  			} else if ( light && light.isSpotLight ) {

  				var uniforms = lightCache.get( light );

  				uniforms.position.setFromMatrixPosition( light.matrixWorld );
  				uniforms.position.applyMatrix4( viewMatrix );

  				uniforms.color.copy( color ).multiplyScalar( intensity );
  				uniforms.distance = distance;

  				uniforms.direction.setFromMatrixPosition( light.matrixWorld );
  				_vector3.setFromMatrixPosition( light.target.matrixWorld );
  				uniforms.direction.sub( _vector3 );
  				uniforms.direction.transformDirection( viewMatrix );

  				uniforms.coneCos = Math.cos( light.angle );
  				uniforms.penumbraCos = Math.cos( light.angle * ( 1 - light.penumbra ) );
  				uniforms.decay = ( light.distance === 0 ) ? 0.0 : light.decay;

  				uniforms.shadow = light.castShadow;

  				if ( light.castShadow ) {

  					uniforms.shadowBias = light.shadow.bias;
  					uniforms.shadowRadius = light.shadow.radius;
  					uniforms.shadowMapSize = light.shadow.mapSize;

  				}

  				_lights.spotShadowMap[ spotLength ] = shadowMap;
  				_lights.spotShadowMatrix[ spotLength ] = light.shadow.matrix;
  				_lights.spot[ spotLength ++ ] = uniforms;

  			} else if ( light && light.isPointLight ) {

  				var uniforms = lightCache.get( light );

  				uniforms.position.setFromMatrixPosition( light.matrixWorld );
  				uniforms.position.applyMatrix4( viewMatrix );

  				uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
  				uniforms.distance = light.distance;
  				uniforms.decay = ( light.distance === 0 ) ? 0.0 : light.decay;

  				uniforms.shadow = light.castShadow;

  				if ( light.castShadow ) {

  					uniforms.shadowBias = light.shadow.bias;
  					uniforms.shadowRadius = light.shadow.radius;
  					uniforms.shadowMapSize = light.shadow.mapSize;

  				}

  				_lights.pointShadowMap[ pointLength ] = shadowMap;

  				if ( _lights.pointShadowMatrix[ pointLength ] === undefined ) {

  					_lights.pointShadowMatrix[ pointLength ] = new Matrix4();

  				}

  				// for point lights we set the shadow matrix to be a translation-only matrix
  				// equal to inverse of the light's position
  				_vector3.setFromMatrixPosition( light.matrixWorld ).negate();
  				_lights.pointShadowMatrix[ pointLength ].identity().setPosition( _vector3 );

  				_lights.point[ pointLength ++ ] = uniforms;

  			} else if ( light && light.isHemisphereLight ) {

  				var uniforms = lightCache.get( light );

  				uniforms.direction.setFromMatrixPosition( light.matrixWorld );
  				uniforms.direction.transformDirection( viewMatrix );
  				uniforms.direction.normalize();

  				uniforms.skyColor.copy( light.color ).multiplyScalar( intensity );
  				uniforms.groundColor.copy( light.groundColor ).multiplyScalar( intensity );

  				_lights.hemi[ hemiLength ++ ] = uniforms;

  			}

  		}

  		_lights.ambient[ 0 ] = r;
  		_lights.ambient[ 1 ] = g;
  		_lights.ambient[ 2 ] = b;

  		_lights.directional.length = directionalLength;
  		_lights.spot.length = spotLength;
  		_lights.point.length = pointLength;
  		_lights.hemi.length = hemiLength;

  		_lights.hash = directionalLength + ',' + pointLength + ',' + spotLength + ',' + hemiLength + ',' + _lights.shadows.length;

  	}

  	// GL state setting

  	this.setFaceCulling = function ( cullFace, frontFaceDirection ) {

  		state.setCullFace( cullFace );
  		state.setFlipSided( frontFaceDirection === FrontFaceDirectionCW );

  	};

  	// Textures

  	function allocTextureUnit() {

  		var textureUnit = _usedTextureUnits;

  		if ( textureUnit >= capabilities.maxTextures ) {

  			console.warn( 'WebGLRenderer: trying to use ' + textureUnit + ' texture units while this GPU supports only ' + capabilities.maxTextures );

  		}

  		_usedTextureUnits += 1;

  		return textureUnit;

  	}

  	this.allocTextureUnit = allocTextureUnit;

  	// this.setTexture2D = setTexture2D;
  	this.setTexture2D = ( function() {

  		var warned = false;

  		// backwards compatibility: peel texture.texture
  		return function setTexture2D( texture, slot ) {

  			if ( texture && texture.isWebGLRenderTarget ) {

  				if ( ! warned ) {

  					console.warn( "THREE.WebGLRenderer.setTexture2D: don't use render targets as textures. Use their .texture property instead." );
  					warned = true;

  				}

  				texture = texture.texture;

  			}

  			textures.setTexture2D( texture, slot );

  		};

  	}() );

  	this.setTexture = ( function() {

  		var warned = false;

  		return function setTexture( texture, slot ) {

  			if ( ! warned ) {

  				console.warn( "THREE.WebGLRenderer: .setTexture is deprecated, use setTexture2D instead." );
  				warned = true;

  			}

  			textures.setTexture2D( texture, slot );

  		};

  	}() );

  	this.setTextureCube = ( function() {

  		var warned = false;

  		return function setTextureCube( texture, slot ) {

  			// backwards compatibility: peel texture.texture
  			if ( texture && texture.isWebGLRenderTargetCube ) {

  				if ( ! warned ) {

  					console.warn( "THREE.WebGLRenderer.setTextureCube: don't use cube render targets as textures. Use their .texture property instead." );
  					warned = true;

  				}

  				texture = texture.texture;

  			}

  			// currently relying on the fact that WebGLRenderTargetCube.texture is a Texture and NOT a CubeTexture
  			// TODO: unify these code paths
  			if ( ( texture && texture.isCubeTexture ) ||
  				 ( Array.isArray( texture.image ) && texture.image.length === 6 ) ) {

  				// CompressedTexture can have Array in image :/

  				// this function alone should take care of cube textures
  				textures.setTextureCube( texture, slot );

  			} else {

  				// assumed: texture property of THREE.WebGLRenderTargetCube

  				textures.setTextureCubeDynamic( texture, slot );

  			}

  		};

  	}() );

  	this.getCurrentRenderTarget = function() {

  		return _currentRenderTarget;

  	};

  	this.setRenderTarget = function ( renderTarget ) {

  		_currentRenderTarget = renderTarget;

  		if ( renderTarget && properties.get( renderTarget ).__webglFramebuffer === undefined ) {

  			textures.setupRenderTarget( renderTarget );

  		}

  		var isCube = ( renderTarget && renderTarget.isWebGLRenderTargetCube );
  		var framebuffer;

  		if ( renderTarget ) {

  			var renderTargetProperties = properties.get( renderTarget );

  			if ( isCube ) {

  				framebuffer = renderTargetProperties.__webglFramebuffer[ renderTarget.activeCubeFace ];

  			} else {

  				framebuffer = renderTargetProperties.__webglFramebuffer;

  			}

  			_currentScissor.copy( renderTarget.scissor );
  			_currentScissorTest = renderTarget.scissorTest;

  			_currentViewport.copy( renderTarget.viewport );

  		} else {

  			framebuffer = null;

  			_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio );
  			_currentScissorTest = _scissorTest;

  			_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio );

  		}

  		if ( _currentFramebuffer !== framebuffer ) {

  			_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
  			_currentFramebuffer = framebuffer;

  		}

  		state.scissor( _currentScissor );
  		state.setScissorTest( _currentScissorTest );

  		state.viewport( _currentViewport );

  		if ( isCube ) {

  			var textureProperties = properties.get( renderTarget.texture );
  			_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + renderTarget.activeCubeFace, textureProperties.__webglTexture, renderTarget.activeMipMapLevel );

  		}

  	};

  	this.readRenderTargetPixels = function ( renderTarget, x, y, width, height, buffer ) {

  		if ( ( renderTarget && renderTarget.isWebGLRenderTarget ) === false ) {

  			console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.' );
  			return;

  		}

  		var framebuffer = properties.get( renderTarget ).__webglFramebuffer;

  		if ( framebuffer ) {

  			var restore = false;

  			if ( framebuffer !== _currentFramebuffer ) {

  				_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );

  				restore = true;

  			}

  			try {

  				var texture = renderTarget.texture;

  				if ( texture.format !== RGBAFormat && paramThreeToGL( texture.format ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_FORMAT ) ) {

  					console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.' );
  					return;

  				}

  				if ( texture.type !== UnsignedByteType &&
  				     paramThreeToGL( texture.type ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_TYPE ) &&
  				     ! ( texture.type === FloatType && extensions.get( 'WEBGL_color_buffer_float' ) ) &&
  				     ! ( texture.type === HalfFloatType && extensions.get( 'EXT_color_buffer_half_float' ) ) ) {

  					console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );
  					return;

  				}

  				if ( _gl.checkFramebufferStatus( _gl.FRAMEBUFFER ) === _gl.FRAMEBUFFER_COMPLETE ) {

  					// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)

  					if ( ( x >= 0 && x <= ( renderTarget.width - width ) ) && ( y >= 0 && y <= ( renderTarget.height - height ) ) ) {

  						_gl.readPixels( x, y, width, height, paramThreeToGL( texture.format ), paramThreeToGL( texture.type ), buffer );

  					}

  				} else {

  					console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.' );

  				}

  			} finally {

  				if ( restore ) {

  					_gl.bindFramebuffer( _gl.FRAMEBUFFER, _currentFramebuffer );

  				}

  			}

  		}

  	};

  	// Map three.js constants to WebGL constants

  	function paramThreeToGL( p ) {

  		var extension;

  		if ( p === RepeatWrapping ) return _gl.REPEAT;
  		if ( p === ClampToEdgeWrapping ) return _gl.CLAMP_TO_EDGE;
  		if ( p === MirroredRepeatWrapping ) return _gl.MIRRORED_REPEAT;

  		if ( p === NearestFilter ) return _gl.NEAREST;
  		if ( p === NearestMipMapNearestFilter ) return _gl.NEAREST_MIPMAP_NEAREST;
  		if ( p === NearestMipMapLinearFilter ) return _gl.NEAREST_MIPMAP_LINEAR;

  		if ( p === LinearFilter ) return _gl.LINEAR;
  		if ( p === LinearMipMapNearestFilter ) return _gl.LINEAR_MIPMAP_NEAREST;
  		if ( p === LinearMipMapLinearFilter ) return _gl.LINEAR_MIPMAP_LINEAR;

  		if ( p === UnsignedByteType ) return _gl.UNSIGNED_BYTE;
  		if ( p === UnsignedShort4444Type ) return _gl.UNSIGNED_SHORT_4_4_4_4;
  		if ( p === UnsignedShort5551Type ) return _gl.UNSIGNED_SHORT_5_5_5_1;
  		if ( p === UnsignedShort565Type ) return _gl.UNSIGNED_SHORT_5_6_5;

  		if ( p === ByteType ) return _gl.BYTE;
  		if ( p === ShortType ) return _gl.SHORT;
  		if ( p === UnsignedShortType ) return _gl.UNSIGNED_SHORT;
  		if ( p === IntType ) return _gl.INT;
  		if ( p === UnsignedIntType ) return _gl.UNSIGNED_INT;
  		if ( p === FloatType ) return _gl.FLOAT;

  		extension = extensions.get( 'OES_texture_half_float' );

  		if ( extension !== null ) {

  			if ( p === HalfFloatType ) return extension.HALF_FLOAT_OES;

  		}

  		if ( p === AlphaFormat ) return _gl.ALPHA;
  		if ( p === RGBFormat ) return _gl.RGB;
  		if ( p === RGBAFormat ) return _gl.RGBA;
  		if ( p === LuminanceFormat ) return _gl.LUMINANCE;
  		if ( p === LuminanceAlphaFormat ) return _gl.LUMINANCE_ALPHA;
  		if ( p === DepthFormat ) return _gl.DEPTH_COMPONENT;

  		if ( p === AddEquation ) return _gl.FUNC_ADD;
  		if ( p === SubtractEquation ) return _gl.FUNC_SUBTRACT;
  		if ( p === ReverseSubtractEquation ) return _gl.FUNC_REVERSE_SUBTRACT;

  		if ( p === ZeroFactor ) return _gl.ZERO;
  		if ( p === OneFactor ) return _gl.ONE;
  		if ( p === SrcColorFactor ) return _gl.SRC_COLOR;
  		if ( p === OneMinusSrcColorFactor ) return _gl.ONE_MINUS_SRC_COLOR;
  		if ( p === SrcAlphaFactor ) return _gl.SRC_ALPHA;
  		if ( p === OneMinusSrcAlphaFactor ) return _gl.ONE_MINUS_SRC_ALPHA;
  		if ( p === DstAlphaFactor ) return _gl.DST_ALPHA;
  		if ( p === OneMinusDstAlphaFactor ) return _gl.ONE_MINUS_DST_ALPHA;

  		if ( p === DstColorFactor ) return _gl.DST_COLOR;
  		if ( p === OneMinusDstColorFactor ) return _gl.ONE_MINUS_DST_COLOR;
  		if ( p === SrcAlphaSaturateFactor ) return _gl.SRC_ALPHA_SATURATE;

  		extension = extensions.get( 'WEBGL_compressed_texture_s3tc' );

  		if ( extension !== null ) {

  			if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
  			if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
  			if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
  			if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;

  		}

  		extension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );

  		if ( extension !== null ) {

  			if ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
  			if ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
  			if ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
  			if ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;

  		}

  		extension = extensions.get( 'WEBGL_compressed_texture_etc1' );

  		if ( extension !== null ) {

  			if ( p === RGB_ETC1_Format ) return extension.COMPRESSED_RGB_ETC1_WEBGL;

  		}

  		extension = extensions.get( 'EXT_blend_minmax' );

  		if ( extension !== null ) {

  			if ( p === MinEquation ) return extension.MIN_EXT;
  			if ( p === MaxEquation ) return extension.MAX_EXT;

  		}

  		return 0;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function FogExp2( color, density ) {

  	this.name = '';

  	this.color = new Color( color );
  	this.density = ( density !== undefined ) ? density : 0.00025;

  };

  FogExp2.prototype.isFogExp2 = true;

  FogExp2.prototype.clone = function () {

  	return new FogExp2( this.color.getHex(), this.density );

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function Fog( color, near, far ) {

  	this.name = '';

  	this.color = new Color( color );

  	this.near = ( near !== undefined ) ? near : 1;
  	this.far = ( far !== undefined ) ? far : 1000;

  };

  Fog.prototype.isFog = true;

  Fog.prototype.clone = function () {

  	return new Fog( this.color.getHex(), this.near, this.far );

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function Scene() {

  	Object3D.call( this );

  	this.type = 'Scene';

  	this.background = null;
  	this.fog = null;
  	this.overrideMaterial = null;

  	this.autoUpdate = true; // checked by the renderer

  };

  Scene.prototype = Object.create( Object3D.prototype );
  Scene.prototype.constructor = Scene;

  Scene.prototype.copy = function ( source, recursive ) {

  	Object3D.prototype.copy.call( this, source, recursive );

  	if ( source.background !== null ) this.background = source.background.clone();
  	if ( source.fog !== null ) this.fog = source.fog.clone();
  	if ( source.overrideMaterial !== null ) this.overrideMaterial = source.overrideMaterial.clone();

  	this.autoUpdate = source.autoUpdate;
  	this.matrixAutoUpdate = source.matrixAutoUpdate;

  	return this;

  };

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   */

  function LensFlare( texture, size, distance, blending, color ) {

  	Object3D.call( this );

  	this.lensFlares = [];

  	this.positionScreen = new Vector3();
  	this.customUpdateCallback = undefined;

  	if ( texture !== undefined ) {

  		this.add( texture, size, distance, blending, color );

  	}

  };

  LensFlare.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: LensFlare,

  	isLensFlare: true,

  	copy: function ( source ) {

  		Object3D.prototype.copy.call( this, source );

  		this.positionScreen.copy( source.positionScreen );
  		this.customUpdateCallback = source.customUpdateCallback;

  		for ( var i = 0, l = source.lensFlares.length; i < l; i ++ ) {

  			this.lensFlares.push( source.lensFlares[ i ] );

  		}

  		return this;

  	},

  	add: function ( texture, size, distance, blending, color, opacity ) {

  		if ( size === undefined ) size = - 1;
  		if ( distance === undefined ) distance = 0;
  		if ( opacity === undefined ) opacity = 1;
  		if ( color === undefined ) color = new Color( 0xffffff );
  		if ( blending === undefined ) blending = NormalBlending;

  		distance = Math.min( distance, Math.max( 0, distance ) );

  		this.lensFlares.push( {
  			texture: texture,	// THREE.Texture
  			size: size, 		// size in pixels (-1 = use texture.width)
  			distance: distance, 	// distance (0-1) from light source (0=at light source)
  			x: 0, y: 0, z: 0,	// screen position (-1 => 1) z = 0 is in front z = 1 is back
  			scale: 1, 		// scale
  			rotation: 0, 		// rotation
  			opacity: opacity,	// opacity
  			color: color,		// color
  			blending: blending	// blending
  		} );

  	},

  	/*
  	 * Update lens flares update positions on all flares based on the screen position
  	 * Set myLensFlare.customUpdateCallback to alter the flares in your project specific way.
  	 */

  	updateLensFlares: function () {

  		var f, fl = this.lensFlares.length;
  		var flare;
  		var vecX = - this.positionScreen.x * 2;
  		var vecY = - this.positionScreen.y * 2;

  		for ( f = 0; f < fl; f ++ ) {

  			flare = this.lensFlares[ f ];

  			flare.x = this.positionScreen.x + vecX * flare.distance;
  			flare.y = this.positionScreen.y + vecY * flare.distance;

  			flare.wantedRotation = flare.x * Math.PI * 0.25;
  			flare.rotation += ( flare.wantedRotation - flare.rotation ) * 0.25;

  		}

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  opacity: <float>,
   *  map: new THREE.Texture( <Image> ),
   *
   *	uvOffset: new THREE.Vector2(),
   *	uvScale: new THREE.Vector2()
   * }
   */

  function SpriteMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'SpriteMaterial';

  	this.color = new Color( 0xffffff );
  	this.map = null;

  	this.rotation = 0;

  	this.fog = false;
  	this.lights = false;

  	this.setValues( parameters );

  };

  SpriteMaterial.prototype = Object.create( Material.prototype );
  SpriteMaterial.prototype.constructor = SpriteMaterial;

  SpriteMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );
  	this.map = source.map;

  	this.rotation = source.rotation;

  	return this;

  };

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   */

  function Sprite( material ) {

  	Object3D.call( this );

  	this.type = 'Sprite';

  	this.material = ( material !== undefined ) ? material : new SpriteMaterial();

  };

  Sprite.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Sprite,

  	isSprite: true,

  	raycast: ( function () {

  		var matrixPosition = new Vector3();

  		return function raycast( raycaster, intersects ) {

  			matrixPosition.setFromMatrixPosition( this.matrixWorld );

  			var distanceSq = raycaster.ray.distanceSqToPoint( matrixPosition );
  			var guessSizeSq = this.scale.x * this.scale.y / 4;

  			if ( distanceSq > guessSizeSq ) {

  				return;

  			}

  			intersects.push( {

  				distance: Math.sqrt( distanceSq ),
  				point: this.position,
  				face: null,
  				object: this

  			} );

  		};

  	}() ),

  	clone: function () {

  		return new this.constructor( this.material ).copy( this );

  	}

  } );

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   */

  function LOD() {

  	Object3D.call( this );

  	this.type = 'LOD';

  	Object.defineProperties( this, {
  		levels: {
  			enumerable: true,
  			value: []
  		}
  	} );

  };


  LOD.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: LOD,

  	copy: function ( source ) {

  		Object3D.prototype.copy.call( this, source, false );

  		var levels = source.levels;

  		for ( var i = 0, l = levels.length; i < l; i ++ ) {

  			var level = levels[ i ];

  			this.addLevel( level.object.clone(), level.distance );

  		}

  		return this;

  	},

  	addLevel: function ( object, distance ) {

  		if ( distance === undefined ) distance = 0;

  		distance = Math.abs( distance );

  		var levels = this.levels;

  		for ( var l = 0; l < levels.length; l ++ ) {

  			if ( distance < levels[ l ].distance ) {

  				break;

  			}

  		}

  		levels.splice( l, 0, { distance: distance, object: object } );

  		this.add( object );

  	},

  	getObjectForDistance: function ( distance ) {

  		var levels = this.levels;

  		for ( var i = 1, l = levels.length; i < l; i ++ ) {

  			if ( distance < levels[ i ].distance ) {

  				break;

  			}

  		}

  		return levels[ i - 1 ].object;

  	},

  	raycast: ( function () {

  		var matrixPosition = new Vector3();

  		return function raycast( raycaster, intersects ) {

  			matrixPosition.setFromMatrixPosition( this.matrixWorld );

  			var distance = raycaster.ray.origin.distanceTo( matrixPosition );

  			this.getObjectForDistance( distance ).raycast( raycaster, intersects );

  		};

  	}() ),

  	update: function () {

  		var v1 = new Vector3();
  		var v2 = new Vector3();

  		return function update( camera ) {

  			var levels = this.levels;

  			if ( levels.length > 1 ) {

  				v1.setFromMatrixPosition( camera.matrixWorld );
  				v2.setFromMatrixPosition( this.matrixWorld );

  				var distance = v1.distanceTo( v2 );

  				levels[ 0 ].object.visible = true;

  				for ( var i = 1, l = levels.length; i < l; i ++ ) {

  					if ( distance >= levels[ i ].distance ) {

  						levels[ i - 1 ].object.visible = false;
  						levels[ i ].object.visible = true;

  					} else {

  						break;

  					}

  				}

  				for ( ; i < l; i ++ ) {

  					levels[ i ].object.visible = false;

  				}

  			}

  		};

  	}(),

  	toJSON: function ( meta ) {

  		var data = Object3D.prototype.toJSON.call( this, meta );

  		data.object.levels = [];

  		var levels = this.levels;

  		for ( var i = 0, l = levels.length; i < l; i ++ ) {

  			var level = levels[ i ];

  			data.object.levels.push( {
  				object: level.object.uuid,
  				distance: level.distance
  			} );

  		}

  		return data;

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function DataTexture( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {

  	Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

  	this.image = { data: data, width: width, height: height };

  	this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
  	this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;

  	this.flipY = false;
  	this.generateMipmaps  = false;

  };

  DataTexture.prototype = Object.create( Texture.prototype );
  DataTexture.prototype.constructor = DataTexture;

  DataTexture.prototype.isDataTexture = true;

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   * @author michael guerrero / http://realitymeltdown.com
   * @author ikerr / http://verold.com
   */

  function Skeleton( bones, boneInverses, useVertexTexture ) {

  	this.useVertexTexture = useVertexTexture !== undefined ? useVertexTexture : true;

  	this.identityMatrix = new Matrix4();

  	// copy the bone array

  	bones = bones || [];

  	this.bones = bones.slice( 0 );

  	// create a bone texture or an array of floats

  	if ( this.useVertexTexture ) {

  		// layout (1 matrix = 4 pixels)
  		//      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
  		//  with  8x8  pixel texture max   16 bones * 4 pixels =  (8 * 8)
  		//       16x16 pixel texture max   64 bones * 4 pixels = (16 * 16)
  		//       32x32 pixel texture max  256 bones * 4 pixels = (32 * 32)
  		//       64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)


  		var size = Math.sqrt( this.bones.length * 4 ); // 4 pixels needed for 1 matrix
  		size = exports.Math.nextPowerOfTwo( Math.ceil( size ) );
  		size = Math.max( size, 4 );

  		this.boneTextureWidth = size;
  		this.boneTextureHeight = size;

  		this.boneMatrices = new Float32Array( this.boneTextureWidth * this.boneTextureHeight * 4 ); // 4 floats per RGBA pixel
  		this.boneTexture = new DataTexture( this.boneMatrices, this.boneTextureWidth, this.boneTextureHeight, RGBAFormat, FloatType );

  	} else {

  		this.boneMatrices = new Float32Array( 16 * this.bones.length );

  	}

  	// use the supplied bone inverses or calculate the inverses

  	if ( boneInverses === undefined ) {

  		this.calculateInverses();

  	} else {

  		if ( this.bones.length === boneInverses.length ) {

  			this.boneInverses = boneInverses.slice( 0 );

  		} else {

  			console.warn( 'THREE.Skeleton bonInverses is the wrong length.' );

  			this.boneInverses = [];

  			for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

  				this.boneInverses.push( new Matrix4() );

  			}

  		}

  	}

  };

  Object.assign( Skeleton.prototype, {

  	calculateInverses: function () {

  		this.boneInverses = [];

  		for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

  			var inverse = new Matrix4();

  			if ( this.bones[ b ] ) {

  				inverse.getInverse( this.bones[ b ].matrixWorld );

  			}

  			this.boneInverses.push( inverse );

  		}

  	},

  	pose: function () {

  		var bone;

  		// recover the bind-time world matrices

  		for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

  			bone = this.bones[ b ];

  			if ( bone ) {

  				bone.matrixWorld.getInverse( this.boneInverses[ b ] );

  			}

  		}

  		// compute the local matrices, positions, rotations and scales

  		for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

  			bone = this.bones[ b ];

  			if ( bone ) {

  				if ( (bone.parent && bone.parent.isBone) ) {

  					bone.matrix.getInverse( bone.parent.matrixWorld );
  					bone.matrix.multiply( bone.matrixWorld );

  				} else {

  					bone.matrix.copy( bone.matrixWorld );

  				}

  				bone.matrix.decompose( bone.position, bone.quaternion, bone.scale );

  			}

  		}

  	},

  	update: ( function () {

  		var offsetMatrix = new Matrix4();

  		return function update() {

  			// flatten bone matrices to array

  			for ( var b = 0, bl = this.bones.length; b < bl; b ++ ) {

  				// compute the offset between the current and the original transform

  				var matrix = this.bones[ b ] ? this.bones[ b ].matrixWorld : this.identityMatrix;

  				offsetMatrix.multiplyMatrices( matrix, this.boneInverses[ b ] );
  				offsetMatrix.toArray( this.boneMatrices, b * 16 );

  			}

  			if ( this.useVertexTexture ) {

  				this.boneTexture.needsUpdate = true;

  			}

  		};

  	} )(),

  	clone: function () {

  		return new Skeleton( this.bones, this.boneInverses, this.useVertexTexture );

  	}

  } );

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   * @author ikerr / http://verold.com
   */

  function Bone( skin ) {

  	Object3D.call( this );

  	this.type = 'Bone';

  	this.skin = skin;

  };

  Bone.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Bone,

  	isBone: true,

  	copy: function ( source ) {

  		Object3D.prototype.copy.call( this, source );

  		this.skin = source.skin;

  		return this;

  	}

  } );

  /**
   * @author mikael emtinger / http://gomo.se/
   * @author alteredq / http://alteredqualia.com/
   * @author ikerr / http://verold.com
   */

  function SkinnedMesh( geometry, material, useVertexTexture ) {

  	Mesh.call( this, geometry, material );

  	this.type = 'SkinnedMesh';

  	this.bindMode = "attached";
  	this.bindMatrix = new Matrix4();
  	this.bindMatrixInverse = new Matrix4();

  	// init bones

  	// TODO: remove bone creation as there is no reason (other than
  	// convenience) for THREE.SkinnedMesh to do this.

  	var bones = [];

  	if ( this.geometry && this.geometry.bones !== undefined ) {

  		var bone, gbone;

  		for ( var b = 0, bl = this.geometry.bones.length; b < bl; ++ b ) {

  			gbone = this.geometry.bones[ b ];

  			bone = new Bone( this );
  			bones.push( bone );

  			bone.name = gbone.name;
  			bone.position.fromArray( gbone.pos );
  			bone.quaternion.fromArray( gbone.rotq );
  			if ( gbone.scl !== undefined ) bone.scale.fromArray( gbone.scl );

  		}

  		for ( var b = 0, bl = this.geometry.bones.length; b < bl; ++ b ) {

  			gbone = this.geometry.bones[ b ];

  			if ( gbone.parent !== - 1 && gbone.parent !== null &&
  					bones[ gbone.parent ] !== undefined ) {

  				bones[ gbone.parent ].add( bones[ b ] );

  			} else {

  				this.add( bones[ b ] );

  			}

  		}

  	}

  	this.normalizeSkinWeights();

  	this.updateMatrixWorld( true );
  	this.bind( new Skeleton( bones, undefined, useVertexTexture ), this.matrixWorld );

  };


  SkinnedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {

  	constructor: SkinnedMesh,

  	isSkinnedMesh: true,

  	bind: function( skeleton, bindMatrix ) {

  		this.skeleton = skeleton;

  		if ( bindMatrix === undefined ) {

  			this.updateMatrixWorld( true );

  			this.skeleton.calculateInverses();

  			bindMatrix = this.matrixWorld;

  		}

  		this.bindMatrix.copy( bindMatrix );
  		this.bindMatrixInverse.getInverse( bindMatrix );

  	},

  	pose: function () {

  		this.skeleton.pose();

  	},

  	normalizeSkinWeights: function () {

  		if ( (this.geometry && this.geometry.isGeometry) ) {

  			for ( var i = 0; i < this.geometry.skinWeights.length; i ++ ) {

  				var sw = this.geometry.skinWeights[ i ];

  				var scale = 1.0 / sw.lengthManhattan();

  				if ( scale !== Infinity ) {

  					sw.multiplyScalar( scale );

  				} else {

  					sw.set( 1, 0, 0, 0 ); // do something reasonable

  				}

  			}

  		} else if ( (this.geometry && this.geometry.isBufferGeometry) ) {

  			var vec = new Vector4();

  			var skinWeight = this.geometry.attributes.skinWeight;

  			for ( var i = 0; i < skinWeight.count; i ++ ) {

  				vec.x = skinWeight.getX( i );
  				vec.y = skinWeight.getY( i );
  				vec.z = skinWeight.getZ( i );
  				vec.w = skinWeight.getW( i );

  				var scale = 1.0 / vec.lengthManhattan();

  				if ( scale !== Infinity ) {

  					vec.multiplyScalar( scale );

  				} else {

  					vec.set( 1, 0, 0, 0 ); // do something reasonable

  				}

  				skinWeight.setXYZW( i, vec.x, vec.y, vec.z, vec.w );

  			}

  		}

  	},

  	updateMatrixWorld: function( force ) {

  		Mesh.prototype.updateMatrixWorld.call( this, true );

  		if ( this.bindMode === "attached" ) {

  			this.bindMatrixInverse.getInverse( this.matrixWorld );

  		} else if ( this.bindMode === "detached" ) {

  			this.bindMatrixInverse.getInverse( this.bindMatrix );

  		} else {

  			console.warn( 'THREE.SkinnedMesh unrecognized bindMode: ' + this.bindMode );

  		}

  	},

  	clone: function() {

  		return new this.constructor( this.geometry, this.material, this.skeleton.useVertexTexture ).copy( this );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  opacity: <float>,
   *
   *  linewidth: <float>,
   *  linecap: "round",
   *  linejoin: "round"
   * }
   */

  function LineBasicMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'LineBasicMaterial';

  	this.color = new Color( 0xffffff );

  	this.linewidth = 1;
  	this.linecap = 'round';
  	this.linejoin = 'round';

  	this.lights = false;

  	this.setValues( parameters );

  };

  LineBasicMaterial.prototype = Object.create( Material.prototype );
  LineBasicMaterial.prototype.constructor = LineBasicMaterial;

  LineBasicMaterial.prototype.isLineBasicMaterial = true;

  LineBasicMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );

  	this.linewidth = source.linewidth;
  	this.linecap = source.linecap;
  	this.linejoin = source.linejoin;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function Line( geometry, material, mode ) {

  	if ( mode === 1 ) {

  		console.warn( 'THREE.Line: parameter THREE.LinePieces no longer supported. Created THREE.LineSegments instead.' );
  		return new LineSegments( geometry, material );

  	}

  	Object3D.call( this );

  	this.type = 'Line';

  	this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
  	this.material = material !== undefined ? material : new LineBasicMaterial( { color: Math.random() * 0xffffff } );

  };

  Line.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Line,

  	isLine: true,

  	raycast: ( function () {

  		var inverseMatrix = new Matrix4();
  		var ray = new Ray();
  		var sphere = new Sphere();

  		return function raycast( raycaster, intersects ) {

  			var precision = raycaster.linePrecision;
  			var precisionSq = precision * precision;

  			var geometry = this.geometry;
  			var matrixWorld = this.matrixWorld;

  			// Checking boundingSphere distance to ray

  			if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();

  			sphere.copy( geometry.boundingSphere );
  			sphere.applyMatrix4( matrixWorld );

  			if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;

  			//

  			inverseMatrix.getInverse( matrixWorld );
  			ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );

  			var vStart = new Vector3();
  			var vEnd = new Vector3();
  			var interSegment = new Vector3();
  			var interRay = new Vector3();
  			var step = (this && this.isLineSegments) ? 2 : 1;

  			if ( (geometry && geometry.isBufferGeometry) ) {

  				var index = geometry.index;
  				var attributes = geometry.attributes;
  				var positions = attributes.position.array;

  				if ( index !== null ) {

  					var indices = index.array;

  					for ( var i = 0, l = indices.length - 1; i < l; i += step ) {

  						var a = indices[ i ];
  						var b = indices[ i + 1 ];

  						vStart.fromArray( positions, a * 3 );
  						vEnd.fromArray( positions, b * 3 );

  						var distSq = ray.distanceSqToSegment( vStart, vEnd, interRay, interSegment );

  						if ( distSq > precisionSq ) continue;

  						interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

  						var distance = raycaster.ray.origin.distanceTo( interRay );

  						if ( distance < raycaster.near || distance > raycaster.far ) continue;

  						intersects.push( {

  							distance: distance,
  							// What do we want? intersection point on the ray or on the segment??
  							// point: raycaster.ray.at( distance ),
  							point: interSegment.clone().applyMatrix4( this.matrixWorld ),
  							index: i,
  							face: null,
  							faceIndex: null,
  							object: this

  						} );

  					}

  				} else {

  					for ( var i = 0, l = positions.length / 3 - 1; i < l; i += step ) {

  						vStart.fromArray( positions, 3 * i );
  						vEnd.fromArray( positions, 3 * i + 3 );

  						var distSq = ray.distanceSqToSegment( vStart, vEnd, interRay, interSegment );

  						if ( distSq > precisionSq ) continue;

  						interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

  						var distance = raycaster.ray.origin.distanceTo( interRay );

  						if ( distance < raycaster.near || distance > raycaster.far ) continue;

  						intersects.push( {

  							distance: distance,
  							// What do we want? intersection point on the ray or on the segment??
  							// point: raycaster.ray.at( distance ),
  							point: interSegment.clone().applyMatrix4( this.matrixWorld ),
  							index: i,
  							face: null,
  							faceIndex: null,
  							object: this

  						} );

  					}

  				}

  			} else if ( (geometry && geometry.isGeometry) ) {

  				var vertices = geometry.vertices;
  				var nbVertices = vertices.length;

  				for ( var i = 0; i < nbVertices - 1; i += step ) {

  					var distSq = ray.distanceSqToSegment( vertices[ i ], vertices[ i + 1 ], interRay, interSegment );

  					if ( distSq > precisionSq ) continue;

  					interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

  					var distance = raycaster.ray.origin.distanceTo( interRay );

  					if ( distance < raycaster.near || distance > raycaster.far ) continue;

  					intersects.push( {

  						distance: distance,
  						// What do we want? intersection point on the ray or on the segment??
  						// point: raycaster.ray.at( distance ),
  						point: interSegment.clone().applyMatrix4( this.matrixWorld ),
  						index: i,
  						face: null,
  						faceIndex: null,
  						object: this

  					} );

  				}

  			}

  		};

  	}() ),

  	clone: function () {

  		return new this.constructor( this.geometry, this.material ).copy( this );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function LineSegments( geometry, material ) {

  	Line.call( this, geometry, material );

  	this.type = 'LineSegments';

  };

  LineSegments.prototype = Object.assign( Object.create( Line.prototype ), {

  	constructor: LineSegments,

  	isLineSegments: true

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  opacity: <float>,
   *  map: new THREE.Texture( <Image> ),
   *
   *  size: <float>,
   *  sizeAttenuation: <bool>
   * }
   */

  function PointsMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'PointsMaterial';

  	this.color = new Color( 0xffffff );

  	this.map = null;

  	this.size = 1;
  	this.sizeAttenuation = true;

  	this.lights = false;

  	this.setValues( parameters );

  };

  PointsMaterial.prototype = Object.create( Material.prototype );
  PointsMaterial.prototype.constructor = PointsMaterial;

  PointsMaterial.prototype.isPointsMaterial = true;

  PointsMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );

  	this.map = source.map;

  	this.size = source.size;
  	this.sizeAttenuation = source.sizeAttenuation;

  	return this;

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function Points( geometry, material ) {

  	Object3D.call( this );

  	this.type = 'Points';

  	this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
  	this.material = material !== undefined ? material : new PointsMaterial( { color: Math.random() * 0xffffff } );

  };

  Points.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Points,

  	isPoints: true,

  	raycast: ( function () {

  		var inverseMatrix = new Matrix4();
  		var ray = new Ray();
  		var sphere = new Sphere();

  		return function raycast( raycaster, intersects ) {

  			var object = this;
  			var geometry = this.geometry;
  			var matrixWorld = this.matrixWorld;
  			var threshold = raycaster.params.Points.threshold;

  			// Checking boundingSphere distance to ray

  			if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();

  			sphere.copy( geometry.boundingSphere );
  			sphere.applyMatrix4( matrixWorld );

  			if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;

  			//

  			inverseMatrix.getInverse( matrixWorld );
  			ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );

  			var localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );
  			var localThresholdSq = localThreshold * localThreshold;
  			var position = new Vector3();

  			function testPoint( point, index ) {

  				var rayPointDistanceSq = ray.distanceSqToPoint( point );

  				if ( rayPointDistanceSq < localThresholdSq ) {

  					var intersectPoint = ray.closestPointToPoint( point );
  					intersectPoint.applyMatrix4( matrixWorld );

  					var distance = raycaster.ray.origin.distanceTo( intersectPoint );

  					if ( distance < raycaster.near || distance > raycaster.far ) return;

  					intersects.push( {

  						distance: distance,
  						distanceToRay: Math.sqrt( rayPointDistanceSq ),
  						point: intersectPoint.clone(),
  						index: index,
  						face: null,
  						object: object

  					} );

  				}

  			}

  			if ( (geometry && geometry.isBufferGeometry) ) {

  				var index = geometry.index;
  				var attributes = geometry.attributes;
  				var positions = attributes.position.array;

  				if ( index !== null ) {

  					var indices = index.array;

  					for ( var i = 0, il = indices.length; i < il; i ++ ) {

  						var a = indices[ i ];

  						position.fromArray( positions, a * 3 );

  						testPoint( position, a );

  					}

  				} else {

  					for ( var i = 0, l = positions.length / 3; i < l; i ++ ) {

  						position.fromArray( positions, i * 3 );

  						testPoint( position, i );

  					}

  				}

  			} else {

  				var vertices = geometry.vertices;

  				for ( var i = 0, l = vertices.length; i < l; i ++ ) {

  					testPoint( vertices[ i ], i );

  				}

  			}

  		};

  	}() ),

  	clone: function () {

  		return new this.constructor( this.geometry, this.material ).copy( this );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function Group() {

  	Object3D.call( this );

  	this.type = 'Group';

  };

  Group.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Group

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function VideoTexture( video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {

  	Texture.call( this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );

  	this.generateMipmaps = false;

  	var scope = this;

  	function update() {

  		requestAnimationFrame( update );

  		if ( video.readyState >= video.HAVE_CURRENT_DATA ) {

  			scope.needsUpdate = true;

  		}

  	}

  	update();

  };

  VideoTexture.prototype = Object.create( Texture.prototype );
  VideoTexture.prototype.constructor = VideoTexture;

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function CompressedTexture( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {

  	Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

  	this.image = { width: width, height: height };
  	this.mipmaps = mipmaps;

  	// no flipping for cube textures
  	// (also flipping doesn't work for compressed textures )

  	this.flipY = false;

  	// can't generate mipmaps for compressed textures
  	// mips must be embedded in DDS files

  	this.generateMipmaps = false;

  };

  CompressedTexture.prototype = Object.create( Texture.prototype );
  CompressedTexture.prototype.constructor = CompressedTexture;

  CompressedTexture.prototype.isCompressedTexture = true;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function CanvasTexture( canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {

  	Texture.call( this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );

  	this.needsUpdate = true;

  };

  CanvasTexture.prototype = Object.create( Texture.prototype );
  CanvasTexture.prototype.constructor = CanvasTexture;

  /**
   * @author Matt DesLauriers / @mattdesl
   */

  function DepthTexture( width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy ) {

    Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, DepthFormat, type, anisotropy );

    this.image = { width: width, height: height };

    this.type = type !== undefined ? type : UnsignedShortType;

    this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
    this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;

    this.flipY = false;
    this.generateMipmaps  = false;

  };

  DepthTexture.prototype = Object.create( Texture.prototype );
  DepthTexture.prototype.constructor = DepthTexture;

  DepthTexture.prototype.isDepthTexture = true;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function ShadowMaterial() {

  	ShaderMaterial.call( this, {
  		uniforms: exports.UniformsUtils.merge( [
  			exports.UniformsLib[ "lights" ],
  			{
  				opacity: { value: 1.0 }
  			}
  		] ),
  		vertexShader: ShaderChunk[ 'shadow_vert' ],
  		fragmentShader: ShaderChunk[ 'shadow_frag' ]
  	} );

  	this.lights = true;
  	this.transparent = true;

  	Object.defineProperties( this, {
  		opacity: {
  			enumerable: true,
  			get: function () {
  				return this.uniforms.opacity.value;
  			},
  			set: function ( value ) {
  				this.uniforms.opacity.value = value;
  			}
  		}
  	} );

  };

  ShadowMaterial.prototype = Object.create( ShaderMaterial.prototype );
  ShadowMaterial.prototype.constructor = ShadowMaterial;

  ShadowMaterial.prototype.isShadowMaterial = true;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function RawShaderMaterial( parameters ) {

  	ShaderMaterial.call( this, parameters );

  	this.type = 'RawShaderMaterial';

  };

  RawShaderMaterial.prototype = Object.create( ShaderMaterial.prototype );
  RawShaderMaterial.prototype.constructor = RawShaderMaterial;

  RawShaderMaterial.prototype.isRawShaderMaterial = true;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function MultiMaterial( materials ) {

  	this.uuid = exports.Math.generateUUID();

  	this.type = 'MultiMaterial';

  	this.materials = materials instanceof Array ? materials : [];

  	this.visible = true;

  };

  MultiMaterial.prototype = {

  	constructor: MultiMaterial,

  	isMultiMaterial: true,

  	toJSON: function ( meta ) {

  		var output = {
  			metadata: {
  				version: 4.2,
  				type: 'material',
  				generator: 'MaterialExporter'
  			},
  			uuid: this.uuid,
  			type: this.type,
  			materials: []
  		};

  		var materials = this.materials;

  		for ( var i = 0, l = materials.length; i < l; i ++ ) {

  			var material = materials[ i ].toJSON( meta );
  			delete material.metadata;

  			output.materials.push( material );

  		}

  		output.visible = this.visible;

  		return output;

  	},

  	clone: function () {

  		var material = new this.constructor();

  		for ( var i = 0; i < this.materials.length; i ++ ) {

  			material.materials.push( this.materials[ i ].clone() );

  		}

  		material.visible = this.visible;

  		return material;

  	}

  };

  /**
   * @author WestLangley / http://github.com/WestLangley
   *
   * parameters = {
   *  color: <hex>,
   *  roughness: <float>,
   *  metalness: <float>,
   *  opacity: <float>,
   *
   *  map: new THREE.Texture( <Image> ),
   *
   *  lightMap: new THREE.Texture( <Image> ),
   *  lightMapIntensity: <float>
   *
   *  aoMap: new THREE.Texture( <Image> ),
   *  aoMapIntensity: <float>
   *
   *  emissive: <hex>,
   *  emissiveIntensity: <float>
   *  emissiveMap: new THREE.Texture( <Image> ),
   *
   *  bumpMap: new THREE.Texture( <Image> ),
   *  bumpScale: <float>,
   *
   *  normalMap: new THREE.Texture( <Image> ),
   *  normalScale: <Vector2>,
   *
   *  displacementMap: new THREE.Texture( <Image> ),
   *  displacementScale: <float>,
   *  displacementBias: <float>,
   *
   *  roughnessMap: new THREE.Texture( <Image> ),
   *
   *  metalnessMap: new THREE.Texture( <Image> ),
   *
   *  alphaMap: new THREE.Texture( <Image> ),
   *
   *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
   *  envMapIntensity: <float>
   *
   *  refractionRatio: <float>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>,
   *
   *  skinning: <bool>,
   *  morphTargets: <bool>,
   *  morphNormals: <bool>
   * }
   */

  function MeshStandardMaterial( parameters ) {

  	Material.call( this );

  	this.defines = { 'STANDARD': '' };

  	this.type = 'MeshStandardMaterial';

  	this.color = new Color( 0xffffff ); // diffuse
  	this.roughness = 0.5;
  	this.metalness = 0.5;

  	this.map = null;

  	this.lightMap = null;
  	this.lightMapIntensity = 1.0;

  	this.aoMap = null;
  	this.aoMapIntensity = 1.0;

  	this.emissive = new Color( 0x000000 );
  	this.emissiveIntensity = 1.0;
  	this.emissiveMap = null;

  	this.bumpMap = null;
  	this.bumpScale = 1;

  	this.normalMap = null;
  	this.normalScale = new Vector2( 1, 1 );

  	this.displacementMap = null;
  	this.displacementScale = 1;
  	this.displacementBias = 0;

  	this.roughnessMap = null;

  	this.metalnessMap = null;

  	this.alphaMap = null;

  	this.envMap = null;
  	this.envMapIntensity = 1.0;

  	this.refractionRatio = 0.98;

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;
  	this.wireframeLinecap = 'round';
  	this.wireframeLinejoin = 'round';

  	this.skinning = false;
  	this.morphTargets = false;
  	this.morphNormals = false;

  	this.setValues( parameters );

  };

  MeshStandardMaterial.prototype = Object.create( Material.prototype );
  MeshStandardMaterial.prototype.constructor = MeshStandardMaterial;

  MeshStandardMaterial.prototype.isMeshStandardMaterial = true;

  MeshStandardMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.defines = { 'STANDARD': '' };

  	this.color.copy( source.color );
  	this.roughness = source.roughness;
  	this.metalness = source.metalness;

  	this.map = source.map;

  	this.lightMap = source.lightMap;
  	this.lightMapIntensity = source.lightMapIntensity;

  	this.aoMap = source.aoMap;
  	this.aoMapIntensity = source.aoMapIntensity;

  	this.emissive.copy( source.emissive );
  	this.emissiveMap = source.emissiveMap;
  	this.emissiveIntensity = source.emissiveIntensity;

  	this.bumpMap = source.bumpMap;
  	this.bumpScale = source.bumpScale;

  	this.normalMap = source.normalMap;
  	this.normalScale.copy( source.normalScale );

  	this.displacementMap = source.displacementMap;
  	this.displacementScale = source.displacementScale;
  	this.displacementBias = source.displacementBias;

  	this.roughnessMap = source.roughnessMap;

  	this.metalnessMap = source.metalnessMap;

  	this.alphaMap = source.alphaMap;

  	this.envMap = source.envMap;
  	this.envMapIntensity = source.envMapIntensity;

  	this.refractionRatio = source.refractionRatio;

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;
  	this.wireframeLinecap = source.wireframeLinecap;
  	this.wireframeLinejoin = source.wireframeLinejoin;

  	this.skinning = source.skinning;
  	this.morphTargets = source.morphTargets;
  	this.morphNormals = source.morphNormals;

  	return this;

  };

  /**
   * @author WestLangley / http://github.com/WestLangley
   *
   * parameters = {
   *  reflectivity: <float>
   * }
   */

  function MeshPhysicalMaterial( parameters ) {

  	MeshStandardMaterial.call( this );

  	this.defines = { 'PHYSICAL': '' };

  	this.type = 'MeshPhysicalMaterial';

  	this.reflectivity = 0.5; // maps to F0 = 0.04

  	this.clearCoat = 0.0;
  	this.clearCoatRoughness = 0.0;

  	this.setValues( parameters );

  };

  MeshPhysicalMaterial.prototype = Object.create( MeshStandardMaterial.prototype );
  MeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;

  MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;

  MeshPhysicalMaterial.prototype.copy = function ( source ) {

  	MeshStandardMaterial.prototype.copy.call( this, source );

  	this.defines = { 'PHYSICAL': '' };

  	this.reflectivity = source.reflectivity;

  	this.clearCoat = source.clearCoat;
  	this.clearCoatRoughness = source.clearCoatRoughness;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  specular: <hex>,
   *  shininess: <float>,
   *  opacity: <float>,
   *
   *  map: new THREE.Texture( <Image> ),
   *
   *  lightMap: new THREE.Texture( <Image> ),
   *  lightMapIntensity: <float>
   *
   *  aoMap: new THREE.Texture( <Image> ),
   *  aoMapIntensity: <float>
   *
   *  emissive: <hex>,
   *  emissiveIntensity: <float>
   *  emissiveMap: new THREE.Texture( <Image> ),
   *
   *  bumpMap: new THREE.Texture( <Image> ),
   *  bumpScale: <float>,
   *
   *  normalMap: new THREE.Texture( <Image> ),
   *  normalScale: <Vector2>,
   *
   *  displacementMap: new THREE.Texture( <Image> ),
   *  displacementScale: <float>,
   *  displacementBias: <float>,
   *
   *  specularMap: new THREE.Texture( <Image> ),
   *
   *  alphaMap: new THREE.Texture( <Image> ),
   *
   *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
   *  combine: THREE.Multiply,
   *  reflectivity: <float>,
   *  refractionRatio: <float>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>,
   *
   *  skinning: <bool>,
   *  morphTargets: <bool>,
   *  morphNormals: <bool>
   * }
   */

  function MeshPhongMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'MeshPhongMaterial';

  	this.color = new Color( 0xffffff ); // diffuse
  	this.specular = new Color( 0x111111 );
  	this.shininess = 30;

  	this.map = null;

  	this.lightMap = null;
  	this.lightMapIntensity = 1.0;

  	this.aoMap = null;
  	this.aoMapIntensity = 1.0;

  	this.emissive = new Color( 0x000000 );
  	this.emissiveIntensity = 1.0;
  	this.emissiveMap = null;

  	this.bumpMap = null;
  	this.bumpScale = 1;

  	this.normalMap = null;
  	this.normalScale = new Vector2( 1, 1 );

  	this.displacementMap = null;
  	this.displacementScale = 1;
  	this.displacementBias = 0;

  	this.specularMap = null;

  	this.alphaMap = null;

  	this.envMap = null;
  	this.combine = MultiplyOperation;
  	this.reflectivity = 1;
  	this.refractionRatio = 0.98;

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;
  	this.wireframeLinecap = 'round';
  	this.wireframeLinejoin = 'round';

  	this.skinning = false;
  	this.morphTargets = false;
  	this.morphNormals = false;

  	this.setValues( parameters );

  };

  MeshPhongMaterial.prototype = Object.create( Material.prototype );
  MeshPhongMaterial.prototype.constructor = MeshPhongMaterial;

  MeshPhongMaterial.prototype.isMeshPhongMaterial = true;

  MeshPhongMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );
  	this.specular.copy( source.specular );
  	this.shininess = source.shininess;

  	this.map = source.map;

  	this.lightMap = source.lightMap;
  	this.lightMapIntensity = source.lightMapIntensity;

  	this.aoMap = source.aoMap;
  	this.aoMapIntensity = source.aoMapIntensity;

  	this.emissive.copy( source.emissive );
  	this.emissiveMap = source.emissiveMap;
  	this.emissiveIntensity = source.emissiveIntensity;

  	this.bumpMap = source.bumpMap;
  	this.bumpScale = source.bumpScale;

  	this.normalMap = source.normalMap;
  	this.normalScale.copy( source.normalScale );

  	this.displacementMap = source.displacementMap;
  	this.displacementScale = source.displacementScale;
  	this.displacementBias = source.displacementBias;

  	this.specularMap = source.specularMap;

  	this.alphaMap = source.alphaMap;

  	this.envMap = source.envMap;
  	this.combine = source.combine;
  	this.reflectivity = source.reflectivity;
  	this.refractionRatio = source.refractionRatio;

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;
  	this.wireframeLinecap = source.wireframeLinecap;
  	this.wireframeLinejoin = source.wireframeLinejoin;

  	this.skinning = source.skinning;
  	this.morphTargets = source.morphTargets;
  	this.morphNormals = source.morphNormals;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   *
   * parameters = {
   *  opacity: <float>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>
   * }
   */

  function MeshNormalMaterial( parameters ) {

  	Material.call( this, parameters );

  	this.type = 'MeshNormalMaterial';

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;

  	this.fog = false;
  	this.lights = false;
  	this.morphTargets = false;

  	this.setValues( parameters );

  };

  MeshNormalMaterial.prototype = Object.create( Material.prototype );
  MeshNormalMaterial.prototype.constructor = MeshNormalMaterial;

  MeshNormalMaterial.prototype.isMeshNormalMaterial = true;

  MeshNormalMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  opacity: <float>,
   *
   *  map: new THREE.Texture( <Image> ),
   *
   *  lightMap: new THREE.Texture( <Image> ),
   *  lightMapIntensity: <float>
   *
   *  aoMap: new THREE.Texture( <Image> ),
   *  aoMapIntensity: <float>
   *
   *  emissive: <hex>,
   *  emissiveIntensity: <float>
   *  emissiveMap: new THREE.Texture( <Image> ),
   *
   *  specularMap: new THREE.Texture( <Image> ),
   *
   *  alphaMap: new THREE.Texture( <Image> ),
   *
   *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
   *  combine: THREE.Multiply,
   *  reflectivity: <float>,
   *  refractionRatio: <float>,
   *
   *  wireframe: <boolean>,
   *  wireframeLinewidth: <float>,
   *
   *  skinning: <bool>,
   *  morphTargets: <bool>,
   *  morphNormals: <bool>
   * }
   */

  function MeshLambertMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'MeshLambertMaterial';

  	this.color = new Color( 0xffffff ); // diffuse

  	this.map = null;

  	this.lightMap = null;
  	this.lightMapIntensity = 1.0;

  	this.aoMap = null;
  	this.aoMapIntensity = 1.0;

  	this.emissive = new Color( 0x000000 );
  	this.emissiveIntensity = 1.0;
  	this.emissiveMap = null;

  	this.specularMap = null;

  	this.alphaMap = null;

  	this.envMap = null;
  	this.combine = MultiplyOperation;
  	this.reflectivity = 1;
  	this.refractionRatio = 0.98;

  	this.wireframe = false;
  	this.wireframeLinewidth = 1;
  	this.wireframeLinecap = 'round';
  	this.wireframeLinejoin = 'round';

  	this.skinning = false;
  	this.morphTargets = false;
  	this.morphNormals = false;

  	this.setValues( parameters );

  };

  MeshLambertMaterial.prototype = Object.create( Material.prototype );
  MeshLambertMaterial.prototype.constructor = MeshLambertMaterial;

  MeshLambertMaterial.prototype.isMeshLambertMaterial = true;

  MeshLambertMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );

  	this.map = source.map;

  	this.lightMap = source.lightMap;
  	this.lightMapIntensity = source.lightMapIntensity;

  	this.aoMap = source.aoMap;
  	this.aoMapIntensity = source.aoMapIntensity;

  	this.emissive.copy( source.emissive );
  	this.emissiveMap = source.emissiveMap;
  	this.emissiveIntensity = source.emissiveIntensity;

  	this.specularMap = source.specularMap;

  	this.alphaMap = source.alphaMap;

  	this.envMap = source.envMap;
  	this.combine = source.combine;
  	this.reflectivity = source.reflectivity;
  	this.refractionRatio = source.refractionRatio;

  	this.wireframe = source.wireframe;
  	this.wireframeLinewidth = source.wireframeLinewidth;
  	this.wireframeLinecap = source.wireframeLinecap;
  	this.wireframeLinejoin = source.wireframeLinejoin;

  	this.skinning = source.skinning;
  	this.morphTargets = source.morphTargets;
  	this.morphNormals = source.morphNormals;

  	return this;

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   *
   * parameters = {
   *  color: <hex>,
   *  opacity: <float>,
   *
   *  linewidth: <float>,
   *
   *  scale: <float>,
   *  dashSize: <float>,
   *  gapSize: <float>
   * }
   */

  function LineDashedMaterial( parameters ) {

  	Material.call( this );

  	this.type = 'LineDashedMaterial';

  	this.color = new Color( 0xffffff );

  	this.linewidth = 1;

  	this.scale = 1;
  	this.dashSize = 3;
  	this.gapSize = 1;

  	this.lights = false;

  	this.setValues( parameters );

  };

  LineDashedMaterial.prototype = Object.create( Material.prototype );
  LineDashedMaterial.prototype.constructor = LineDashedMaterial;

  LineDashedMaterial.prototype.isLineDashedMaterial = true;

  LineDashedMaterial.prototype.copy = function ( source ) {

  	Material.prototype.copy.call( this, source );

  	this.color.copy( source.color );

  	this.linewidth = source.linewidth;

  	this.scale = source.scale;
  	this.dashSize = source.dashSize;
  	this.gapSize = source.gapSize;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  exports.Cache = {

  	enabled: false,

  	files: {},

  	add: function ( key, file ) {

  		if ( this.enabled === false ) return;

  		// console.log( 'THREE.Cache', 'Adding key:', key );

  		this.files[ key ] = file;

  	},

  	get: function ( key ) {

  		if ( this.enabled === false ) return;

  		// console.log( 'THREE.Cache', 'Checking key:', key );

  		return this.files[ key ];

  	},

  	remove: function ( key ) {

  		delete this.files[ key ];

  	},

  	clear: function () {

  		this.files = {};

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function LoadingManager( onLoad, onProgress, onError ) {

  	var scope = this;

  	var isLoading = false, itemsLoaded = 0, itemsTotal = 0;

  	this.onStart = undefined;
  	this.onLoad = onLoad;
  	this.onProgress = onProgress;
  	this.onError = onError;

  	this.itemStart = function ( url ) {

  		itemsTotal ++;

  		if ( isLoading === false ) {

  			if ( scope.onStart !== undefined ) {

  				scope.onStart( url, itemsLoaded, itemsTotal );

  			}

  		}

  		isLoading = true;

  	};

  	this.itemEnd = function ( url ) {

  		itemsLoaded ++;

  		if ( scope.onProgress !== undefined ) {

  			scope.onProgress( url, itemsLoaded, itemsTotal );

  		}

  		if ( itemsLoaded === itemsTotal ) {

  			isLoading = false;

  			if ( scope.onLoad !== undefined ) {

  				scope.onLoad();

  			}

  		}

  	};

  	this.itemError = function ( url ) {

  		if ( scope.onError !== undefined ) {

  			scope.onError( url );

  		}

  	};

  };

  exports.DefaultLoadingManager = new LoadingManager();

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function XHRLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( XHRLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		if ( this.path !== undefined ) url = this.path + url;

  		var scope = this;

  		var cached = exports.Cache.get( url );

  		if ( cached !== undefined ) {

  			scope.manager.itemStart( url );

  			setTimeout( function () {

  				if ( onLoad ) onLoad( cached );

  				scope.manager.itemEnd( url );

  			}, 0 );

  			return cached;

  		}

  		var request = new XMLHttpRequest();
  		request.overrideMimeType( 'text/plain' );
  		request.open( 'GET', url, true );

  		request.addEventListener( 'load', function ( event ) {

  			var response = event.target.response;

  			exports.Cache.add( url, response );

  			if ( this.status === 200 ) {

  				if ( onLoad ) onLoad( response );

  				scope.manager.itemEnd( url );

  			} else if ( this.status === 0 ) {

  				// Some browsers return HTTP Status 0 when using non-http protocol
  				// e.g. 'file://' or 'data://'. Handle as success.

  				console.warn( 'THREE.XHRLoader: HTTP Status 0 received.' );

  				if ( onLoad ) onLoad( response );

  				scope.manager.itemEnd( url );

  			} else {

  				if ( onError ) onError( event );

  				scope.manager.itemError( url );

  			}

  		}, false );

  		if ( onProgress !== undefined ) {

  			request.addEventListener( 'progress', function ( event ) {

  				onProgress( event );

  			}, false );

  		}

  		request.addEventListener( 'error', function ( event ) {

  			if ( onError ) onError( event );

  			scope.manager.itemError( url );

  		}, false );

  		if ( this.responseType !== undefined ) request.responseType = this.responseType;
  		if ( this.withCredentials !== undefined ) request.withCredentials = this.withCredentials;

  		request.send( null );

  		scope.manager.itemStart( url );

  		return request;

  	},

  	setPath: function ( value ) {

  		this.path = value;
  		return this;

  	},

  	setResponseType: function ( value ) {

  		this.responseType = value;
  		return this;

  	},

  	setWithCredentials: function ( value ) {

  		this.withCredentials = value;
  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   *
   * Abstract Base class to block based textures loader (dds, pvr, ...)
   */

  function CompressedTextureLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  	// override in sub classes
  	this._parser = null;

  };

  Object.assign( CompressedTextureLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var images = [];

  		var texture = new CompressedTexture();
  		texture.image = images;

  		var loader = new XHRLoader( this.manager );
  		loader.setPath( this.path );
  		loader.setResponseType( 'arraybuffer' );

  		function loadTexture( i ) {

  			loader.load( url[ i ], function ( buffer ) {

  				var texDatas = scope._parser( buffer, true );

  				images[ i ] = {
  					width: texDatas.width,
  					height: texDatas.height,
  					format: texDatas.format,
  					mipmaps: texDatas.mipmaps
  				};

  				loaded += 1;

  				if ( loaded === 6 ) {

  					if ( texDatas.mipmapCount === 1 )
  						texture.minFilter = LinearFilter;

  					texture.format = texDatas.format;
  					texture.needsUpdate = true;

  					if ( onLoad ) onLoad( texture );

  				}

  			}, onProgress, onError );

  		}

  		if ( Array.isArray( url ) ) {

  			var loaded = 0;

  			for ( var i = 0, il = url.length; i < il; ++ i ) {

  				loadTexture( i );

  			}

  		} else {

  			// compressed cubemap texture stored in a single DDS file

  			loader.load( url, function ( buffer ) {

  				var texDatas = scope._parser( buffer, true );

  				if ( texDatas.isCubemap ) {

  					var faces = texDatas.mipmaps.length / texDatas.mipmapCount;

  					for ( var f = 0; f < faces; f ++ ) {

  						images[ f ] = { mipmaps : [] };

  						for ( var i = 0; i < texDatas.mipmapCount; i ++ ) {

  							images[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );
  							images[ f ].format = texDatas.format;
  							images[ f ].width = texDatas.width;
  							images[ f ].height = texDatas.height;

  						}

  					}

  				} else {

  					texture.image.width = texDatas.width;
  					texture.image.height = texDatas.height;
  					texture.mipmaps = texDatas.mipmaps;

  				}

  				if ( texDatas.mipmapCount === 1 ) {

  					texture.minFilter = LinearFilter;

  				}

  				texture.format = texDatas.format;
  				texture.needsUpdate = true;

  				if ( onLoad ) onLoad( texture );

  			}, onProgress, onError );

  		}

  		return texture;

  	},

  	setPath: function ( value ) {

  		this.path = value;
  		return this;

  	}

  } );

  /**
   * @author Nikos M. / https://github.com/foo123/
   *
   * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)
   */

  var DataTextureLoader = BinaryTextureLoader;
  function BinaryTextureLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  	// override in sub classes
  	this._parser = null;

  };

  Object.assign( BinaryTextureLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var texture = new DataTexture();

  		var loader = new XHRLoader( this.manager );
  		loader.setResponseType( 'arraybuffer' );

  		loader.load( url, function ( buffer ) {

  			var texData = scope._parser( buffer );

  			if ( ! texData ) return;

  			if ( undefined !== texData.image ) {

  				texture.image = texData.image;

  			} else if ( undefined !== texData.data ) {

  				texture.image.width = texData.width;
  				texture.image.height = texData.height;
  				texture.image.data = texData.data;

  			}

  			texture.wrapS = undefined !== texData.wrapS ? texData.wrapS : ClampToEdgeWrapping;
  			texture.wrapT = undefined !== texData.wrapT ? texData.wrapT : ClampToEdgeWrapping;

  			texture.magFilter = undefined !== texData.magFilter ? texData.magFilter : LinearFilter;
  			texture.minFilter = undefined !== texData.minFilter ? texData.minFilter : LinearMipMapLinearFilter;

  			texture.anisotropy = undefined !== texData.anisotropy ? texData.anisotropy : 1;

  			if ( undefined !== texData.format ) {

  				texture.format = texData.format;

  			}
  			if ( undefined !== texData.type ) {

  				texture.type = texData.type;

  			}

  			if ( undefined !== texData.mipmaps ) {

  				texture.mipmaps = texData.mipmaps;

  			}

  			if ( 1 === texData.mipmapCount ) {

  				texture.minFilter = LinearFilter;

  			}

  			texture.needsUpdate = true;

  			if ( onLoad ) onLoad( texture, texData );

  		}, onProgress, onError );


  		return texture;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function ImageLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( ImageLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var image = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'img' );
  		image.onload = function () {

  			URL.revokeObjectURL( image.src );

  			if ( onLoad ) onLoad( image );

  			scope.manager.itemEnd( url );

  		};

  		if ( url.indexOf( 'data:' ) === 0 ) {

  			image.src = url;

  		} else {

  			var loader = new XHRLoader();
  			loader.setPath( this.path );
  			loader.setResponseType( 'blob' );
  			loader.setWithCredentials( this.withCredentials );
  			loader.load( url, function ( blob ) {

  				image.src = URL.createObjectURL( blob );

  			}, onProgress, onError );

  		}

  		scope.manager.itemStart( url );

  		return image;

  	},

  	setCrossOrigin: function ( value ) {

  		this.crossOrigin = value;
  		return this;

  	},

  	setWithCredentials: function ( value ) {

  		this.withCredentials = value;
  		return this;

  	},

  	setPath: function ( value ) {

  		this.path = value;
  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function CubeTextureLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( CubeTextureLoader.prototype, {

  	load: function ( urls, onLoad, onProgress, onError ) {

  		var texture = new CubeTexture();

  		var loader = new ImageLoader( this.manager );
  		loader.setCrossOrigin( this.crossOrigin );
  		loader.setPath( this.path );

  		var loaded = 0;

  		function loadTexture( i ) {

  			loader.load( urls[ i ], function ( image ) {

  				texture.images[ i ] = image;

  				loaded ++;

  				if ( loaded === 6 ) {

  					texture.needsUpdate = true;

  					if ( onLoad ) onLoad( texture );

  				}

  			}, undefined, onError );

  		}

  		for ( var i = 0; i < urls.length; ++ i ) {

  			loadTexture( i );

  		}

  		return texture;

  	},

  	setCrossOrigin: function ( value ) {

  		this.crossOrigin = value;
  		return this;

  	},

  	setPath: function ( value ) {

  		this.path = value;
  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function TextureLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( TextureLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var texture = new Texture();

  		var loader = new ImageLoader( this.manager );
  		loader.setCrossOrigin( this.crossOrigin );
  		loader.setWithCredentials( this.withCredentials );
  		loader.setPath( this.path );
  		loader.load( url, function ( image ) {

  			// JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.
  			var isJPEG = url.search( /\.(jpg|jpeg)$/ ) > 0 || url.search( /^data\:image\/jpeg/ ) === 0;

  			texture.format = isJPEG ? RGBFormat : RGBAFormat;
  			texture.image = image;
  			texture.needsUpdate = true;

  			if ( onLoad !== undefined ) {

  				onLoad( texture );

  			}

  		}, onProgress, onError );

  		return texture;

  	},

  	setCrossOrigin: function ( value ) {

  		this.crossOrigin = value;
  		return this;

  	},

  	setWithCredentials: function ( value ) {

  		this.withCredentials = value;
  		return this;

  	},

  	setPath: function ( value ) {

  		this.path = value;
  		return this;

  	}



  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function Light( color, intensity ) {

  	Object3D.call( this );

  	this.type = 'Light';

  	this.color = new Color( color );
  	this.intensity = intensity !== undefined ? intensity : 1;

  	this.receiveShadow = undefined;

  };

  Light.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Light,

  	isLight: true,

  	copy: function ( source ) {

  		Object3D.prototype.copy.call( this, source );

  		this.color.copy( source.color );
  		this.intensity = source.intensity;

  		return this;

  	},

  	toJSON: function ( meta ) {

  		var data = Object3D.prototype.toJSON.call( this, meta );

  		data.object.color = this.color.getHex();
  		data.object.intensity = this.intensity;

  		if ( this.groundColor !== undefined ) data.object.groundColor = this.groundColor.getHex();

  		if ( this.distance !== undefined ) data.object.distance = this.distance;
  		if ( this.angle !== undefined ) data.object.angle = this.angle;
  		if ( this.decay !== undefined ) data.object.decay = this.decay;
  		if ( this.penumbra !== undefined ) data.object.penumbra = this.penumbra;

  		return data;

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function HemisphereLight( skyColor, groundColor, intensity ) {

  	Light.call( this, skyColor, intensity );

  	this.type = 'HemisphereLight';

  	this.castShadow = undefined;

  	this.position.copy( Object3D.DefaultUp );
  	this.updateMatrix();

  	this.groundColor = new Color( groundColor );

  };

  HemisphereLight.prototype = Object.assign( Object.create( Light.prototype ), {

  	constructor: HemisphereLight,

  	isHemisphereLight: true,

  	copy: function ( source ) {

  		Light.prototype.copy.call( this, source );

  		this.groundColor.copy( source.groundColor );

  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function LightShadow( camera ) {

  	this.camera = camera;

  	this.bias = 0;
  	this.radius = 1;

  	this.mapSize = new Vector2( 512, 512 );

  	this.map = null;
  	this.matrix = new Matrix4();

  };

  Object.assign( LightShadow.prototype, {

  	copy: function ( source ) {

  		this.camera = source.camera.clone();

  		this.bias = source.bias;
  		this.radius = source.radius;

  		this.mapSize.copy( source.mapSize );

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function SpotLightShadow() {

  	LightShadow.call( this, new PerspectiveCamera( 50, 1, 0.5, 500 ) );

  };

  SpotLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

  	constructor: SpotLightShadow,

  	isSpotLightShadow: true,

  	update: function ( light ) {

  		var fov = exports.Math.RAD2DEG * 2 * light.angle;
  		var aspect = this.mapSize.width / this.mapSize.height;
  		var far = light.distance || 500;

  		var camera = this.camera;

  		if ( fov !== camera.fov || aspect !== camera.aspect || far !== camera.far ) {

  			camera.fov = fov;
  			camera.aspect = aspect;
  			camera.far = far;
  			camera.updateProjectionMatrix();

  		}

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function SpotLight( color, intensity, distance, angle, penumbra, decay ) {

  	Light.call( this, color, intensity );

  	this.type = 'SpotLight';

  	this.position.copy( Object3D.DefaultUp );
  	this.updateMatrix();

  	this.target = new Object3D();

  	Object.defineProperty( this, 'power', {
  		get: function () {
  			// intensity = power per solid angle.
  			// ref: equation (17) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
  			return this.intensity * Math.PI;
  		},
  		set: function ( power ) {
  			// intensity = power per solid angle.
  			// ref: equation (17) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
  			this.intensity = power / Math.PI;
  		}
  	} );

  	this.distance = ( distance !== undefined ) ? distance : 0;
  	this.angle = ( angle !== undefined ) ? angle : Math.PI / 3;
  	this.penumbra = ( penumbra !== undefined ) ? penumbra : 0;
  	this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

  	this.shadow = new SpotLightShadow();

  };

  SpotLight.prototype = Object.assign( Object.create( Light.prototype ), {

  	constructor: SpotLight,

  	isSpotLight: true,

  	copy: function ( source ) {

  		Light.prototype.copy.call( this, source );

  		this.distance = source.distance;
  		this.angle = source.angle;
  		this.penumbra = source.penumbra;
  		this.decay = source.decay;

  		this.target = source.target.clone();

  		this.shadow = source.shadow.clone();

  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */


  function PointLight( color, intensity, distance, decay ) {

  	Light.call( this, color, intensity );

  	this.type = 'PointLight';

  	Object.defineProperty( this, 'power', {
  		get: function () {
  			// intensity = power per solid angle.
  			// ref: equation (15) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
  			return this.intensity * 4 * Math.PI;

  		},
  		set: function ( power ) {
  			// intensity = power per solid angle.
  			// ref: equation (15) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
  			this.intensity = power / ( 4 * Math.PI );
  		}
  	} );

  	this.distance = ( distance !== undefined ) ? distance : 0;
  	this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

  	this.shadow = new LightShadow( new PerspectiveCamera( 90, 1, 0.5, 500 ) );

  };

  PointLight.prototype = Object.assign( Object.create( Light.prototype ), {

  	constructor: PointLight,

  	isPointLight: true,

  	copy: function ( source ) {

  		Light.prototype.copy.call( this, source );

  		this.distance = source.distance;
  		this.decay = source.decay;

  		this.shadow = source.shadow.clone();

  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function DirectionalLightShadow( light ) {

  	LightShadow.call( this, new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );

  };

  DirectionalLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

  	constructor: DirectionalLightShadow

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function DirectionalLight( color, intensity ) {

  	Light.call( this, color, intensity );

  	this.type = 'DirectionalLight';

  	this.position.copy( Object3D.DefaultUp );
  	this.updateMatrix();

  	this.target = new Object3D();

  	this.shadow = new DirectionalLightShadow();

  };

  DirectionalLight.prototype = Object.assign( Object.create( Light.prototype ), {

  	constructor: DirectionalLight,

  	isDirectionalLight: true,

  	copy: function ( source ) {

  		Light.prototype.copy.call( this, source );

  		this.target = source.target.clone();

  		this.shadow = source.shadow.clone();

  		return this;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function AmbientLight( color, intensity ) {

  	Light.call( this, color, intensity );

  	this.type = 'AmbientLight';

  	this.castShadow = undefined;

  };

  AmbientLight.prototype = Object.assign( Object.create( Light.prototype ), {

  	constructor: AmbientLight,

  	isAmbientLight: true,

  } );

  /**
   * @author tschw
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   */

  exports.AnimationUtils = {

  	// same as Array.prototype.slice, but also works on typed arrays
  	arraySlice: function( array, from, to ) {

  		if ( exports.AnimationUtils.isTypedArray( array ) ) {

  			return new array.constructor( array.subarray( from, to ) );

  		}

  		return array.slice( from, to );

  	},

  	// converts an array to a specific type
  	convertArray: function( array, type, forceClone ) {

  		if ( ! array || // let 'undefined' and 'null' pass
  				! forceClone && array.constructor === type ) return array;

  		if ( typeof type.BYTES_PER_ELEMENT === 'number' ) {

  			return new type( array ); // create typed array

  		}

  		return Array.prototype.slice.call( array ); // create Array

  	},

  	isTypedArray: function( object ) {

  		return ArrayBuffer.isView( object ) &&
  				! ( object instanceof DataView );

  	},

  	// returns an array by which times and values can be sorted
  	getKeyframeOrder: function( times ) {

  		function compareTime( i, j ) {

  			return times[ i ] - times[ j ];

  		}

  		var n = times.length;
  		var result = new Array( n );
  		for ( var i = 0; i !== n; ++ i ) result[ i ] = i;

  		result.sort( compareTime );

  		return result;

  	},

  	// uses the array previously returned by 'getKeyframeOrder' to sort data
  	sortedArray: function( values, stride, order ) {

  		var nValues = values.length;
  		var result = new values.constructor( nValues );

  		for ( var i = 0, dstOffset = 0; dstOffset !== nValues; ++ i ) {

  			var srcOffset = order[ i ] * stride;

  			for ( var j = 0; j !== stride; ++ j ) {

  				result[ dstOffset ++ ] = values[ srcOffset + j ];

  			}

  		}

  		return result;

  	},

  	// function for parsing AOS keyframe formats
  	flattenJSON: function( jsonKeys, times, values, valuePropertyName ) {

  		var i = 1, key = jsonKeys[ 0 ];

  		while ( key !== undefined && key[ valuePropertyName ] === undefined ) {

  			key = jsonKeys[ i ++ ];

  		}

  		if ( key === undefined ) return; // no data

  		var value = key[ valuePropertyName ];
  		if ( value === undefined ) return; // no data

  		if ( Array.isArray( value ) ) {

  			do {

  				value = key[ valuePropertyName ];

  				if ( value !== undefined ) {

  					times.push( key.time );
  					values.push.apply( values, value ); // push all elements

  				}

  				key = jsonKeys[ i ++ ];

  			} while ( key !== undefined );

  		} else if ( value.toArray !== undefined ) {
  			// ...assume THREE.Math-ish

  			do {

  				value = key[ valuePropertyName ];

  				if ( value !== undefined ) {

  					times.push( key.time );
  					value.toArray( values, values.length );

  				}

  				key = jsonKeys[ i ++ ];

  			} while ( key !== undefined );

  		} else {
  			// otherwise push as-is

  			do {

  				value = key[ valuePropertyName ];

  				if ( value !== undefined ) {

  					times.push( key.time );
  					values.push( value );

  				}

  				key = jsonKeys[ i ++ ];

  			} while ( key !== undefined );

  		}

  	}

  };

  /**
   * Abstract base class of interpolants over parametric samples.
   *
   * The parameter domain is one dimensional, typically the time or a path
   * along a curve defined by the data.
   *
   * The sample values can have any dimensionality and derived classes may
   * apply special interpretations to the data.
   *
   * This class provides the interval seek in a Template Method, deferring
   * the actual interpolation to derived classes.
   *
   * Time complexity is O(1) for linear access crossing at most two points
   * and O(log N) for random access, where N is the number of positions.
   *
   * References:
   *
   * 		http://www.oodesign.com/template-method-pattern.html
   *
   * @author tschw
   */

  function Interpolant(
  		parameterPositions, sampleValues, sampleSize, resultBuffer ) {

  	this.parameterPositions = parameterPositions;
  	this._cachedIndex = 0;

  	this.resultBuffer = resultBuffer !== undefined ?
  			resultBuffer : new sampleValues.constructor( sampleSize );
  	this.sampleValues = sampleValues;
  	this.valueSize = sampleSize;

  };

  Interpolant.prototype = {

  	constructor: Interpolant,

  	evaluate: function( t ) {

  		var pp = this.parameterPositions,
  			i1 = this._cachedIndex,

  			t1 = pp[   i1   ],
  			t0 = pp[ i1 - 1 ];

  		validate_interval: {

  			seek: {

  				var right;

  				linear_scan: {
  //- See http://jsperf.com/comparison-to-undefined/3
  //- slower code:
  //-
  //- 				if ( t >= t1 || t1 === undefined ) {
  					forward_scan: if ( ! ( t < t1 ) ) {

  						for ( var giveUpAt = i1 + 2; ;) {

  							if ( t1 === undefined ) {

  								if ( t < t0 ) break forward_scan;

  								// after end

  								i1 = pp.length;
  								this._cachedIndex = i1;
  								return this.afterEnd_( i1 - 1, t, t0 );

  							}

  							if ( i1 === giveUpAt ) break; // this loop

  							t0 = t1;
  							t1 = pp[ ++ i1 ];

  							if ( t < t1 ) {

  								// we have arrived at the sought interval
  								break seek;

  							}

  						}

  						// prepare binary search on the right side of the index
  						right = pp.length;
  						break linear_scan;

  					}

  //- slower code:
  //-					if ( t < t0 || t0 === undefined ) {
  					if ( ! ( t >= t0 ) ) {

  						// looping?

  						var t1global = pp[ 1 ];

  						if ( t < t1global ) {

  							i1 = 2; // + 1, using the scan for the details
  							t0 = t1global;

  						}

  						// linear reverse scan

  						for ( var giveUpAt = i1 - 2; ;) {

  							if ( t0 === undefined ) {

  								// before start

  								this._cachedIndex = 0;
  								return this.beforeStart_( 0, t, t1 );

  							}

  							if ( i1 === giveUpAt ) break; // this loop

  							t1 = t0;
  							t0 = pp[ -- i1 - 1 ];

  							if ( t >= t0 ) {

  								// we have arrived at the sought interval
  								break seek;

  							}

  						}

  						// prepare binary search on the left side of the index
  						right = i1;
  						i1 = 0;
  						break linear_scan;

  					}

  					// the interval is valid

  					break validate_interval;

  				} // linear scan

  				// binary search

  				while ( i1 < right ) {

  					var mid = ( i1 + right ) >>> 1;

  					if ( t < pp[ mid ] ) {

  						right = mid;

  					} else {

  						i1 = mid + 1;

  					}

  				}

  				t1 = pp[   i1   ];
  				t0 = pp[ i1 - 1 ];

  				// check boundary cases, again

  				if ( t0 === undefined ) {

  					this._cachedIndex = 0;
  					return this.beforeStart_( 0, t, t1 );

  				}

  				if ( t1 === undefined ) {

  					i1 = pp.length;
  					this._cachedIndex = i1;
  					return this.afterEnd_( i1 - 1, t0, t );

  				}

  			} // seek

  			this._cachedIndex = i1;

  			this.intervalChanged_( i1, t0, t1 );

  		} // validate_interval

  		return this.interpolate_( i1, t0, t, t1 );

  	},

  	settings: null, // optional, subclass-specific settings structure
  	// Note: The indirection allows central control of many interpolants.

  	// --- Protected interface

  	DefaultSettings_: {},

  	getSettings_: function() {

  		return this.settings || this.DefaultSettings_;

  	},

  	copySampleValue_: function( index ) {

  		// copies a sample value to the result buffer

  		var result = this.resultBuffer,
  			values = this.sampleValues,
  			stride = this.valueSize,
  			offset = index * stride;

  		for ( var i = 0; i !== stride; ++ i ) {

  			result[ i ] = values[ offset + i ];

  		}

  		return result;

  	},

  	// Template methods for derived classes:

  	interpolate_: function( i1, t0, t, t1 ) {

  		throw new Error( "call to abstract method" );
  		// implementations shall return this.resultBuffer

  	},

  	intervalChanged_: function( i1, t0, t1 ) {

  		// empty

  	}

  };

  Object.assign( Interpolant.prototype, {

  	beforeStart_: //( 0, t, t0 ), returns this.resultBuffer
  		Interpolant.prototype.copySampleValue_,

  	afterEnd_: //( N-1, tN-1, t ), returns this.resultBuffer
  		Interpolant.prototype.copySampleValue_

  } );

  /**
   * Fast and simple cubic spline interpolant.
   *
   * It was derived from a Hermitian construction setting the first derivative
   * at each sample position to the linear slope between neighboring positions
   * over their parameter interval.
   *
   * @author tschw
   */

  function CubicInterpolant(
  		parameterPositions, sampleValues, sampleSize, resultBuffer ) {

  	Interpolant.call(
  			this, parameterPositions, sampleValues, sampleSize, resultBuffer );

  	this._weightPrev = -0;
  	this._offsetPrev = -0;
  	this._weightNext = -0;
  	this._offsetNext = -0;

  };

  CubicInterpolant.prototype =
  		Object.assign( Object.create( Interpolant.prototype ), {

  	constructor: CubicInterpolant,

  	DefaultSettings_: {

  		endingStart: 	ZeroCurvatureEnding,
  		endingEnd:		ZeroCurvatureEnding

  	},

  	intervalChanged_: function( i1, t0, t1 ) {

  		var pp = this.parameterPositions,
  			iPrev = i1 - 2,
  			iNext = i1 + 1,

  			tPrev = pp[ iPrev ],
  			tNext = pp[ iNext ];

  		if ( tPrev === undefined ) {

  			switch ( this.getSettings_().endingStart ) {

  				case ZeroSlopeEnding:

  					// f'(t0) = 0
  					iPrev = i1;
  					tPrev = 2 * t0 - t1;

  					break;

  				case WrapAroundEnding:

  					// use the other end of the curve
  					iPrev = pp.length - 2;
  					tPrev = t0 + pp[ iPrev ] - pp[ iPrev + 1 ];

  					break;

  				default: // ZeroCurvatureEnding

  					// f''(t0) = 0 a.k.a. Natural Spline
  					iPrev = i1;
  					tPrev = t1;

  			}

  		}

  		if ( tNext === undefined ) {

  			switch ( this.getSettings_().endingEnd ) {

  				case ZeroSlopeEnding:

  					// f'(tN) = 0
  					iNext = i1;
  					tNext = 2 * t1 - t0;

  					break;

  				case WrapAroundEnding:

  					// use the other end of the curve
  					iNext = 1;
  					tNext = t1 + pp[ 1 ] - pp[ 0 ];

  					break;

  				default: // ZeroCurvatureEnding

  					// f''(tN) = 0, a.k.a. Natural Spline
  					iNext = i1 - 1;
  					tNext = t0;

  			}

  		}

  		var halfDt = ( t1 - t0 ) * 0.5,
  			stride = this.valueSize;

  		this._weightPrev = halfDt / ( t0 - tPrev );
  		this._weightNext = halfDt / ( tNext - t1 );
  		this._offsetPrev = iPrev * stride;
  		this._offsetNext = iNext * stride;

  	},

  	interpolate_: function( i1, t0, t, t1 ) {

  		var result = this.resultBuffer,
  			values = this.sampleValues,
  			stride = this.valueSize,

  			o1 = i1 * stride,		o0 = o1 - stride,
  			oP = this._offsetPrev, 	oN = this._offsetNext,
  			wP = this._weightPrev,	wN = this._weightNext,

  			p = ( t - t0 ) / ( t1 - t0 ),
  			pp = p * p,
  			ppp = pp * p;

  		// evaluate polynomials

  		var sP =     - wP   * ppp   +         2 * wP    * pp    -          wP   * p;
  		var s0 = ( 1 + wP ) * ppp   + (-1.5 - 2 * wP )  * pp    + ( -0.5 + wP ) * p     + 1;
  		var s1 = (-1 - wN ) * ppp   + ( 1.5 +   wN   )  * pp    +    0.5        * p;
  		var sN =       wN   * ppp   -           wN      * pp;

  		// combine data linearly

  		for ( var i = 0; i !== stride; ++ i ) {

  			result[ i ] =
  					sP * values[ oP + i ] +
  					s0 * values[ o0 + i ] +
  					s1 * values[ o1 + i ] +
  					sN * values[ oN + i ];

  		}

  		return result;

  	}

  } );

  /**
   * @author tschw
   */

  function LinearInterpolant(
  		parameterPositions, sampleValues, sampleSize, resultBuffer ) {

  	Interpolant.call(
  			this, parameterPositions, sampleValues, sampleSize, resultBuffer );

  };

  LinearInterpolant.prototype =
  		Object.assign( Object.create( Interpolant.prototype ), {

  	constructor: LinearInterpolant,

  	interpolate_: function( i1, t0, t, t1 ) {

  		var result = this.resultBuffer,
  			values = this.sampleValues,
  			stride = this.valueSize,

  			offset1 = i1 * stride,
  			offset0 = offset1 - stride,

  			weight1 = ( t - t0 ) / ( t1 - t0 ),
  			weight0 = 1 - weight1;

  		for ( var i = 0; i !== stride; ++ i ) {

  			result[ i ] =
  					values[ offset0 + i ] * weight0 +
  					values[ offset1 + i ] * weight1;

  		}

  		return result;

  	}

  } );

  /**
   *
   * Interpolant that evaluates to the sample value at the position preceeding
   * the parameter.
   *
   * @author tschw
   */

  function DiscreteInterpolant(
  		parameterPositions, sampleValues, sampleSize, resultBuffer ) {

  	Interpolant.call(
  			this, parameterPositions, sampleValues, sampleSize, resultBuffer );

  };

  DiscreteInterpolant.prototype =
  		Object.assign( Object.create( Interpolant.prototype ), {

  	constructor: DiscreteInterpolant,

  	interpolate_: function( i1, t0, t, t1 ) {

  		return this.copySampleValue_( i1 - 1 );

  	}

  } );

  var KeyframeTrackPrototype;

  KeyframeTrackPrototype = {

  	TimeBufferType: Float32Array,
  	ValueBufferType: Float32Array,

  	DefaultInterpolation: InterpolateLinear,

  	InterpolantFactoryMethodDiscrete: function( result ) {

  		return new DiscreteInterpolant(
  				this.times, this.values, this.getValueSize(), result );

  	},

  	InterpolantFactoryMethodLinear: function( result ) {

  		return new LinearInterpolant(
  				this.times, this.values, this.getValueSize(), result );

  	},

  	InterpolantFactoryMethodSmooth: function( result ) {

  		return new CubicInterpolant(
  				this.times, this.values, this.getValueSize(), result );

  	},

  	setInterpolation: function( interpolation ) {

  		var factoryMethod;

  		switch ( interpolation ) {

  			case InterpolateDiscrete:

  				factoryMethod = this.InterpolantFactoryMethodDiscrete;

  				break;

  			case InterpolateLinear:

  				factoryMethod = this.InterpolantFactoryMethodLinear;

  				break;

  			case InterpolateSmooth:

  				factoryMethod = this.InterpolantFactoryMethodSmooth;

  				break;

  		}

  		if ( factoryMethod === undefined ) {

  			var message = "unsupported interpolation for " +
  					this.ValueTypeName + " keyframe track named " + this.name;

  			if ( this.createInterpolant === undefined ) {

  				// fall back to default, unless the default itself is messed up
  				if ( interpolation !== this.DefaultInterpolation ) {

  					this.setInterpolation( this.DefaultInterpolation );

  				} else {

  					throw new Error( message ); // fatal, in this case

  				}

  			}

  			console.warn( message );
  			return;

  		}

  		this.createInterpolant = factoryMethod;

  	},

  	getInterpolation: function() {

  		switch ( this.createInterpolant ) {

  			case this.InterpolantFactoryMethodDiscrete:

  				return InterpolateDiscrete;

  			case this.InterpolantFactoryMethodLinear:

  				return InterpolateLinear;

  			case this.InterpolantFactoryMethodSmooth:

  				return InterpolateSmooth;

  		}

  	},

  	getValueSize: function() {

  		return this.values.length / this.times.length;

  	},

  	// move all keyframes either forwards or backwards in time
  	shift: function( timeOffset ) {

  		if( timeOffset !== 0.0 ) {

  			var times = this.times;

  			for( var i = 0, n = times.length; i !== n; ++ i ) {

  				times[ i ] += timeOffset;

  			}

  		}

  		return this;

  	},

  	// scale all keyframe times by a factor (useful for frame <-> seconds conversions)
  	scale: function( timeScale ) {

  		if( timeScale !== 1.0 ) {

  			var times = this.times;

  			for( var i = 0, n = times.length; i !== n; ++ i ) {

  				times[ i ] *= timeScale;

  			}

  		}

  		return this;

  	},

  	// removes keyframes before and after animation without changing any values within the range [startTime, endTime].
  	// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values
  	trim: function( startTime, endTime ) {

  		var times = this.times,
  			nKeys = times.length,
  			from = 0,
  			to = nKeys - 1;

  		while ( from !== nKeys && times[ from ] < startTime ) ++ from;
  		while ( to !== -1 && times[ to ] > endTime ) -- to;

  		++ to; // inclusive -> exclusive bound

  		if( from !== 0 || to !== nKeys ) {

  			// empty tracks are forbidden, so keep at least one keyframe
  			if ( from >= to ) to = Math.max( to , 1 ), from = to - 1;

  			var stride = this.getValueSize();
  			this.times = exports.AnimationUtils.arraySlice( times, from, to );
  			this.values = exports.AnimationUtils.
  					arraySlice( this.values, from * stride, to * stride );

  		}

  		return this;

  	},

  	// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable
  	validate: function() {

  		var valid = true;

  		var valueSize = this.getValueSize();
  		if ( valueSize - Math.floor( valueSize ) !== 0 ) {

  			console.error( "invalid value size in track", this );
  			valid = false;

  		}

  		var times = this.times,
  			values = this.values,

  			nKeys = times.length;

  		if( nKeys === 0 ) {

  			console.error( "track is empty", this );
  			valid = false;

  		}

  		var prevTime = null;

  		for( var i = 0; i !== nKeys; i ++ ) {

  			var currTime = times[ i ];

  			if ( typeof currTime === 'number' && isNaN( currTime ) ) {

  				console.error( "time is not a valid number", this, i, currTime );
  				valid = false;
  				break;

  			}

  			if( prevTime !== null && prevTime > currTime ) {

  				console.error( "out of order keys", this, i, currTime, prevTime );
  				valid = false;
  				break;

  			}

  			prevTime = currTime;

  		}

  		if ( values !== undefined ) {

  			if ( exports.AnimationUtils.isTypedArray( values ) ) {

  				for ( var i = 0, n = values.length; i !== n; ++ i ) {

  					var value = values[ i ];

  					if ( isNaN( value ) ) {

  						console.error( "value is not a valid number", this, i, value );
  						valid = false;
  						break;

  					}

  				}

  			}

  		}

  		return valid;

  	},

  	// removes equivalent sequential keys as common in morph target sequences
  	// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)
  	optimize: function() {

  		var times = this.times,
  			values = this.values,
  			stride = this.getValueSize(),

  			writeIndex = 1;

  		for( var i = 1, n = times.length - 1; i <= n; ++ i ) {

  			var keep = false;

  			var time = times[ i ];
  			var timeNext = times[ i + 1 ];

  			// remove adjacent keyframes scheduled at the same time

  			if ( time !== timeNext && ( i !== 1 || time !== time[ 0 ] ) ) {

  				// remove unnecessary keyframes same as their neighbors
  				var offset = i * stride,
  					offsetP = offset - stride,
  					offsetN = offset + stride;

  				for ( var j = 0; j !== stride; ++ j ) {

  					var value = values[ offset + j ];

  					if ( value !== values[ offsetP + j ] ||
  							value !== values[ offsetN + j ] ) {

  						keep = true;
  						break;

  					}

  				}

  			}

  			// in-place compaction

  			if ( keep ) {

  				if ( i !== writeIndex ) {

  					times[ writeIndex ] = times[ i ];

  					var readOffset = i * stride,
  						writeOffset = writeIndex * stride;

  					for ( var j = 0; j !== stride; ++ j ) {

  						values[ writeOffset + j ] = values[ readOffset + j ];

  					}


  				}

  				++ writeIndex;

  			}

  		}

  		if ( writeIndex !== times.length ) {

  			this.times = exports.AnimationUtils.arraySlice( times, 0, writeIndex );
  			this.values = exports.AnimationUtils.arraySlice( values, 0, writeIndex * stride );

  		}

  		return this;

  	}

  }

  function KeyframeTrackConstructor( name, times, values, interpolation ) {

  	if( name === undefined ) throw new Error( "track name is undefined" );

  	if( times === undefined || times.length === 0 ) {

  		throw new Error( "no keyframes in track named " + name );

  	}

  	this.name = name;

  	this.times = exports.AnimationUtils.convertArray( times, this.TimeBufferType );
  	this.values = exports.AnimationUtils.convertArray( values, this.ValueBufferType );

  	this.setInterpolation( interpolation || this.DefaultInterpolation );

  	this.validate();
  	this.optimize();

  }

  /**
   *
   * A Track of vectored keyframe values.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function VectorKeyframeTrack( name, times, values, interpolation ) {

  	KeyframeTrackConstructor.call( this, name, times, values, interpolation );

  };

  VectorKeyframeTrack.prototype =
  		Object.assign( Object.create( KeyframeTrackPrototype ), {

  	constructor: VectorKeyframeTrack,

  	ValueTypeName: 'vector'

  	// ValueBufferType is inherited

  	// DefaultInterpolation is inherited

  } );

  /**
   * Spherical linear unit quaternion interpolant.
   *
   * @author tschw
   */

  function QuaternionLinearInterpolant(
  		parameterPositions, sampleValues, sampleSize, resultBuffer ) {

  	Interpolant.call(
  			this, parameterPositions, sampleValues, sampleSize, resultBuffer );

  };

  QuaternionLinearInterpolant.prototype =
  		Object.assign( Object.create( Interpolant.prototype ), {

  	constructor: QuaternionLinearInterpolant,

  	interpolate_: function( i1, t0, t, t1 ) {

  		var result = this.resultBuffer,
  			values = this.sampleValues,
  			stride = this.valueSize,

  			offset = i1 * stride,

  			alpha = ( t - t0 ) / ( t1 - t0 );

  		for ( var end = offset + stride; offset !== end; offset += 4 ) {

  			Quaternion.slerpFlat( result, 0,
  					values, offset - stride, values, offset, alpha );

  		}

  		return result;

  	}

  } );

  /**
   *
   * A Track of quaternion keyframe values.
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function QuaternionKeyframeTrack( name, times, values, interpolation ) {

  	KeyframeTrackConstructor.call( this, name, times, values, interpolation );

  };

  QuaternionKeyframeTrack.prototype =
  		Object.assign( Object.create( KeyframeTrackPrototype ), {

  	constructor: QuaternionKeyframeTrack,

  	ValueTypeName: 'quaternion',

  	// ValueBufferType is inherited

  	DefaultInterpolation: InterpolateLinear,

  	InterpolantFactoryMethodLinear: function( result ) {

  		return new QuaternionLinearInterpolant(
  				this.times, this.values, this.getValueSize(), result );

  	},

  	InterpolantFactoryMethodSmooth: undefined // not yet implemented

  } );

  /**
   *
   * A Track of numeric keyframe values.
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function NumberKeyframeTrack( name, times, values, interpolation ) {

  	KeyframeTrackConstructor.call( this, name, times, values, interpolation );

  };

  NumberKeyframeTrack.prototype =
  		Object.assign( Object.create( KeyframeTrackPrototype ), {

  	constructor: NumberKeyframeTrack,

  	ValueTypeName: 'number',

  	// ValueBufferType is inherited

  	// DefaultInterpolation is inherited

  } );

  /**
   *
   * A Track that interpolates Strings
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function StringKeyframeTrack( name, times, values, interpolation ) {

  	KeyframeTrackConstructor.call( this, name, times, values, interpolation );

  };

  StringKeyframeTrack.prototype =
  		Object.assign( Object.create( KeyframeTrackPrototype ), {

  	constructor: StringKeyframeTrack,

  	ValueTypeName: 'string',
  	ValueBufferType: Array,

  	DefaultInterpolation: InterpolateDiscrete,

  	InterpolantFactoryMethodLinear: undefined,

  	InterpolantFactoryMethodSmooth: undefined

  } );

  /**
   *
   * A Track of Boolean keyframe values.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function BooleanKeyframeTrack( name, times, values ) {

  	KeyframeTrackConstructor.call( this, name, times, values );

  };

  BooleanKeyframeTrack.prototype =
  		Object.assign( Object.create( KeyframeTrackPrototype ), {

  	constructor: BooleanKeyframeTrack,

  	ValueTypeName: 'bool',
  	ValueBufferType: Array,

  	DefaultInterpolation: InterpolateDiscrete,

  	InterpolantFactoryMethodLinear: undefined,
  	InterpolantFactoryMethodSmooth: undefined

  	// Note: Actually this track could have a optimized / compressed
  	// representation of a single value and a custom interpolant that
  	// computes "firstValue ^ isOdd( index )".

  } );

  /**
   *
   * A Track of keyframe values that represent color.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function ColorKeyframeTrack( name, times, values, interpolation ) {

  	KeyframeTrackConstructor.call( this, name, times, values, interpolation );

  };

  ColorKeyframeTrack.prototype =
  		Object.assign( Object.create( KeyframeTrackPrototype ), {

  	constructor: ColorKeyframeTrack,

  	ValueTypeName: 'color'

  	// ValueBufferType is inherited

  	// DefaultInterpolation is inherited


  	// Note: Very basic implementation and nothing special yet.
  	// However, this is the place for color space parameterization.

  } );

  /**
   *
   * A timed sequence of keyframes for a specific property.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function KeyframeTrack( name, times, values, interpolation ) {
  	KeyframeTrackConstructor.apply( this, arguments );
  };

  KeyframeTrack.prototype = KeyframeTrackPrototype;
  KeyframeTrackPrototype.constructor = KeyframeTrack;

  // Static methods:

  Object.assign( KeyframeTrack, {

  	// Serialization (in static context, because of constructor invocation
  	// and automatic invocation of .toJSON):

  	parse: function( json ) {

  		if( json.type === undefined ) {

  			throw new Error( "track type undefined, can not parse" );

  		}

  		var trackType = KeyframeTrack._getTrackTypeForValueTypeName( json.type );

  		if ( json.times === undefined ) {

  			var times = [], values = [];

  			exports.AnimationUtils.flattenJSON( json.keys, times, values, 'value' );

  			json.times = times;
  			json.values = values;

  		}

  		// derived classes can define a static parse method
  		if ( trackType.parse !== undefined ) {

  			return trackType.parse( json );

  		} else {

  			// by default, we asssume a constructor compatible with the base
  			return new trackType(
  					json.name, json.times, json.values, json.interpolation );

  		}

  	},

  	toJSON: function( track ) {

  		var trackType = track.constructor;

  		var json;

  		// derived classes can define a static toJSON method
  		if ( trackType.toJSON !== undefined ) {

  			json = trackType.toJSON( track );

  		} else {

  			// by default, we assume the data can be serialized as-is
  			json = {

  				'name': track.name,
  				'times': exports.AnimationUtils.convertArray( track.times, Array ),
  				'values': exports.AnimationUtils.convertArray( track.values, Array )

  			};

  			var interpolation = track.getInterpolation();

  			if ( interpolation !== track.DefaultInterpolation ) {

  				json.interpolation = interpolation;

  			}

  		}

  		json.type = track.ValueTypeName; // mandatory

  		return json;

  	},

  	_getTrackTypeForValueTypeName: function( typeName ) {

  		switch( typeName.toLowerCase() ) {

  			case "scalar":
  			case "double":
  			case "float":
  			case "number":
  			case "integer":

  				return NumberKeyframeTrack;

  			case "vector":
  			case "vector2":
  			case "vector3":
  			case "vector4":

  				return VectorKeyframeTrack;

  			case "color":

  				return ColorKeyframeTrack;

  			case "quaternion":

  				return QuaternionKeyframeTrack;

  			case "bool":
  			case "boolean":

  				return BooleanKeyframeTrack;

  			case "string":

  				return StringKeyframeTrack;

  		}

  		throw new Error( "Unsupported typeName: " + typeName );

  	}

  } );

  /**
   *
   * Reusable set of Tracks that represent an animation.
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   */

  function AnimationClip( name, duration, tracks ) {

  	this.name = name;
  	this.tracks = tracks;
  	this.duration = ( duration !== undefined ) ? duration : -1;

  	this.uuid = exports.Math.generateUUID();

  	// this means it should figure out its duration by scanning the tracks
  	if ( this.duration < 0 ) {

  		this.resetDuration();

  	}

  	// maybe only do these on demand, as doing them here could potentially slow down loading
  	// but leaving these here during development as this ensures a lot of testing of these functions
  	this.trim();
  	this.optimize();

  };

  AnimationClip.prototype = {

  	constructor: AnimationClip,

  	resetDuration: function() {

  		var tracks = this.tracks,
  			duration = 0;

  		for ( var i = 0, n = tracks.length; i !== n; ++ i ) {

  			var track = this.tracks[ i ];

  			duration = Math.max(
  					duration, track.times[ track.times.length - 1 ] );

  		}

  		this.duration = duration;

  	},

  	trim: function() {

  		for ( var i = 0; i < this.tracks.length; i ++ ) {

  			this.tracks[ i ].trim( 0, this.duration );

  		}

  		return this;

  	},

  	optimize: function() {

  		for ( var i = 0; i < this.tracks.length; i ++ ) {

  			this.tracks[ i ].optimize();

  		}

  		return this;

  	}

  };

  // Static methods:

  Object.assign( AnimationClip, {

  	parse: function( json ) {

  		var tracks = [],
  			jsonTracks = json.tracks,
  			frameTime = 1.0 / ( json.fps || 1.0 );

  		for ( var i = 0, n = jsonTracks.length; i !== n; ++ i ) {

  			tracks.push( KeyframeTrack.parse( jsonTracks[ i ] ).scale( frameTime ) );

  		}

  		return new AnimationClip( json.name, json.duration, tracks );

  	},


  	toJSON: function( clip ) {

  		var tracks = [],
  			clipTracks = clip.tracks;

  		var json = {

  			'name': clip.name,
  			'duration': clip.duration,
  			'tracks': tracks

  		};

  		for ( var i = 0, n = clipTracks.length; i !== n; ++ i ) {

  			tracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );

  		}

  		return json;

  	},


  	CreateFromMorphTargetSequence: function( name, morphTargetSequence, fps, noLoop ) {

  		var numMorphTargets = morphTargetSequence.length;
  		var tracks = [];

  		for ( var i = 0; i < numMorphTargets; i ++ ) {

  			var times = [];
  			var values = [];

  			times.push(
  					( i + numMorphTargets - 1 ) % numMorphTargets,
  					i,
  					( i + 1 ) % numMorphTargets );

  			values.push( 0, 1, 0 );

  			var order = exports.AnimationUtils.getKeyframeOrder( times );
  			times = exports.AnimationUtils.sortedArray( times, 1, order );
  			values = exports.AnimationUtils.sortedArray( values, 1, order );

  			// if there is a key at the first frame, duplicate it as the
  			// last frame as well for perfect loop.
  			if ( ! noLoop && times[ 0 ] === 0 ) {

  				times.push( numMorphTargets );
  				values.push( values[ 0 ] );

  			}

  			tracks.push(
  					new NumberKeyframeTrack(
  						'.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',
  						times, values
  					).scale( 1.0 / fps ) );
  		}

  		return new AnimationClip( name, -1, tracks );

  	},

  	findByName: function( objectOrClipArray, name ) {

  		var clipArray = objectOrClipArray;

  		if ( ! Array.isArray( objectOrClipArray ) ) {

  			var o = objectOrClipArray;
  			clipArray = o.geometry && o.geometry.animations || o.animations;

  		}

  		for ( var i = 0; i < clipArray.length; i ++ ) {

  			if ( clipArray[ i ].name === name ) {

  				return clipArray[ i ];

  			}
  		}

  		return null;

  	},

  	CreateClipsFromMorphTargetSequences: function( morphTargets, fps, noLoop ) {

  		var animationToMorphTargets = {};

  		// tested with https://regex101.com/ on trick sequences
  		// such flamingo_flyA_003, flamingo_run1_003, crdeath0059
  		var pattern = /^([\w-]*?)([\d]+)$/;

  		// sort morph target names into animation groups based
  		// patterns like Walk_001, Walk_002, Run_001, Run_002
  		for ( var i = 0, il = morphTargets.length; i < il; i ++ ) {

  			var morphTarget = morphTargets[ i ];
  			var parts = morphTarget.name.match( pattern );

  			if ( parts && parts.length > 1 ) {

  				var name = parts[ 1 ];

  				var animationMorphTargets = animationToMorphTargets[ name ];
  				if ( ! animationMorphTargets ) {

  					animationToMorphTargets[ name ] = animationMorphTargets = [];

  				}

  				animationMorphTargets.push( morphTarget );

  			}

  		}

  		var clips = [];

  		for ( var name in animationToMorphTargets ) {

  			clips.push( AnimationClip.CreateFromMorphTargetSequence( name, animationToMorphTargets[ name ], fps, noLoop ) );

  		}

  		return clips;

  	},

  	// parse the animation.hierarchy format
  	parseAnimation: function( animation, bones, nodeName ) {

  		if ( ! animation ) {

  			console.error( "  no animation in JSONLoader data" );
  			return null;

  		}

  		var addNonemptyTrack = function(
  				trackType, trackName, animationKeys, propertyName, destTracks ) {

  			// only return track if there are actually keys.
  			if ( animationKeys.length !== 0 ) {

  				var times = [];
  				var values = [];

  				exports.AnimationUtils.flattenJSON(
  						animationKeys, times, values, propertyName );

  				// empty keys are filtered out, so check again
  				if ( times.length !== 0 ) {

  					destTracks.push( new trackType( trackName, times, values ) );

  				}

  			}

  		};

  		var tracks = [];

  		var clipName = animation.name || 'default';
  		// automatic length determination in AnimationClip.
  		var duration = animation.length || -1;
  		var fps = animation.fps || 30;

  		var hierarchyTracks = animation.hierarchy || [];

  		for ( var h = 0; h < hierarchyTracks.length; h ++ ) {

  			var animationKeys = hierarchyTracks[ h ].keys;

  			// skip empty tracks
  			if ( ! animationKeys || animationKeys.length === 0 ) continue;

  			// process morph targets in a way exactly compatible
  			// with AnimationHandler.init( animation )
  			if ( animationKeys[0].morphTargets ) {

  				// figure out all morph targets used in this track
  				var morphTargetNames = {};
  				for ( var k = 0; k < animationKeys.length; k ++ ) {

  					if ( animationKeys[k].morphTargets ) {

  						for ( var m = 0; m < animationKeys[k].morphTargets.length; m ++ ) {

  							morphTargetNames[ animationKeys[k].morphTargets[m] ] = -1;
  						}

  					}

  				}

  				// create a track for each morph target with all zero
  				// morphTargetInfluences except for the keys in which
  				// the morphTarget is named.
  				for ( var morphTargetName in morphTargetNames ) {

  					var times = [];
  					var values = [];

  					for ( var m = 0;
  							m !== animationKeys[k].morphTargets.length; ++ m ) {

  						var animationKey = animationKeys[k];

  						times.push( animationKey.time );
  						values.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );

  					}

  					tracks.push( new NumberKeyframeTrack(
  							'.morphTargetInfluence[' + morphTargetName + ']', times, values ) );

  				}

  				duration = morphTargetNames.length * ( fps || 1.0 );

  			} else {
  				// ...assume skeletal animation

  				var boneName = '.bones[' + bones[ h ].name + ']';

  				addNonemptyTrack(
  						VectorKeyframeTrack, boneName + '.position',
  						animationKeys, 'pos', tracks );

  				addNonemptyTrack(
  						QuaternionKeyframeTrack, boneName + '.quaternion',
  						animationKeys, 'rot', tracks );

  				addNonemptyTrack(
  						VectorKeyframeTrack, boneName + '.scale',
  						animationKeys, 'scl', tracks );

  			}

  		}

  		if ( tracks.length === 0 ) {

  			return null;

  		}

  		var clip = new AnimationClip( clipName, duration, tracks );

  		return clip;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function MaterialLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;
  	this.textures = {};

  };

  Object.assign( MaterialLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var loader = new XHRLoader( scope.manager );
  		loader.load( url, function ( text ) {

  			onLoad( scope.parse( JSON.parse( text ) ) );

  		}, onProgress, onError );

  	},

  	setTextures: function ( value ) {

  		this.textures = value;

  	},

  	getTexture: function ( name ) {

  		var textures = this.textures;

  		if ( textures[ name ] === undefined ) {

  			console.warn( 'THREE.MaterialLoader: Undefined texture', name );

  		}

  		return textures[ name ];

  	},

  	parse: function ( json ) {

  		var material = new THREE[ json.type ];

  		if ( json.uuid !== undefined ) material.uuid = json.uuid;
  		if ( json.name !== undefined ) material.name = json.name;
  		if ( json.color !== undefined ) material.color.setHex( json.color );
  		if ( json.roughness !== undefined ) material.roughness = json.roughness;
  		if ( json.metalness !== undefined ) material.metalness = json.metalness;
  		if ( json.emissive !== undefined ) material.emissive.setHex( json.emissive );
  		if ( json.specular !== undefined ) material.specular.setHex( json.specular );
  		if ( json.shininess !== undefined ) material.shininess = json.shininess;
  		if ( json.uniforms !== undefined ) material.uniforms = json.uniforms;
  		if ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;
  		if ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;
  		if ( json.vertexColors !== undefined ) material.vertexColors = json.vertexColors;
  		if ( json.shading !== undefined ) material.shading = json.shading;
  		if ( json.blending !== undefined ) material.blending = json.blending;
  		if ( json.side !== undefined ) material.side = json.side;
  		if ( json.opacity !== undefined ) material.opacity = json.opacity;
  		if ( json.transparent !== undefined ) material.transparent = json.transparent;
  		if ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;
  		if ( json.depthTest !== undefined ) material.depthTest = json.depthTest;
  		if ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;
  		if ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;
  		if ( json.wireframe !== undefined ) material.wireframe = json.wireframe;
  		if ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;

  		// for PointsMaterial
  		if ( json.size !== undefined ) material.size = json.size;
  		if ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;

  		// maps

  		if ( json.map !== undefined ) material.map = this.getTexture( json.map );

  		if ( json.alphaMap !== undefined ) {

  			material.alphaMap = this.getTexture( json.alphaMap );
  			material.transparent = true;

  		}

  		if ( json.bumpMap !== undefined ) material.bumpMap = this.getTexture( json.bumpMap );
  		if ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;

  		if ( json.normalMap !== undefined ) material.normalMap = this.getTexture( json.normalMap );
  		if ( json.normalScale !== undefined ) {

  			var normalScale = json.normalScale;

  			if ( Array.isArray( normalScale ) === false ) {

  				// Blender exporter used to export a scalar. See #7459

  				normalScale = [ normalScale, normalScale ];

  			}

  			material.normalScale = new Vector2().fromArray( normalScale );

  		}

  		if ( json.displacementMap !== undefined ) material.displacementMap = this.getTexture( json.displacementMap );
  		if ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;
  		if ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;

  		if ( json.roughnessMap !== undefined ) material.roughnessMap = this.getTexture( json.roughnessMap );
  		if ( json.metalnessMap !== undefined ) material.metalnessMap = this.getTexture( json.metalnessMap );

  		if ( json.emissiveMap !== undefined ) material.emissiveMap = this.getTexture( json.emissiveMap );
  		if ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;

  		if ( json.specularMap !== undefined ) material.specularMap = this.getTexture( json.specularMap );

  		if ( json.envMap !== undefined ) {

  			material.envMap = this.getTexture( json.envMap );
  			material.combine = MultiplyOperation;

  		}

  		if ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;

  		if ( json.lightMap !== undefined ) material.lightMap = this.getTexture( json.lightMap );
  		if ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;

  		if ( json.aoMap !== undefined ) material.aoMap = this.getTexture( json.aoMap );
  		if ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;

  		// MultiMaterial

  		if ( json.materials !== undefined ) {

  			for ( var i = 0, l = json.materials.length; i < l; i ++ ) {

  				material.materials.push( this.parse( json.materials[ i ] ) );

  			}

  		}

  		return material;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function BufferGeometryLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( BufferGeometryLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var loader = new XHRLoader( scope.manager );
  		loader.load( url, function ( text ) {

  			onLoad( scope.parse( JSON.parse( text ) ) );

  		}, onProgress, onError );

  	},

  	parse: function ( json ) {

  		var geometry = new BufferGeometry();

  		var index = json.data.index;

  		var TYPED_ARRAYS = {
  			'Int8Array': Int8Array,
  			'Uint8Array': Uint8Array,
  			'Uint8ClampedArray': Uint8ClampedArray,
  			'Int16Array': Int16Array,
  			'Uint16Array': Uint16Array,
  			'Int32Array': Int32Array,
  			'Uint32Array': Uint32Array,
  			'Float32Array': Float32Array,
  			'Float64Array': Float64Array
  		};

  		if ( index !== undefined ) {

  			var typedArray = new TYPED_ARRAYS[ index.type ]( index.array );
  			geometry.setIndex( new BufferAttribute( typedArray, 1 ) );

  		}

  		var attributes = json.data.attributes;

  		for ( var key in attributes ) {

  			var attribute = attributes[ key ];
  			var typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );

  			geometry.addAttribute( key, new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized ) );

  		}

  		var groups = json.data.groups || json.data.drawcalls || json.data.offsets;

  		if ( groups !== undefined ) {

  			for ( var i = 0, n = groups.length; i !== n; ++ i ) {

  				var group = groups[ i ];

  				geometry.addGroup( group.start, group.count, group.materialIndex );

  			}

  		}

  		var boundingSphere = json.data.boundingSphere;

  		if ( boundingSphere !== undefined ) {

  			var center = new Vector3();

  			if ( boundingSphere.center !== undefined ) {

  				center.fromArray( boundingSphere.center );

  			}

  			geometry.boundingSphere = new Sphere( center, boundingSphere.radius );

  		}

  		return geometry;

  	}

  } );

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function Loader() {

  	this.onLoadStart = function () {};
  	this.onLoadProgress = function () {};
  	this.onLoadComplete = function () {};

  };

  Loader.prototype = {

  	constructor: Loader,

  	crossOrigin: undefined,

  	extractUrlBase: function ( url ) {

  		var parts = url.split( '/' );

  		if ( parts.length === 1 ) return './';

  		parts.pop();

  		return parts.join( '/' ) + '/';

  	},

  	initMaterials: function ( materials, texturePath, crossOrigin ) {

  		var array = [];

  		for ( var i = 0; i < materials.length; ++ i ) {

  			array[ i ] = this.createMaterial( materials[ i ], texturePath, crossOrigin );

  		}

  		return array;

  	},

  	createMaterial: ( function () {

  		var color, textureLoader, materialLoader;

  		return function createMaterial( m, texturePath, crossOrigin ) {

  			if ( color === undefined ) color = new Color();
  			if ( textureLoader === undefined ) textureLoader = new TextureLoader();
  			if ( materialLoader === undefined ) materialLoader = new MaterialLoader();

  			// convert from old material format

  			var textures = {};

  			function loadTexture( path, repeat, offset, wrap, anisotropy ) {

  				var fullPath = texturePath + path;
  				var loader = Loader.Handlers.get( fullPath );

  				var texture;

  				if ( loader !== null ) {

  					texture = loader.load( fullPath );

  				} else {

  					textureLoader.setCrossOrigin( crossOrigin );
  					texture = textureLoader.load( fullPath );

  				}

  				if ( repeat !== undefined ) {

  					texture.repeat.fromArray( repeat );

  					if ( repeat[ 0 ] !== 1 ) texture.wrapS = RepeatWrapping;
  					if ( repeat[ 1 ] !== 1 ) texture.wrapT = RepeatWrapping;

  				}

  				if ( offset !== undefined ) {

  					texture.offset.fromArray( offset );

  				}

  				if ( wrap !== undefined ) {

  					if ( wrap[ 0 ] === 'repeat' ) texture.wrapS = RepeatWrapping;
  					if ( wrap[ 0 ] === 'mirror' ) texture.wrapS = MirroredRepeatWrapping;

  					if ( wrap[ 1 ] === 'repeat' ) texture.wrapT = RepeatWrapping;
  					if ( wrap[ 1 ] === 'mirror' ) texture.wrapT = MirroredRepeatWrapping;

  				}

  				if ( anisotropy !== undefined ) {

  					texture.anisotropy = anisotropy;

  				}

  				var uuid = exports.Math.generateUUID();

  				textures[ uuid ] = texture;

  				return uuid;

  			}

  			//

  			var json = {
  				uuid: exports.Math.generateUUID(),
  				type: 'MeshLambertMaterial'
  			};

  			for ( var name in m ) {

  				var value = m[ name ];

  				switch ( name ) {
  					case 'DbgColor':
  					case 'DbgIndex':
  					case 'opticalDensity':
  					case 'illumination':
  						break;
  					case 'DbgName':
  						json.name = value;
  						break;
  					case 'blending':
  						json.blending = THREE[ value ];
  						break;
  					case 'colorAmbient':
  					case 'mapAmbient':
  						console.warn( 'THREE.Loader.createMaterial:', name, 'is no longer supported.' );
  						break;
  					case 'colorDiffuse':
  						json.color = color.fromArray( value ).getHex();
  						break;
  					case 'colorSpecular':
  						json.specular = color.fromArray( value ).getHex();
  						break;
  					case 'colorEmissive':
  						json.emissive = color.fromArray( value ).getHex();
  						break;
  					case 'specularCoef':
  						json.shininess = value;
  						break;
  					case 'shading':
  						if ( value.toLowerCase() === 'basic' ) json.type = 'MeshBasicMaterial';
  						if ( value.toLowerCase() === 'phong' ) json.type = 'MeshPhongMaterial';
  						if ( value.toLowerCase() === 'standard' ) json.type = 'MeshStandardMaterial';
  						break;
  					case 'mapDiffuse':
  						json.map = loadTexture( value, m.mapDiffuseRepeat, m.mapDiffuseOffset, m.mapDiffuseWrap, m.mapDiffuseAnisotropy );
  						break;
  					case 'mapDiffuseRepeat':
  					case 'mapDiffuseOffset':
  					case 'mapDiffuseWrap':
  					case 'mapDiffuseAnisotropy':
  						break;
  					case 'mapEmissive':
  						json.emissiveMap = loadTexture( value, m.mapEmissiveRepeat, m.mapEmissiveOffset, m.mapEmissiveWrap, m.mapEmissiveAnisotropy );
  						break;
  					case 'mapEmissiveRepeat':
  					case 'mapEmissiveOffset':
  					case 'mapEmissiveWrap':
  					case 'mapEmissiveAnisotropy':
  						break;
  					case 'mapLight':
  						json.lightMap = loadTexture( value, m.mapLightRepeat, m.mapLightOffset, m.mapLightWrap, m.mapLightAnisotropy );
  						break;
  					case 'mapLightRepeat':
  					case 'mapLightOffset':
  					case 'mapLightWrap':
  					case 'mapLightAnisotropy':
  						break;
  					case 'mapAO':
  						json.aoMap = loadTexture( value, m.mapAORepeat, m.mapAOOffset, m.mapAOWrap, m.mapAOAnisotropy );
  						break;
  					case 'mapAORepeat':
  					case 'mapAOOffset':
  					case 'mapAOWrap':
  					case 'mapAOAnisotropy':
  						break;
  					case 'mapBump':
  						json.bumpMap = loadTexture( value, m.mapBumpRepeat, m.mapBumpOffset, m.mapBumpWrap, m.mapBumpAnisotropy );
  						break;
  					case 'mapBumpScale':
  						json.bumpScale = value;
  						break;
  					case 'mapBumpRepeat':
  					case 'mapBumpOffset':
  					case 'mapBumpWrap':
  					case 'mapBumpAnisotropy':
  						break;
  					case 'mapNormal':
  						json.normalMap = loadTexture( value, m.mapNormalRepeat, m.mapNormalOffset, m.mapNormalWrap, m.mapNormalAnisotropy );
  						break;
  					case 'mapNormalFactor':
  						json.normalScale = [ value, value ];
  						break;
  					case 'mapNormalRepeat':
  					case 'mapNormalOffset':
  					case 'mapNormalWrap':
  					case 'mapNormalAnisotropy':
  						break;
  					case 'mapSpecular':
  						json.specularMap = loadTexture( value, m.mapSpecularRepeat, m.mapSpecularOffset, m.mapSpecularWrap, m.mapSpecularAnisotropy );
  						break;
  					case 'mapSpecularRepeat':
  					case 'mapSpecularOffset':
  					case 'mapSpecularWrap':
  					case 'mapSpecularAnisotropy':
  						break;
  					case 'mapMetalness':
  						json.metalnessMap = loadTexture( value, m.mapMetalnessRepeat, m.mapMetalnessOffset, m.mapMetalnessWrap, m.mapMetalnessAnisotropy );
  						break;
  					case 'mapMetalnessRepeat':
  					case 'mapMetalnessOffset':
  					case 'mapMetalnessWrap':
  					case 'mapMetalnessAnisotropy':
  						break;
  					case 'mapRoughness':
  						json.roughnessMap = loadTexture( value, m.mapRoughnessRepeat, m.mapRoughnessOffset, m.mapRoughnessWrap, m.mapRoughnessAnisotropy );
  						break;
  					case 'mapRoughnessRepeat':
  					case 'mapRoughnessOffset':
  					case 'mapRoughnessWrap':
  					case 'mapRoughnessAnisotropy':
  						break;
  					case 'mapAlpha':
  						json.alphaMap = loadTexture( value, m.mapAlphaRepeat, m.mapAlphaOffset, m.mapAlphaWrap, m.mapAlphaAnisotropy );
  						break;
  					case 'mapAlphaRepeat':
  					case 'mapAlphaOffset':
  					case 'mapAlphaWrap':
  					case 'mapAlphaAnisotropy':
  						break;
  					case 'flipSided':
  						json.side = BackSide;
  						break;
  					case 'doubleSided':
  						json.side = DoubleSide;
  						break;
  					case 'transparency':
  						console.warn( 'THREE.Loader.createMaterial: transparency has been renamed to opacity' );
  						json.opacity = value;
  						break;
  					case 'depthTest':
  					case 'depthWrite':
  					case 'colorWrite':
  					case 'opacity':
  					case 'reflectivity':
  					case 'transparent':
  					case 'visible':
  					case 'wireframe':
  						json[ name ] = value;
  						break;
  					case 'vertexColors':
  						if ( value === true ) json.vertexColors = VertexColors;
  						if ( value === 'face' ) json.vertexColors = FaceColors;
  						break;
  					default:
  						console.error( 'THREE.Loader.createMaterial: Unsupported', name, value );
  						break;
  				}

  			}

  			if ( json.type === 'MeshBasicMaterial' ) delete json.emissive;
  			if ( json.type !== 'MeshPhongMaterial' ) delete json.specular;

  			if ( json.opacity < 1 ) json.transparent = true;

  			materialLoader.setTextures( textures );

  			return materialLoader.parse( json );

  		};

  	} )()

  };

  Loader.Handlers = {

  	handlers: [],

  	add: function ( regex, loader ) {

  		this.handlers.push( regex, loader );

  	},

  	get: function ( file ) {

  		var handlers = this.handlers;

  		for ( var i = 0, l = handlers.length; i < l; i += 2 ) {

  			var regex = handlers[ i ];
  			var loader  = handlers[ i + 1 ];

  			if ( regex.test( file ) ) {

  				return loader;

  			}

  		}

  		return null;

  	}

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function JSONLoader( manager ) {

  	if ( typeof manager === 'boolean' ) {

  		console.warn( 'THREE.JSONLoader: showStatus parameter has been removed from constructor.' );
  		manager = undefined;

  	}

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  	this.withCredentials = false;

  };

  Object.assign( JSONLoader.prototype, {

  	load: function( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var texturePath = this.texturePath && ( typeof this.texturePath === "string" ) ? this.texturePath : Loader.prototype.extractUrlBase( url );

  		var loader = new XHRLoader( this.manager );
  		loader.setWithCredentials( this.withCredentials );
  		loader.load( url, function ( text ) {

  			var json = JSON.parse( text );
  			var metadata = json.metadata;

  			if ( metadata !== undefined ) {

  				var type = metadata.type;

  				if ( type !== undefined ) {

  					if ( type.toLowerCase() === 'object' ) {

  						console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.ObjectLoader instead.' );
  						return;

  					}

  					if ( type.toLowerCase() === 'scene' ) {

  						console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.SceneLoader instead.' );
  						return;

  					}

  				}

  			}

  			var object = scope.parse( json, texturePath );
  			onLoad( object.geometry, object.materials );

  		}, onProgress, onError );

  	},

  	setTexturePath: function ( value ) {

  		this.texturePath = value;

  	},

  	parse: function ( json, texturePath ) {

  		var geometry = new Geometry(),
  		scale = ( json.scale !== undefined ) ? 1.0 / json.scale : 1.0;

  		parseModel( scale );

  		parseSkin();
  		parseMorphing( scale );
  		parseAnimations();

  		geometry.computeFaceNormals();
  		geometry.computeBoundingSphere();

  		function parseModel( scale ) {

  			function isBitSet( value, position ) {

  				return value & ( 1 << position );

  			}

  			var i, j, fi,

  			offset, zLength,

  		colorIndex, normalIndex, uvIndex, materialIndex,

  			type,
  			isQuad,
  			hasMaterial,
  			hasFaceVertexUv,
  			hasFaceNormal, hasFaceVertexNormal,
  			hasFaceColor, hasFaceVertexColor,

  		vertex, face, faceA, faceB, hex, normal,

  			uvLayer, uv, u, v,

  			faces = json.faces,
  			vertices = json.vertices,
  			normals = json.normals,
  			colors = json.colors,

  			nUvLayers = 0;

  			if ( json.uvs !== undefined ) {

  				// disregard empty arrays

  				for ( i = 0; i < json.uvs.length; i ++ ) {

  					if ( json.uvs[ i ].length ) nUvLayers ++;

  				}

  				for ( i = 0; i < nUvLayers; i ++ ) {

  					geometry.faceVertexUvs[ i ] = [];

  				}

  			}

  			offset = 0;
  			zLength = vertices.length;

  			while ( offset < zLength ) {

  				vertex = new Vector3();

  				vertex.x = vertices[ offset ++ ] * scale;
  				vertex.y = vertices[ offset ++ ] * scale;
  				vertex.z = vertices[ offset ++ ] * scale;

  				geometry.vertices.push( vertex );

  			}

  			offset = 0;
  			zLength = faces.length;

  			while ( offset < zLength ) {

  				type = faces[ offset ++ ];


  				isQuad              = isBitSet( type, 0 );
  				hasMaterial         = isBitSet( type, 1 );
  				hasFaceVertexUv     = isBitSet( type, 3 );
  				hasFaceNormal       = isBitSet( type, 4 );
  				hasFaceVertexNormal = isBitSet( type, 5 );
  				hasFaceColor	     = isBitSet( type, 6 );
  				hasFaceVertexColor  = isBitSet( type, 7 );

  				// console.log("type", type, "bits", isQuad, hasMaterial, hasFaceVertexUv, hasFaceNormal, hasFaceVertexNormal, hasFaceColor, hasFaceVertexColor);

  				if ( isQuad ) {

  					faceA = new Face3();
  					faceA.a = faces[ offset ];
  					faceA.b = faces[ offset + 1 ];
  					faceA.c = faces[ offset + 3 ];

  					faceB = new Face3();
  					faceB.a = faces[ offset + 1 ];
  					faceB.b = faces[ offset + 2 ];
  					faceB.c = faces[ offset + 3 ];

  					offset += 4;

  					if ( hasMaterial ) {

  						materialIndex = faces[ offset ++ ];
  						faceA.materialIndex = materialIndex;
  						faceB.materialIndex = materialIndex;

  					}

  					// to get face <=> uv index correspondence

  					fi = geometry.faces.length;

  					if ( hasFaceVertexUv ) {

  						for ( i = 0; i < nUvLayers; i ++ ) {

  							uvLayer = json.uvs[ i ];

  							geometry.faceVertexUvs[ i ][ fi ] = [];
  							geometry.faceVertexUvs[ i ][ fi + 1 ] = [];

  							for ( j = 0; j < 4; j ++ ) {

  								uvIndex = faces[ offset ++ ];

  								u = uvLayer[ uvIndex * 2 ];
  								v = uvLayer[ uvIndex * 2 + 1 ];

  								uv = new Vector2( u, v );

  								if ( j !== 2 ) geometry.faceVertexUvs[ i ][ fi ].push( uv );
  								if ( j !== 0 ) geometry.faceVertexUvs[ i ][ fi + 1 ].push( uv );

  							}

  						}

  					}

  					if ( hasFaceNormal ) {

  						normalIndex = faces[ offset ++ ] * 3;

  						faceA.normal.set(
  							normals[ normalIndex ++ ],
  							normals[ normalIndex ++ ],
  							normals[ normalIndex ]
  						);

  						faceB.normal.copy( faceA.normal );

  					}

  					if ( hasFaceVertexNormal ) {

  						for ( i = 0; i < 4; i ++ ) {

  							normalIndex = faces[ offset ++ ] * 3;

  							normal = new Vector3(
  								normals[ normalIndex ++ ],
  								normals[ normalIndex ++ ],
  								normals[ normalIndex ]
  							);


  							if ( i !== 2 ) faceA.vertexNormals.push( normal );
  							if ( i !== 0 ) faceB.vertexNormals.push( normal );

  						}

  					}


  					if ( hasFaceColor ) {

  						colorIndex = faces[ offset ++ ];
  						hex = colors[ colorIndex ];

  						faceA.color.setHex( hex );
  						faceB.color.setHex( hex );

  					}


  					if ( hasFaceVertexColor ) {

  						for ( i = 0; i < 4; i ++ ) {

  							colorIndex = faces[ offset ++ ];
  							hex = colors[ colorIndex ];

  							if ( i !== 2 ) faceA.vertexColors.push( new Color( hex ) );
  							if ( i !== 0 ) faceB.vertexColors.push( new Color( hex ) );

  						}

  					}

  					geometry.faces.push( faceA );
  					geometry.faces.push( faceB );

  				} else {

  					face = new Face3();
  					face.a = faces[ offset ++ ];
  					face.b = faces[ offset ++ ];
  					face.c = faces[ offset ++ ];

  					if ( hasMaterial ) {

  						materialIndex = faces[ offset ++ ];
  						face.materialIndex = materialIndex;

  					}

  					// to get face <=> uv index correspondence

  					fi = geometry.faces.length;

  					if ( hasFaceVertexUv ) {

  						for ( i = 0; i < nUvLayers; i ++ ) {

  							uvLayer = json.uvs[ i ];

  							geometry.faceVertexUvs[ i ][ fi ] = [];

  							for ( j = 0; j < 3; j ++ ) {

  								uvIndex = faces[ offset ++ ];

  								u = uvLayer[ uvIndex * 2 ];
  								v = uvLayer[ uvIndex * 2 + 1 ];

  								uv = new Vector2( u, v );

  								geometry.faceVertexUvs[ i ][ fi ].push( uv );

  							}

  						}

  					}

  					if ( hasFaceNormal ) {

  						normalIndex = faces[ offset ++ ] * 3;

  						face.normal.set(
  							normals[ normalIndex ++ ],
  							normals[ normalIndex ++ ],
  							normals[ normalIndex ]
  						);

  					}

  					if ( hasFaceVertexNormal ) {

  						for ( i = 0; i < 3; i ++ ) {

  							normalIndex = faces[ offset ++ ] * 3;

  							normal = new Vector3(
  								normals[ normalIndex ++ ],
  								normals[ normalIndex ++ ],
  								normals[ normalIndex ]
  							);

  							face.vertexNormals.push( normal );

  						}

  					}


  					if ( hasFaceColor ) {

  						colorIndex = faces[ offset ++ ];
  						face.color.setHex( colors[ colorIndex ] );

  					}


  					if ( hasFaceVertexColor ) {

  						for ( i = 0; i < 3; i ++ ) {

  							colorIndex = faces[ offset ++ ];
  							face.vertexColors.push( new Color( colors[ colorIndex ] ) );

  						}

  					}

  					geometry.faces.push( face );

  				}

  			}

  		}

  		function parseSkin() {

  			var influencesPerVertex = ( json.influencesPerVertex !== undefined ) ? json.influencesPerVertex : 2;

  			if ( json.skinWeights ) {

  				for ( var i = 0, l = json.skinWeights.length; i < l; i += influencesPerVertex ) {

  					var x =                               json.skinWeights[ i ];
  					var y = ( influencesPerVertex > 1 ) ? json.skinWeights[ i + 1 ] : 0;
  					var z = ( influencesPerVertex > 2 ) ? json.skinWeights[ i + 2 ] : 0;
  					var w = ( influencesPerVertex > 3 ) ? json.skinWeights[ i + 3 ] : 0;

  					geometry.skinWeights.push( new Vector4( x, y, z, w ) );

  				}

  			}

  			if ( json.skinIndices ) {

  				for ( var i = 0, l = json.skinIndices.length; i < l; i += influencesPerVertex ) {

  					var a =                               json.skinIndices[ i ];
  					var b = ( influencesPerVertex > 1 ) ? json.skinIndices[ i + 1 ] : 0;
  					var c = ( influencesPerVertex > 2 ) ? json.skinIndices[ i + 2 ] : 0;
  					var d = ( influencesPerVertex > 3 ) ? json.skinIndices[ i + 3 ] : 0;

  					geometry.skinIndices.push( new Vector4( a, b, c, d ) );

  				}

  			}

  			geometry.bones = json.bones;

  			if ( geometry.bones && geometry.bones.length > 0 && ( geometry.skinWeights.length !== geometry.skinIndices.length || geometry.skinIndices.length !== geometry.vertices.length ) ) {

  				console.warn( 'When skinning, number of vertices (' + geometry.vertices.length + '), skinIndices (' +
  					geometry.skinIndices.length + '), and skinWeights (' + geometry.skinWeights.length + ') should match.' );

  			}

  		}

  		function parseMorphing( scale ) {

  			if ( json.morphTargets !== undefined ) {

  				for ( var i = 0, l = json.morphTargets.length; i < l; i ++ ) {

  					geometry.morphTargets[ i ] = {};
  					geometry.morphTargets[ i ].name = json.morphTargets[ i ].name;
  					geometry.morphTargets[ i ].vertices = [];

  					var dstVertices = geometry.morphTargets[ i ].vertices;
  					var srcVertices = json.morphTargets[ i ].vertices;

  					for ( var v = 0, vl = srcVertices.length; v < vl; v += 3 ) {

  						var vertex = new Vector3();
  						vertex.x = srcVertices[ v ] * scale;
  						vertex.y = srcVertices[ v + 1 ] * scale;
  						vertex.z = srcVertices[ v + 2 ] * scale;

  						dstVertices.push( vertex );

  					}

  				}

  			}

  			if ( json.morphColors !== undefined && json.morphColors.length > 0 ) {

  				console.warn( 'THREE.JSONLoader: "morphColors" no longer supported. Using them as face colors.' );

  				var faces = geometry.faces;
  				var morphColors = json.morphColors[ 0 ].colors;

  				for ( var i = 0, l = faces.length; i < l; i ++ ) {

  					faces[ i ].color.fromArray( morphColors, i * 3 );

  				}

  			}

  		}

  		function parseAnimations() {

  			var outputAnimations = [];

  			// parse old style Bone/Hierarchy animations
  			var animations = [];

  			if ( json.animation !== undefined ) {

  				animations.push( json.animation );

  			}

  			if ( json.animations !== undefined ) {

  				if ( json.animations.length ) {

  					animations = animations.concat( json.animations );

  				} else {

  					animations.push( json.animations );

  				}

  			}

  			for ( var i = 0; i < animations.length; i ++ ) {

  				var clip = AnimationClip.parseAnimation( animations[ i ], geometry.bones );
  				if ( clip ) outputAnimations.push( clip );

  			}

  			// parse implicit morph animations
  			if ( geometry.morphTargets ) {

  				// TODO: Figure out what an appropraite FPS is for morph target animations -- defaulting to 10, but really it is completely arbitrary.
  				var morphAnimationClips = AnimationClip.CreateClipsFromMorphTargetSequences( geometry.morphTargets, 10 );
  				outputAnimations = outputAnimations.concat( morphAnimationClips );

  			}

  			if ( outputAnimations.length > 0 ) geometry.animations = outputAnimations;

  		}

  		if ( json.materials === undefined || json.materials.length === 0 ) {

  			return { geometry: geometry };

  		} else {

  			var materials = Loader.prototype.initMaterials( json.materials, texturePath, this.crossOrigin );

  			return { geometry: geometry, materials: materials };

  		}

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function ObjectLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;
  	this.texturePath = '';

  };

  Object.assign( ObjectLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		if ( this.texturePath === '' ) {

  			this.texturePath = url.substring( 0, url.lastIndexOf( '/' ) + 1 );

  		}

  		var scope = this;

  		var loader = new XHRLoader( scope.manager );
  		loader.load( url, function ( text ) {

  			scope.parse( JSON.parse( text ), onLoad );

  		}, onProgress, onError );

  	},

  	setTexturePath: function ( value ) {

  		this.texturePath = value;

  	},

  	setCrossOrigin: function ( value ) {

  		this.crossOrigin = value;

  	},

  	parse: function ( json, onLoad ) {

  		var geometries = this.parseGeometries( json.geometries );

  		var images = this.parseImages( json.images, function () {

  			if ( onLoad !== undefined ) onLoad( object );

  		} );

  		var textures  = this.parseTextures( json.textures, images );
  		var materials = this.parseMaterials( json.materials, textures );

  		var object = this.parseObject( json.object, geometries, materials );

  		if ( json.animations ) {

  			object.animations = this.parseAnimations( json.animations );

  		}

  		if ( json.images === undefined || json.images.length === 0 ) {

  			if ( onLoad !== undefined ) onLoad( object );

  		}

  		return object;

  	},

  	parseGeometries: function ( json ) {

  		var geometries = {};

  		if ( json !== undefined ) {

  			var geometryLoader = new JSONLoader();
  			var bufferGeometryLoader = new BufferGeometryLoader();

  			for ( var i = 0, l = json.length; i < l; i ++ ) {

  				var geometry;
  				var data = json[ i ];

  				switch ( data.type ) {

  					case 'PlaneGeometry':
  					case 'PlaneBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.width,
  							data.height,
  							data.widthSegments,
  							data.heightSegments
  						);

  						break;

  					case 'BoxGeometry':
  					case 'BoxBufferGeometry':
  					case 'CubeGeometry': // backwards compatible

  						geometry = new THREE[ data.type ](
  							data.width,
  							data.height,
  							data.depth,
  							data.widthSegments,
  							data.heightSegments,
  							data.depthSegments
  						);

  						break;

  					case 'CircleGeometry':
  					case 'CircleBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.radius,
  							data.segments,
  							data.thetaStart,
  							data.thetaLength
  						);

  						break;

  					case 'CylinderGeometry':
  					case 'CylinderBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.radiusTop,
  							data.radiusBottom,
  							data.height,
  							data.radialSegments,
  							data.heightSegments,
  							data.openEnded,
  							data.thetaStart,
  							data.thetaLength
  						);

  						break;

  					case 'ConeGeometry':
  					case 'ConeBufferGeometry':

  						geometry = new THREE [ data.type ](
  							data.radius,
  							data.height,
  							data.radialSegments,
  							data.heightSegments,
  							data.openEnded,
  							data.thetaStart,
  							data.thetaLength
  						);

  						break;

  					case 'SphereGeometry':
  					case 'SphereBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.radius,
  							data.widthSegments,
  							data.heightSegments,
  							data.phiStart,
  							data.phiLength,
  							data.thetaStart,
  							data.thetaLength
  						);

  						break;

  					case 'DodecahedronGeometry':
  					case 'IcosahedronGeometry':
  					case 'OctahedronGeometry':
  					case 'TetrahedronGeometry':

  						geometry = new THREE[ data.type ](
  							data.radius,
  							data.detail
  						);

  						break;

  					case 'RingGeometry':
  					case 'RingBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.innerRadius,
  							data.outerRadius,
  							data.thetaSegments,
  							data.phiSegments,
  							data.thetaStart,
  							data.thetaLength
  						);

  						break;

  					case 'TorusGeometry':
  					case 'TorusBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.radius,
  							data.tube,
  							data.radialSegments,
  							data.tubularSegments,
  							data.arc
  						);

  						break;

  					case 'TorusKnotGeometry':
  					case 'TorusKnotBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.radius,
  							data.tube,
  							data.tubularSegments,
  							data.radialSegments,
  							data.p,
  							data.q
  						);

  						break;

  					case 'LatheGeometry':
  					case 'LatheBufferGeometry':

  						geometry = new THREE[ data.type ](
  							data.points,
  							data.segments,
  							data.phiStart,
  							data.phiLength
  						);

  						break;

  					case 'BufferGeometry':

  						geometry = bufferGeometryLoader.parse( data );

  						break;

  					case 'Geometry':

  						geometry = geometryLoader.parse( data.data, this.texturePath ).geometry;

  						break;

  					default:

  						console.warn( 'THREE.ObjectLoader: Unsupported geometry type "' + data.type + '"' );

  						continue;

  				}

  				geometry.uuid = data.uuid;

  				if ( data.name !== undefined ) geometry.name = data.name;

  				geometries[ data.uuid ] = geometry;

  			}

  		}

  		return geometries;

  	},

  	parseMaterials: function ( json, textures ) {

  		var materials = {};

  		if ( json !== undefined ) {

  			var loader = new MaterialLoader();
  			loader.setTextures( textures );

  			for ( var i = 0, l = json.length; i < l; i ++ ) {

  				var material = loader.parse( json[ i ] );
  				materials[ material.uuid ] = material;

  			}

  		}

  		return materials;

  	},

  	parseAnimations: function ( json ) {

  		var animations = [];

  		for ( var i = 0; i < json.length; i ++ ) {

  			var clip = AnimationClip.parse( json[ i ] );

  			animations.push( clip );

  		}

  		return animations;

  	},

  	parseImages: function ( json, onLoad ) {

  		var scope = this;
  		var images = {};

  		function loadImage( url ) {

  			scope.manager.itemStart( url );

  			return loader.load( url, function () {

  				scope.manager.itemEnd( url );

  			} );

  		}

  		if ( json !== undefined && json.length > 0 ) {

  			var manager = new LoadingManager( onLoad );

  			var loader = new ImageLoader( manager );
  			loader.setCrossOrigin( this.crossOrigin );

  			for ( var i = 0, l = json.length; i < l; i ++ ) {

  				var image = json[ i ];
  				var path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( image.url ) ? image.url : scope.texturePath + image.url;

  				images[ image.uuid ] = loadImage( path );

  			}

  		}

  		return images;

  	},

  	parseTextures: function ( json, images ) {

  		function parseConstant( value ) {

  			if ( typeof( value ) === 'number' ) return value;

  			console.warn( 'THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value );

  			return THREE[ value ];

  		}

  		var textures = {};

  		if ( json !== undefined ) {

  			for ( var i = 0, l = json.length; i < l; i ++ ) {

  				var data = json[ i ];

  				if ( data.image === undefined ) {

  					console.warn( 'THREE.ObjectLoader: No "image" specified for', data.uuid );

  				}

  				if ( images[ data.image ] === undefined ) {

  					console.warn( 'THREE.ObjectLoader: Undefined image', data.image );

  				}

  				var texture = new Texture( images[ data.image ] );
  				texture.needsUpdate = true;

  				texture.uuid = data.uuid;

  				if ( data.name !== undefined ) texture.name = data.name;

  				if ( data.mapping !== undefined ) texture.mapping = parseConstant( data.mapping );

  				if ( data.offset !== undefined ) texture.offset.fromArray( data.offset );
  				if ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );
  				if ( data.wrap !== undefined ) {

  					texture.wrapS = parseConstant( data.wrap[ 0 ] );
  					texture.wrapT = parseConstant( data.wrap[ 1 ] );

  				}

  				if ( data.minFilter !== undefined ) texture.minFilter = parseConstant( data.minFilter );
  				if ( data.magFilter !== undefined ) texture.magFilter = parseConstant( data.magFilter );
  				if ( data.anisotropy !== undefined ) texture.anisotropy = data.anisotropy;

  				if ( data.flipY !== undefined ) texture.flipY = data.flipY;

  				textures[ data.uuid ] = texture;

  			}

  		}

  		return textures;

  	},

  	parseObject: function () {

  		var matrix = new Matrix4();

  		return function parseObject( data, geometries, materials ) {

  			var object;

  			function getGeometry( name ) {

  				if ( geometries[ name ] === undefined ) {

  					console.warn( 'THREE.ObjectLoader: Undefined geometry', name );

  				}

  				return geometries[ name ];

  			}

  			function getMaterial( name ) {

  				if ( name === undefined ) return undefined;

  				if ( materials[ name ] === undefined ) {

  					console.warn( 'THREE.ObjectLoader: Undefined material', name );

  				}

  				return materials[ name ];

  			}

  			switch ( data.type ) {

  				case 'Scene':

  					object = new Scene();

  					break;

  				case 'PerspectiveCamera':

  					object = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );

  					if ( data.focus !== undefined ) object.focus = data.focus;
  					if ( data.zoom !== undefined ) object.zoom = data.zoom;
  					if ( data.filmGauge !== undefined ) object.filmGauge = data.filmGauge;
  					if ( data.filmOffset !== undefined ) object.filmOffset = data.filmOffset;
  					if ( data.view !== undefined ) object.view = Object.assign( {}, data.view );

  					break;

  				case 'OrthographicCamera':

  					object = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );

  					break;

  				case 'AmbientLight':

  					object = new AmbientLight( data.color, data.intensity );

  					break;

  				case 'DirectionalLight':

  					object = new DirectionalLight( data.color, data.intensity );

  					break;

  				case 'PointLight':

  					object = new PointLight( data.color, data.intensity, data.distance, data.decay );

  					break;

  				case 'SpotLight':

  					object = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );

  					break;

  				case 'HemisphereLight':

  					object = new HemisphereLight( data.color, data.groundColor, data.intensity );

  					break;

  				case 'Mesh':

  					var geometry = getGeometry( data.geometry );
  					var material = getMaterial( data.material );

  					if ( geometry.bones && geometry.bones.length > 0 ) {

  						object = new SkinnedMesh( geometry, material );

  					} else {

  						object = new Mesh( geometry, material );

  					}

  					break;

  				case 'LOD':

  					object = new LOD();

  					break;

  				case 'Line':

  					object = new Line( getGeometry( data.geometry ), getMaterial( data.material ), data.mode );

  					break;

  				case 'LineSegments':

  					object = new THREE.LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );

  					break;

  				case 'PointCloud':
  				case 'Points':

  					object = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );

  					break;

  				case 'Sprite':

  					object = new Sprite( getMaterial( data.material ) );

  					break;

  				case 'Group':

  					object = new Group();

  					break;

  				default:

  					object = new Object3D();

  			}

  			object.uuid = data.uuid;

  			if ( data.name !== undefined ) object.name = data.name;
  			if ( data.matrix !== undefined ) {

  				matrix.fromArray( data.matrix );
  				matrix.decompose( object.position, object.quaternion, object.scale );

  			} else {

  				if ( data.position !== undefined ) object.position.fromArray( data.position );
  				if ( data.rotation !== undefined ) object.rotation.fromArray( data.rotation );
  				if ( data.quaternion !== undefined ) object.quaternion.fromArray( data.quaternion );
  				if ( data.scale !== undefined ) object.scale.fromArray( data.scale );

  			}

  			if ( data.castShadow !== undefined ) object.castShadow = data.castShadow;
  			if ( data.receiveShadow !== undefined ) object.receiveShadow = data.receiveShadow;

  			if ( data.visible !== undefined ) object.visible = data.visible;
  			if ( data.userData !== undefined ) object.userData = data.userData;

  			if ( data.children !== undefined ) {

  				for ( var child in data.children ) {

  					object.add( this.parseObject( data.children[ child ], geometries, materials ) );

  				}

  			}

  			if ( data.type === 'LOD' ) {

  				var levels = data.levels;

  				for ( var l = 0; l < levels.length; l ++ ) {

  					var level = levels[ l ];
  					var child = object.getObjectByProperty( 'uuid', level.object );

  					if ( child !== undefined ) {

  						object.addLevel( child, level.distance );

  					}

  				}

  			}

  			return object;

  		};

  	}()

  } );

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   */

  exports.ShapeUtils = {

  	// calculate area of the contour polygon

  	area: function ( contour ) {

  		var n = contour.length;
  		var a = 0.0;

  		for ( var p = n - 1, q = 0; q < n; p = q ++ ) {

  			a += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;

  		}

  		return a * 0.5;

  	},

  	triangulate: ( function () {

  		/**
  		 * This code is a quick port of code written in C++ which was submitted to
  		 * flipcode.com by John W. Ratcliff  // July 22, 2000
  		 * See original code and more information here:
  		 * http://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml
  		 *
  		 * ported to actionscript by Zevan Rosser
  		 * www.actionsnippet.com
  		 *
  		 * ported to javascript by Joshua Koo
  		 * http://www.lab4games.net/zz85/blog
  		 *
  		 */

  		function snip( contour, u, v, w, n, verts ) {

  			var p;
  			var ax, ay, bx, by;
  			var cx, cy, px, py;

  			ax = contour[ verts[ u ] ].x;
  			ay = contour[ verts[ u ] ].y;

  			bx = contour[ verts[ v ] ].x;
  			by = contour[ verts[ v ] ].y;

  			cx = contour[ verts[ w ] ].x;
  			cy = contour[ verts[ w ] ].y;

  			if ( Number.EPSILON > ( ( ( bx - ax ) * ( cy - ay ) ) - ( ( by - ay ) * ( cx - ax ) ) ) ) return false;

  			var aX, aY, bX, bY, cX, cY;
  			var apx, apy, bpx, bpy, cpx, cpy;
  			var cCROSSap, bCROSScp, aCROSSbp;

  			aX = cx - bx;  aY = cy - by;
  			bX = ax - cx;  bY = ay - cy;
  			cX = bx - ax;  cY = by - ay;

  			for ( p = 0; p < n; p ++ ) {

  				px = contour[ verts[ p ] ].x;
  				py = contour[ verts[ p ] ].y;

  				if ( ( ( px === ax ) && ( py === ay ) ) ||
  					 ( ( px === bx ) && ( py === by ) ) ||
  					 ( ( px === cx ) && ( py === cy ) ) )	continue;

  				apx = px - ax;  apy = py - ay;
  				bpx = px - bx;  bpy = py - by;
  				cpx = px - cx;  cpy = py - cy;

  				// see if p is inside triangle abc

  				aCROSSbp = aX * bpy - aY * bpx;
  				cCROSSap = cX * apy - cY * apx;
  				bCROSScp = bX * cpy - bY * cpx;

  				if ( ( aCROSSbp >= - Number.EPSILON ) && ( bCROSScp >= - Number.EPSILON ) && ( cCROSSap >= - Number.EPSILON ) ) return false;

  			}

  			return true;

  		}

  		// takes in an contour array and returns

  		return function triangulate( contour, indices ) {

  			var n = contour.length;

  			if ( n < 3 ) return null;

  			var result = [],
  				verts = [],
  				vertIndices = [];

  			/* we want a counter-clockwise polygon in verts */

  			var u, v, w;

  			if ( exports.ShapeUtils.area( contour ) > 0.0 ) {

  				for ( v = 0; v < n; v ++ ) verts[ v ] = v;

  			} else {

  				for ( v = 0; v < n; v ++ ) verts[ v ] = ( n - 1 ) - v;

  			}

  			var nv = n;

  			/*  remove nv - 2 vertices, creating 1 triangle every time */

  			var count = 2 * nv;   /* error detection */

  			for ( v = nv - 1; nv > 2; ) {

  				/* if we loop, it is probably a non-simple polygon */

  				if ( ( count -- ) <= 0 ) {

  					//** Triangulate: ERROR - probable bad polygon!

  					//throw ( "Warning, unable to triangulate polygon!" );
  					//return null;
  					// Sometimes warning is fine, especially polygons are triangulated in reverse.
  					console.warn( 'THREE.ShapeUtils: Unable to triangulate polygon! in triangulate()' );

  					if ( indices ) return vertIndices;
  					return result;

  				}

  				/* three consecutive vertices in current polygon, <u,v,w> */

  				u = v; 	 	if ( nv <= u ) u = 0;     /* previous */
  				v = u + 1;  if ( nv <= v ) v = 0;     /* new v    */
  				w = v + 1;  if ( nv <= w ) w = 0;     /* next     */

  				if ( snip( contour, u, v, w, nv, verts ) ) {

  					var a, b, c, s, t;

  					/* true names of the vertices */

  					a = verts[ u ];
  					b = verts[ v ];
  					c = verts[ w ];

  					/* output Triangle */

  					result.push( [ contour[ a ],
  						contour[ b ],
  						contour[ c ] ] );


  					vertIndices.push( [ verts[ u ], verts[ v ], verts[ w ] ] );

  					/* remove v from the remaining polygon */

  					for ( s = v, t = v + 1; t < nv; s ++, t ++ ) {

  						verts[ s ] = verts[ t ];

  					}

  					nv --;

  					/* reset error detection counter */

  					count = 2 * nv;

  				}

  			}

  			if ( indices ) return vertIndices;
  			return result;

  		}

  	} )(),

  	triangulateShape: function ( contour, holes ) {

  		function removeDupEndPts(points) {

  			var l = points.length;

  			if ( l > 2 && points[ l - 1 ].equals( points[ 0 ] ) ) {

  				points.pop();

  			}

  		}

  		removeDupEndPts( contour );
  		holes.forEach( removeDupEndPts );

  		function point_in_segment_2D_colin( inSegPt1, inSegPt2, inOtherPt ) {

  			// inOtherPt needs to be collinear to the inSegment
  			if ( inSegPt1.x !== inSegPt2.x ) {

  				if ( inSegPt1.x < inSegPt2.x ) {

  					return	( ( inSegPt1.x <= inOtherPt.x ) && ( inOtherPt.x <= inSegPt2.x ) );

  				} else {

  					return	( ( inSegPt2.x <= inOtherPt.x ) && ( inOtherPt.x <= inSegPt1.x ) );

  				}

  			} else {

  				if ( inSegPt1.y < inSegPt2.y ) {

  					return	( ( inSegPt1.y <= inOtherPt.y ) && ( inOtherPt.y <= inSegPt2.y ) );

  				} else {

  					return	( ( inSegPt2.y <= inOtherPt.y ) && ( inOtherPt.y <= inSegPt1.y ) );

  				}

  			}

  		}

  		function intersect_segments_2D( inSeg1Pt1, inSeg1Pt2, inSeg2Pt1, inSeg2Pt2, inExcludeAdjacentSegs ) {

  			var seg1dx = inSeg1Pt2.x - inSeg1Pt1.x,   seg1dy = inSeg1Pt2.y - inSeg1Pt1.y;
  			var seg2dx = inSeg2Pt2.x - inSeg2Pt1.x,   seg2dy = inSeg2Pt2.y - inSeg2Pt1.y;

  			var seg1seg2dx = inSeg1Pt1.x - inSeg2Pt1.x;
  			var seg1seg2dy = inSeg1Pt1.y - inSeg2Pt1.y;

  			var limit		= seg1dy * seg2dx - seg1dx * seg2dy;
  			var perpSeg1	= seg1dy * seg1seg2dx - seg1dx * seg1seg2dy;

  			if ( Math.abs( limit ) > Number.EPSILON ) {

  				// not parallel

  				var perpSeg2;
  				if ( limit > 0 ) {

  					if ( ( perpSeg1 < 0 ) || ( perpSeg1 > limit ) ) 		return [];
  					perpSeg2 = seg2dy * seg1seg2dx - seg2dx * seg1seg2dy;
  					if ( ( perpSeg2 < 0 ) || ( perpSeg2 > limit ) ) 		return [];

  				} else {

  					if ( ( perpSeg1 > 0 ) || ( perpSeg1 < limit ) ) 		return [];
  					perpSeg2 = seg2dy * seg1seg2dx - seg2dx * seg1seg2dy;
  					if ( ( perpSeg2 > 0 ) || ( perpSeg2 < limit ) ) 		return [];

  				}

  				// i.e. to reduce rounding errors
  				// intersection at endpoint of segment#1?
  				if ( perpSeg2 === 0 ) {

  					if ( ( inExcludeAdjacentSegs ) &&
  						 ( ( perpSeg1 === 0 ) || ( perpSeg1 === limit ) ) )		return [];
  					return [ inSeg1Pt1 ];

  				}
  				if ( perpSeg2 === limit ) {

  					if ( ( inExcludeAdjacentSegs ) &&
  						 ( ( perpSeg1 === 0 ) || ( perpSeg1 === limit ) ) )		return [];
  					return [ inSeg1Pt2 ];

  				}
  				// intersection at endpoint of segment#2?
  				if ( perpSeg1 === 0 )		return [ inSeg2Pt1 ];
  				if ( perpSeg1 === limit )	return [ inSeg2Pt2 ];

  				// return real intersection point
  				var factorSeg1 = perpSeg2 / limit;
  				return	[ { x: inSeg1Pt1.x + factorSeg1 * seg1dx,
  							y: inSeg1Pt1.y + factorSeg1 * seg1dy } ];

  			} else {

  				// parallel or collinear
  				if ( ( perpSeg1 !== 0 ) ||
  					 ( seg2dy * seg1seg2dx !== seg2dx * seg1seg2dy ) ) 			return [];

  				// they are collinear or degenerate
  				var seg1Pt = ( ( seg1dx === 0 ) && ( seg1dy === 0 ) );	// segment1 is just a point?
  				var seg2Pt = ( ( seg2dx === 0 ) && ( seg2dy === 0 ) );	// segment2 is just a point?
  				// both segments are points
  				if ( seg1Pt && seg2Pt ) {

  					if ( ( inSeg1Pt1.x !== inSeg2Pt1.x ) ||
  						 ( inSeg1Pt1.y !== inSeg2Pt1.y ) )		return [];	// they are distinct  points
  					return [ inSeg1Pt1 ];                 						// they are the same point

  				}
  				// segment#1  is a single point
  				if ( seg1Pt ) {

  					if ( ! point_in_segment_2D_colin( inSeg2Pt1, inSeg2Pt2, inSeg1Pt1 ) )		return [];		// but not in segment#2
  					return [ inSeg1Pt1 ];

  				}
  				// segment#2  is a single point
  				if ( seg2Pt ) {

  					if ( ! point_in_segment_2D_colin( inSeg1Pt1, inSeg1Pt2, inSeg2Pt1 ) )		return [];		// but not in segment#1
  					return [ inSeg2Pt1 ];

  				}

  				// they are collinear segments, which might overlap
  				var seg1min, seg1max, seg1minVal, seg1maxVal;
  				var seg2min, seg2max, seg2minVal, seg2maxVal;
  				if ( seg1dx !== 0 ) {

  					// the segments are NOT on a vertical line
  					if ( inSeg1Pt1.x < inSeg1Pt2.x ) {

  						seg1min = inSeg1Pt1; seg1minVal = inSeg1Pt1.x;
  						seg1max = inSeg1Pt2; seg1maxVal = inSeg1Pt2.x;

  					} else {

  						seg1min = inSeg1Pt2; seg1minVal = inSeg1Pt2.x;
  						seg1max = inSeg1Pt1; seg1maxVal = inSeg1Pt1.x;

  					}
  					if ( inSeg2Pt1.x < inSeg2Pt2.x ) {

  						seg2min = inSeg2Pt1; seg2minVal = inSeg2Pt1.x;
  						seg2max = inSeg2Pt2; seg2maxVal = inSeg2Pt2.x;

  					} else {

  						seg2min = inSeg2Pt2; seg2minVal = inSeg2Pt2.x;
  						seg2max = inSeg2Pt1; seg2maxVal = inSeg2Pt1.x;

  					}

  				} else {

  					// the segments are on a vertical line
  					if ( inSeg1Pt1.y < inSeg1Pt2.y ) {

  						seg1min = inSeg1Pt1; seg1minVal = inSeg1Pt1.y;
  						seg1max = inSeg1Pt2; seg1maxVal = inSeg1Pt2.y;

  					} else {

  						seg1min = inSeg1Pt2; seg1minVal = inSeg1Pt2.y;
  						seg1max = inSeg1Pt1; seg1maxVal = inSeg1Pt1.y;

  					}
  					if ( inSeg2Pt1.y < inSeg2Pt2.y ) {

  						seg2min = inSeg2Pt1; seg2minVal = inSeg2Pt1.y;
  						seg2max = inSeg2Pt2; seg2maxVal = inSeg2Pt2.y;

  					} else {

  						seg2min = inSeg2Pt2; seg2minVal = inSeg2Pt2.y;
  						seg2max = inSeg2Pt1; seg2maxVal = inSeg2Pt1.y;

  					}

  				}
  				if ( seg1minVal <= seg2minVal ) {

  					if ( seg1maxVal <  seg2minVal )	return [];
  					if ( seg1maxVal === seg2minVal )	{

  						if ( inExcludeAdjacentSegs )		return [];
  						return [ seg2min ];

  					}
  					if ( seg1maxVal <= seg2maxVal )	return [ seg2min, seg1max ];
  					return	[ seg2min, seg2max ];

  				} else {

  					if ( seg1minVal >  seg2maxVal )	return [];
  					if ( seg1minVal === seg2maxVal )	{

  						if ( inExcludeAdjacentSegs )		return [];
  						return [ seg1min ];

  					}
  					if ( seg1maxVal <= seg2maxVal )	return [ seg1min, seg1max ];
  					return	[ seg1min, seg2max ];

  				}

  			}

  		}

  		function isPointInsideAngle( inVertex, inLegFromPt, inLegToPt, inOtherPt ) {

  			// The order of legs is important

  			// translation of all points, so that Vertex is at (0,0)
  			var legFromPtX	= inLegFromPt.x - inVertex.x,  legFromPtY	= inLegFromPt.y - inVertex.y;
  			var legToPtX	= inLegToPt.x	- inVertex.x,  legToPtY		= inLegToPt.y	- inVertex.y;
  			var otherPtX	= inOtherPt.x	- inVertex.x,  otherPtY		= inOtherPt.y	- inVertex.y;

  			// main angle >0: < 180 deg.; 0: 180 deg.; <0: > 180 deg.
  			var from2toAngle	= legFromPtX * legToPtY - legFromPtY * legToPtX;
  			var from2otherAngle	= legFromPtX * otherPtY - legFromPtY * otherPtX;

  			if ( Math.abs( from2toAngle ) > Number.EPSILON ) {

  				// angle != 180 deg.

  				var other2toAngle		= otherPtX * legToPtY - otherPtY * legToPtX;
  				// console.log( "from2to: " + from2toAngle + ", from2other: " + from2otherAngle + ", other2to: " + other2toAngle );

  				if ( from2toAngle > 0 ) {

  					// main angle < 180 deg.
  					return	( ( from2otherAngle >= 0 ) && ( other2toAngle >= 0 ) );

  				} else {

  					// main angle > 180 deg.
  					return	( ( from2otherAngle >= 0 ) || ( other2toAngle >= 0 ) );

  				}

  			} else {

  				// angle == 180 deg.
  				// console.log( "from2to: 180 deg., from2other: " + from2otherAngle  );
  				return	( from2otherAngle > 0 );

  			}

  		}


  		function removeHoles( contour, holes ) {

  			var shape = contour.concat(); // work on this shape
  			var hole;

  			function isCutLineInsideAngles( inShapeIdx, inHoleIdx ) {

  				// Check if hole point lies within angle around shape point
  				var lastShapeIdx = shape.length - 1;

  				var prevShapeIdx = inShapeIdx - 1;
  				if ( prevShapeIdx < 0 )			prevShapeIdx = lastShapeIdx;

  				var nextShapeIdx = inShapeIdx + 1;
  				if ( nextShapeIdx > lastShapeIdx )	nextShapeIdx = 0;

  				var insideAngle = isPointInsideAngle( shape[ inShapeIdx ], shape[ prevShapeIdx ], shape[ nextShapeIdx ], hole[ inHoleIdx ] );
  				if ( ! insideAngle ) {

  					// console.log( "Vertex (Shape): " + inShapeIdx + ", Point: " + hole[inHoleIdx].x + "/" + hole[inHoleIdx].y );
  					return	false;

  				}

  				// Check if shape point lies within angle around hole point
  				var lastHoleIdx = hole.length - 1;

  				var prevHoleIdx = inHoleIdx - 1;
  				if ( prevHoleIdx < 0 )			prevHoleIdx = lastHoleIdx;

  				var nextHoleIdx = inHoleIdx + 1;
  				if ( nextHoleIdx > lastHoleIdx )	nextHoleIdx = 0;

  				insideAngle = isPointInsideAngle( hole[ inHoleIdx ], hole[ prevHoleIdx ], hole[ nextHoleIdx ], shape[ inShapeIdx ] );
  				if ( ! insideAngle ) {

  					// console.log( "Vertex (Hole): " + inHoleIdx + ", Point: " + shape[inShapeIdx].x + "/" + shape[inShapeIdx].y );
  					return	false;

  				}

  				return	true;

  			}

  			function intersectsShapeEdge( inShapePt, inHolePt ) {

  				// checks for intersections with shape edges
  				var sIdx, nextIdx, intersection;
  				for ( sIdx = 0; sIdx < shape.length; sIdx ++ ) {

  					nextIdx = sIdx + 1; nextIdx %= shape.length;
  					intersection = intersect_segments_2D( inShapePt, inHolePt, shape[ sIdx ], shape[ nextIdx ], true );
  					if ( intersection.length > 0 )		return	true;

  				}

  				return	false;

  			}

  			var indepHoles = [];

  			function intersectsHoleEdge( inShapePt, inHolePt ) {

  				// checks for intersections with hole edges
  				var ihIdx, chkHole,
  					hIdx, nextIdx, intersection;
  				for ( ihIdx = 0; ihIdx < indepHoles.length; ihIdx ++ ) {

  					chkHole = holes[ indepHoles[ ihIdx ]];
  					for ( hIdx = 0; hIdx < chkHole.length; hIdx ++ ) {

  						nextIdx = hIdx + 1; nextIdx %= chkHole.length;
  						intersection = intersect_segments_2D( inShapePt, inHolePt, chkHole[ hIdx ], chkHole[ nextIdx ], true );
  						if ( intersection.length > 0 )		return	true;

  					}

  				}
  				return	false;

  			}

  			var holeIndex, shapeIndex,
  				shapePt, holePt,
  				holeIdx, cutKey, failedCuts = [],
  				tmpShape1, tmpShape2,
  				tmpHole1, tmpHole2;

  			for ( var h = 0, hl = holes.length; h < hl; h ++ ) {

  				indepHoles.push( h );

  			}

  			var minShapeIndex = 0;
  			var counter = indepHoles.length * 2;
  			while ( indepHoles.length > 0 ) {

  				counter --;
  				if ( counter < 0 ) {

  					console.log( "Infinite Loop! Holes left:" + indepHoles.length + ", Probably Hole outside Shape!" );
  					break;

  				}

  				// search for shape-vertex and hole-vertex,
  				// which can be connected without intersections
  				for ( shapeIndex = minShapeIndex; shapeIndex < shape.length; shapeIndex ++ ) {

  					shapePt = shape[ shapeIndex ];
  					holeIndex	= - 1;

  					// search for hole which can be reached without intersections
  					for ( var h = 0; h < indepHoles.length; h ++ ) {

  						holeIdx = indepHoles[ h ];

  						// prevent multiple checks
  						cutKey = shapePt.x + ":" + shapePt.y + ":" + holeIdx;
  						if ( failedCuts[ cutKey ] !== undefined )			continue;

  						hole = holes[ holeIdx ];
  						for ( var h2 = 0; h2 < hole.length; h2 ++ ) {

  							holePt = hole[ h2 ];
  							if ( ! isCutLineInsideAngles( shapeIndex, h2 ) )		continue;
  							if ( intersectsShapeEdge( shapePt, holePt ) )		continue;
  							if ( intersectsHoleEdge( shapePt, holePt ) )		continue;

  							holeIndex = h2;
  							indepHoles.splice( h, 1 );

  							tmpShape1 = shape.slice( 0, shapeIndex + 1 );
  							tmpShape2 = shape.slice( shapeIndex );
  							tmpHole1 = hole.slice( holeIndex );
  							tmpHole2 = hole.slice( 0, holeIndex + 1 );

  							shape = tmpShape1.concat( tmpHole1 ).concat( tmpHole2 ).concat( tmpShape2 );

  							minShapeIndex = shapeIndex;

  							// Debug only, to show the selected cuts
  							// glob_CutLines.push( [ shapePt, holePt ] );

  							break;

  						}
  						if ( holeIndex >= 0 )	break;		// hole-vertex found

  						failedCuts[ cutKey ] = true;			// remember failure

  					}
  					if ( holeIndex >= 0 )	break;		// hole-vertex found

  				}

  			}

  			return shape; 			/* shape with no holes */

  		}


  		var i, il, f, face,
  			key, index,
  			allPointsMap = {};

  		// To maintain reference to old shape, one must match coordinates, or offset the indices from original arrays. It's probably easier to do the first.

  		var allpoints = contour.concat();

  		for ( var h = 0, hl = holes.length; h < hl; h ++ ) {

  			Array.prototype.push.apply( allpoints, holes[ h ] );

  		}

  		//console.log( "allpoints",allpoints, allpoints.length );

  		// prepare all points map

  		for ( i = 0, il = allpoints.length; i < il; i ++ ) {

  			key = allpoints[ i ].x + ":" + allpoints[ i ].y;

  			if ( allPointsMap[ key ] !== undefined ) {

  				console.warn( "THREE.ShapeUtils: Duplicate point", key, i );

  			}

  			allPointsMap[ key ] = i;

  		}

  		// remove holes by cutting paths to holes and adding them to the shape
  		var shapeWithoutHoles = removeHoles( contour, holes );

  		var triangles = exports.ShapeUtils.triangulate( shapeWithoutHoles, false ); // True returns indices for points of spooled shape
  		//console.log( "triangles",triangles, triangles.length );

  		// check all face vertices against all points map

  		for ( i = 0, il = triangles.length; i < il; i ++ ) {

  			face = triangles[ i ];

  			for ( f = 0; f < 3; f ++ ) {

  				key = face[ f ].x + ":" + face[ f ].y;

  				index = allPointsMap[ key ];

  				if ( index !== undefined ) {

  					face[ f ] = index;

  				}

  			}

  		}

  		return triangles.concat();

  	},

  	isClockWise: function ( pts ) {

  		return exports.ShapeUtils.area( pts ) < 0;

  	},

  	// Bezier Curves formulas obtained from
  	// http://en.wikipedia.org/wiki/B%C3%A9zier_curve

  	// Quad Bezier Functions

  	b2: ( function () {

  		function b2p0( t, p ) {

  			var k = 1 - t;
  			return k * k * p;

  		}

  		function b2p1( t, p ) {

  			return 2 * ( 1 - t ) * t * p;

  		}

  		function b2p2( t, p ) {

  			return t * t * p;

  		}

  		return function b2( t, p0, p1, p2 ) {

  			return b2p0( t, p0 ) + b2p1( t, p1 ) + b2p2( t, p2 );

  		};

  	} )(),

  	// Cubic Bezier Functions

  	b3: ( function () {

  		function b3p0( t, p ) {

  			var k = 1 - t;
  			return k * k * k * p;

  		}

  		function b3p1( t, p ) {

  			var k = 1 - t;
  			return 3 * k * k * t * p;

  		}

  		function b3p2( t, p ) {

  			var k = 1 - t;
  			return 3 * k * t * t * p;

  		}

  		function b3p3( t, p ) {

  			return t * t * t * p;

  		}

  		return function b3( t, p0, p1, p2, p3 ) {

  			return b3p0( t, p0 ) + b3p1( t, p1 ) + b3p2( t, p2 ) + b3p3( t, p3 );

  		};

  	} )()

  };

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * Extensible curve object
   *
   * Some common of Curve methods
   * .getPoint(t), getTangent(t)
   * .getPointAt(u), getTagentAt(u)
   * .getPoints(), .getSpacedPoints()
   * .getLength()
   * .updateArcLengths()
   *
   * This following classes subclasses THREE.Curve:
   *
   * -- 2d classes --
   * THREE.LineCurve
   * THREE.QuadraticBezierCurve
   * THREE.CubicBezierCurve
   * THREE.SplineCurve
   * THREE.ArcCurve
   * THREE.EllipseCurve
   *
   * -- 3d classes --
   * THREE.LineCurve3
   * THREE.QuadraticBezierCurve3
   * THREE.CubicBezierCurve3
   * THREE.SplineCurve3
   *
   * A series of curves can be represented as a THREE.CurvePath
   *
   **/

  /**************************************************************
   *	Abstract Curve base class
   **************************************************************/

  function Curve() {}

  Curve.prototype = {

  	constructor: Curve,

  	// Virtual base class method to overwrite and implement in subclasses
  	//	- t [0 .. 1]

  	getPoint: function ( t ) {

  		console.warn( "THREE.Curve: Warning, getPoint() not implemented!" );
  		return null;

  	},

  	// Get point at relative position in curve according to arc length
  	// - u [0 .. 1]

  	getPointAt: function ( u ) {

  		var t = this.getUtoTmapping( u );
  		return this.getPoint( t );

  	},

  	// Get sequence of points using getPoint( t )

  	getPoints: function ( divisions ) {

  		if ( ! divisions ) divisions = 5;

  		var points = [];

  		for ( var d = 0; d <= divisions; d ++ ) {

  			points.push( this.getPoint( d / divisions ) );

  		}

  		return points;

  	},

  	// Get sequence of points using getPointAt( u )

  	getSpacedPoints: function ( divisions ) {

  		if ( ! divisions ) divisions = 5;

  		var points = [];

  		for ( var d = 0; d <= divisions; d ++ ) {

  			points.push( this.getPointAt( d / divisions ) );

  		}

  		return points;

  	},

  	// Get total curve arc length

  	getLength: function () {

  		var lengths = this.getLengths();
  		return lengths[ lengths.length - 1 ];

  	},

  	// Get list of cumulative segment lengths

  	getLengths: function ( divisions ) {

  		if ( ! divisions ) divisions = ( this.__arcLengthDivisions ) ? ( this.__arcLengthDivisions ) : 200;

  		if ( this.cacheArcLengths
  			&& ( this.cacheArcLengths.length === divisions + 1 )
  			&& ! this.needsUpdate ) {

  			//console.log( "cached", this.cacheArcLengths );
  			return this.cacheArcLengths;

  		}

  		this.needsUpdate = false;

  		var cache = [];
  		var current, last = this.getPoint( 0 );
  		var p, sum = 0;

  		cache.push( 0 );

  		for ( p = 1; p <= divisions; p ++ ) {

  			current = this.getPoint ( p / divisions );
  			sum += current.distanceTo( last );
  			cache.push( sum );
  			last = current;

  		}

  		this.cacheArcLengths = cache;

  		return cache; // { sums: cache, sum:sum }; Sum is in the last element.

  	},

  	updateArcLengths: function() {

  		this.needsUpdate = true;
  		this.getLengths();

  	},

  	// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant

  	getUtoTmapping: function ( u, distance ) {

  		var arcLengths = this.getLengths();

  		var i = 0, il = arcLengths.length;

  		var targetArcLength; // The targeted u distance value to get

  		if ( distance ) {

  			targetArcLength = distance;

  		} else {

  			targetArcLength = u * arcLengths[ il - 1 ];

  		}

  		//var time = Date.now();

  		// binary search for the index with largest value smaller than target u distance

  		var low = 0, high = il - 1, comparison;

  		while ( low <= high ) {

  			i = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats

  			comparison = arcLengths[ i ] - targetArcLength;

  			if ( comparison < 0 ) {

  				low = i + 1;

  			} else if ( comparison > 0 ) {

  				high = i - 1;

  			} else {

  				high = i;
  				break;

  				// DONE

  			}

  		}

  		i = high;

  		//console.log('b' , i, low, high, Date.now()- time);

  		if ( arcLengths[ i ] === targetArcLength ) {

  			var t = i / ( il - 1 );
  			return t;

  		}

  		// we could get finer grain at lengths, or use simple interpolation between two points

  		var lengthBefore = arcLengths[ i ];
  		var lengthAfter = arcLengths[ i + 1 ];

  		var segmentLength = lengthAfter - lengthBefore;

  		// determine where we are between the 'before' and 'after' points

  		var segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;

  		// add that fractional amount to t

  		var t = ( i + segmentFraction ) / ( il - 1 );

  		return t;

  	},

  	// Returns a unit vector tangent at t
  	// In case any sub curve does not implement its tangent derivation,
  	// 2 points a small delta apart will be used to find its gradient
  	// which seems to give a reasonable approximation

  	getTangent: function( t ) {

  		var delta = 0.0001;
  		var t1 = t - delta;
  		var t2 = t + delta;

  		// Capping in case of danger

  		if ( t1 < 0 ) t1 = 0;
  		if ( t2 > 1 ) t2 = 1;

  		var pt1 = this.getPoint( t1 );
  		var pt2 = this.getPoint( t2 );

  		var vec = pt2.clone().sub( pt1 );
  		return vec.normalize();

  	},

  	getTangentAt: function ( u ) {

  		var t = this.getUtoTmapping( u );
  		return this.getTangent( t );

  	}

  };

  // TODO: Transformation for Curves?

  /**************************************************************
   *	3D Curves
   **************************************************************/

  // A Factory method for creating new curve subclasses

  Curve.create = function ( constructor, getPointFunc ) {

  	constructor.prototype = Object.create( Curve.prototype );
  	constructor.prototype.constructor = constructor;
  	constructor.prototype.getPoint = getPointFunc;

  	return constructor;

  };

  /**************************************************************
   *	Line
   **************************************************************/

  function LineCurve( v1, v2 ) {

  	this.v1 = v1;
  	this.v2 = v2;

  };

  LineCurve.prototype = Object.create( Curve.prototype );
  LineCurve.prototype.constructor = LineCurve;

  LineCurve.prototype.isLineCurve = true;

  LineCurve.prototype.getPoint = function ( t ) {

  	if ( t === 1 ) {

  		return this.v2.clone();

  	}

  	var point = this.v2.clone().sub( this.v1 );
  	point.multiplyScalar( t ).add( this.v1 );

  	return point;

  };

  // Line curve is linear, so we can overwrite default getPointAt

  LineCurve.prototype.getPointAt = function ( u ) {

  	return this.getPoint( u );

  };

  LineCurve.prototype.getTangent = function( t ) {

  	var tangent = this.v2.clone().sub( this.v1 );

  	return tangent.normalize();

  };

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   *
   **/

  /**************************************************************
   *	Curved Path - a curve path is simply a array of connected
   *  curves, but retains the api of a curve
   **************************************************************/

  function CurvePath() {

  	this.curves = [];

  	this.autoClose = false; // Automatically closes the path

  };

  CurvePath.prototype = Object.assign( Object.create( Curve.prototype ), {

  	constructor: CurvePath,

  	add: function ( curve ) {

  		this.curves.push( curve );

  	},

  	closePath: function () {

  		// Add a line curve if start and end of lines are not connected
  		var startPoint = this.curves[ 0 ].getPoint( 0 );
  		var endPoint = this.curves[ this.curves.length - 1 ].getPoint( 1 );

  		if ( ! startPoint.equals( endPoint ) ) {

  			this.curves.push( new LineCurve( endPoint, startPoint ) );

  		}

  	},

  	// To get accurate point with reference to
  	// entire path distance at time t,
  	// following has to be done:

  	// 1. Length of each sub path have to be known
  	// 2. Locate and identify type of curve
  	// 3. Get t for the curve
  	// 4. Return curve.getPointAt(t')

  	getPoint: function ( t ) {

  		var d = t * this.getLength();
  		var curveLengths = this.getCurveLengths();
  		var i = 0;

  		// To think about boundaries points.

  		while ( i < curveLengths.length ) {

  			if ( curveLengths[ i ] >= d ) {

  				var diff = curveLengths[ i ] - d;
  				var curve = this.curves[ i ];

  				var segmentLength = curve.getLength();
  				var u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;

  				return curve.getPointAt( u );

  			}

  			i ++;

  		}

  		return null;

  		// loop where sum != 0, sum > d , sum+1 <d

  	},

  	// We cannot use the default THREE.Curve getPoint() with getLength() because in
  	// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
  	// getPoint() depends on getLength

  	getLength: function () {

  		var lens = this.getCurveLengths();
  		return lens[ lens.length - 1 ];

  	},

  	// cacheLengths must be recalculated.
  	updateArcLengths: function () {

  		this.needsUpdate = true;
  		this.cacheLengths = null;
  		this.getLengths();

  	},

  	// Compute lengths and cache them
  	// We cannot overwrite getLengths() because UtoT mapping uses it.

  	getCurveLengths: function () {

  		// We use cache values if curves and cache array are same length

  		if ( this.cacheLengths && this.cacheLengths.length === this.curves.length ) {

  			return this.cacheLengths;

  		}

  		// Get length of sub-curve
  		// Push sums into cached array

  		var lengths = [], sums = 0;

  		for ( var i = 0, l = this.curves.length; i < l; i ++ ) {

  			sums += this.curves[ i ].getLength();
  			lengths.push( sums );

  		}

  		this.cacheLengths = lengths;

  		return lengths;

  	},

  	getSpacedPoints: function ( divisions ) {

  		if ( ! divisions ) divisions = 40;

  		var points = [];

  		for ( var i = 0; i <= divisions; i ++ ) {

  			points.push( this.getPoint( i / divisions ) );

  		}

  		if ( this.autoClose ) {

  			points.push( points[ 0 ] );

  		}

  		return points;

  	},

  	getPoints: function ( divisions ) {

  		divisions = divisions || 12;

  		var points = [], last;

  		for ( var i = 0, curves = this.curves; i < curves.length; i ++ ) {

  			var curve = curves[ i ];
  			var resolution = (curve && curve.isEllipseCurve) ? divisions * 2
  				: (curve && curve.isLineCurve) ? 1
  				: (curve && curve.isSplineCurve) ? divisions * curve.points.length
  				: divisions;

  			var pts = curve.getPoints( resolution );

  			for ( var j = 0; j < pts.length; j++ ) {

  				var point = pts[ j ];

  				if ( last && last.equals( point ) ) continue; // ensures no consecutive points are duplicates

  				points.push( point );
  				last = point;

  			}

  		}

  		if ( this.autoClose && points.length > 1 && !points[ points.length - 1 ].equals( points[ 0 ] ) ) {

  			points.push( points[ 0 ] );

  		}

  		return points;

  	},

  	/**************************************************************
  	 *	Create Geometries Helpers
  	 **************************************************************/

  	/// Generate geometry from path points (for Line or Points objects)

  	createPointsGeometry: function ( divisions ) {

  		var pts = this.getPoints( divisions );
  		return this.createGeometry( pts );

  	},

  	// Generate geometry from equidistant sampling along the path

  	createSpacedPointsGeometry: function ( divisions ) {

  		var pts = this.getSpacedPoints( divisions );
  		return this.createGeometry( pts );

  	},

  	createGeometry: function ( points ) {

  		var geometry = new Geometry();

  		for ( var i = 0, l = points.length; i < l; i ++ ) {

  			var point = points[ i ];
  			geometry.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );

  		}

  		return geometry;

  	}

  } );

  /**************************************************************
   *	Ellipse curve
   **************************************************************/

  function EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

  	this.aX = aX;
  	this.aY = aY;

  	this.xRadius = xRadius;
  	this.yRadius = yRadius;

  	this.aStartAngle = aStartAngle;
  	this.aEndAngle = aEndAngle;

  	this.aClockwise = aClockwise;

  	this.aRotation = aRotation || 0;

  };

  EllipseCurve.prototype = Object.create( Curve.prototype );
  EllipseCurve.prototype.constructor = EllipseCurve;

  EllipseCurve.prototype.isEllipseCurve = true;

  EllipseCurve.prototype.getPoint = function( t ) {

  	var twoPi = Math.PI * 2;
  	var deltaAngle = this.aEndAngle - this.aStartAngle;
  	var samePoints = Math.abs( deltaAngle ) < Number.EPSILON;

  	// ensures that deltaAngle is 0 .. 2 PI
  	while ( deltaAngle < 0 ) deltaAngle += twoPi;
  	while ( deltaAngle > twoPi ) deltaAngle -= twoPi;

  	if ( deltaAngle < Number.EPSILON ) {

  		if ( samePoints ) {

  			deltaAngle = 0;

  		} else {

  			deltaAngle = twoPi;

  		}

  	}

  	if ( this.aClockwise === true && ! samePoints ) {

  		if ( deltaAngle === twoPi ) {

  			deltaAngle = - twoPi;

  		} else {

  			deltaAngle = deltaAngle - twoPi;

  		}

  	}

  	var angle = this.aStartAngle + t * deltaAngle;
  	var x = this.aX + this.xRadius * Math.cos( angle );
  	var y = this.aY + this.yRadius * Math.sin( angle );

  	if ( this.aRotation !== 0 ) {

  		var cos = Math.cos( this.aRotation );
  		var sin = Math.sin( this.aRotation );

  		var tx = x - this.aX;
  		var ty = y - this.aY;

  		// Rotate the point about the center of the ellipse.
  		x = tx * cos - ty * sin + this.aX;
  		y = tx * sin + ty * cos + this.aY;

  	}

  	return new Vector2( x, y );

  };

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   */

  exports.CurveUtils = {

  	tangentQuadraticBezier: function ( t, p0, p1, p2 ) {

  		return 2 * ( 1 - t ) * ( p1 - p0 ) + 2 * t * ( p2 - p1 );

  	},

  	// Puay Bing, thanks for helping with this derivative!

  	tangentCubicBezier: function ( t, p0, p1, p2, p3 ) {

  		return - 3 * p0 * ( 1 - t ) * ( 1 - t )  +
  			3 * p1 * ( 1 - t ) * ( 1 - t ) - 6 * t * p1 * ( 1 - t ) +
  			6 * t *  p2 * ( 1 - t ) - 3 * t * t * p2 +
  			3 * t * t * p3;

  	},

  	tangentSpline: function ( t, p0, p1, p2, p3 ) {

  		// To check if my formulas are correct

  		var h00 = 6 * t * t - 6 * t; 	// derived from 2t^3 − 3t^2 + 1
  		var h10 = 3 * t * t - 4 * t + 1; // t^3 − 2t^2 + t
  		var h01 = - 6 * t * t + 6 * t; 	// − 2t3 + 3t2
  		var h11 = 3 * t * t - 2 * t;	// t3 − t2

  		return h00 + h10 + h01 + h11;

  	},

  	// Catmull-Rom

  	interpolate: function( p0, p1, p2, p3, t ) {

  		var v0 = ( p2 - p0 ) * 0.5;
  		var v1 = ( p3 - p1 ) * 0.5;
  		var t2 = t * t;
  		var t3 = t * t2;
  		return ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;

  	}

  };

  /**************************************************************
   *	Spline curve
   **************************************************************/

  function SplineCurve( points /* array of Vector2 */ ) {

  	this.points = ( points == undefined ) ? [] : points;

  };

  SplineCurve.prototype = Object.create( Curve.prototype );
  SplineCurve.prototype.constructor = SplineCurve;

  SplineCurve.prototype.isSplineCurve = true;

  SplineCurve.prototype.getPoint = function ( t ) {

  	var points = this.points;
  	var point = ( points.length - 1 ) * t;

  	var intPoint = Math.floor( point );
  	var weight = point - intPoint;

  	var point0 = points[ intPoint === 0 ? intPoint : intPoint - 1 ];
  	var point1 = points[ intPoint ];
  	var point2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];
  	var point3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];

  	var interpolate = exports.CurveUtils.interpolate;

  	return new Vector2(
  		interpolate( point0.x, point1.x, point2.x, point3.x, weight ),
  		interpolate( point0.y, point1.y, point2.y, point3.y, weight )
  	);

  };

  /**************************************************************
   *	Cubic Bezier curve
   **************************************************************/

  function CubicBezierCurve( v0, v1, v2, v3 ) {

  	this.v0 = v0;
  	this.v1 = v1;
  	this.v2 = v2;
  	this.v3 = v3;

  };

  CubicBezierCurve.prototype = Object.create( Curve.prototype );
  CubicBezierCurve.prototype.constructor = CubicBezierCurve;

  CubicBezierCurve.prototype.getPoint = function ( t ) {

  	var b3 = exports.ShapeUtils.b3;

  	return new Vector2(
  		b3( t, this.v0.x, this.v1.x, this.v2.x, this.v3.x ),
  		b3( t, this.v0.y, this.v1.y, this.v2.y, this.v3.y )
  	);

  };

  CubicBezierCurve.prototype.getTangent = function( t ) {

  	var tangentCubicBezier = exports.CurveUtils.tangentCubicBezier;

  	return new Vector2(
  		tangentCubicBezier( t, this.v0.x, this.v1.x, this.v2.x, this.v3.x ),
  		tangentCubicBezier( t, this.v0.y, this.v1.y, this.v2.y, this.v3.y )
  	).normalize();

  };

  /**************************************************************
   *	Quadratic Bezier curve
   **************************************************************/


  function QuadraticBezierCurve( v0, v1, v2 ) {

  	this.v0 = v0;
  	this.v1 = v1;
  	this.v2 = v2;

  };

  QuadraticBezierCurve.prototype = Object.create( Curve.prototype );
  QuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;


  QuadraticBezierCurve.prototype.getPoint = function ( t ) {

  	var b2 = exports.ShapeUtils.b2;

  	return new Vector2(
  		b2( t, this.v0.x, this.v1.x, this.v2.x ),
  		b2( t, this.v0.y, this.v1.y, this.v2.y )
  	);

  };


  QuadraticBezierCurve.prototype.getTangent = function( t ) {

  	var tangentQuadraticBezier = exports.CurveUtils.tangentQuadraticBezier;

  	return new Vector2(
  		tangentQuadraticBezier( t, this.v0.x, this.v1.x, this.v2.x ),
  		tangentQuadraticBezier( t, this.v0.y, this.v1.y, this.v2.y )
  	).normalize();

  };

  var PathPrototype = Object.assign( Object.create( CurvePath.prototype ), {

  	fromPoints: function ( vectors ) {

  		this.moveTo( vectors[ 0 ].x, vectors[ 0 ].y );

  		for ( var i = 1, l = vectors.length; i < l; i ++ ) {

  			this.lineTo( vectors[ i ].x, vectors[ i ].y );

  		}

  	},

  	moveTo: function ( x, y ) {

  		this.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?

  	},

  	lineTo: function ( x, y ) {

  		var curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );
  		this.curves.push( curve );

  		this.currentPoint.set( x, y );

  	},

  	quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {

  		var curve = new QuadraticBezierCurve(
  			this.currentPoint.clone(),
  			new Vector2( aCPx, aCPy ),
  			new Vector2( aX, aY )
  		);

  		this.curves.push( curve );

  		this.currentPoint.set( aX, aY );

  	},

  	bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {

  		var curve = new CubicBezierCurve(
  			this.currentPoint.clone(),
  			new Vector2( aCP1x, aCP1y ),
  			new Vector2( aCP2x, aCP2y ),
  			new Vector2( aX, aY )
  		);

  		this.curves.push( curve );

  		this.currentPoint.set( aX, aY );

  	},

  	splineThru: function ( pts /*Array of Vector*/ ) {

  		var npts = [ this.currentPoint.clone() ].concat( pts );

  		var curve = new SplineCurve( npts );
  		this.curves.push( curve );

  		this.currentPoint.copy( pts[ pts.length - 1 ] );

  	},

  	arc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

  		var x0 = this.currentPoint.x;
  		var y0 = this.currentPoint.y;

  		this.absarc( aX + x0, aY + y0, aRadius,
  			aStartAngle, aEndAngle, aClockwise );

  	},

  	absarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

  		this.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );

  	},

  	ellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

  		var x0 = this.currentPoint.x;
  		var y0 = this.currentPoint.y;

  		this.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );

  	},

  	absellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

  		var curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );

  		if ( this.curves.length > 0 ) {

  			// if a previous curve is present, attempt to join
  			var firstPoint = curve.getPoint( 0 );

  			if ( ! firstPoint.equals( this.currentPoint ) ) {

  				this.lineTo( firstPoint.x, firstPoint.y );

  			}

  		}

  		this.curves.push( curve );

  		var lastPoint = curve.getPoint( 1 );
  		this.currentPoint.copy( lastPoint );

  	}

  } )

  /**
   * @author WestLangley / https://github.com/WestLangley
   * @author zz85 / https://github.com/zz85
   * @author miningold / https://github.com/miningold
   * @author jonobr1 / https://github.com/jonobr1
   *
   * Modified from the TorusKnotGeometry by @oosmoxiecode
   *
   * Creates a tube which extrudes along a 3d spline
   *
   * Uses parallel transport frames as described in
   * http://www.cs.indiana.edu/pub/techreports/TR425.pdf
   */

  function TubeGeometry( path, segments, radius, radialSegments, closed, taper ) {

  	Geometry.call( this );

  	this.type = 'TubeGeometry';

  	this.parameters = {
  		path: path,
  		segments: segments,
  		radius: radius,
  		radialSegments: radialSegments,
  		closed: closed,
  		taper: taper
  	};

  	segments = segments || 64;
  	radius = radius || 1;
  	radialSegments = radialSegments || 8;
  	closed = closed || false;
  	taper = taper || TubeGeometry.NoTaper;

  	var grid = [];

  	var scope = this,

  		tangent,
  		normal,
  		binormal,

  		numpoints = segments + 1,

  		u, v, r,

  		cx, cy,
  		pos, pos2 = new Vector3(),
  		i, j,
  		ip, jp,
  		a, b, c, d,
  		uva, uvb, uvc, uvd;

  	var frames = new TubeGeometry.FrenetFrames( path, segments, closed ),
  		tangents = frames.tangents,
  		normals = frames.normals,
  		binormals = frames.binormals;

  	// proxy internals
  	this.tangents = tangents;
  	this.normals = normals;
  	this.binormals = binormals;

  	function vert( x, y, z ) {

  		return scope.vertices.push( new Vector3( x, y, z ) ) - 1;

  	}

  	// construct the grid

  	for ( i = 0; i < numpoints; i ++ ) {

  		grid[ i ] = [];

  		u = i / ( numpoints - 1 );

  		pos = path.getPointAt( u );

  		tangent = tangents[ i ];
  		normal = normals[ i ];
  		binormal = binormals[ i ];

  		r = radius * taper( u );

  		for ( j = 0; j < radialSegments; j ++ ) {

  			v = j / radialSegments * 2 * Math.PI;

  			cx = - r * Math.cos( v ); // TODO: Hack: Negating it so it faces outside.
  			cy = r * Math.sin( v );

  			pos2.copy( pos );
  			pos2.x += cx * normal.x + cy * binormal.x;
  			pos2.y += cx * normal.y + cy * binormal.y;
  			pos2.z += cx * normal.z + cy * binormal.z;

  			grid[ i ][ j ] = vert( pos2.x, pos2.y, pos2.z );

  		}

  	}


  	// construct the mesh

  	for ( i = 0; i < segments; i ++ ) {

  		for ( j = 0; j < radialSegments; j ++ ) {

  			ip = ( closed ) ? ( i + 1 ) % segments : i + 1;
  			jp = ( j + 1 ) % radialSegments;

  			a = grid[ i ][ j ];		// *** NOT NECESSARILY PLANAR ! ***
  			b = grid[ ip ][ j ];
  			c = grid[ ip ][ jp ];
  			d = grid[ i ][ jp ];

  			uva = new Vector2( i / segments, j / radialSegments );
  			uvb = new Vector2( ( i + 1 ) / segments, j / radialSegments );
  			uvc = new Vector2( ( i + 1 ) / segments, ( j + 1 ) / radialSegments );
  			uvd = new Vector2( i / segments, ( j + 1 ) / radialSegments );

  			this.faces.push( new Face3( a, b, d ) );
  			this.faceVertexUvs[ 0 ].push( [ uva, uvb, uvd ] );

  			this.faces.push( new Face3( b, c, d ) );
  			this.faceVertexUvs[ 0 ].push( [ uvb.clone(), uvc, uvd.clone() ] );

  		}

  	}

  	this.computeFaceNormals();
  	this.computeVertexNormals();

  };

  TubeGeometry.prototype = Object.create( Geometry.prototype );
  TubeGeometry.prototype.constructor = TubeGeometry;

  TubeGeometry.NoTaper = function ( u ) {

  	return 1;

  };

  TubeGeometry.SinusoidalTaper = function ( u ) {

  	return Math.sin( Math.PI * u );

  };

  // For computing of Frenet frames, exposing the tangents, normals and binormals the spline
  TubeGeometry.FrenetFrames = function ( path, segments, closed ) {

  	var	normal = new Vector3(),

  		tangents = [],
  		normals = [],
  		binormals = [],

  		vec = new Vector3(),
  		mat = new Matrix4(),

  		numpoints = segments + 1,
  		theta,
  		smallest,

  		tx, ty, tz,
  		i, u;


  	// expose internals
  	this.tangents = tangents;
  	this.normals = normals;
  	this.binormals = binormals;

  	// compute the tangent vectors for each segment on the path

  	for ( i = 0; i < numpoints; i ++ ) {

  		u = i / ( numpoints - 1 );

  		tangents[ i ] = path.getTangentAt( u );
  		tangents[ i ].normalize();

  	}

  	initialNormal3();

  	/*
  	function initialNormal1(lastBinormal) {
  		// fixed start binormal. Has dangers of 0 vectors
  		normals[ 0 ] = new THREE.Vector3();
  		binormals[ 0 ] = new THREE.Vector3();
  		if (lastBinormal===undefined) lastBinormal = new THREE.Vector3( 0, 0, 1 );
  		normals[ 0 ].crossVectors( lastBinormal, tangents[ 0 ] ).normalize();
  		binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] ).normalize();
  	}

  	function initialNormal2() {

  		// This uses the Frenet-Serret formula for deriving binormal
  		var t2 = path.getTangentAt( epsilon );

  		normals[ 0 ] = new THREE.Vector3().subVectors( t2, tangents[ 0 ] ).normalize();
  		binormals[ 0 ] = new THREE.Vector3().crossVectors( tangents[ 0 ], normals[ 0 ] );

  		normals[ 0 ].crossVectors( binormals[ 0 ], tangents[ 0 ] ).normalize(); // last binormal x tangent
  		binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] ).normalize();

  	}
  	*/

  	function initialNormal3() {

  		// select an initial normal vector perpendicular to the first tangent vector,
  		// and in the direction of the smallest tangent xyz component

  		normals[ 0 ] = new Vector3();
  		binormals[ 0 ] = new Vector3();
  		smallest = Number.MAX_VALUE;
  		tx = Math.abs( tangents[ 0 ].x );
  		ty = Math.abs( tangents[ 0 ].y );
  		tz = Math.abs( tangents[ 0 ].z );

  		if ( tx <= smallest ) {

  			smallest = tx;
  			normal.set( 1, 0, 0 );

  		}

  		if ( ty <= smallest ) {

  			smallest = ty;
  			normal.set( 0, 1, 0 );

  		}

  		if ( tz <= smallest ) {

  			normal.set( 0, 0, 1 );

  		}

  		vec.crossVectors( tangents[ 0 ], normal ).normalize();

  		normals[ 0 ].crossVectors( tangents[ 0 ], vec );
  		binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );

  	}


  	// compute the slowly-varying normal and binormal vectors for each segment on the path

  	for ( i = 1; i < numpoints; i ++ ) {

  		normals[ i ] = normals[ i - 1 ].clone();

  		binormals[ i ] = binormals[ i - 1 ].clone();

  		vec.crossVectors( tangents[ i - 1 ], tangents[ i ] );

  		if ( vec.length() > Number.EPSILON ) {

  			vec.normalize();

  			theta = Math.acos( exports.Math.clamp( tangents[ i - 1 ].dot( tangents[ i ] ), - 1, 1 ) ); // clamp for floating pt errors

  			normals[ i ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );

  		}

  		binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );

  	}


  	// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same

  	if ( closed ) {

  		theta = Math.acos( exports.Math.clamp( normals[ 0 ].dot( normals[ numpoints - 1 ] ), - 1, 1 ) );
  		theta /= ( numpoints - 1 );

  		if ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ numpoints - 1 ] ) ) > 0 ) {

  			theta = - theta;

  		}

  		for ( i = 1; i < numpoints; i ++ ) {

  			// twist a little...
  			normals[ i ].applyMatrix4( mat.makeRotationAxis( tangents[ i ], theta * i ) );
  			binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );

  		}

  	}

  };

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   *
   * Creates extruded geometry from a path shape.
   *
   * parameters = {
   *
   *  curveSegments: <int>, // number of points on the curves
   *  steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too
   *  amount: <int>, // Depth to extrude the shape
   *
   *  bevelEnabled: <bool>, // turn on bevel
   *  bevelThickness: <float>, // how deep into the original shape bevel goes
   *  bevelSize: <float>, // how far from shape outline is bevel
   *  bevelSegments: <int>, // number of bevel layers
   *
   *  extrudePath: <THREE.CurvePath> // 3d spline path to extrude shape along. (creates Frames if .frames aren't defined)
   *  frames: <THREE.TubeGeometry.FrenetFrames> // containing arrays of tangents, normals, binormals
   *
   *  uvGenerator: <Object> // object that provides UV generator functions
   *
   * }
   **/

  function ExtrudeGeometry( shapes, options ) {

  	if ( typeof( shapes ) === "undefined" ) {

  		shapes = [];
  		return;

  	}

  	Geometry.call( this );

  	this.type = 'ExtrudeGeometry';

  	shapes = Array.isArray( shapes ) ? shapes : [ shapes ];

  	this.addShapeList( shapes, options );

  	this.computeFaceNormals();

  	// can't really use automatic vertex normals
  	// as then front and back sides get smoothed too
  	// should do separate smoothing just for sides

  	//this.computeVertexNormals();

  	//console.log( "took", ( Date.now() - startTime ) );

  };

  ExtrudeGeometry.prototype = Object.create( Geometry.prototype );
  ExtrudeGeometry.prototype.constructor = ExtrudeGeometry;

  ExtrudeGeometry.prototype.addShapeList = function ( shapes, options ) {

  	var sl = shapes.length;

  	for ( var s = 0; s < sl; s ++ ) {

  		var shape = shapes[ s ];
  		this.addShape( shape, options );

  	}

  };

  ExtrudeGeometry.prototype.addShape = function ( shape, options ) {

  	var amount = options.amount !== undefined ? options.amount : 100;

  	var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6; // 10
  	var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2; // 8
  	var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;

  	var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true; // false

  	var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;

  	var steps = options.steps !== undefined ? options.steps : 1;

  	var extrudePath = options.extrudePath;
  	var extrudePts, extrudeByPath = false;

  	// Use default WorldUVGenerator if no UV generators are specified.
  	var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : ExtrudeGeometry.WorldUVGenerator;

  	var splineTube, binormal, normal, position2;
  	if ( extrudePath ) {

  		extrudePts = extrudePath.getSpacedPoints( steps );

  		extrudeByPath = true;
  		bevelEnabled = false; // bevels not supported for path extrusion

  		// SETUP TNB variables

  		// Reuse TNB from TubeGeomtry for now.
  		// TODO1 - have a .isClosed in spline?

  		splineTube = options.frames !== undefined ? options.frames : new TubeGeometry.FrenetFrames( extrudePath, steps, false );

  		// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);

  		binormal = new Vector3();
  		normal = new Vector3();
  		position2 = new Vector3();

  	}

  	// Safeguards if bevels are not enabled

  	if ( ! bevelEnabled ) {

  		bevelSegments = 0;
  		bevelThickness = 0;
  		bevelSize = 0;

  	}

  	// Variables initialization

  	var ahole, h, hl; // looping of holes
  	var scope = this;

  	var shapesOffset = this.vertices.length;

  	var shapePoints = shape.extractPoints( curveSegments );

  	var vertices = shapePoints.shape;
  	var holes = shapePoints.holes;

  	var reverse = ! exports.ShapeUtils.isClockWise( vertices );

  	if ( reverse ) {

  		vertices = vertices.reverse();

  		// Maybe we should also check if holes are in the opposite direction, just to be safe ...

  		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

  			ahole = holes[ h ];

  			if ( exports.ShapeUtils.isClockWise( ahole ) ) {

  				holes[ h ] = ahole.reverse();

  			}

  		}

  		reverse = false; // If vertices are in order now, we shouldn't need to worry about them again (hopefully)!

  	}


  	var faces = exports.ShapeUtils.triangulateShape( vertices, holes );

  	/* Vertices */

  	var contour = vertices; // vertices has all points but contour has only points of circumference

  	for ( h = 0, hl = holes.length; h < hl; h ++ ) {

  		ahole = holes[ h ];

  		vertices = vertices.concat( ahole );

  	}


  	function scalePt2( pt, vec, size ) {

  		if ( ! vec ) console.error( "THREE.ExtrudeGeometry: vec does not exist" );

  		return vec.clone().multiplyScalar( size ).add( pt );

  	}

  	var b, bs, t, z,
  		vert, vlen = vertices.length,
  		face, flen = faces.length;


  	// Find directions for point movement


  	function getBevelVec( inPt, inPrev, inNext ) {

  		// computes for inPt the corresponding point inPt' on a new contour
  		//   shifted by 1 unit (length of normalized vector) to the left
  		// if we walk along contour clockwise, this new contour is outside the old one
  		//
  		// inPt' is the intersection of the two lines parallel to the two
  		//  adjacent edges of inPt at a distance of 1 unit on the left side.

  		var v_trans_x, v_trans_y, shrink_by = 1;		// resulting translation vector for inPt

  		// good reading for geometry algorithms (here: line-line intersection)
  		// http://geomalgorithms.com/a05-_intersect-1.html

  		var v_prev_x = inPt.x - inPrev.x, v_prev_y = inPt.y - inPrev.y;
  		var v_next_x = inNext.x - inPt.x, v_next_y = inNext.y - inPt.y;

  		var v_prev_lensq = ( v_prev_x * v_prev_x + v_prev_y * v_prev_y );

  		// check for collinear edges
  		var collinear0 = ( v_prev_x * v_next_y - v_prev_y * v_next_x );

  		if ( Math.abs( collinear0 ) > Number.EPSILON ) {

  			// not collinear

  			// length of vectors for normalizing

  			var v_prev_len = Math.sqrt( v_prev_lensq );
  			var v_next_len = Math.sqrt( v_next_x * v_next_x + v_next_y * v_next_y );

  			// shift adjacent points by unit vectors to the left

  			var ptPrevShift_x = ( inPrev.x - v_prev_y / v_prev_len );
  			var ptPrevShift_y = ( inPrev.y + v_prev_x / v_prev_len );

  			var ptNextShift_x = ( inNext.x - v_next_y / v_next_len );
  			var ptNextShift_y = ( inNext.y + v_next_x / v_next_len );

  			// scaling factor for v_prev to intersection point

  			var sf = (  ( ptNextShift_x - ptPrevShift_x ) * v_next_y -
  						( ptNextShift_y - ptPrevShift_y ) * v_next_x    ) /
  					  ( v_prev_x * v_next_y - v_prev_y * v_next_x );

  			// vector from inPt to intersection point

  			v_trans_x = ( ptPrevShift_x + v_prev_x * sf - inPt.x );
  			v_trans_y = ( ptPrevShift_y + v_prev_y * sf - inPt.y );

  			// Don't normalize!, otherwise sharp corners become ugly
  			//  but prevent crazy spikes
  			var v_trans_lensq = ( v_trans_x * v_trans_x + v_trans_y * v_trans_y );
  			if ( v_trans_lensq <= 2 ) {

  				return	new Vector2( v_trans_x, v_trans_y );

  			} else {

  				shrink_by = Math.sqrt( v_trans_lensq / 2 );

  			}

  		} else {

  			// handle special case of collinear edges

  			var direction_eq = false;		// assumes: opposite
  			if ( v_prev_x > Number.EPSILON ) {

  				if ( v_next_x > Number.EPSILON ) {

  					direction_eq = true;

  				}

  			} else {

  				if ( v_prev_x < - Number.EPSILON ) {

  					if ( v_next_x < - Number.EPSILON ) {

  						direction_eq = true;

  					}

  				} else {

  					if ( Math.sign( v_prev_y ) === Math.sign( v_next_y ) ) {

  						direction_eq = true;

  					}

  				}

  			}

  			if ( direction_eq ) {

  				// console.log("Warning: lines are a straight sequence");
  				v_trans_x = - v_prev_y;
  				v_trans_y =  v_prev_x;
  				shrink_by = Math.sqrt( v_prev_lensq );

  			} else {

  				// console.log("Warning: lines are a straight spike");
  				v_trans_x = v_prev_x;
  				v_trans_y = v_prev_y;
  				shrink_by = Math.sqrt( v_prev_lensq / 2 );

  			}

  		}

  		return	new Vector2( v_trans_x / shrink_by, v_trans_y / shrink_by );

  	}


  	var contourMovements = [];

  	for ( var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

  		if ( j === il ) j = 0;
  		if ( k === il ) k = 0;

  		//  (j)---(i)---(k)
  		// console.log('i,j,k', i, j , k)

  		contourMovements[ i ] = getBevelVec( contour[ i ], contour[ j ], contour[ k ] );

  	}

  	var holesMovements = [], oneHoleMovements, verticesMovements = contourMovements.concat();

  	for ( h = 0, hl = holes.length; h < hl; h ++ ) {

  		ahole = holes[ h ];

  		oneHoleMovements = [];

  		for ( i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

  			if ( j === il ) j = 0;
  			if ( k === il ) k = 0;

  			//  (j)---(i)---(k)
  			oneHoleMovements[ i ] = getBevelVec( ahole[ i ], ahole[ j ], ahole[ k ] );

  		}

  		holesMovements.push( oneHoleMovements );
  		verticesMovements = verticesMovements.concat( oneHoleMovements );

  	}


  	// Loop bevelSegments, 1 for the front, 1 for the back

  	for ( b = 0; b < bevelSegments; b ++ ) {

  		//for ( b = bevelSegments; b > 0; b -- ) {

  		t = b / bevelSegments;
  		z = bevelThickness * Math.cos( t * Math.PI / 2 );
  		bs = bevelSize * Math.sin( t * Math.PI / 2 );

  		// contract shape

  		for ( i = 0, il = contour.length; i < il; i ++ ) {

  			vert = scalePt2( contour[ i ], contourMovements[ i ], bs );

  			v( vert.x, vert.y,  - z );

  		}

  		// expand holes

  		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

  			ahole = holes[ h ];
  			oneHoleMovements = holesMovements[ h ];

  			for ( i = 0, il = ahole.length; i < il; i ++ ) {

  				vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );

  				v( vert.x, vert.y,  - z );

  			}

  		}

  	}

  	bs = bevelSize;

  	// Back facing vertices

  	for ( i = 0; i < vlen; i ++ ) {

  		vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];

  		if ( ! extrudeByPath ) {

  			v( vert.x, vert.y, 0 );

  		} else {

  			// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );

  			normal.copy( splineTube.normals[ 0 ] ).multiplyScalar( vert.x );
  			binormal.copy( splineTube.binormals[ 0 ] ).multiplyScalar( vert.y );

  			position2.copy( extrudePts[ 0 ] ).add( normal ).add( binormal );

  			v( position2.x, position2.y, position2.z );

  		}

  	}

  	// Add stepped vertices...
  	// Including front facing vertices

  	var s;

  	for ( s = 1; s <= steps; s ++ ) {

  		for ( i = 0; i < vlen; i ++ ) {

  			vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];

  			if ( ! extrudeByPath ) {

  				v( vert.x, vert.y, amount / steps * s );

  			} else {

  				// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );

  				normal.copy( splineTube.normals[ s ] ).multiplyScalar( vert.x );
  				binormal.copy( splineTube.binormals[ s ] ).multiplyScalar( vert.y );

  				position2.copy( extrudePts[ s ] ).add( normal ).add( binormal );

  				v( position2.x, position2.y, position2.z );

  			}

  		}

  	}


  	// Add bevel segments planes

  	//for ( b = 1; b <= bevelSegments; b ++ ) {
  	for ( b = bevelSegments - 1; b >= 0; b -- ) {

  		t = b / bevelSegments;
  		z = bevelThickness * Math.cos ( t * Math.PI / 2 );
  		bs = bevelSize * Math.sin( t * Math.PI / 2 );

  		// contract shape

  		for ( i = 0, il = contour.length; i < il; i ++ ) {

  			vert = scalePt2( contour[ i ], contourMovements[ i ], bs );
  			v( vert.x, vert.y,  amount + z );

  		}

  		// expand holes

  		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

  			ahole = holes[ h ];
  			oneHoleMovements = holesMovements[ h ];

  			for ( i = 0, il = ahole.length; i < il; i ++ ) {

  				vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );

  				if ( ! extrudeByPath ) {

  					v( vert.x, vert.y,  amount + z );

  				} else {

  					v( vert.x, vert.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z );

  				}

  			}

  		}

  	}

  	/* Faces */

  	// Top and bottom faces

  	buildLidFaces();

  	// Sides faces

  	buildSideFaces();


  	/////  Internal functions

  	function buildLidFaces() {

  		if ( bevelEnabled ) {

  			var layer = 0; // steps + 1
  			var offset = vlen * layer;

  			// Bottom faces

  			for ( i = 0; i < flen; i ++ ) {

  				face = faces[ i ];
  				f3( face[ 2 ] + offset, face[ 1 ] + offset, face[ 0 ] + offset );

  			}

  			layer = steps + bevelSegments * 2;
  			offset = vlen * layer;

  			// Top faces

  			for ( i = 0; i < flen; i ++ ) {

  				face = faces[ i ];
  				f3( face[ 0 ] + offset, face[ 1 ] + offset, face[ 2 ] + offset );

  			}

  		} else {

  			// Bottom faces

  			for ( i = 0; i < flen; i ++ ) {

  				face = faces[ i ];
  				f3( face[ 2 ], face[ 1 ], face[ 0 ] );

  			}

  			// Top faces

  			for ( i = 0; i < flen; i ++ ) {

  				face = faces[ i ];
  				f3( face[ 0 ] + vlen * steps, face[ 1 ] + vlen * steps, face[ 2 ] + vlen * steps );

  			}

  		}

  	}

  	// Create faces for the z-sides of the shape

  	function buildSideFaces() {

  		var layeroffset = 0;
  		sidewalls( contour, layeroffset );
  		layeroffset += contour.length;

  		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

  			ahole = holes[ h ];
  			sidewalls( ahole, layeroffset );

  			//, true
  			layeroffset += ahole.length;

  		}

  	}

  	function sidewalls( contour, layeroffset ) {

  		var j, k;
  		i = contour.length;

  		while ( -- i >= 0 ) {

  			j = i;
  			k = i - 1;
  			if ( k < 0 ) k = contour.length - 1;

  			//console.log('b', i,j, i-1, k,vertices.length);

  			var s = 0, sl = steps  + bevelSegments * 2;

  			for ( s = 0; s < sl; s ++ ) {

  				var slen1 = vlen * s;
  				var slen2 = vlen * ( s + 1 );

  				var a = layeroffset + j + slen1,
  					b = layeroffset + k + slen1,
  					c = layeroffset + k + slen2,
  					d = layeroffset + j + slen2;

  				f4( a, b, c, d, contour, s, sl, j, k );

  			}

  		}

  	}


  	function v( x, y, z ) {

  		scope.vertices.push( new Vector3( x, y, z ) );

  	}

  	function f3( a, b, c ) {

  		a += shapesOffset;
  		b += shapesOffset;
  		c += shapesOffset;

  		scope.faces.push( new Face3( a, b, c, null, null, 0 ) );

  		var uvs = uvgen.generateTopUV( scope, a, b, c );

  		scope.faceVertexUvs[ 0 ].push( uvs );

  	}

  	function f4( a, b, c, d, wallContour, stepIndex, stepsLength, contourIndex1, contourIndex2 ) {

  		a += shapesOffset;
  		b += shapesOffset;
  		c += shapesOffset;
  		d += shapesOffset;

  		scope.faces.push( new Face3( a, b, d, null, null, 1 ) );
  		scope.faces.push( new Face3( b, c, d, null, null, 1 ) );

  		var uvs = uvgen.generateSideWallUV( scope, a, b, c, d );

  		scope.faceVertexUvs[ 0 ].push( [ uvs[ 0 ], uvs[ 1 ], uvs[ 3 ] ] );
  		scope.faceVertexUvs[ 0 ].push( [ uvs[ 1 ], uvs[ 2 ], uvs[ 3 ] ] );

  	}

  };

  ExtrudeGeometry.WorldUVGenerator = {

  	generateTopUV: function ( geometry, indexA, indexB, indexC ) {

  		var vertices = geometry.vertices;

  		var a = vertices[ indexA ];
  		var b = vertices[ indexB ];
  		var c = vertices[ indexC ];

  		return [
  			new Vector2( a.x, a.y ),
  			new Vector2( b.x, b.y ),
  			new Vector2( c.x, c.y )
  		];

  	},

  	generateSideWallUV: function ( geometry, indexA, indexB, indexC, indexD ) {

  		var vertices = geometry.vertices;

  		var a = vertices[ indexA ];
  		var b = vertices[ indexB ];
  		var c = vertices[ indexC ];
  		var d = vertices[ indexD ];

  		if ( Math.abs( a.y - b.y ) < 0.01 ) {

  			return [
  				new Vector2( a.x, 1 - a.z ),
  				new Vector2( b.x, 1 - b.z ),
  				new Vector2( c.x, 1 - c.z ),
  				new Vector2( d.x, 1 - d.z )
  			];

  		} else {

  			return [
  				new Vector2( a.y, 1 - a.z ),
  				new Vector2( b.y, 1 - b.z ),
  				new Vector2( c.y, 1 - c.z ),
  				new Vector2( d.y, 1 - d.z )
  			];

  		}

  	}
  };

  /**
   * @author jonobr1 / http://jonobr1.com
   *
   * Creates a one-sided polygonal geometry from a path shape. Similar to
   * ExtrudeGeometry.
   *
   * parameters = {
   *
   *	curveSegments: <int>, // number of points on the curves. NOT USED AT THE MOMENT.
   *
   *	material: <int> // material index for front and back faces
   *	uvGenerator: <Object> // object that provides UV generator functions
   *
   * }
   **/

  function ShapeGeometry( shapes, options ) {

  	Geometry.call( this );

  	this.type = 'ShapeGeometry';

  	if ( Array.isArray( shapes ) === false ) shapes = [ shapes ];

  	this.addShapeList( shapes, options );

  	this.computeFaceNormals();

  };

  ShapeGeometry.prototype = Object.create( Geometry.prototype );
  ShapeGeometry.prototype.constructor = ShapeGeometry;

  /**
   * Add an array of shapes to THREE.ShapeGeometry.
   */
  ShapeGeometry.prototype.addShapeList = function ( shapes, options ) {

  	for ( var i = 0, l = shapes.length; i < l; i ++ ) {

  		this.addShape( shapes[ i ], options );

  	}

  	return this;

  };

  /**
   * Adds a shape to THREE.ShapeGeometry, based on THREE.ExtrudeGeometry.
   */
  ShapeGeometry.prototype.addShape = function ( shape, options ) {

  	if ( options === undefined ) options = {};
  	var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;

  	var material = options.material;
  	var uvgen = options.UVGenerator === undefined ? ExtrudeGeometry.WorldUVGenerator : options.UVGenerator;

  	//

  	var i, l, hole;

  	var shapesOffset = this.vertices.length;
  	var shapePoints = shape.extractPoints( curveSegments );

  	var vertices = shapePoints.shape;
  	var holes = shapePoints.holes;

  	var reverse = ! exports.ShapeUtils.isClockWise( vertices );

  	if ( reverse ) {

  		vertices = vertices.reverse();

  		// Maybe we should also check if holes are in the opposite direction, just to be safe...

  		for ( i = 0, l = holes.length; i < l; i ++ ) {

  			hole = holes[ i ];

  			if ( exports.ShapeUtils.isClockWise( hole ) ) {

  				holes[ i ] = hole.reverse();

  			}

  		}

  		reverse = false;

  	}

  	var faces = exports.ShapeUtils.triangulateShape( vertices, holes );

  	// Vertices

  	for ( i = 0, l = holes.length; i < l; i ++ ) {

  		hole = holes[ i ];
  		vertices = vertices.concat( hole );

  	}

  	//

  	var vert, vlen = vertices.length;
  	var face, flen = faces.length;

  	for ( i = 0; i < vlen; i ++ ) {

  		vert = vertices[ i ];

  		this.vertices.push( new Vector3( vert.x, vert.y, 0 ) );

  	}

  	for ( i = 0; i < flen; i ++ ) {

  		face = faces[ i ];

  		var a = face[ 0 ] + shapesOffset;
  		var b = face[ 1 ] + shapesOffset;
  		var c = face[ 2 ] + shapesOffset;

  		this.faces.push( new Face3( a, b, c, null, null, material ) );
  		this.faceVertexUvs[ 0 ].push( uvgen.generateTopUV( this, a, b, c ) );

  	}

  };

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * Defines a 2d shape plane using paths.
   **/

  // STEP 1 Create a path.
  // STEP 2 Turn path into shape.
  // STEP 3 ExtrudeGeometry takes in Shape/Shapes
  // STEP 3a - Extract points from each shape, turn to vertices
  // STEP 3b - Triangulate each shape, add faces.

  function Shape() {

  	Path.apply( this, arguments );

  	this.holes = [];

  };

  Shape.prototype = Object.assign( Object.create( PathPrototype ), {

  	constructor: Shape,

  	// Convenience method to return ExtrudeGeometry

  	extrude: function ( options ) {

  		return new ExtrudeGeometry( this, options );

  	},

  	// Convenience method to return ShapeGeometry

  	makeGeometry: function ( options ) {

  		return new ShapeGeometry( this, options );

  	},

  	getPointsHoles: function ( divisions ) {

  		var holesPts = [];

  		for ( var i = 0, l = this.holes.length; i < l; i ++ ) {

  			holesPts[ i ] = this.holes[ i ].getPoints( divisions );

  		}

  		return holesPts;

  	},

  	// Get points of shape and holes (keypoints based on segments parameter)

  	extractAllPoints: function ( divisions ) {

  		return {

  			shape: this.getPoints( divisions ),
  			holes: this.getPointsHoles( divisions )

  		};

  	},

  	extractPoints: function ( divisions ) {

  		return this.extractAllPoints( divisions );

  	}

  } );

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * Creates free form 2d path using series of points, lines or curves.
   *
   **/

  function Path( points ) {

  	CurvePath.call( this );
  	this.currentPoint = new Vector2();

  	if ( points ) {

  		this.fromPoints( points );

  	}

  };

  Path.prototype = PathPrototype;
  PathPrototype.constructor = Path;


  // minimal class for proxing functions to Path. Replaces old "extractSubpaths()"
  function ShapePath() {
  	this.subPaths = [];
  	this.currentPath = null;
  }

  ShapePath.prototype = {
  	moveTo: function ( x, y ) {
  		this.currentPath = new Path();
  		this.subPaths.push(this.currentPath);
  		this.currentPath.moveTo( x, y );
  	},
  	lineTo: function ( x, y ) {
  		this.currentPath.lineTo( x, y );
  	},
  	quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {
  		this.currentPath.quadraticCurveTo( aCPx, aCPy, aX, aY );
  	},
  	bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {
  		this.currentPath.bezierCurveTo( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY );
  	},
  	splineThru: function ( pts ) {
  		this.currentPath.splineThru( pts );
  	},

  	toShapes: function ( isCCW, noHoles ) {

  		function toShapesNoHoles( inSubpaths ) {

  			var shapes = [];

  			for ( var i = 0, l = inSubpaths.length; i < l; i ++ ) {

  				var tmpPath = inSubpaths[ i ];

  				var tmpShape = new Shape();
  				tmpShape.curves = tmpPath.curves;

  				shapes.push( tmpShape );

  			}

  			return shapes;

  		}

  		function isPointInsidePolygon( inPt, inPolygon ) {

  			var polyLen = inPolygon.length;

  			// inPt on polygon contour => immediate success    or
  			// toggling of inside/outside at every single! intersection point of an edge
  			//  with the horizontal line through inPt, left of inPt
  			//  not counting lowerY endpoints of edges and whole edges on that line
  			var inside = false;
  			for ( var p = polyLen - 1, q = 0; q < polyLen; p = q ++ ) {

  				var edgeLowPt  = inPolygon[ p ];
  				var edgeHighPt = inPolygon[ q ];

  				var edgeDx = edgeHighPt.x - edgeLowPt.x;
  				var edgeDy = edgeHighPt.y - edgeLowPt.y;

  				if ( Math.abs( edgeDy ) > Number.EPSILON ) {

  					// not parallel
  					if ( edgeDy < 0 ) {

  						edgeLowPt  = inPolygon[ q ]; edgeDx = - edgeDx;
  						edgeHighPt = inPolygon[ p ]; edgeDy = - edgeDy;

  					}
  					if ( ( inPt.y < edgeLowPt.y ) || ( inPt.y > edgeHighPt.y ) ) 		continue;

  					if ( inPt.y === edgeLowPt.y ) {

  						if ( inPt.x === edgeLowPt.x )		return	true;		// inPt is on contour ?
  						// continue;				// no intersection or edgeLowPt => doesn't count !!!

  					} else {

  						var perpEdge = edgeDy * ( inPt.x - edgeLowPt.x ) - edgeDx * ( inPt.y - edgeLowPt.y );
  						if ( perpEdge === 0 )				return	true;		// inPt is on contour ?
  						if ( perpEdge < 0 ) 				continue;
  						inside = ! inside;		// true intersection left of inPt

  					}

  				} else {

  					// parallel or collinear
  					if ( inPt.y !== edgeLowPt.y ) 		continue;			// parallel
  					// edge lies on the same horizontal line as inPt
  					if ( ( ( edgeHighPt.x <= inPt.x ) && ( inPt.x <= edgeLowPt.x ) ) ||
  						 ( ( edgeLowPt.x <= inPt.x ) && ( inPt.x <= edgeHighPt.x ) ) )		return	true;	// inPt: Point on contour !
  					// continue;

  				}

  			}

  			return	inside;

  		}

  		var isClockWise = exports.ShapeUtils.isClockWise;

  		var subPaths = this.subPaths;
  		if ( subPaths.length === 0 ) return [];

  		if ( noHoles === true )	return	toShapesNoHoles( subPaths );


  		var solid, tmpPath, tmpShape, shapes = [];

  		if ( subPaths.length === 1 ) {

  			tmpPath = subPaths[ 0 ];
  			tmpShape = new Shape();
  			tmpShape.curves = tmpPath.curves;
  			shapes.push( tmpShape );
  			return shapes;

  		}

  		var holesFirst = ! isClockWise( subPaths[ 0 ].getPoints() );
  		holesFirst = isCCW ? ! holesFirst : holesFirst;

  		// console.log("Holes first", holesFirst);

  		var betterShapeHoles = [];
  		var newShapes = [];
  		var newShapeHoles = [];
  		var mainIdx = 0;
  		var tmpPoints;

  		newShapes[ mainIdx ] = undefined;
  		newShapeHoles[ mainIdx ] = [];

  		for ( var i = 0, l = subPaths.length; i < l; i ++ ) {

  			tmpPath = subPaths[ i ];
  			tmpPoints = tmpPath.getPoints();
  			solid = isClockWise( tmpPoints );
  			solid = isCCW ? ! solid : solid;

  			if ( solid ) {

  				if ( ( ! holesFirst ) && ( newShapes[ mainIdx ] ) )	mainIdx ++;

  				newShapes[ mainIdx ] = { s: new Shape(), p: tmpPoints };
  				newShapes[ mainIdx ].s.curves = tmpPath.curves;

  				if ( holesFirst )	mainIdx ++;
  				newShapeHoles[ mainIdx ] = [];

  				//console.log('cw', i);

  			} else {

  				newShapeHoles[ mainIdx ].push( { h: tmpPath, p: tmpPoints[ 0 ] } );

  				//console.log('ccw', i);

  			}

  		}

  		// only Holes? -> probably all Shapes with wrong orientation
  		if ( ! newShapes[ 0 ] )	return	toShapesNoHoles( subPaths );


  		if ( newShapes.length > 1 ) {

  			var ambiguous = false;
  			var toChange = [];

  			for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {

  				betterShapeHoles[ sIdx ] = [];

  			}

  			for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {

  				var sho = newShapeHoles[ sIdx ];

  				for ( var hIdx = 0; hIdx < sho.length; hIdx ++ ) {

  					var ho = sho[ hIdx ];
  					var hole_unassigned = true;

  					for ( var s2Idx = 0; s2Idx < newShapes.length; s2Idx ++ ) {

  						if ( isPointInsidePolygon( ho.p, newShapes[ s2Idx ].p ) ) {

  							if ( sIdx !== s2Idx )	toChange.push( { froms: sIdx, tos: s2Idx, hole: hIdx } );
  							if ( hole_unassigned ) {

  								hole_unassigned = false;
  								betterShapeHoles[ s2Idx ].push( ho );

  							} else {

  								ambiguous = true;

  							}

  						}

  					}
  					if ( hole_unassigned ) {

  						betterShapeHoles[ sIdx ].push( ho );

  					}

  				}

  			}
  			// console.log("ambiguous: ", ambiguous);
  			if ( toChange.length > 0 ) {

  				// console.log("to change: ", toChange);
  				if ( ! ambiguous )	newShapeHoles = betterShapeHoles;

  			}

  		}

  		var tmpHoles;

  		for ( var i = 0, il = newShapes.length; i < il; i ++ ) {

  			tmpShape = newShapes[ i ].s;
  			shapes.push( tmpShape );
  			tmpHoles = newShapeHoles[ i ];

  			for ( var j = 0, jl = tmpHoles.length; j < jl; j ++ ) {

  				tmpShape.holes.push( tmpHoles[ j ].h );

  			}

  		}

  		//console.log("shape", shapes);

  		return shapes;

  	}
  }

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * @author mrdoob / http://mrdoob.com/
   */

  function Font( data ) {

  	this.data = data;

  };

  Object.assign( Font.prototype, {

  	isFont: true,

  	generateShapes: function ( text, size, divisions ) {

  		function createPaths( text ) {

  			var chars = String( text ).split( '' );
  			var scale = size / data.resolution;
  			var offset = 0;

  			var paths = [];

  			for ( var i = 0; i < chars.length; i ++ ) {

  				var ret = createPath( chars[ i ], scale, offset );
  				offset += ret.offset;

  				paths.push( ret.path );

  			}

  			return paths;

  		}

  		function createPath( c, scale, offset ) {

  			var glyph = data.glyphs[ c ] || data.glyphs[ '?' ];

  			if ( ! glyph ) return;

  			var path = new ShapePath();

  			var pts = [], b2 = exports.ShapeUtils.b2, b3 = exports.ShapeUtils.b3;
  			var x, y, cpx, cpy, cpx0, cpy0, cpx1, cpy1, cpx2, cpy2, laste;

  			if ( glyph.o ) {

  				var outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );

  				for ( var i = 0, l = outline.length; i < l; ) {

  					var action = outline[ i ++ ];

  					switch ( action ) {

  						case 'm': // moveTo

  							x = outline[ i ++ ] * scale + offset;
  							y = outline[ i ++ ] * scale;

  							path.moveTo( x, y );

  							break;

  						case 'l': // lineTo

  							x = outline[ i ++ ] * scale + offset;
  							y = outline[ i ++ ] * scale;

  							path.lineTo( x, y );

  							break;

  						case 'q': // quadraticCurveTo

  							cpx  = outline[ i ++ ] * scale + offset;
  							cpy  = outline[ i ++ ] * scale;
  							cpx1 = outline[ i ++ ] * scale + offset;
  							cpy1 = outline[ i ++ ] * scale;

  							path.quadraticCurveTo( cpx1, cpy1, cpx, cpy );

  							laste = pts[ pts.length - 1 ];

  							if ( laste ) {

  								cpx0 = laste.x;
  								cpy0 = laste.y;

  								for ( var i2 = 1; i2 <= divisions; i2 ++ ) {

  									var t = i2 / divisions;
  									b2( t, cpx0, cpx1, cpx );
  									b2( t, cpy0, cpy1, cpy );

  								}

  							}

  							break;

  						case 'b': // bezierCurveTo

  							cpx  = outline[ i ++ ] * scale + offset;
  							cpy  = outline[ i ++ ] * scale;
  							cpx1 = outline[ i ++ ] * scale + offset;
  							cpy1 = outline[ i ++ ] * scale;
  							cpx2 = outline[ i ++ ] * scale + offset;
  							cpy2 = outline[ i ++ ] * scale;

  							path.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );

  							laste = pts[ pts.length - 1 ];

  							if ( laste ) {

  								cpx0 = laste.x;
  								cpy0 = laste.y;

  								for ( var i2 = 1; i2 <= divisions; i2 ++ ) {

  									var t = i2 / divisions;
  									b3( t, cpx0, cpx1, cpx2, cpx );
  									b3( t, cpy0, cpy1, cpy2, cpy );

  								}

  							}

  							break;

  					}

  				}

  			}

  			return { offset: glyph.ha * scale, path: path };

  		}

  		//

  		if ( size === undefined ) size = 100;
  		if ( divisions === undefined ) divisions = 4;

  		var data = this.data;

  		var paths = createPaths( text );
  		var shapes = [];

  		for ( var p = 0, pl = paths.length; p < pl; p ++ ) {

  			Array.prototype.push.apply( shapes, paths[ p ].toShapes() );

  		}

  		return shapes;

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function FontLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( FontLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var scope = this;

  		var loader = new XHRLoader( this.manager );
  		loader.load( url, function ( text ) {

  			var json;

  			try {

  				json = JSON.parse( text );

  			} catch ( e ) {

  				console.warn( 'THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.' );
  				json = JSON.parse( text.substring( 65, text.length - 2 ) );

  			}

  			var font = scope.parse( json );

  			if ( onLoad ) onLoad( font );

  		}, onProgress, onError );

  	},

  	parse: function ( json ) {

  		return new Font( json );

  	}

  } );

  var context;

  function getAudioContext() {

  	if ( context === undefined ) {

  		context = new ( window.AudioContext || window.webkitAudioContext )();

  	}

  	return context;

  }

  /**
   * @author Reece Aaron Lecrivain / http://reecenotes.com/
   */

  function AudioLoader( manager ) {

  	this.manager = ( manager !== undefined ) ? manager : exports.DefaultLoadingManager;

  };

  Object.assign( AudioLoader.prototype, {

  	load: function ( url, onLoad, onProgress, onError ) {

  		var loader = new XHRLoader( this.manager );
  		loader.setResponseType( 'arraybuffer' );
  		loader.load( url, function ( buffer ) {

  			var context = getAudioContext();

  			context.decodeAudioData( buffer, function ( audioBuffer ) {

  				onLoad( audioBuffer );

  			} );

  		}, onProgress, onError );

  	}

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function StereoCamera() {

  	this.type = 'StereoCamera';

  	this.aspect = 1;

  	this.cameraL = new PerspectiveCamera();
  	this.cameraL.layers.enable( 1 );
  	this.cameraL.matrixAutoUpdate = false;

  	this.cameraR = new PerspectiveCamera();
  	this.cameraR.layers.enable( 2 );
  	this.cameraR.matrixAutoUpdate = false;

  };

  Object.assign( StereoCamera.prototype, {

  	update: ( function () {

  		var focus, fov, aspect, near, far;

  		var eyeRight = new Matrix4();
  		var eyeLeft = new Matrix4();

  		return function update( camera ) {

  			var needsUpdate = focus !== camera.focus || fov !== camera.fov ||
  												aspect !== camera.aspect * this.aspect || near !== camera.near ||
  												far !== camera.far;

  			if ( needsUpdate ) {

  				focus = camera.focus;
  				fov = camera.fov;
  				aspect = camera.aspect * this.aspect;
  				near = camera.near;
  				far = camera.far;

  				// Off-axis stereoscopic effect based on
  				// http://paulbourke.net/stereographics/stereorender/

  				var projectionMatrix = camera.projectionMatrix.clone();
  				var eyeSep = 0.064 / 2;
  				var eyeSepOnProjection = eyeSep * near / focus;
  				var ymax = near * Math.tan( exports.Math.DEG2RAD * fov * 0.5 );
  				var xmin, xmax;

  				// translate xOffset

  				eyeLeft.elements[ 12 ] = - eyeSep;
  				eyeRight.elements[ 12 ] = eyeSep;

  				// for left eye

  				xmin = - ymax * aspect + eyeSepOnProjection;
  				xmax = ymax * aspect + eyeSepOnProjection;

  				projectionMatrix.elements[ 0 ] = 2 * near / ( xmax - xmin );
  				projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );

  				this.cameraL.projectionMatrix.copy( projectionMatrix );

  				// for right eye

  				xmin = - ymax * aspect - eyeSepOnProjection;
  				xmax = ymax * aspect - eyeSepOnProjection;

  				projectionMatrix.elements[ 0 ] = 2 * near / ( xmax - xmin );
  				projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );

  				this.cameraR.projectionMatrix.copy( projectionMatrix );

  			}

  			this.cameraL.matrixWorld.copy( camera.matrixWorld ).multiply( eyeLeft );
  			this.cameraR.matrixWorld.copy( camera.matrixWorld ).multiply( eyeRight );

  		};

  	} )()

  } );

  /**
   * Camera for rendering cube maps
   *	- renders scene into axis-aligned cube
   *
   * @author alteredq / http://alteredqualia.com/
   */

  function CubeCamera( near, far, cubeResolution ) {

  	Object3D.call( this );

  	this.type = 'CubeCamera';

  	var fov = 90, aspect = 1;

  	var cameraPX = new PerspectiveCamera( fov, aspect, near, far );
  	cameraPX.up.set( 0, - 1, 0 );
  	cameraPX.lookAt( new Vector3( 1, 0, 0 ) );
  	this.add( cameraPX );

  	var cameraNX = new PerspectiveCamera( fov, aspect, near, far );
  	cameraNX.up.set( 0, - 1, 0 );
  	cameraNX.lookAt( new Vector3( - 1, 0, 0 ) );
  	this.add( cameraNX );

  	var cameraPY = new PerspectiveCamera( fov, aspect, near, far );
  	cameraPY.up.set( 0, 0, 1 );
  	cameraPY.lookAt( new Vector3( 0, 1, 0 ) );
  	this.add( cameraPY );

  	var cameraNY = new PerspectiveCamera( fov, aspect, near, far );
  	cameraNY.up.set( 0, 0, - 1 );
  	cameraNY.lookAt( new Vector3( 0, - 1, 0 ) );
  	this.add( cameraNY );

  	var cameraPZ = new PerspectiveCamera( fov, aspect, near, far );
  	cameraPZ.up.set( 0, - 1, 0 );
  	cameraPZ.lookAt( new Vector3( 0, 0, 1 ) );
  	this.add( cameraPZ );

  	var cameraNZ = new PerspectiveCamera( fov, aspect, near, far );
  	cameraNZ.up.set( 0, - 1, 0 );
  	cameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );
  	this.add( cameraNZ );

  	var options = { format: RGBFormat, magFilter: LinearFilter, minFilter: LinearFilter };

  	this.renderTarget = new WebGLRenderTargetCube( cubeResolution, cubeResolution, options );

  	this.updateCubeMap = function ( renderer, scene ) {

  		if ( this.parent === null ) this.updateMatrixWorld();

  		var renderTarget = this.renderTarget;
  		var generateMipmaps = renderTarget.texture.generateMipmaps;

  		renderTarget.texture.generateMipmaps = false;

  		renderTarget.activeCubeFace = 0;
  		renderer.render( scene, cameraPX, renderTarget );

  		renderTarget.activeCubeFace = 1;
  		renderer.render( scene, cameraNX, renderTarget );

  		renderTarget.activeCubeFace = 2;
  		renderer.render( scene, cameraPY, renderTarget );

  		renderTarget.activeCubeFace = 3;
  		renderer.render( scene, cameraNY, renderTarget );

  		renderTarget.activeCubeFace = 4;
  		renderer.render( scene, cameraPZ, renderTarget );

  		renderTarget.texture.generateMipmaps = generateMipmaps;

  		renderTarget.activeCubeFace = 5;
  		renderer.render( scene, cameraNZ, renderTarget );

  		renderer.setRenderTarget( null );

  	};

  };

  CubeCamera.prototype = Object.create( Object3D.prototype );
  CubeCamera.prototype.constructor = CubeCamera;

  function AudioListener() {

  	Object3D.call( this );

  	this.type = 'AudioListener';

  	this.context = getAudioContext();

  	this.gain = this.context.createGain();
  	this.gain.connect( this.context.destination );

  	this.filter = null;

  }

  AudioListener.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: AudioListener,

  	getInput: function () {

  		return this.gain;

  	},

  	removeFilter: function ( ) {

  		if ( this.filter !== null ) {

  			this.gain.disconnect( this.filter );
  			this.filter.disconnect( this.context.destination );
  			this.gain.connect( this.context.destination );
  			this.filter = null;

  		}

  	},

  	getFilter: function () {

  		return this.filter;

  	},

  	setFilter: function ( value ) {

  		if ( this.filter !== null ) {

  			this.gain.disconnect( this.filter );
  			this.filter.disconnect( this.context.destination );

  		} else {

  			this.gain.disconnect( this.context.destination );

  		}

  		this.filter = value;
  		this.gain.connect( this.filter );
  		this.filter.connect( this.context.destination );

  	},

  	getMasterVolume: function () {

  		return this.gain.gain.value;

  	},

  	setMasterVolume: function ( value ) {

  		this.gain.gain.value = value;

  	},

  	updateMatrixWorld: ( function () {

  		var position = new Vector3();
  		var quaternion = new Quaternion();
  		var scale = new Vector3();

  		var orientation = new Vector3();

  		return function updateMatrixWorld( force ) {

  			Object3D.prototype.updateMatrixWorld.call( this, force );

  			var listener = this.context.listener;
  			var up = this.up;

  			this.matrixWorld.decompose( position, quaternion, scale );

  			orientation.set( 0, 0, - 1 ).applyQuaternion( quaternion );

  			listener.setPosition( position.x, position.y, position.z );
  			listener.setOrientation( orientation.x, orientation.y, orientation.z, up.x, up.y, up.z );

  		};

  	} )()

  } );

  function Audio( listener ) {

  	Object3D.call( this );

  	this.type = 'Audio';

  	this.context = listener.context;
  	this.source = this.context.createBufferSource();
  	this.source.onended = this.onEnded.bind( this );

  	this.gain = this.context.createGain();
  	this.gain.connect( listener.getInput() );

  	this.autoplay = false;

  	this.startTime = 0;
  	this.playbackRate = 1;
  	this.isPlaying = false;
  	this.hasPlaybackControl = true;
  	this.sourceType = 'empty';

  	this.filters = [];

  }

  Audio.prototype = Object.assign( Object.create( Object3D.prototype ), {

  	constructor: Audio,

  	getOutput: function () {

  		return this.gain;

  	},

  	setNodeSource: function ( audioNode ) {

  		this.hasPlaybackControl = false;
  		this.sourceType = 'audioNode';
  		this.source = audioNode;
  		this.connect();

  		return this;

  	},

  	setBuffer: function ( audioBuffer ) {

  		this.source.buffer = audioBuffer;
  		this.sourceType = 'buffer';

  		if ( this.autoplay ) this.play();

  		return this;

  	},

  	play: function () {

  		if ( this.isPlaying === true ) {

  			console.warn( 'THREE.Audio: Audio is already playing.' );
  			return;

  		}

  		if ( this.hasPlaybackControl === false ) {

  			console.warn( 'THREE.Audio: this Audio has no playback control.' );
  			return;

  		}

  		var source = this.context.createBufferSource();

  		source.buffer = this.source.buffer;
  		source.loop = this.source.loop;
  		source.onended = this.source.onended;
  		source.start( 0, this.startTime );
  		source.playbackRate.value = this.playbackRate;

  		this.isPlaying = true;

  		this.source = source;

  		return this.connect();

  	},

  	pause: function () {

  		if ( this.hasPlaybackControl === false ) {

  			console.warn( 'THREE.Audio: this Audio has no playback control.' );
  			return;

  		}

  		this.source.stop();
  		this.startTime = this.context.currentTime;
  		this.isPlaying = false;

  		return this;

  	},

  	stop: function () {

  		if ( this.hasPlaybackControl === false ) {

  			console.warn( 'THREE.Audio: this Audio has no playback control.' );
  			return;

  		}

  		this.source.stop();
  		this.startTime = 0;
  		this.isPlaying = false;

  		return this;

  	},

  	connect: function () {

  		if ( this.filters.length > 0 ) {

  			this.source.connect( this.filters[ 0 ] );

  			for ( var i = 1, l = this.filters.length; i < l; i ++ ) {

  				this.filters[ i - 1 ].connect( this.filters[ i ] );

  			}

  			this.filters[ this.filters.length - 1 ].connect( this.getOutput() );

  		} else {

  			this.source.connect( this.getOutput() );

  		}

  		return this;

  	},

  	disconnect: function () {

  		if ( this.filters.length > 0 ) {

  			this.source.disconnect( this.filters[ 0 ] );

  			for ( var i = 1, l = this.filters.length; i < l; i ++ ) {

  				this.filters[ i - 1 ].disconnect( this.filters[ i ] );

  			}

  			this.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );

  		} else {

  			this.source.disconnect( this.getOutput() );

  		}

  		return this;

  	},

  	getFilters: function () {

  		return this.filters;

  	},

  	setFilters: function ( value ) {

  		if ( ! value ) value = [];

  		if ( this.isPlaying === true ) {

  			this.disconnect();
  			this.filters = value;
  			this.connect();

  		} else {

  			this.filters = value;

  		}

  		return this;

  	},

  	getFilter: function () {

  		return this.getFilters()[ 0 ];

  	},

  	setFilter: function ( filter ) {

  		return this.setFilters( filter ? [ filter ] : [] );

  	},

  	setPlaybackRate: function ( value ) {

  		if ( this.hasPlaybackControl === false ) {

  			console.warn( 'THREE.Audio: this Audio has no playback control.' );
  			return;

  		}

  		this.playbackRate = value;

  		if ( this.isPlaying === true ) {

  			this.source.playbackRate.value = this.playbackRate;

  		}

  		return this;

  	},

  	getPlaybackRate: function () {

  		return this.playbackRate;

  	},

  	onEnded: function () {

  		this.isPlaying = false;

  	},

  	getLoop: function () {

  		if ( this.hasPlaybackControl === false ) {

  			console.warn( 'THREE.Audio: this Audio has no playback control.' );
  			return false;

  		}

  		return this.source.loop;

  	},

  	setLoop: function ( value ) {

  		if ( this.hasPlaybackControl === false ) {

  			console.warn( 'THREE.Audio: this Audio has no playback control.' );
  			return;

  		}

  		this.source.loop = value;

  	},

  	getVolume: function () {

  		return this.gain.gain.value;

  	},


  	setVolume: function ( value ) {

  		this.gain.gain.value = value;

  		return this;

  	}

  } );

  function PositionalAudio( listener ) {

  	Audio.call( this, listener );

  	this.panner = this.context.createPanner();
  	this.panner.connect( this.gain );

  }

  PositionalAudio.prototype = Object.assign( Object.create( Audio.prototype ), {

  	constructor: PositionalAudio,

  	getOutput: function () {

  		return this.panner;

  	},

  	getRefDistance: function () {

  		return this.panner.refDistance;

  	},

  	setRefDistance: function ( value ) {

  		this.panner.refDistance = value;

  	},

  	getRolloffFactor: function () {

  		return this.panner.rolloffFactor;

  	},

  	setRolloffFactor: function ( value ) {

  		this.panner.rolloffFactor = value;

  	},

  	getDistanceModel: function () {

  		return this.panner.distanceModel;

  	},

  	setDistanceModel: function ( value ) {

  		this.panner.distanceModel = value;

  	},

  	getMaxDistance: function () {

  		return this.panner.maxDistance;

  	},

  	setMaxDistance: function ( value ) {

  		this.panner.maxDistance = value;

  	},

  	updateMatrixWorld: ( function () {

  		var position = new Vector3();

  		return function updateMatrixWorld( force ) {

  			Object3D.prototype.updateMatrixWorld.call( this, force );

  			position.setFromMatrixPosition( this.matrixWorld );

  			this.panner.setPosition( position.x, position.y, position.z );

  		};

  	} )()


  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function AudioAnalyser( audio, fftSize ) {

  	this.analyser = audio.context.createAnalyser();
  	this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;

  	this.data = new Uint8Array( this.analyser.frequencyBinCount );

  	audio.getOutput().connect( this.analyser );

  }

  Object.assign( AudioAnalyser.prototype, {

  	getFrequencyData: function () {

  		this.analyser.getByteFrequencyData( this.data );

  		return this.data;

  	},

  	getAverageFrequency: function () {

  		var value = 0, data = this.getFrequencyData();

  		for ( var i = 0; i < data.length; i ++ ) {

  			value += data[ i ];

  		}

  		return value / data.length;

  	}

  } );

  /**
   *
   * Buffered scene graph property that allows weighted accumulation.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function PropertyMixer( binding, typeName, valueSize ) {

  	this.binding = binding;
  	this.valueSize = valueSize;

  	var bufferType = Float64Array,
  		mixFunction;

  	switch ( typeName ) {

  		case 'quaternion':			mixFunction = this._slerp;		break;

  		case 'string':
  		case 'bool':

  			bufferType = Array,		mixFunction = this._select;		break;

  		default:					mixFunction = this._lerp;

  	}

  	this.buffer = new bufferType( valueSize * 4 );
  	// layout: [ incoming | accu0 | accu1 | orig ]
  	//
  	// interpolators can use .buffer as their .result
  	// the data then goes to 'incoming'
  	//
  	// 'accu0' and 'accu1' are used frame-interleaved for
  	// the cumulative result and are compared to detect
  	// changes
  	//
  	// 'orig' stores the original state of the property

  	this._mixBufferRegion = mixFunction;

  	this.cumulativeWeight = 0;

  	this.useCount = 0;
  	this.referenceCount = 0;

  };

  PropertyMixer.prototype = {

  	constructor: PropertyMixer,

  	// accumulate data in the 'incoming' region into 'accu<i>'
  	accumulate: function( accuIndex, weight ) {

  		// note: happily accumulating nothing when weight = 0, the caller knows
  		// the weight and shouldn't have made the call in the first place

  		var buffer = this.buffer,
  			stride = this.valueSize,
  			offset = accuIndex * stride + stride,

  			currentWeight = this.cumulativeWeight;

  		if ( currentWeight === 0 ) {

  			// accuN := incoming * weight

  			for ( var i = 0; i !== stride; ++ i ) {

  				buffer[ offset + i ] = buffer[ i ];

  			}

  			currentWeight = weight;

  		} else {

  			// accuN := accuN + incoming * weight

  			currentWeight += weight;
  			var mix = weight / currentWeight;
  			this._mixBufferRegion( buffer, offset, 0, mix, stride );

  		}

  		this.cumulativeWeight = currentWeight;

  	},

  	// apply the state of 'accu<i>' to the binding when accus differ
  	apply: function( accuIndex ) {

  		var stride = this.valueSize,
  			buffer = this.buffer,
  			offset = accuIndex * stride + stride,

  			weight = this.cumulativeWeight,

  			binding = this.binding;

  		this.cumulativeWeight = 0;

  		if ( weight < 1 ) {

  			// accuN := accuN + original * ( 1 - cumulativeWeight )

  			var originalValueOffset = stride * 3;

  			this._mixBufferRegion(
  					buffer, offset, originalValueOffset, 1 - weight, stride );

  		}

  		for ( var i = stride, e = stride + stride; i !== e; ++ i ) {

  			if ( buffer[ i ] !== buffer[ i + stride ] ) {

  				// value has changed -> update scene graph

  				binding.setValue( buffer, offset );
  				break;

  			}

  		}

  	},

  	// remember the state of the bound property and copy it to both accus
  	saveOriginalState: function() {

  		var binding = this.binding;

  		var buffer = this.buffer,
  			stride = this.valueSize,

  			originalValueOffset = stride * 3;

  		binding.getValue( buffer, originalValueOffset );

  		// accu[0..1] := orig -- initially detect changes against the original
  		for ( var i = stride, e = originalValueOffset; i !== e; ++ i ) {

  			buffer[ i ] = buffer[ originalValueOffset + ( i % stride ) ];

  		}

  		this.cumulativeWeight = 0;

  	},

  	// apply the state previously taken via 'saveOriginalState' to the binding
  	restoreOriginalState: function() {

  		var originalValueOffset = this.valueSize * 3;
  		this.binding.setValue( this.buffer, originalValueOffset );

  	},


  	// mix functions

  	_select: function( buffer, dstOffset, srcOffset, t, stride ) {

  		if ( t >= 0.5 ) {

  			for ( var i = 0; i !== stride; ++ i ) {

  				buffer[ dstOffset + i ] = buffer[ srcOffset + i ];

  			}

  		}

  	},

  	_slerp: function( buffer, dstOffset, srcOffset, t, stride ) {

  		Quaternion.slerpFlat( buffer, dstOffset,
  				buffer, dstOffset, buffer, srcOffset, t );

  	},

  	_lerp: function( buffer, dstOffset, srcOffset, t, stride ) {

  		var s = 1 - t;

  		for ( var i = 0; i !== stride; ++ i ) {

  			var j = dstOffset + i;

  			buffer[ j ] = buffer[ j ] * s + buffer[ srcOffset + i ] * t;

  		}

  	}

  };

  /**
   *
   * A reference to a real property in the scene graph.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function PropertyBinding( rootNode, path, parsedPath ) {

  	this.path = path;
  	this.parsedPath = parsedPath ||
  			PropertyBinding.parseTrackName( path );

  	this.node = PropertyBinding.findNode(
  			rootNode, this.parsedPath.nodeName ) || rootNode;

  	this.rootNode = rootNode;

  };

  PropertyBinding.prototype = {

  	constructor: PropertyBinding,

  	getValue: function getValue_unbound( targetArray, offset ) {

  		this.bind();
  		this.getValue( targetArray, offset );

  		// Note: This class uses a State pattern on a per-method basis:
  		// 'bind' sets 'this.getValue' / 'setValue' and shadows the
  		// prototype version of these methods with one that represents
  		// the bound state. When the property is not found, the methods
  		// become no-ops.

  	},

  	setValue: function getValue_unbound( sourceArray, offset ) {

  		this.bind();
  		this.setValue( sourceArray, offset );

  	},

  	// create getter / setter pair for a property in the scene graph
  	bind: function() {

  		var targetObject = this.node,
  			parsedPath = this.parsedPath,

  			objectName = parsedPath.objectName,
  			propertyName = parsedPath.propertyName,
  			propertyIndex = parsedPath.propertyIndex;

  		if ( ! targetObject ) {

  			targetObject = PropertyBinding.findNode(
  					this.rootNode, parsedPath.nodeName ) || this.rootNode;

  			this.node = targetObject;

  		}

  		// set fail state so we can just 'return' on error
  		this.getValue = this._getValue_unavailable;
  		this.setValue = this._setValue_unavailable;

   		// ensure there is a value node
  		if ( ! targetObject ) {

  			console.error( "  trying to update node for track: " + this.path + " but it wasn't found." );
  			return;

  		}

  		if ( objectName ) {

  			var objectIndex = parsedPath.objectIndex;

  			// special cases were we need to reach deeper into the hierarchy to get the face materials....
  			switch ( objectName ) {

  				case 'materials':

  					if ( ! targetObject.material ) {

  						console.error( '  can not bind to material as node does not have a material', this );
  						return;

  					}

  					if ( ! targetObject.material.materials ) {

  						console.error( '  can not bind to material.materials as node.material does not have a materials array', this );
  						return;

  					}

  					targetObject = targetObject.material.materials;

  					break;

  				case 'bones':

  					if ( ! targetObject.skeleton ) {

  						console.error( '  can not bind to bones as node does not have a skeleton', this );
  						return;

  					}

  					// potential future optimization: skip this if propertyIndex is already an integer
  					// and convert the integer string to a true integer.

  					targetObject = targetObject.skeleton.bones;

  					// support resolving morphTarget names into indices.
  					for ( var i = 0; i < targetObject.length; i ++ ) {

  						if ( targetObject[ i ].name === objectIndex ) {

  							objectIndex = i;
  							break;

  						}

  					}

  					break;

  				default:

  					if ( targetObject[ objectName ] === undefined ) {

  						console.error( '  can not bind to objectName of node, undefined', this );
  						return;

  					}

  					targetObject = targetObject[ objectName ];

  			}


  			if ( objectIndex !== undefined ) {

  				if ( targetObject[ objectIndex ] === undefined ) {

  					console.error( "  trying to bind to objectIndex of objectName, but is undefined:", this, targetObject );
  					return;

  				}

  				targetObject = targetObject[ objectIndex ];

  			}

  		}

  		// resolve property
  		var nodeProperty = targetObject[ propertyName ];

  		if ( nodeProperty === undefined ) {

  			var nodeName = parsedPath.nodeName;

  			console.error( "  trying to update property for track: " + nodeName +
  					'.' + propertyName + " but it wasn't found.", targetObject );
  			return;

  		}

  		// determine versioning scheme
  		var versioning = this.Versioning.None;

  		if ( targetObject.needsUpdate !== undefined ) { // material

  			versioning = this.Versioning.NeedsUpdate;
  			this.targetObject = targetObject;

  		} else if ( targetObject.matrixWorldNeedsUpdate !== undefined ) { // node transform

  			versioning = this.Versioning.MatrixWorldNeedsUpdate;
  			this.targetObject = targetObject;

  		}

  		// determine how the property gets bound
  		var bindingType = this.BindingType.Direct;

  		if ( propertyIndex !== undefined ) {
  			// access a sub element of the property array (only primitives are supported right now)

  			if ( propertyName === "morphTargetInfluences" ) {
  				// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.

  				// support resolving morphTarget names into indices.
  				if ( ! targetObject.geometry ) {

  					console.error( '  can not bind to morphTargetInfluences becasuse node does not have a geometry', this );
  					return;

  				}

  				if ( ! targetObject.geometry.morphTargets ) {

  					console.error( '  can not bind to morphTargetInfluences becasuse node does not have a geometry.morphTargets', this );
  					return;

  				}

  				for ( var i = 0; i < this.node.geometry.morphTargets.length; i ++ ) {

  					if ( targetObject.geometry.morphTargets[ i ].name === propertyIndex ) {

  						propertyIndex = i;
  						break;

  					}

  				}

  			}

  			bindingType = this.BindingType.ArrayElement;

  			this.resolvedProperty = nodeProperty;
  			this.propertyIndex = propertyIndex;

  		} else if ( nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined ) {
  			// must use copy for Object3D.Euler/Quaternion

  			bindingType = this.BindingType.HasFromToArray;

  			this.resolvedProperty = nodeProperty;

  		} else if ( nodeProperty.length !== undefined ) {

  			bindingType = this.BindingType.EntireArray;

  			this.resolvedProperty = nodeProperty;

  		} else {

  			this.propertyName = propertyName;

  		}

  		// select getter / setter
  		this.getValue = this.GetterByBindingType[ bindingType ];
  		this.setValue = this.SetterByBindingTypeAndVersioning[ bindingType ][ versioning ];

  	},

  	unbind: function() {

  		this.node = null;

  		// back to the prototype version of getValue / setValue
  		// note: avoiding to mutate the shape of 'this' via 'delete'
  		this.getValue = this._getValue_unbound;
  		this.setValue = this._setValue_unbound;

  	}

  };

  Object.assign( PropertyBinding.prototype, { // prototype, continued

  	// these are used to "bind" a nonexistent property
  	_getValue_unavailable: function() {},
  	_setValue_unavailable: function() {},

  	// initial state of these methods that calls 'bind'
  	_getValue_unbound: PropertyBinding.prototype.getValue,
  	_setValue_unbound: PropertyBinding.prototype.setValue,

  	BindingType: {
  		Direct: 0,
  		EntireArray: 1,
  		ArrayElement: 2,
  		HasFromToArray: 3
  	},

  	Versioning: {
  		None: 0,
  		NeedsUpdate: 1,
  		MatrixWorldNeedsUpdate: 2
  	},

  	GetterByBindingType: [

  		function getValue_direct( buffer, offset ) {

  			buffer[ offset ] = this.node[ this.propertyName ];

  		},

  		function getValue_array( buffer, offset ) {

  			var source = this.resolvedProperty;

  			for ( var i = 0, n = source.length; i !== n; ++ i ) {

  				buffer[ offset ++ ] = source[ i ];

  			}

  		},

  		function getValue_arrayElement( buffer, offset ) {

  			buffer[ offset ] = this.resolvedProperty[ this.propertyIndex ];

  		},

  		function getValue_toArray( buffer, offset ) {

  			this.resolvedProperty.toArray( buffer, offset );

  		}

  	],

  	SetterByBindingTypeAndVersioning: [

  		[
  			// Direct

  			function setValue_direct( buffer, offset ) {

  				this.node[ this.propertyName ] = buffer[ offset ];

  			},

  			function setValue_direct_setNeedsUpdate( buffer, offset ) {

  				this.node[ this.propertyName ] = buffer[ offset ];
  				this.targetObject.needsUpdate = true;

  			},

  			function setValue_direct_setMatrixWorldNeedsUpdate( buffer, offset ) {

  				this.node[ this.propertyName ] = buffer[ offset ];
  				this.targetObject.matrixWorldNeedsUpdate = true;

  			}

  		], [

  			// EntireArray

  			function setValue_array( buffer, offset ) {

  				var dest = this.resolvedProperty;

  				for ( var i = 0, n = dest.length; i !== n; ++ i ) {

  					dest[ i ] = buffer[ offset ++ ];

  				}

  			},

  			function setValue_array_setNeedsUpdate( buffer, offset ) {

  				var dest = this.resolvedProperty;

  				for ( var i = 0, n = dest.length; i !== n; ++ i ) {

  					dest[ i ] = buffer[ offset ++ ];

  				}

  				this.targetObject.needsUpdate = true;

  			},

  			function setValue_array_setMatrixWorldNeedsUpdate( buffer, offset ) {

  				var dest = this.resolvedProperty;

  				for ( var i = 0, n = dest.length; i !== n; ++ i ) {

  					dest[ i ] = buffer[ offset ++ ];

  				}

  				this.targetObject.matrixWorldNeedsUpdate = true;

  			}

  		], [

  			// ArrayElement

  			function setValue_arrayElement( buffer, offset ) {

  				this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];

  			},

  			function setValue_arrayElement_setNeedsUpdate( buffer, offset ) {

  				this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
  				this.targetObject.needsUpdate = true;

  			},

  			function setValue_arrayElement_setMatrixWorldNeedsUpdate( buffer, offset ) {

  				this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
  				this.targetObject.matrixWorldNeedsUpdate = true;

  			}

  		], [

  			// HasToFromArray

  			function setValue_fromArray( buffer, offset ) {

  				this.resolvedProperty.fromArray( buffer, offset );

  			},

  			function setValue_fromArray_setNeedsUpdate( buffer, offset ) {

  				this.resolvedProperty.fromArray( buffer, offset );
  				this.targetObject.needsUpdate = true;

  			},

  			function setValue_fromArray_setMatrixWorldNeedsUpdate( buffer, offset ) {

  				this.resolvedProperty.fromArray( buffer, offset );
  				this.targetObject.matrixWorldNeedsUpdate = true;

  			}

  		]

  	]

  } );

  PropertyBinding.Composite =
  		function( targetGroup, path, optionalParsedPath ) {

  	var parsedPath = optionalParsedPath ||
  			PropertyBinding.parseTrackName( path );

  	this._targetGroup = targetGroup;
  	this._bindings = targetGroup.subscribe_( path, parsedPath );

  };

  PropertyBinding.Composite.prototype = {

  	constructor: PropertyBinding.Composite,

  	getValue: function( array, offset ) {

  		this.bind(); // bind all binding

  		var firstValidIndex = this._targetGroup.nCachedObjects_,
  			binding = this._bindings[ firstValidIndex ];

  		// and only call .getValue on the first
  		if ( binding !== undefined ) binding.getValue( array, offset );

  	},

  	setValue: function( array, offset ) {

  		var bindings = this._bindings;

  		for ( var i = this._targetGroup.nCachedObjects_,
  				n = bindings.length; i !== n; ++ i ) {

  			bindings[ i ].setValue( array, offset );

  		}

  	},

  	bind: function() {

  		var bindings = this._bindings;

  		for ( var i = this._targetGroup.nCachedObjects_,
  				n = bindings.length; i !== n; ++ i ) {

  			bindings[ i ].bind();

  		}

  	},

  	unbind: function() {

  		var bindings = this._bindings;

  		for ( var i = this._targetGroup.nCachedObjects_,
  				n = bindings.length; i !== n; ++ i ) {

  			bindings[ i ].unbind();

  		}

  	}

  };

  PropertyBinding.create = function( root, path, parsedPath ) {

  	if ( ! ( (root && root.isAnimationObjectGroup) ) ) {

  		return new PropertyBinding( root, path, parsedPath );

  	} else {

  		return new PropertyBinding.Composite( root, path, parsedPath );

  	}

  };

  PropertyBinding.parseTrackName = function( trackName ) {

  	// matches strings in the form of:
  	//    nodeName.property
  	//    nodeName.property[accessor]
  	//    nodeName.material.property[accessor]
  	//    uuid.property[accessor]
  	//    uuid.objectName[objectIndex].propertyName[propertyIndex]
  	//    parentName/nodeName.property
  	//    parentName/parentName/nodeName.property[index]
  	//	  .bone[Armature.DEF_cog].position
  	// created and tested via https://regex101.com/#javascript

  	var re = /^(([\w]+\/)*)([\w-\d]+)?(\.([\w]+)(\[([\w\d\[\]\_.:\- ]+)\])?)?(\.([\w.]+)(\[([\w\d\[\]\_. ]+)\])?)$/;
  	var matches = re.exec( trackName );

  	if ( ! matches ) {

  		throw new Error( "cannot parse trackName at all: " + trackName );

  	}

  	if ( matches.index === re.lastIndex ) {

  		re.lastIndex++;

  	}

  	var results = {
  		// directoryName: matches[ 1 ], // (tschw) currently unused
  		nodeName: matches[ 3 ], 	// allowed to be null, specified root node.
  		objectName: matches[ 5 ],
  		objectIndex: matches[ 7 ],
  		propertyName: matches[ 9 ],
  		propertyIndex: matches[ 11 ]	// allowed to be null, specifies that the whole property is set.
  	};

  	if ( results.propertyName === null || results.propertyName.length === 0 ) {

  		throw new Error( "can not parse propertyName from trackName: " + trackName );

  	}

  	return results;

  };

  PropertyBinding.findNode = function( root, nodeName ) {

  	if ( ! nodeName || nodeName === "" || nodeName === "root" || nodeName === "." || nodeName === -1 || nodeName === root.name || nodeName === root.uuid ) {

  		return root;

  	}

  	// search into skeleton bones.
  	if ( root.skeleton ) {

  		var searchSkeleton = function( skeleton ) {

  			for( var i = 0; i < skeleton.bones.length; i ++ ) {

  				var bone = skeleton.bones[ i ];

  				if ( bone.name === nodeName ) {

  					return bone;

  				}
  			}

  			return null;

  		};

  		var bone = searchSkeleton( root.skeleton );

  		if ( bone ) {

  			return bone;

  		}
  	}

  	// search into node subtree.
  	if ( root.children ) {

  		var searchNodeSubtree = function( children ) {

  			for( var i = 0; i < children.length; i ++ ) {

  				var childNode = children[ i ];

  				if ( childNode.name === nodeName || childNode.uuid === nodeName ) {

  					return childNode;

  				}

  				var result = searchNodeSubtree( childNode.children );

  				if ( result ) return result;

  			}

  			return null;

  		};

  		var subTreeNode = searchNodeSubtree( root.children );

  		if ( subTreeNode ) {

  			return subTreeNode;

  		}

  	}

  	return null;

  };

  /**
   *
   * A group of objects that receives a shared animation state.
   *
   * Usage:
   *
   * 	-	Add objects you would otherwise pass as 'root' to the
   * 		constructor or the .clipAction method of AnimationMixer.
   *
   * 	-	Instead pass this object as 'root'.
   *
   * 	-	You can also add and remove objects later when the mixer
   * 		is running.
   *
   * Note:
   *
   *  	Objects of this class appear as one object to the mixer,
   *  	so cache control of the individual objects must be done
   *  	on the group.
   *
   * Limitation:
   *
   * 	- 	The animated properties must be compatible among the
   * 		all objects in the group.
   *
   *  -	A single property can either be controlled through a
   *  	target group or directly, but not both.
   *
   * @author tschw
   */

  function AnimationObjectGroup( var_args ) {

  	this.uuid = exports.Math.generateUUID();

  	// cached objects followed by the active ones
  	this._objects = Array.prototype.slice.call( arguments );

  	this.nCachedObjects_ = 0;			// threshold
  	// note: read by PropertyBinding.Composite

  	var indices = {};
  	this._indicesByUUID = indices;		// for bookkeeping

  	for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

  		indices[ arguments[ i ].uuid ] = i;

  	}

  	this._paths = [];					// inside: string
  	this._parsedPaths = [];				// inside: { we don't care, here }
  	this._bindings = []; 				// inside: Array< PropertyBinding >
  	this._bindingsIndicesByPath = {}; 	// inside: indices in these arrays

  	var scope = this;

  	this.stats = {

  		objects: {
  			get total() { return scope._objects.length; },
  			get inUse() { return this.total - scope.nCachedObjects_;  }
  		},

  		get bindingsPerObject() { return scope._bindings.length; }

  	};

  };

  AnimationObjectGroup.prototype = {

  	constructor: AnimationObjectGroup,

  	isAnimationObjectGroup: true,

  	add: function( var_args ) {

  		var objects = this._objects,
  			nObjects = objects.length,
  			nCachedObjects = this.nCachedObjects_,
  			indicesByUUID = this._indicesByUUID,
  			paths = this._paths,
  			parsedPaths = this._parsedPaths,
  			bindings = this._bindings,
  			nBindings = bindings.length;

  		for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

  			var object = arguments[ i ],
  				uuid = object.uuid,
  				index = indicesByUUID[ uuid ];

  			if ( index === undefined ) {

  				// unknown object -> add it to the ACTIVE region

  				index = nObjects ++;
  				indicesByUUID[ uuid ] = index;
  				objects.push( object );

  				// accounting is done, now do the same for all bindings

  				for ( var j = 0, m = nBindings; j !== m; ++ j ) {

  					bindings[ j ].push(
  							new PropertyBinding(
  								object, paths[ j ], parsedPaths[ j ] ) );

  				}

  			} else if ( index < nCachedObjects ) {

  				var knownObject = objects[ index ];

  				// move existing object to the ACTIVE region

  				var firstActiveIndex = -- nCachedObjects,
  					lastCachedObject = objects[ firstActiveIndex ];

  				indicesByUUID[ lastCachedObject.uuid ] = index;
  				objects[ index ] = lastCachedObject;

  				indicesByUUID[ uuid ] = firstActiveIndex;
  				objects[ firstActiveIndex ] = object;

  				// accounting is done, now do the same for all bindings

  				for ( var j = 0, m = nBindings; j !== m; ++ j ) {

  					var bindingsForPath = bindings[ j ],
  						lastCached = bindingsForPath[ firstActiveIndex ],
  						binding = bindingsForPath[ index ];

  					bindingsForPath[ index ] = lastCached;

  					if ( binding === undefined ) {

  						// since we do not bother to create new bindings
  						// for objects that are cached, the binding may
  						// or may not exist

  						binding = new PropertyBinding(
  								object, paths[ j ], parsedPaths[ j ] );

  					}

  					bindingsForPath[ firstActiveIndex ] = binding;

  				}

  			} else if ( objects[ index ] !== knownObject) {

  				console.error( "Different objects with the same UUID " +
  						"detected. Clean the caches or recreate your " +
  						"infrastructure when reloading scenes..." );

  			} // else the object is already where we want it to be

  		} // for arguments

  		this.nCachedObjects_ = nCachedObjects;

  	},

  	remove: function( var_args ) {

  		var objects = this._objects,
  			nCachedObjects = this.nCachedObjects_,
  			indicesByUUID = this._indicesByUUID,
  			bindings = this._bindings,
  			nBindings = bindings.length;

  		for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

  			var object = arguments[ i ],
  				uuid = object.uuid,
  				index = indicesByUUID[ uuid ];

  			if ( index !== undefined && index >= nCachedObjects ) {

  				// move existing object into the CACHED region

  				var lastCachedIndex = nCachedObjects ++,
  					firstActiveObject = objects[ lastCachedIndex ];

  				indicesByUUID[ firstActiveObject.uuid ] = index;
  				objects[ index ] = firstActiveObject;

  				indicesByUUID[ uuid ] = lastCachedIndex;
  				objects[ lastCachedIndex ] = object;

  				// accounting is done, now do the same for all bindings

  				for ( var j = 0, m = nBindings; j !== m; ++ j ) {

  					var bindingsForPath = bindings[ j ],
  						firstActive = bindingsForPath[ lastCachedIndex ],
  						binding = bindingsForPath[ index ];

  					bindingsForPath[ index ] = firstActive;
  					bindingsForPath[ lastCachedIndex ] = binding;

  				}

  			}

  		} // for arguments

  		this.nCachedObjects_ = nCachedObjects;

  	},

  	// remove & forget
  	uncache: function( var_args ) {

  		var objects = this._objects,
  			nObjects = objects.length,
  			nCachedObjects = this.nCachedObjects_,
  			indicesByUUID = this._indicesByUUID,
  			bindings = this._bindings,
  			nBindings = bindings.length;

  		for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

  			var object = arguments[ i ],
  				uuid = object.uuid,
  				index = indicesByUUID[ uuid ];

  			if ( index !== undefined ) {

  				delete indicesByUUID[ uuid ];

  				if ( index < nCachedObjects ) {

  					// object is cached, shrink the CACHED region

  					var firstActiveIndex = -- nCachedObjects,
  						lastCachedObject = objects[ firstActiveIndex ],
  						lastIndex = -- nObjects,
  						lastObject = objects[ lastIndex ];

  					// last cached object takes this object's place
  					indicesByUUID[ lastCachedObject.uuid ] = index;
  					objects[ index ] = lastCachedObject;

  					// last object goes to the activated slot and pop
  					indicesByUUID[ lastObject.uuid ] = firstActiveIndex;
  					objects[ firstActiveIndex ] = lastObject;
  					objects.pop();

  					// accounting is done, now do the same for all bindings

  					for ( var j = 0, m = nBindings; j !== m; ++ j ) {

  						var bindingsForPath = bindings[ j ],
  							lastCached = bindingsForPath[ firstActiveIndex ],
  							last = bindingsForPath[ lastIndex ];

  						bindingsForPath[ index ] = lastCached;
  						bindingsForPath[ firstActiveIndex ] = last;
  						bindingsForPath.pop();

  					}

  				} else {

  					// object is active, just swap with the last and pop

  					var lastIndex = -- nObjects,
  						lastObject = objects[ lastIndex ];

  					indicesByUUID[ lastObject.uuid ] = index;
  					objects[ index ] = lastObject;
  					objects.pop();

  					// accounting is done, now do the same for all bindings

  					for ( var j = 0, m = nBindings; j !== m; ++ j ) {

  						var bindingsForPath = bindings[ j ];

  						bindingsForPath[ index ] = bindingsForPath[ lastIndex ];
  						bindingsForPath.pop();

  					}

  				} // cached or active

  			} // if object is known

  		} // for arguments

  		this.nCachedObjects_ = nCachedObjects;

  	},

  	// Internal interface used by befriended PropertyBinding.Composite:

  	subscribe_: function( path, parsedPath ) {
  		// returns an array of bindings for the given path that is changed
  		// according to the contained objects in the group

  		var indicesByPath = this._bindingsIndicesByPath,
  			index = indicesByPath[ path ],
  			bindings = this._bindings;

  		if ( index !== undefined ) return bindings[ index ];

  		var paths = this._paths,
  			parsedPaths = this._parsedPaths,
  			objects = this._objects,
  			nObjects = objects.length,
  			nCachedObjects = this.nCachedObjects_,
  			bindingsForPath = new Array( nObjects );

  		index = bindings.length;

  		indicesByPath[ path ] = index;

  		paths.push( path );
  		parsedPaths.push( parsedPath );
  		bindings.push( bindingsForPath );

  		for ( var i = nCachedObjects,
  				n = objects.length; i !== n; ++ i ) {

  			var object = objects[ i ];

  			bindingsForPath[ i ] =
  					new PropertyBinding( object, path, parsedPath );

  		}

  		return bindingsForPath;

  	},

  	unsubscribe_: function( path ) {
  		// tells the group to forget about a property path and no longer
  		// update the array previously obtained with 'subscribe_'

  		var indicesByPath = this._bindingsIndicesByPath,
  			index = indicesByPath[ path ];

  		if ( index !== undefined ) {

  			var paths = this._paths,
  				parsedPaths = this._parsedPaths,
  				bindings = this._bindings,
  				lastBindingsIndex = bindings.length - 1,
  				lastBindings = bindings[ lastBindingsIndex ],
  				lastBindingsPath = path[ lastBindingsIndex ];

  			indicesByPath[ lastBindingsPath ] = index;

  			bindings[ index ] = lastBindings;
  			bindings.pop();

  			parsedPaths[ index ] = parsedPaths[ lastBindingsIndex ];
  			parsedPaths.pop();

  			paths[ index ] = paths[ lastBindingsIndex ];
  			paths.pop();

  		}

  	}

  };

  /**
   *
   * Action provided by AnimationMixer for scheduling clip playback on specific
   * objects.
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   *
   */

  function AnimationAction() {

  	throw new Error( "THREE.AnimationAction: " +
  			"Use mixer.clipAction for construction." );

  };

  AnimationAction._new =
  		function AnimationAction( mixer, clip, localRoot ) {

  	this._mixer = mixer;
  	this._clip = clip;
  	this._localRoot = localRoot || null;

  	var tracks = clip.tracks,
  		nTracks = tracks.length,
  		interpolants = new Array( nTracks );

  	var interpolantSettings = {
  			endingStart: 	ZeroCurvatureEnding,
  			endingEnd:		ZeroCurvatureEnding
  	};

  	for ( var i = 0; i !== nTracks; ++ i ) {

  		var interpolant = tracks[ i ].createInterpolant( null );
  		interpolants[ i ] = interpolant;
  		interpolant.settings = interpolantSettings;

  	}

  	this._interpolantSettings = interpolantSettings;

  	this._interpolants = interpolants;	// bound by the mixer

  	// inside: PropertyMixer (managed by the mixer)
  	this._propertyBindings = new Array( nTracks );

  	this._cacheIndex = null;			// for the memory manager
  	this._byClipCacheIndex = null;		// for the memory manager

  	this._timeScaleInterpolant = null;
  	this._weightInterpolant = null;

  	this.loop = LoopRepeat;
  	this._loopCount = -1;

  	// global mixer time when the action is to be started
  	// it's set back to 'null' upon start of the action
  	this._startTime = null;

  	// scaled local time of the action
  	// gets clamped or wrapped to 0..clip.duration according to loop
  	this.time = 0;

  	this.timeScale = 1;
  	this._effectiveTimeScale = 1;

  	this.weight = 1;
  	this._effectiveWeight = 1;

  	this.repetitions = Infinity; 		// no. of repetitions when looping

  	this.paused = false;				// false -> zero effective time scale
  	this.enabled = true;				// true -> zero effective weight

  	this.clampWhenFinished 	= false;	// keep feeding the last frame?

  	this.zeroSlopeAtStart 	= true;		// for smooth interpolation w/o separate
  	this.zeroSlopeAtEnd		= true;		// clips for start, loop and end

  };

  AnimationAction._new.prototype = {

  	constructor: AnimationAction._new,

  	// State & Scheduling

  	play: function() {

  		this._mixer._activateAction( this );

  		return this;

  	},

  	stop: function() {

  		this._mixer._deactivateAction( this );

  		return this.reset();

  	},

  	reset: function() {

  		this.paused = false;
  		this.enabled = true;

  		this.time = 0;			// restart clip
  		this._loopCount = -1;	// forget previous loops
  		this._startTime = null;	// forget scheduling

  		return this.stopFading().stopWarping();

  	},

  	isRunning: function() {

  		return this.enabled && ! this.paused && this.timeScale !== 0 &&
  				this._startTime === null && this._mixer._isActiveAction( this );

  	},

  	// return true when play has been called
  	isScheduled: function() {

  		return this._mixer._isActiveAction( this );

  	},

  	startAt: function( time ) {

  		this._startTime = time;

  		return this;

  	},

  	setLoop: function( mode, repetitions ) {

  		this.loop = mode;
  		this.repetitions = repetitions;

  		return this;

  	},

  	// Weight

  	// set the weight stopping any scheduled fading
  	// although .enabled = false yields an effective weight of zero, this
  	// method does *not* change .enabled, because it would be confusing
  	setEffectiveWeight: function( weight ) {

  		this.weight = weight;

  		// note: same logic as when updated at runtime
  		this._effectiveWeight = this.enabled ? weight : 0;

  		return this.stopFading();

  	},

  	// return the weight considering fading and .enabled
  	getEffectiveWeight: function() {

  		return this._effectiveWeight;

  	},

  	fadeIn: function( duration ) {

  		return this._scheduleFading( duration, 0, 1 );

  	},

  	fadeOut: function( duration ) {

  		return this._scheduleFading( duration, 1, 0 );

  	},

  	crossFadeFrom: function( fadeOutAction, duration, warp ) {

  		fadeOutAction.fadeOut( duration );
  		this.fadeIn( duration );

  		if( warp ) {

  			var fadeInDuration = this._clip.duration,
  				fadeOutDuration = fadeOutAction._clip.duration,

  				startEndRatio = fadeOutDuration / fadeInDuration,
  				endStartRatio = fadeInDuration / fadeOutDuration;

  			fadeOutAction.warp( 1.0, startEndRatio, duration );
  			this.warp( endStartRatio, 1.0, duration );

  		}

  		return this;

  	},

  	crossFadeTo: function( fadeInAction, duration, warp ) {

  		return fadeInAction.crossFadeFrom( this, duration, warp );

  	},

  	stopFading: function() {

  		var weightInterpolant = this._weightInterpolant;

  		if ( weightInterpolant !== null ) {

  			this._weightInterpolant = null;
  			this._mixer._takeBackControlInterpolant( weightInterpolant );

  		}

  		return this;

  	},

  	// Time Scale Control

  	// set the weight stopping any scheduled warping
  	// although .paused = true yields an effective time scale of zero, this
  	// method does *not* change .paused, because it would be confusing
  	setEffectiveTimeScale: function( timeScale ) {

  		this.timeScale = timeScale;
  		this._effectiveTimeScale = this.paused ? 0 :timeScale;

  		return this.stopWarping();

  	},

  	// return the time scale considering warping and .paused
  	getEffectiveTimeScale: function() {

  		return this._effectiveTimeScale;

  	},

  	setDuration: function( duration ) {

  		this.timeScale = this._clip.duration / duration;

  		return this.stopWarping();

  	},

  	syncWith: function( action ) {

  		this.time = action.time;
  		this.timeScale = action.timeScale;

  		return this.stopWarping();

  	},

  	halt: function( duration ) {

  		return this.warp( this._effectiveTimeScale, 0, duration );

  	},

  	warp: function( startTimeScale, endTimeScale, duration ) {

  		var mixer = this._mixer, now = mixer.time,
  			interpolant = this._timeScaleInterpolant,

  			timeScale = this.timeScale;

  		if ( interpolant === null ) {

  			interpolant = mixer._lendControlInterpolant(),
  			this._timeScaleInterpolant = interpolant;

  		}

  		var times = interpolant.parameterPositions,
  			values = interpolant.sampleValues;

  		times[ 0 ] = now;
  		times[ 1 ] = now + duration;

  		values[ 0 ] = startTimeScale / timeScale;
  		values[ 1 ] = endTimeScale / timeScale;

  		return this;

  	},

  	stopWarping: function() {

  		var timeScaleInterpolant = this._timeScaleInterpolant;

  		if ( timeScaleInterpolant !== null ) {

  			this._timeScaleInterpolant = null;
  			this._mixer._takeBackControlInterpolant( timeScaleInterpolant );

  		}

  		return this;

  	},

  	// Object Accessors

  	getMixer: function() {

  		return this._mixer;

  	},

  	getClip: function() {

  		return this._clip;

  	},

  	getRoot: function() {

  		return this._localRoot || this._mixer._root;

  	},

  	// Interna

  	_update: function( time, deltaTime, timeDirection, accuIndex ) {
  		// called by the mixer

  		var startTime = this._startTime;

  		if ( startTime !== null ) {

  			// check for scheduled start of action

  			var timeRunning = ( time - startTime ) * timeDirection;
  			if ( timeRunning < 0 || timeDirection === 0 ) {

  				return; // yet to come / don't decide when delta = 0

  			}

  			// start

  			this._startTime = null; // unschedule
  			deltaTime = timeDirection * timeRunning;

  		}

  		// apply time scale and advance time

  		deltaTime *= this._updateTimeScale( time );
  		var clipTime = this._updateTime( deltaTime );

  		// note: _updateTime may disable the action resulting in
  		// an effective weight of 0

  		var weight = this._updateWeight( time );

  		if ( weight > 0 ) {

  			var interpolants = this._interpolants;
  			var propertyMixers = this._propertyBindings;

  			for ( var j = 0, m = interpolants.length; j !== m; ++ j ) {

  				interpolants[ j ].evaluate( clipTime );
  				propertyMixers[ j ].accumulate( accuIndex, weight );

  			}

  		}

  	},

  	_updateWeight: function( time ) {

  		var weight = 0;

  		if ( this.enabled ) {

  			weight = this.weight;
  			var interpolant = this._weightInterpolant;

  			if ( interpolant !== null ) {

  				var interpolantValue = interpolant.evaluate( time )[ 0 ];

  				weight *= interpolantValue;

  				if ( time > interpolant.parameterPositions[ 1 ] ) {

  					this.stopFading();

  					if ( interpolantValue === 0 ) {

  						// faded out, disable
  						this.enabled = false;

  					}

  				}

  			}

  		}

  		this._effectiveWeight = weight;
  		return weight;

  	},

  	_updateTimeScale: function( time ) {

  		var timeScale = 0;

  		if ( ! this.paused ) {

  			timeScale = this.timeScale;

  			var interpolant = this._timeScaleInterpolant;

  			if ( interpolant !== null ) {

  				var interpolantValue = interpolant.evaluate( time )[ 0 ];

  				timeScale *= interpolantValue;

  				if ( time > interpolant.parameterPositions[ 1 ] ) {

  					this.stopWarping();

  					if ( timeScale === 0 ) {

  						// motion has halted, pause
  						this.paused = true;

  					} else {

  						// warp done - apply final time scale
  						this.timeScale = timeScale;

  					}

  				}

  			}

  		}

  		this._effectiveTimeScale = timeScale;
  		return timeScale;

  	},

  	_updateTime: function( deltaTime ) {

  		var time = this.time + deltaTime;

  		if ( deltaTime === 0 ) return time;

  		var duration = this._clip.duration,

  			loop = this.loop,
  			loopCount = this._loopCount;

  		if ( loop === LoopOnce ) {

  			if ( loopCount === -1 ) {
  				// just started

  				this.loopCount = 0;
  				this._setEndings( true, true, false );

  			}

  			handle_stop: {

  				if ( time >= duration ) {

  					time = duration;

  				} else if ( time < 0 ) {

  					time = 0;

  				} else break handle_stop;

  				if ( this.clampWhenFinished ) this.paused = true;
  				else this.enabled = false;

  				this._mixer.dispatchEvent( {
  					type: 'finished', action: this,
  					direction: deltaTime < 0 ? -1 : 1
  				} );

  			}

  		} else { // repetitive Repeat or PingPong

  			var pingPong = ( loop === LoopPingPong );

  			if ( loopCount === -1 ) {
  				// just started

  				if ( deltaTime >= 0 ) {

  					loopCount = 0;

  					this._setEndings(
  							true, this.repetitions === 0, pingPong );

  				} else {

  					// when looping in reverse direction, the initial
  					// transition through zero counts as a repetition,
  					// so leave loopCount at -1

  					this._setEndings(
  							this.repetitions === 0, true, pingPong );

  				}

  			}

  			if ( time >= duration || time < 0 ) {
  				// wrap around

  				var loopDelta = Math.floor( time / duration ); // signed
  				time -= duration * loopDelta;

  				loopCount += Math.abs( loopDelta );

  				var pending = this.repetitions - loopCount;

  				if ( pending < 0 ) {
  					// have to stop (switch state, clamp time, fire event)

  					if ( this.clampWhenFinished ) this.paused = true;
  					else this.enabled = false;

  					time = deltaTime > 0 ? duration : 0;

  					this._mixer.dispatchEvent( {
  						type: 'finished', action: this,
  						direction: deltaTime > 0 ? 1 : -1
  					} );

  				} else {
  					// keep running

  					if ( pending === 0 ) {
  						// entering the last round

  						var atStart = deltaTime < 0;
  						this._setEndings( atStart, ! atStart, pingPong );

  					} else {

  						this._setEndings( false, false, pingPong );

  					}

  					this._loopCount = loopCount;

  					this._mixer.dispatchEvent( {
  						type: 'loop', action: this, loopDelta: loopDelta
  					} );

  				}

  			}

  			if ( pingPong && ( loopCount & 1 ) === 1 ) {
  				// invert time for the "pong round"

  				this.time = time;
  				return duration - time;

  			}

  		}

  		this.time = time;
  		return time;

  	},

  	_setEndings: function( atStart, atEnd, pingPong ) {

  		var settings = this._interpolantSettings;

  		if ( pingPong ) {

  			settings.endingStart 	= ZeroSlopeEnding;
  			settings.endingEnd		= ZeroSlopeEnding;

  		} else {

  			// assuming for LoopOnce atStart == atEnd == true

  			if ( atStart ) {

  				settings.endingStart = this.zeroSlopeAtStart ?
  						ZeroSlopeEnding : ZeroCurvatureEnding;

  			} else {

  				settings.endingStart = WrapAroundEnding;

  			}

  			if ( atEnd ) {

  				settings.endingEnd = this.zeroSlopeAtEnd ?
  						ZeroSlopeEnding : ZeroCurvatureEnding;

  			} else {

  				settings.endingEnd 	 = WrapAroundEnding;

  			}

  		}

  	},

  	_scheduleFading: function( duration, weightNow, weightThen ) {

  		var mixer = this._mixer, now = mixer.time,
  			interpolant = this._weightInterpolant;

  		if ( interpolant === null ) {

  			interpolant = mixer._lendControlInterpolant(),
  			this._weightInterpolant = interpolant;

  		}

  		var times = interpolant.parameterPositions,
  			values = interpolant.sampleValues;

  		times[ 0 ] = now; 				values[ 0 ] = weightNow;
  		times[ 1 ] = now + duration;	values[ 1 ] = weightThen;

  		return this;

  	}

  };

  /**
   *
   * Player for AnimationClips.
   *
   *
   * @author Ben Houston / http://clara.io/
   * @author David Sarno / http://lighthaus.us/
   * @author tschw
   */

  function AnimationMixer( root ) {

  	this._root = root;
  	this._initMemoryManager();
  	this._accuIndex = 0;

  	this.time = 0;

  	this.timeScale = 1.0;

  };

  Object.assign( AnimationMixer.prototype, EventDispatcher.prototype, {

  	// return an action for a clip optionally using a custom root target
  	// object (this method allocates a lot of dynamic memory in case a
  	// previously unknown clip/root combination is specified)
  	clipAction: function( clip, optionalRoot ) {

  		var root = optionalRoot || this._root,
  			rootUuid = root.uuid,

  			clipObject = typeof clip === 'string' ?
  					AnimationClip.findByName( root, clip ) : clip,

  			clipUuid = clipObject !== null ? clipObject.uuid : clip,

  			actionsForClip = this._actionsByClip[ clipUuid ],
  			prototypeAction = null;

  		if ( actionsForClip !== undefined ) {

  			var existingAction =
  					actionsForClip.actionByRoot[ rootUuid ];

  			if ( existingAction !== undefined ) {

  				return existingAction;

  			}

  			// we know the clip, so we don't have to parse all
  			// the bindings again but can just copy
  			prototypeAction = actionsForClip.knownActions[ 0 ];

  			// also, take the clip from the prototype action
  			if ( clipObject === null )
  				clipObject = prototypeAction._clip;

  		}

  		// clip must be known when specified via string
  		if ( clipObject === null ) return null;

  		// allocate all resources required to run it
  		var newAction = new AnimationMixer._Action( this, clipObject, optionalRoot );

  		this._bindAction( newAction, prototypeAction );

  		// and make the action known to the memory manager
  		this._addInactiveAction( newAction, clipUuid, rootUuid );

  		return newAction;

  	},

  	// get an existing action
  	existingAction: function( clip, optionalRoot ) {

  		var root = optionalRoot || this._root,
  			rootUuid = root.uuid,

  			clipObject = typeof clip === 'string' ?
  					AnimationClip.findByName( root, clip ) : clip,

  			clipUuid = clipObject ? clipObject.uuid : clip,

  			actionsForClip = this._actionsByClip[ clipUuid ];

  		if ( actionsForClip !== undefined ) {

  			return actionsForClip.actionByRoot[ rootUuid ] || null;

  		}

  		return null;

  	},

  	// deactivates all previously scheduled actions
  	stopAllAction: function() {

  		var actions = this._actions,
  			nActions = this._nActiveActions,
  			bindings = this._bindings,
  			nBindings = this._nActiveBindings;

  		this._nActiveActions = 0;
  		this._nActiveBindings = 0;

  		for ( var i = 0; i !== nActions; ++ i ) {

  			actions[ i ].reset();

  		}

  		for ( var i = 0; i !== nBindings; ++ i ) {

  			bindings[ i ].useCount = 0;

  		}

  		return this;

  	},

  	// advance the time and update apply the animation
  	update: function( deltaTime ) {

  		deltaTime *= this.timeScale;

  		var actions = this._actions,
  			nActions = this._nActiveActions,

  			time = this.time += deltaTime,
  			timeDirection = Math.sign( deltaTime ),

  			accuIndex = this._accuIndex ^= 1;

  		// run active actions

  		for ( var i = 0; i !== nActions; ++ i ) {

  			var action = actions[ i ];

  			if ( action.enabled ) {

  				action._update( time, deltaTime, timeDirection, accuIndex );

  			}

  		}

  		// update scene graph

  		var bindings = this._bindings,
  			nBindings = this._nActiveBindings;

  		for ( var i = 0; i !== nBindings; ++ i ) {

  			bindings[ i ].apply( accuIndex );

  		}

  		return this;

  	},

  	// return this mixer's root target object
  	getRoot: function() {

  		return this._root;

  	},

  	// free all resources specific to a particular clip
  	uncacheClip: function( clip ) {

  		var actions = this._actions,
  			clipUuid = clip.uuid,
  			actionsByClip = this._actionsByClip,
  			actionsForClip = actionsByClip[ clipUuid ];

  		if ( actionsForClip !== undefined ) {

  			// note: just calling _removeInactiveAction would mess up the
  			// iteration state and also require updating the state we can
  			// just throw away

  			var actionsToRemove = actionsForClip.knownActions;

  			for ( var i = 0, n = actionsToRemove.length; i !== n; ++ i ) {

  				var action = actionsToRemove[ i ];

  				this._deactivateAction( action );

  				var cacheIndex = action._cacheIndex,
  					lastInactiveAction = actions[ actions.length - 1 ];

  				action._cacheIndex = null;
  				action._byClipCacheIndex = null;

  				lastInactiveAction._cacheIndex = cacheIndex;
  				actions[ cacheIndex ] = lastInactiveAction;
  				actions.pop();

  				this._removeInactiveBindingsForAction( action );

  			}

  			delete actionsByClip[ clipUuid ];

  		}

  	},

  	// free all resources specific to a particular root target object
  	uncacheRoot: function( root ) {

  		var rootUuid = root.uuid,
  			actionsByClip = this._actionsByClip;

  		for ( var clipUuid in actionsByClip ) {

  			var actionByRoot = actionsByClip[ clipUuid ].actionByRoot,
  				action = actionByRoot[ rootUuid ];

  			if ( action !== undefined ) {

  				this._deactivateAction( action );
  				this._removeInactiveAction( action );

  			}

  		}

  		var bindingsByRoot = this._bindingsByRootAndName,
  			bindingByName = bindingsByRoot[ rootUuid ];

  		if ( bindingByName !== undefined ) {

  			for ( var trackName in bindingByName ) {

  				var binding = bindingByName[ trackName ];
  				binding.restoreOriginalState();
  				this._removeInactiveBinding( binding );

  			}

  		}

  	},

  	// remove a targeted clip from the cache
  	uncacheAction: function( clip, optionalRoot ) {

  		var action = this.existingAction( clip, optionalRoot );

  		if ( action !== null ) {

  			this._deactivateAction( action );
  			this._removeInactiveAction( action );

  		}

  	}

  } );

  AnimationMixer._Action = AnimationAction._new;

  // Implementation details:

  Object.assign( AnimationMixer.prototype, {

  	_bindAction: function( action, prototypeAction ) {

  		var root = action._localRoot || this._root,
  			tracks = action._clip.tracks,
  			nTracks = tracks.length,
  			bindings = action._propertyBindings,
  			interpolants = action._interpolants,
  			rootUuid = root.uuid,
  			bindingsByRoot = this._bindingsByRootAndName,
  			bindingsByName = bindingsByRoot[ rootUuid ];

  		if ( bindingsByName === undefined ) {

  			bindingsByName = {};
  			bindingsByRoot[ rootUuid ] = bindingsByName;

  		}

  		for ( var i = 0; i !== nTracks; ++ i ) {

  			var track = tracks[ i ],
  				trackName = track.name,
  				binding = bindingsByName[ trackName ];

  			if ( binding !== undefined ) {

  				bindings[ i ] = binding;

  			} else {

  				binding = bindings[ i ];

  				if ( binding !== undefined ) {

  					// existing binding, make sure the cache knows

  					if ( binding._cacheIndex === null ) {

  						++ binding.referenceCount;
  						this._addInactiveBinding( binding, rootUuid, trackName );

  					}

  					continue;

  				}

  				var path = prototypeAction && prototypeAction.
  						_propertyBindings[ i ].binding.parsedPath;

  				binding = new PropertyMixer(
  						PropertyBinding.create( root, trackName, path ),
  						track.ValueTypeName, track.getValueSize() );

  				++ binding.referenceCount;
  				this._addInactiveBinding( binding, rootUuid, trackName );

  				bindings[ i ] = binding;

  			}

  			interpolants[ i ].resultBuffer = binding.buffer;

  		}

  	},

  	_activateAction: function( action ) {

  		if ( ! this._isActiveAction( action ) ) {

  			if ( action._cacheIndex === null ) {

  				// this action has been forgotten by the cache, but the user
  				// appears to be still using it -> rebind

  				var rootUuid = ( action._localRoot || this._root ).uuid,
  					clipUuid = action._clip.uuid,
  					actionsForClip = this._actionsByClip[ clipUuid ];

  				this._bindAction( action,
  						actionsForClip && actionsForClip.knownActions[ 0 ] );

  				this._addInactiveAction( action, clipUuid, rootUuid );

  			}

  			var bindings = action._propertyBindings;

  			// increment reference counts / sort out state
  			for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

  				var binding = bindings[ i ];

  				if ( binding.useCount ++ === 0 ) {

  					this._lendBinding( binding );
  					binding.saveOriginalState();

  				}

  			}

  			this._lendAction( action );

  		}

  	},

  	_deactivateAction: function( action ) {

  		if ( this._isActiveAction( action ) ) {

  			var bindings = action._propertyBindings;

  			// decrement reference counts / sort out state
  			for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

  				var binding = bindings[ i ];

  				if ( -- binding.useCount === 0 ) {

  					binding.restoreOriginalState();
  					this._takeBackBinding( binding );

  				}

  			}

  			this._takeBackAction( action );

  		}

  	},

  	// Memory manager

  	_initMemoryManager: function() {

  		this._actions = []; // 'nActiveActions' followed by inactive ones
  		this._nActiveActions = 0;

  		this._actionsByClip = {};
  		// inside:
  		// {
  		// 		knownActions: Array< _Action >	- used as prototypes
  		// 		actionByRoot: _Action			- lookup
  		// }


  		this._bindings = []; // 'nActiveBindings' followed by inactive ones
  		this._nActiveBindings = 0;

  		this._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >


  		this._controlInterpolants = []; // same game as above
  		this._nActiveControlInterpolants = 0;

  		var scope = this;

  		this.stats = {

  			actions: {
  				get total() { return scope._actions.length; },
  				get inUse() { return scope._nActiveActions; }
  			},
  			bindings: {
  				get total() { return scope._bindings.length; },
  				get inUse() { return scope._nActiveBindings; }
  			},
  			controlInterpolants: {
  				get total() { return scope._controlInterpolants.length; },
  				get inUse() { return scope._nActiveControlInterpolants; }
  			}

  		};

  	},

  	// Memory management for _Action objects

  	_isActiveAction: function( action ) {

  		var index = action._cacheIndex;
  		return index !== null && index < this._nActiveActions;

  	},

  	_addInactiveAction: function( action, clipUuid, rootUuid ) {

  		var actions = this._actions,
  			actionsByClip = this._actionsByClip,
  			actionsForClip = actionsByClip[ clipUuid ];

  		if ( actionsForClip === undefined ) {

  			actionsForClip = {

  				knownActions: [ action ],
  				actionByRoot: {}

  			};

  			action._byClipCacheIndex = 0;

  			actionsByClip[ clipUuid ] = actionsForClip;

  		} else {

  			var knownActions = actionsForClip.knownActions;

  			action._byClipCacheIndex = knownActions.length;
  			knownActions.push( action );

  		}

  		action._cacheIndex = actions.length;
  		actions.push( action );

  		actionsForClip.actionByRoot[ rootUuid ] = action;

  	},

  	_removeInactiveAction: function( action ) {

  		var actions = this._actions,
  			lastInactiveAction = actions[ actions.length - 1 ],
  			cacheIndex = action._cacheIndex;

  		lastInactiveAction._cacheIndex = cacheIndex;
  		actions[ cacheIndex ] = lastInactiveAction;
  		actions.pop();

  		action._cacheIndex = null;


  		var clipUuid = action._clip.uuid,
  			actionsByClip = this._actionsByClip,
  			actionsForClip = actionsByClip[ clipUuid ],
  			knownActionsForClip = actionsForClip.knownActions,

  			lastKnownAction =
  				knownActionsForClip[ knownActionsForClip.length - 1 ],

  			byClipCacheIndex = action._byClipCacheIndex;

  		lastKnownAction._byClipCacheIndex = byClipCacheIndex;
  		knownActionsForClip[ byClipCacheIndex ] = lastKnownAction;
  		knownActionsForClip.pop();

  		action._byClipCacheIndex = null;


  		var actionByRoot = actionsForClip.actionByRoot,
  			rootUuid = ( actions._localRoot || this._root ).uuid;

  		delete actionByRoot[ rootUuid ];

  		if ( knownActionsForClip.length === 0 ) {

  			delete actionsByClip[ clipUuid ];

  		}

  		this._removeInactiveBindingsForAction( action );

  	},

  	_removeInactiveBindingsForAction: function( action ) {

  		var bindings = action._propertyBindings;
  		for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

  			var binding = bindings[ i ];

  			if ( -- binding.referenceCount === 0 ) {

  				this._removeInactiveBinding( binding );

  			}

  		}

  	},

  	_lendAction: function( action ) {

  		// [ active actions |  inactive actions  ]
  		// [  active actions >| inactive actions ]
  		//                 s        a
  		//                  <-swap->
  		//                 a        s

  		var actions = this._actions,
  			prevIndex = action._cacheIndex,

  			lastActiveIndex = this._nActiveActions ++,

  			firstInactiveAction = actions[ lastActiveIndex ];

  		action._cacheIndex = lastActiveIndex;
  		actions[ lastActiveIndex ] = action;

  		firstInactiveAction._cacheIndex = prevIndex;
  		actions[ prevIndex ] = firstInactiveAction;

  	},

  	_takeBackAction: function( action ) {

  		// [  active actions  | inactive actions ]
  		// [ active actions |< inactive actions  ]
  		//        a        s
  		//         <-swap->
  		//        s        a

  		var actions = this._actions,
  			prevIndex = action._cacheIndex,

  			firstInactiveIndex = -- this._nActiveActions,

  			lastActiveAction = actions[ firstInactiveIndex ];

  		action._cacheIndex = firstInactiveIndex;
  		actions[ firstInactiveIndex ] = action;

  		lastActiveAction._cacheIndex = prevIndex;
  		actions[ prevIndex ] = lastActiveAction;

  	},

  	// Memory management for PropertyMixer objects

  	_addInactiveBinding: function( binding, rootUuid, trackName ) {

  		var bindingsByRoot = this._bindingsByRootAndName,
  			bindingByName = bindingsByRoot[ rootUuid ],

  			bindings = this._bindings;

  		if ( bindingByName === undefined ) {

  			bindingByName = {};
  			bindingsByRoot[ rootUuid ] = bindingByName;

  		}

  		bindingByName[ trackName ] = binding;

  		binding._cacheIndex = bindings.length;
  		bindings.push( binding );

  	},

  	_removeInactiveBinding: function( binding ) {

  		var bindings = this._bindings,
  			propBinding = binding.binding,
  			rootUuid = propBinding.rootNode.uuid,
  			trackName = propBinding.path,
  			bindingsByRoot = this._bindingsByRootAndName,
  			bindingByName = bindingsByRoot[ rootUuid ],

  			lastInactiveBinding = bindings[ bindings.length - 1 ],
  			cacheIndex = binding._cacheIndex;

  		lastInactiveBinding._cacheIndex = cacheIndex;
  		bindings[ cacheIndex ] = lastInactiveBinding;
  		bindings.pop();

  		delete bindingByName[ trackName ];

  		remove_empty_map: {

  			for ( var _ in bindingByName ) break remove_empty_map;

  			delete bindingsByRoot[ rootUuid ];

  		}

  	},

  	_lendBinding: function( binding ) {

  		var bindings = this._bindings,
  			prevIndex = binding._cacheIndex,

  			lastActiveIndex = this._nActiveBindings ++,

  			firstInactiveBinding = bindings[ lastActiveIndex ];

  		binding._cacheIndex = lastActiveIndex;
  		bindings[ lastActiveIndex ] = binding;

  		firstInactiveBinding._cacheIndex = prevIndex;
  		bindings[ prevIndex ] = firstInactiveBinding;

  	},

  	_takeBackBinding: function( binding ) {

  		var bindings = this._bindings,
  			prevIndex = binding._cacheIndex,

  			firstInactiveIndex = -- this._nActiveBindings,

  			lastActiveBinding = bindings[ firstInactiveIndex ];

  		binding._cacheIndex = firstInactiveIndex;
  		bindings[ firstInactiveIndex ] = binding;

  		lastActiveBinding._cacheIndex = prevIndex;
  		bindings[ prevIndex ] = lastActiveBinding;

  	},


  	// Memory management of Interpolants for weight and time scale

  	_lendControlInterpolant: function() {

  		var interpolants = this._controlInterpolants,
  			lastActiveIndex = this._nActiveControlInterpolants ++,
  			interpolant = interpolants[ lastActiveIndex ];

  		if ( interpolant === undefined ) {

  			interpolant = new LinearInterpolant(
  					new Float32Array( 2 ), new Float32Array( 2 ),
  						1, this._controlInterpolantsResultBuffer );

  			interpolant.__cacheIndex = lastActiveIndex;
  			interpolants[ lastActiveIndex ] = interpolant;

  		}

  		return interpolant;

  	},

  	_takeBackControlInterpolant: function( interpolant ) {

  		var interpolants = this._controlInterpolants,
  			prevIndex = interpolant.__cacheIndex,

  			firstInactiveIndex = -- this._nActiveControlInterpolants,

  			lastActiveInterpolant = interpolants[ firstInactiveIndex ];

  		interpolant.__cacheIndex = firstInactiveIndex;
  		interpolants[ firstInactiveIndex ] = interpolant;

  		lastActiveInterpolant.__cacheIndex = prevIndex;
  		interpolants[ prevIndex ] = lastActiveInterpolant;

  	},

  	_controlInterpolantsResultBuffer: new Float32Array( 1 )

  } );

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function Uniform( value ) {

  	if ( typeof value === 'string' ) {

  		console.warn( 'THREE.Uniform: Type parameter is no longer needed.' );
  		value = arguments[ 1 ];

  	}

  	this.value = value;

  	this.dynamic = false;

  };

  Uniform.prototype = {

  	constructor: Uniform,

  	onUpdate: function ( callback ) {

  		this.dynamic = true;
  		this.onUpdateCallback = callback;

  		return this;

  	}

  };

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   */

  function InstancedBufferGeometry() {

  	BufferGeometry.call( this );

  	this.type = 'InstancedBufferGeometry';
  	this.maxInstancedCount = undefined;

  };

  InstancedBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  InstancedBufferGeometry.prototype.constructor = InstancedBufferGeometry;

  InstancedBufferGeometry.prototype.isBufferGeometry = true;

  InstancedBufferGeometry.prototype.addGroup = function ( start, count, instances ) {

  	this.groups.push( {

  		start: start,
  		count: count,
  		instances: instances

  	} );

  };

  InstancedBufferGeometry.prototype.copy = function ( source ) {

  	var index = source.index;

  	if ( index !== null ) {

  		this.setIndex( index.clone() );

  	}

  	var attributes = source.attributes;

  	for ( var name in attributes ) {

  		var attribute = attributes[ name ];
  		this.addAttribute( name, attribute.clone() );

  	}

  	var groups = source.groups;

  	for ( var i = 0, l = groups.length; i < l; i ++ ) {

  		var group = groups[ i ];
  		this.addGroup( group.start, group.count, group.instances );

  	}

  	return this;

  };

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   */

  function InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, normalized ) {

  	this.uuid = exports.Math.generateUUID();

  	this.data = interleavedBuffer;
  	this.itemSize = itemSize;
  	this.offset = offset;

  	this.normalized = normalized === true;

  };


  InterleavedBufferAttribute.prototype = {

  	constructor: InterleavedBufferAttribute,

  	isInterleavedBufferAttribute: true,

  	get length() {

  		console.warn( 'THREE.BufferAttribute: .length has been deprecated. Please use .count.' );
  		return this.array.length;

  	},

  	get count() {

  		return this.data.count;

  	},

  	get array() {

  		return this.data.array;

  	},

  	setX: function ( index, x ) {

  		this.data.array[ index * this.data.stride + this.offset ] = x;

  		return this;

  	},

  	setY: function ( index, y ) {

  		this.data.array[ index * this.data.stride + this.offset + 1 ] = y;

  		return this;

  	},

  	setZ: function ( index, z ) {

  		this.data.array[ index * this.data.stride + this.offset + 2 ] = z;

  		return this;

  	},

  	setW: function ( index, w ) {

  		this.data.array[ index * this.data.stride + this.offset + 3 ] = w;

  		return this;

  	},

  	getX: function ( index ) {

  		return this.data.array[ index * this.data.stride + this.offset ];

  	},

  	getY: function ( index ) {

  		return this.data.array[ index * this.data.stride + this.offset + 1 ];

  	},

  	getZ: function ( index ) {

  		return this.data.array[ index * this.data.stride + this.offset + 2 ];

  	},

  	getW: function ( index ) {

  		return this.data.array[ index * this.data.stride + this.offset + 3 ];

  	},

  	setXY: function ( index, x, y ) {

  		index = index * this.data.stride + this.offset;

  		this.data.array[ index + 0 ] = x;
  		this.data.array[ index + 1 ] = y;

  		return this;

  	},

  	setXYZ: function ( index, x, y, z ) {

  		index = index * this.data.stride + this.offset;

  		this.data.array[ index + 0 ] = x;
  		this.data.array[ index + 1 ] = y;
  		this.data.array[ index + 2 ] = z;

  		return this;

  	},

  	setXYZW: function ( index, x, y, z, w ) {

  		index = index * this.data.stride + this.offset;

  		this.data.array[ index + 0 ] = x;
  		this.data.array[ index + 1 ] = y;
  		this.data.array[ index + 2 ] = z;
  		this.data.array[ index + 3 ] = w;

  		return this;

  	}

  };

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   */

  function InterleavedBuffer( array, stride ) {

  	this.uuid = exports.Math.generateUUID();

  	this.array = array;
  	this.stride = stride;

  	this.dynamic = false;
  	this.updateRange = { offset: 0, count: - 1 };

  	this.version = 0;

  };

  InterleavedBuffer.prototype = {

  	constructor: InterleavedBuffer,

  	isInterleavedBuffer: true,

  	get length () {

  		return this.array.length;

  	},

  	get count () {

  		return this.array.length / this.stride;

  	},

  	set needsUpdate( value ) {

  		if ( value === true ) this.version ++;

  	},

  	setDynamic: function ( value ) {

  		this.dynamic = value;

  		return this;

  	},

  	copy: function ( source ) {

  		this.array = new source.array.constructor( source.array );
  		this.stride = source.stride;
  		this.dynamic = source.dynamic;

  		return this;

  	},

  	copyAt: function ( index1, attribute, index2 ) {

  		index1 *= this.stride;
  		index2 *= attribute.stride;

  		for ( var i = 0, l = this.stride; i < l; i ++ ) {

  			this.array[ index1 + i ] = attribute.array[ index2 + i ];

  		}

  		return this;

  	},

  	set: function ( value, offset ) {

  		if ( offset === undefined ) offset = 0;

  		this.array.set( value, offset );

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	}

  };

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   */

  function InstancedInterleavedBuffer( array, stride, meshPerAttribute ) {

  	InterleavedBuffer.call( this, array, stride );

  	this.meshPerAttribute = meshPerAttribute || 1;

  };

  InstancedInterleavedBuffer.prototype = Object.create( InterleavedBuffer.prototype );
  InstancedInterleavedBuffer.prototype.constructor = InstancedInterleavedBuffer;

  InstancedInterleavedBuffer.prototype.isInstancedInterleavedBuffer = true;

  InstancedInterleavedBuffer.prototype.copy = function ( source ) {

  	InterleavedBuffer.prototype.copy.call( this, source );

  	this.meshPerAttribute = source.meshPerAttribute;

  	return this;

  };

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   */

  function InstancedBufferAttribute( array, itemSize, meshPerAttribute ) {

  	BufferAttribute.call( this, array, itemSize );

  	this.meshPerAttribute = meshPerAttribute || 1;

  };

  InstancedBufferAttribute.prototype = Object.create( BufferAttribute.prototype );
  InstancedBufferAttribute.prototype.constructor = InstancedBufferAttribute;

  InstancedBufferAttribute.prototype.isInstancedBufferAttribute = true;

  InstancedBufferAttribute.prototype.copy = function ( source ) {

  	BufferAttribute.prototype.copy.call( this, source );

  	this.meshPerAttribute = source.meshPerAttribute;

  	return this;

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author bhouston / http://clara.io/
   * @author stephomi / http://stephaneginier.com/
   */

  function Raycaster( origin, direction, near, far ) {

  	this.ray = new Ray( origin, direction );
  	// direction is assumed to be normalized (for accurate distance calculations)

  	this.near = near || 0;
  	this.far = far || Infinity;

  	this.params = {
  		Mesh: {},
  		Line: {},
  		LOD: {},
  		Points: { threshold: 1 },
  		Sprite: {}
  	};

  	Object.defineProperties( this.params, {
  		PointCloud: {
  			get: function () {
  				console.warn( 'THREE.Raycaster: params.PointCloud has been renamed to params.Points.' );
  				return this.Points;
  			}
  		}
  	} );

  };

  function ascSort( a, b ) {

  	return a.distance - b.distance;

  }

  function intersectObject( object, raycaster, intersects, recursive ) {

  	if ( object.visible === false ) return;

  	object.raycast( raycaster, intersects );

  	if ( recursive === true ) {

  		var children = object.children;

  		for ( var i = 0, l = children.length; i < l; i ++ ) {

  			intersectObject( children[ i ], raycaster, intersects, true );

  		}

  	}

  }

  //

  Raycaster.prototype = {

  	constructor: Raycaster,

  	linePrecision: 1,

  	set: function ( origin, direction ) {

  		// direction is assumed to be normalized (for accurate distance calculations)

  		this.ray.set( origin, direction );

  	},

  	setFromCamera: function ( coords, camera ) {

  		if ( (camera && camera.isPerspectiveCamera) ) {

  			this.ray.origin.setFromMatrixPosition( camera.matrixWorld );
  			this.ray.direction.set( coords.x, coords.y, 0.5 ).unproject( camera ).sub( this.ray.origin ).normalize();

  		} else if ( (camera && camera.isOrthographicCamera) ) {

  			this.ray.origin.set( coords.x, coords.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ).unproject( camera ); // set origin in plane of camera
  			this.ray.direction.set( 0, 0, - 1 ).transformDirection( camera.matrixWorld );

  		} else {

  			console.error( 'THREE.Raycaster: Unsupported camera type.' );

  		}

  	},

  	intersectObject: function ( object, recursive ) {

  		var intersects = [];

  		intersectObject( object, this, intersects, recursive );

  		intersects.sort( ascSort );

  		return intersects;

  	},

  	intersectObjects: function ( objects, recursive ) {

  		var intersects = [];

  		if ( Array.isArray( objects ) === false ) {

  			console.warn( 'THREE.Raycaster.intersectObjects: objects is not an Array.' );
  			return intersects;

  		}

  		for ( var i = 0, l = objects.length; i < l; i ++ ) {

  			intersectObject( objects[ i ], this, intersects, recursive );

  		}

  		intersects.sort( ascSort );

  		return intersects;

  	}

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function Clock( autoStart ) {

  	this.autoStart = ( autoStart !== undefined ) ? autoStart : true;

  	this.startTime = 0;
  	this.oldTime = 0;
  	this.elapsedTime = 0;

  	this.running = false;

  };

  Clock.prototype = {

  	constructor: Clock,

  	start: function () {

  		this.startTime = ( performance || Date ).now();

  		this.oldTime = this.startTime;
  		this.running = true;

  	},

  	stop: function () {

  		this.getElapsedTime();
  		this.running = false;

  	},

  	getElapsedTime: function () {

  		this.getDelta();
  		return this.elapsedTime;

  	},

  	getDelta: function () {

  		var diff = 0;

  		if ( this.autoStart && ! this.running ) {

  			this.start();

  		}

  		if ( this.running ) {

  			var newTime = ( performance || Date ).now();

  			diff = ( newTime - this.oldTime ) / 1000;
  			this.oldTime = newTime;

  			this.elapsedTime += diff;

  		}

  		return diff;

  	}

  };

  /**
   * Spline from Tween.js, slightly optimized (and trashed)
   * http://sole.github.com/tween.js/examples/05_spline.html
   *
   * @author mrdoob / http://mrdoob.com/
   * @author alteredq / http://alteredqualia.com/
   */

  function Spline( points ) {

  	this.points = points;

  	var c = [], v3 = { x: 0, y: 0, z: 0 },
  	point, intPoint, weight, w2, w3,
  	pa, pb, pc, pd;

  	this.initFromArray = function ( a ) {

  		this.points = [];

  		for ( var i = 0; i < a.length; i ++ ) {

  			this.points[ i ] = { x: a[ i ][ 0 ], y: a[ i ][ 1 ], z: a[ i ][ 2 ] };

  		}

  	};

  	this.getPoint = function ( k ) {

  		point = ( this.points.length - 1 ) * k;
  		intPoint = Math.floor( point );
  		weight = point - intPoint;

  		c[ 0 ] = intPoint === 0 ? intPoint : intPoint - 1;
  		c[ 1 ] = intPoint;
  		c[ 2 ] = intPoint  > this.points.length - 2 ? this.points.length - 1 : intPoint + 1;
  		c[ 3 ] = intPoint  > this.points.length - 3 ? this.points.length - 1 : intPoint + 2;

  		pa = this.points[ c[ 0 ] ];
  		pb = this.points[ c[ 1 ] ];
  		pc = this.points[ c[ 2 ] ];
  		pd = this.points[ c[ 3 ] ];

  		w2 = weight * weight;
  		w3 = weight * w2;

  		v3.x = interpolate( pa.x, pb.x, pc.x, pd.x, weight, w2, w3 );
  		v3.y = interpolate( pa.y, pb.y, pc.y, pd.y, weight, w2, w3 );
  		v3.z = interpolate( pa.z, pb.z, pc.z, pd.z, weight, w2, w3 );

  		return v3;

  	};

  	this.getControlPointsArray = function () {

  		var i, p, l = this.points.length,
  			coords = [];

  		for ( i = 0; i < l; i ++ ) {

  			p = this.points[ i ];
  			coords[ i ] = [ p.x, p.y, p.z ];

  		}

  		return coords;

  	};

  	// approximate length by summing linear segments

  	this.getLength = function ( nSubDivisions ) {

  		var i, index, nSamples, position,
  			point = 0, intPoint = 0, oldIntPoint = 0,
  			oldPosition = new Vector3(),
  			tmpVec = new Vector3(),
  			chunkLengths = [],
  			totalLength = 0;

  		// first point has 0 length

  		chunkLengths[ 0 ] = 0;

  		if ( ! nSubDivisions ) nSubDivisions = 100;

  		nSamples = this.points.length * nSubDivisions;

  		oldPosition.copy( this.points[ 0 ] );

  		for ( i = 1; i < nSamples; i ++ ) {

  			index = i / nSamples;

  			position = this.getPoint( index );
  			tmpVec.copy( position );

  			totalLength += tmpVec.distanceTo( oldPosition );

  			oldPosition.copy( position );

  			point = ( this.points.length - 1 ) * index;
  			intPoint = Math.floor( point );

  			if ( intPoint !== oldIntPoint ) {

  				chunkLengths[ intPoint ] = totalLength;
  				oldIntPoint = intPoint;

  			}

  		}

  		// last point ends with total length

  		chunkLengths[ chunkLengths.length ] = totalLength;

  		return { chunks: chunkLengths, total: totalLength };

  	};

  	this.reparametrizeByArcLength = function ( samplingCoef ) {

  		var i, j,
  			index, indexCurrent, indexNext,
  			realDistance,
  			sampling, position,
  			newpoints = [],
  			tmpVec = new Vector3(),
  			sl = this.getLength();

  		newpoints.push( tmpVec.copy( this.points[ 0 ] ).clone() );

  		for ( i = 1; i < this.points.length; i ++ ) {

  			//tmpVec.copy( this.points[ i - 1 ] );
  			//linearDistance = tmpVec.distanceTo( this.points[ i ] );

  			realDistance = sl.chunks[ i ] - sl.chunks[ i - 1 ];

  			sampling = Math.ceil( samplingCoef * realDistance / sl.total );

  			indexCurrent = ( i - 1 ) / ( this.points.length - 1 );
  			indexNext = i / ( this.points.length - 1 );

  			for ( j = 1; j < sampling - 1; j ++ ) {

  				index = indexCurrent + j * ( 1 / sampling ) * ( indexNext - indexCurrent );

  				position = this.getPoint( index );
  				newpoints.push( tmpVec.copy( position ).clone() );

  			}

  			newpoints.push( tmpVec.copy( this.points[ i ] ).clone() );

  		}

  		this.points = newpoints;

  	};

  	// Catmull-Rom

  	function interpolate( p0, p1, p2, p3, t, t2, t3 ) {

  		var v0 = ( p2 - p0 ) * 0.5,
  			v1 = ( p3 - p1 ) * 0.5;

  		return ( 2 * ( p1 - p2 ) + v0 + v1 ) * t3 + ( - 3 * ( p1 - p2 ) - 2 * v0 - v1 ) * t2 + v0 * t + p1;

  	}

  };

  /**
   * @author bhouston / http://clara.io
   * @author WestLangley / http://github.com/WestLangley
   *
   * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
   *
   * The poles (phi) are at the positive and negative y axis.
   * The equator starts at positive z.
   */

  function Spherical( radius, phi, theta ) {

  	this.radius = ( radius !== undefined ) ? radius : 1.0;
  	this.phi = ( phi !== undefined ) ? phi : 0; // up / down towards top and bottom pole
  	this.theta = ( theta !== undefined ) ? theta : 0; // around the equator of the sphere

  	return this;

  };

  Spherical.prototype = {

  	constructor: Spherical,

  	set: function ( radius, phi, theta ) {

  		this.radius = radius;
  		this.phi = phi;
  		this.theta = theta;

  		return this;

  	},

  	clone: function () {

  		return new this.constructor().copy( this );

  	},

  	copy: function ( other ) {

  		this.radius.copy( other.radius );
  		this.phi.copy( other.phi );
  		this.theta.copy( other.theta );

  		return this;

  	},

  	// restrict phi to be betwee EPS and PI-EPS
  	makeSafe: function() {

  		var EPS = 0.000001;
  		this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );

  		return this;

  	},

  	setFromVector3: function( vec3 ) {

  		this.radius = vec3.length();

  		if ( this.radius === 0 ) {

  			this.theta = 0;
  			this.phi = 0;

  		} else {

  			this.theta = Math.atan2( vec3.x, vec3.z ); // equator angle around y-up axis
  			this.phi = Math.acos( exports.Math.clamp( vec3.y / this.radius, - 1, 1 ) ); // polar angle

  		}

  		return this;

  	},

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function MorphBlendMesh( geometry, material ) {

  	Mesh.call( this, geometry, material );

  	this.animationsMap = {};
  	this.animationsList = [];

  	// prepare default animation
  	// (all frames played together in 1 second)

  	var numFrames = this.geometry.morphTargets.length;

  	var name = "__default";

  	var startFrame = 0;
  	var endFrame = numFrames - 1;

  	var fps = numFrames / 1;

  	this.createAnimation( name, startFrame, endFrame, fps );
  	this.setAnimationWeight( name, 1 );

  };

  MorphBlendMesh.prototype = Object.create( Mesh.prototype );
  MorphBlendMesh.prototype.constructor = MorphBlendMesh;

  MorphBlendMesh.prototype.createAnimation = function ( name, start, end, fps ) {

  	var animation = {

  		start: start,
  		end: end,

  		length: end - start + 1,

  		fps: fps,
  		duration: ( end - start ) / fps,

  		lastFrame: 0,
  		currentFrame: 0,

  		active: false,

  		time: 0,
  		direction: 1,
  		weight: 1,

  		directionBackwards: false,
  		mirroredLoop: false

  	};

  	this.animationsMap[ name ] = animation;
  	this.animationsList.push( animation );

  };

  MorphBlendMesh.prototype.autoCreateAnimations = function ( fps ) {

  	var pattern = /([a-z]+)_?(\d+)/i;

  	var firstAnimation, frameRanges = {};

  	var geometry = this.geometry;

  	for ( var i = 0, il = geometry.morphTargets.length; i < il; i ++ ) {

  		var morph = geometry.morphTargets[ i ];
  		var chunks = morph.name.match( pattern );

  		if ( chunks && chunks.length > 1 ) {

  			var name = chunks[ 1 ];

  			if ( ! frameRanges[ name ] ) frameRanges[ name ] = { start: Infinity, end: - Infinity };

  			var range = frameRanges[ name ];

  			if ( i < range.start ) range.start = i;
  			if ( i > range.end ) range.end = i;

  			if ( ! firstAnimation ) firstAnimation = name;

  		}

  	}

  	for ( var name in frameRanges ) {

  		var range = frameRanges[ name ];
  		this.createAnimation( name, range.start, range.end, fps );

  	}

  	this.firstAnimation = firstAnimation;

  };

  MorphBlendMesh.prototype.setAnimationDirectionForward = function ( name ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.direction = 1;
  		animation.directionBackwards = false;

  	}

  };

  MorphBlendMesh.prototype.setAnimationDirectionBackward = function ( name ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.direction = - 1;
  		animation.directionBackwards = true;

  	}

  };

  MorphBlendMesh.prototype.setAnimationFPS = function ( name, fps ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.fps = fps;
  		animation.duration = ( animation.end - animation.start ) / animation.fps;

  	}

  };

  MorphBlendMesh.prototype.setAnimationDuration = function ( name, duration ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.duration = duration;
  		animation.fps = ( animation.end - animation.start ) / animation.duration;

  	}

  };

  MorphBlendMesh.prototype.setAnimationWeight = function ( name, weight ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.weight = weight;

  	}

  };

  MorphBlendMesh.prototype.setAnimationTime = function ( name, time ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.time = time;

  	}

  };

  MorphBlendMesh.prototype.getAnimationTime = function ( name ) {

  	var time = 0;

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		time = animation.time;

  	}

  	return time;

  };

  MorphBlendMesh.prototype.getAnimationDuration = function ( name ) {

  	var duration = - 1;

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		duration = animation.duration;

  	}

  	return duration;

  };

  MorphBlendMesh.prototype.playAnimation = function ( name ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.time = 0;
  		animation.active = true;

  	} else {

  		console.warn( "THREE.MorphBlendMesh: animation[" + name + "] undefined in .playAnimation()" );

  	}

  };

  MorphBlendMesh.prototype.stopAnimation = function ( name ) {

  	var animation = this.animationsMap[ name ];

  	if ( animation ) {

  		animation.active = false;

  	}

  };

  MorphBlendMesh.prototype.update = function ( delta ) {

  	for ( var i = 0, il = this.animationsList.length; i < il; i ++ ) {

  		var animation = this.animationsList[ i ];

  		if ( ! animation.active ) continue;

  		var frameTime = animation.duration / animation.length;

  		animation.time += animation.direction * delta;

  		if ( animation.mirroredLoop ) {

  			if ( animation.time > animation.duration || animation.time < 0 ) {

  				animation.direction *= - 1;

  				if ( animation.time > animation.duration ) {

  					animation.time = animation.duration;
  					animation.directionBackwards = true;

  				}

  				if ( animation.time < 0 ) {

  					animation.time = 0;
  					animation.directionBackwards = false;

  				}

  			}

  		} else {

  			animation.time = animation.time % animation.duration;

  			if ( animation.time < 0 ) animation.time += animation.duration;

  		}

  		var keyframe = animation.start + exports.Math.clamp( Math.floor( animation.time / frameTime ), 0, animation.length - 1 );
  		var weight = animation.weight;

  		if ( keyframe !== animation.currentFrame ) {

  			this.morphTargetInfluences[ animation.lastFrame ] = 0;
  			this.morphTargetInfluences[ animation.currentFrame ] = 1 * weight;

  			this.morphTargetInfluences[ keyframe ] = 0;

  			animation.lastFrame = animation.currentFrame;
  			animation.currentFrame = keyframe;

  		}

  		var mix = ( animation.time % frameTime ) / frameTime;

  		if ( animation.directionBackwards ) mix = 1 - mix;

  		if ( animation.currentFrame !== animation.lastFrame ) {

  			this.morphTargetInfluences[ animation.currentFrame ] = mix * weight;
  			this.morphTargetInfluences[ animation.lastFrame ] = ( 1 - mix ) * weight;

  		} else {

  			this.morphTargetInfluences[ animation.currentFrame ] = weight;

  		}

  	}

  };

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  function ImmediateRenderObject( material ) {

  	Object3D.call( this );

  	this.material = material;
  	this.render = function ( renderCallback ) {};

  };

  ImmediateRenderObject.prototype = Object.create( Object3D.prototype );
  ImmediateRenderObject.prototype.constructor = ImmediateRenderObject;

  ImmediateRenderObject.prototype.isImmediateRenderObject = true;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function WireframeGeometry( geometry ) {

  	BufferGeometry.call( this );

  	var edge = [ 0, 0 ], hash = {};

  	function sortFunction( a, b ) {

  		return a - b;

  	}

  	var keys = [ 'a', 'b', 'c' ];

  	if ( (geometry && geometry.isGeometry) ) {

  		var vertices = geometry.vertices;
  		var faces = geometry.faces;
  		var numEdges = 0;

  		// allocate maximal size
  		var edges = new Uint32Array( 6 * faces.length );

  		for ( var i = 0, l = faces.length; i < l; i ++ ) {

  			var face = faces[ i ];

  			for ( var j = 0; j < 3; j ++ ) {

  				edge[ 0 ] = face[ keys[ j ] ];
  				edge[ 1 ] = face[ keys[ ( j + 1 ) % 3 ] ];
  				edge.sort( sortFunction );

  				var key = edge.toString();

  				if ( hash[ key ] === undefined ) {

  					edges[ 2 * numEdges ] = edge[ 0 ];
  					edges[ 2 * numEdges + 1 ] = edge[ 1 ];
  					hash[ key ] = true;
  					numEdges ++;

  				}

  			}

  		}

  		var coords = new Float32Array( numEdges * 2 * 3 );

  		for ( var i = 0, l = numEdges; i < l; i ++ ) {

  			for ( var j = 0; j < 2; j ++ ) {

  				var vertex = vertices[ edges [ 2 * i + j ] ];

  				var index = 6 * i + 3 * j;
  				coords[ index + 0 ] = vertex.x;
  				coords[ index + 1 ] = vertex.y;
  				coords[ index + 2 ] = vertex.z;

  			}

  		}

  		this.addAttribute( 'position', new BufferAttribute( coords, 3 ) );

  	} else if ( (geometry && geometry.isBufferGeometry) ) {

  		if ( geometry.index !== null ) {

  			// Indexed BufferGeometry

  			var indices = geometry.index.array;
  			var vertices = geometry.attributes.position;
  			var groups = geometry.groups;
  			var numEdges = 0;

  			if ( groups.length === 0 ) {

  				geometry.addGroup( 0, indices.length );

  			}

  			// allocate maximal size
  			var edges = new Uint32Array( 2 * indices.length );

  			for ( var o = 0, ol = groups.length; o < ol; ++ o ) {

  				var group = groups[ o ];

  				var start = group.start;
  				var count = group.count;

  				for ( var i = start, il = start + count; i < il; i += 3 ) {

  					for ( var j = 0; j < 3; j ++ ) {

  						edge[ 0 ] = indices[ i + j ];
  						edge[ 1 ] = indices[ i + ( j + 1 ) % 3 ];
  						edge.sort( sortFunction );

  						var key = edge.toString();

  						if ( hash[ key ] === undefined ) {

  							edges[ 2 * numEdges ] = edge[ 0 ];
  							edges[ 2 * numEdges + 1 ] = edge[ 1 ];
  							hash[ key ] = true;
  							numEdges ++;

  						}

  					}

  				}

  			}

  			var coords = new Float32Array( numEdges * 2 * 3 );

  			for ( var i = 0, l = numEdges; i < l; i ++ ) {

  				for ( var j = 0; j < 2; j ++ ) {

  					var index = 6 * i + 3 * j;
  					var index2 = edges[ 2 * i + j ];

  					coords[ index + 0 ] = vertices.getX( index2 );
  					coords[ index + 1 ] = vertices.getY( index2 );
  					coords[ index + 2 ] = vertices.getZ( index2 );

  				}

  			}

  			this.addAttribute( 'position', new BufferAttribute( coords, 3 ) );

  		} else {

  			// non-indexed BufferGeometry

  			var vertices = geometry.attributes.position.array;
  			var numEdges = vertices.length / 3;
  			var numTris = numEdges / 3;

  			var coords = new Float32Array( numEdges * 2 * 3 );

  			for ( var i = 0, l = numTris; i < l; i ++ ) {

  				for ( var j = 0; j < 3; j ++ ) {

  					var index = 18 * i + 6 * j;

  					var index1 = 9 * i + 3 * j;
  					coords[ index + 0 ] = vertices[ index1 ];
  					coords[ index + 1 ] = vertices[ index1 + 1 ];
  					coords[ index + 2 ] = vertices[ index1 + 2 ];

  					var index2 = 9 * i + 3 * ( ( j + 1 ) % 3 );
  					coords[ index + 3 ] = vertices[ index2 ];
  					coords[ index + 4 ] = vertices[ index2 + 1 ];
  					coords[ index + 5 ] = vertices[ index2 + 2 ];

  				}

  			}

  			this.addAttribute( 'position', new BufferAttribute( coords, 3 ) );

  		}

  	}

  };

  WireframeGeometry.prototype = Object.create( BufferGeometry.prototype );
  WireframeGeometry.prototype.constructor = WireframeGeometry;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function WireframeHelper( object, hex ) {

  	var color = ( hex !== undefined ) ? hex : 0xffffff;

  	LineSegments.call( this, new WireframeGeometry( object.geometry ), new LineBasicMaterial( { color: color } ) );

  	this.matrix = object.matrixWorld;
  	this.matrixAutoUpdate = false;

  };

  WireframeHelper.prototype = Object.create( LineSegments.prototype );
  WireframeHelper.prototype.constructor = WireframeHelper;

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author WestLangley / http://github.com/WestLangley
  */

  function VertexNormalsHelper( object, size, hex, linewidth ) {

  	this.object = object;

  	this.size = ( size !== undefined ) ? size : 1;

  	var color = ( hex !== undefined ) ? hex : 0xff0000;

  	var width = ( linewidth !== undefined ) ? linewidth : 1;

  	//

  	var nNormals = 0;

  	var objGeometry = this.object.geometry;

  	if ( (objGeometry && objGeometry.isGeometry) ) {

  		nNormals = objGeometry.faces.length * 3;

  	} else if ( (objGeometry && objGeometry.isBufferGeometry) ) {

  		nNormals = objGeometry.attributes.normal.count;

  	}

  	//

  	var geometry = new BufferGeometry();

  	var positions = new Float32Attribute( nNormals * 2 * 3, 3 );

  	geometry.addAttribute( 'position', positions );

  	LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, linewidth: width } ) );

  	//

  	this.matrixAutoUpdate = false;

  	this.update();

  };

  VertexNormalsHelper.prototype = Object.create( LineSegments.prototype );
  VertexNormalsHelper.prototype.constructor = VertexNormalsHelper;

  VertexNormalsHelper.prototype.update = ( function () {

  	var v1 = new Vector3();
  	var v2 = new Vector3();
  	var normalMatrix = new Matrix3();

  	return function update() {

  		var keys = [ 'a', 'b', 'c' ];

  		this.object.updateMatrixWorld( true );

  		normalMatrix.getNormalMatrix( this.object.matrixWorld );

  		var matrixWorld = this.object.matrixWorld;

  		var position = this.geometry.attributes.position;

  		//

  		var objGeometry = this.object.geometry;

  		if ( (objGeometry && objGeometry.isGeometry) ) {

  			var vertices = objGeometry.vertices;

  			var faces = objGeometry.faces;

  			var idx = 0;

  			for ( var i = 0, l = faces.length; i < l; i ++ ) {

  				var face = faces[ i ];

  				for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {

  					var vertex = vertices[ face[ keys[ j ] ] ];

  					var normal = face.vertexNormals[ j ];

  					v1.copy( vertex ).applyMatrix4( matrixWorld );

  					v2.copy( normal ).applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );

  					position.setXYZ( idx, v1.x, v1.y, v1.z );

  					idx = idx + 1;

  					position.setXYZ( idx, v2.x, v2.y, v2.z );

  					idx = idx + 1;

  				}

  			}

  		} else if ( (objGeometry && objGeometry.isBufferGeometry) ) {

  			var objPos = objGeometry.attributes.position;

  			var objNorm = objGeometry.attributes.normal;

  			var idx = 0;

  			// for simplicity, ignore index and drawcalls, and render every normal

  			for ( var j = 0, jl = objPos.count; j < jl; j ++ ) {

  				v1.set( objPos.getX( j ), objPos.getY( j ), objPos.getZ( j ) ).applyMatrix4( matrixWorld );

  				v2.set( objNorm.getX( j ), objNorm.getY( j ), objNorm.getZ( j ) );

  				v2.applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );

  				position.setXYZ( idx, v1.x, v1.y, v1.z );

  				idx = idx + 1;

  				position.setXYZ( idx, v2.x, v2.y, v2.z );

  				idx = idx + 1;

  			}

  		}

  		position.needsUpdate = true;

  		return this;

  	};

  }() );

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   * @author WestLangley / http://github.com/WestLangley
  */

  function SpotLightHelper( light ) {

  	Object3D.call( this );

  	this.light = light;
  	this.light.updateMatrixWorld();

  	this.matrix = light.matrixWorld;
  	this.matrixAutoUpdate = false;

  	var geometry = new BufferGeometry();

  	var positions = [
  		0, 0, 0,   0,   0,   1,
  		0, 0, 0,   1,   0,   1,
  		0, 0, 0, - 1,   0,   1,
  		0, 0, 0,   0,   1,   1,
  		0, 0, 0,   0, - 1,   1
  	];

  	for ( var i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {

  		var p1 = ( i / l ) * Math.PI * 2;
  		var p2 = ( j / l ) * Math.PI * 2;

  		positions.push(
  			Math.cos( p1 ), Math.sin( p1 ), 1,
  			Math.cos( p2 ), Math.sin( p2 ), 1
  		);

  	}

  	geometry.addAttribute( 'position', new Float32Attribute( positions, 3 ) );

  	var material = new LineBasicMaterial( { fog: false } );

  	this.cone = new LineSegments( geometry, material );
  	this.add( this.cone );

  	this.update();

  };

  SpotLightHelper.prototype = Object.create( Object3D.prototype );
  SpotLightHelper.prototype.constructor = SpotLightHelper;

  SpotLightHelper.prototype.dispose = function () {

  	this.cone.geometry.dispose();
  	this.cone.material.dispose();

  };

  SpotLightHelper.prototype.update = function () {

  	var vector = new Vector3();
  	var vector2 = new Vector3();

  	return function update() {

  		var coneLength = this.light.distance ? this.light.distance : 1000;
  		var coneWidth = coneLength * Math.tan( this.light.angle );

  		this.cone.scale.set( coneWidth, coneWidth, coneLength );

  		vector.setFromMatrixPosition( this.light.matrixWorld );
  		vector2.setFromMatrixPosition( this.light.target.matrixWorld );

  		this.cone.lookAt( vector2.sub( vector ) );

  		this.cone.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );

  	};

  }();

  /**
   * @author Sean Griffin / http://twitter.com/sgrif
   * @author Michael Guerrero / http://realitymeltdown.com
   * @author mrdoob / http://mrdoob.com/
   * @author ikerr / http://verold.com
   */

  function SkeletonHelper( object ) {

  	this.bones = this.getBoneList( object );

  	var geometry = new Geometry();

  	for ( var i = 0; i < this.bones.length; i ++ ) {

  		var bone = this.bones[ i ];

  		if ( (bone.parent && bone.parent.isBone) ) {

  			geometry.vertices.push( new Vector3() );
  			geometry.vertices.push( new Vector3() );
  			geometry.colors.push( new Color( 0, 0, 1 ) );
  			geometry.colors.push( new Color( 0, 1, 0 ) );

  		}

  	}

  	geometry.dynamic = true;

  	var material = new LineBasicMaterial( { vertexColors: VertexColors, depthTest: false, depthWrite: false, transparent: true } );

  	LineSegments.call( this, geometry, material );

  	this.root = object;

  	this.matrix = object.matrixWorld;
  	this.matrixAutoUpdate = false;

  	this.update();

  };


  SkeletonHelper.prototype = Object.create( LineSegments.prototype );
  SkeletonHelper.prototype.constructor = SkeletonHelper;

  SkeletonHelper.prototype.getBoneList = function( object ) {

  	var boneList = [];

  	if ( (object && object.isBone) ) {

  		boneList.push( object );

  	}

  	for ( var i = 0; i < object.children.length; i ++ ) {

  		boneList.push.apply( boneList, this.getBoneList( object.children[ i ] ) );

  	}

  	return boneList;

  };

  SkeletonHelper.prototype.update = function () {

  	var geometry = this.geometry;

  	var matrixWorldInv = new Matrix4().getInverse( this.root.matrixWorld );

  	var boneMatrix = new Matrix4();

  	var j = 0;

  	for ( var i = 0; i < this.bones.length; i ++ ) {

  		var bone = this.bones[ i ];

  		if ( (bone.parent && bone.parent.isBone) ) {

  			boneMatrix.multiplyMatrices( matrixWorldInv, bone.matrixWorld );
  			geometry.vertices[ j ].setFromMatrixPosition( boneMatrix );

  			boneMatrix.multiplyMatrices( matrixWorldInv, bone.parent.matrixWorld );
  			geometry.vertices[ j + 1 ].setFromMatrixPosition( boneMatrix );

  			j += 2;

  		}

  	}

  	geometry.verticesNeedUpdate = true;

  	geometry.computeBoundingSphere();

  };

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   * based on THREE.SphereGeometry
   */

  function SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

  	BufferGeometry.call( this );

  	this.type = 'SphereBufferGeometry';

  	this.parameters = {
  		radius: radius,
  		widthSegments: widthSegments,
  		heightSegments: heightSegments,
  		phiStart: phiStart,
  		phiLength: phiLength,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	radius = radius || 50;

  	widthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );
  	heightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );

  	phiStart = phiStart !== undefined ? phiStart : 0;
  	phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;

  	thetaStart = thetaStart !== undefined ? thetaStart : 0;
  	thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;

  	var thetaEnd = thetaStart + thetaLength;

  	var vertexCount = ( ( widthSegments + 1 ) * ( heightSegments + 1 ) );

  	var positions = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var normals = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var uvs = new BufferAttribute( new Float32Array( vertexCount * 2 ), 2 );

  	var index = 0, vertices = [], normal = new Vector3();

  	for ( var y = 0; y <= heightSegments; y ++ ) {

  		var verticesRow = [];

  		var v = y / heightSegments;

  		for ( var x = 0; x <= widthSegments; x ++ ) {

  			var u = x / widthSegments;

  			var px = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
  			var py = radius * Math.cos( thetaStart + v * thetaLength );
  			var pz = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );

  			normal.set( px, py, pz ).normalize();

  			positions.setXYZ( index, px, py, pz );
  			normals.setXYZ( index, normal.x, normal.y, normal.z );
  			uvs.setXY( index, u, 1 - v );

  			verticesRow.push( index );

  			index ++;

  		}

  		vertices.push( verticesRow );

  	}

  	var indices = [];

  	for ( var y = 0; y < heightSegments; y ++ ) {

  		for ( var x = 0; x < widthSegments; x ++ ) {

  			var v1 = vertices[ y ][ x + 1 ];
  			var v2 = vertices[ y ][ x ];
  			var v3 = vertices[ y + 1 ][ x ];
  			var v4 = vertices[ y + 1 ][ x + 1 ];

  			if ( y !== 0 || thetaStart > 0 ) indices.push( v1, v2, v4 );
  			if ( y !== heightSegments - 1 || thetaEnd < Math.PI ) indices.push( v2, v3, v4 );

  		}

  	}

  	this.setIndex( new ( positions.count > 65535 ? Uint32Attribute : Uint16Attribute )( indices, 1 ) );
  	this.addAttribute( 'position', positions );
  	this.addAttribute( 'normal', normals );
  	this.addAttribute( 'uv', uvs );

  	this.boundingSphere = new Sphere( new Vector3(), radius );

  };

  SphereBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  SphereBufferGeometry.prototype.constructor = SphereBufferGeometry;

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   */

  function PointLightHelper( light, sphereSize ) {

  	this.light = light;
  	this.light.updateMatrixWorld();

  	var geometry = new SphereBufferGeometry( sphereSize, 4, 2 );
  	var material = new MeshBasicMaterial( { wireframe: true, fog: false } );
  	material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );

  	Mesh.call( this, geometry, material );

  	this.matrix = this.light.matrixWorld;
  	this.matrixAutoUpdate = false;

  	/*
  	var distanceGeometry = new THREE.IcosahedronGeometry( 1, 2 );
  	var distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );

  	this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
  	this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );

  	var d = light.distance;

  	if ( d === 0.0 ) {

  		this.lightDistance.visible = false;

  	} else {

  		this.lightDistance.scale.set( d, d, d );

  	}

  	this.add( this.lightDistance );
  	*/

  };

  PointLightHelper.prototype = Object.create( Mesh.prototype );
  PointLightHelper.prototype.constructor = PointLightHelper;

  PointLightHelper.prototype.dispose = function () {

  	this.geometry.dispose();
  	this.material.dispose();

  };

  PointLightHelper.prototype.update = function () {

  	this.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );

  	/*
  	var d = this.light.distance;

  	if ( d === 0.0 ) {

  		this.lightDistance.visible = false;

  	} else {

  		this.lightDistance.visible = true;
  		this.lightDistance.scale.set( d, d, d );

  	}
  	*/

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

  	Geometry.call( this );

  	this.type = 'SphereGeometry';

  	this.parameters = {
  		radius: radius,
  		widthSegments: widthSegments,
  		heightSegments: heightSegments,
  		phiStart: phiStart,
  		phiLength: phiLength,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	this.fromBufferGeometry( new SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) );

  };

  SphereGeometry.prototype = Object.create( Geometry.prototype );
  SphereGeometry.prototype.constructor = SphereGeometry;

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   */

  function HemisphereLightHelper( light, sphereSize ) {

  	Object3D.call( this );

  	this.light = light;
  	this.light.updateMatrixWorld();

  	this.matrix = light.matrixWorld;
  	this.matrixAutoUpdate = false;

  	this.colors = [ new Color(), new Color() ];

  	var geometry = new SphereGeometry( sphereSize, 4, 2 );
  	geometry.rotateX( - Math.PI / 2 );

  	for ( var i = 0, il = 8; i < il; i ++ ) {

  		geometry.faces[ i ].color = this.colors[ i < 4 ? 0 : 1 ];

  	}

  	var material = new MeshBasicMaterial( { vertexColors: FaceColors, wireframe: true } );

  	this.lightSphere = new Mesh( geometry, material );
  	this.add( this.lightSphere );

  	this.update();

  };

  HemisphereLightHelper.prototype = Object.create( Object3D.prototype );
  HemisphereLightHelper.prototype.constructor = HemisphereLightHelper;

  HemisphereLightHelper.prototype.dispose = function () {

  	this.lightSphere.geometry.dispose();
  	this.lightSphere.material.dispose();

  };

  HemisphereLightHelper.prototype.update = function () {

  	var vector = new Vector3();

  	return function update() {

  		this.colors[ 0 ].copy( this.light.color ).multiplyScalar( this.light.intensity );
  		this.colors[ 1 ].copy( this.light.groundColor ).multiplyScalar( this.light.intensity );

  		this.lightSphere.lookAt( vector.setFromMatrixPosition( this.light.matrixWorld ).negate() );
  		this.lightSphere.geometry.colorsNeedUpdate = true;

  	};

  }();

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function GridHelper( size, divisions, color1, color2 ) {

  	divisions = divisions || 1;
  	color1 = new Color( color1 !== undefined ? color1 : 0x444444 );
  	color2 = new Color( color2 !== undefined ? color2 : 0x888888 );

  	var center = divisions / 2;
  	var step = ( size * 2 ) / divisions;
  	var vertices = [], colors = [];

  	for ( var i = 0, j = 0, k = - size; i <= divisions; i ++, k += step ) {

  		vertices.push( - size, 0, k, size, 0, k );
  		vertices.push( k, 0, - size, k, 0, size );

  		var color = i === center ? color1 : color2;

  		color.toArray( colors, j ); j += 3;
  		color.toArray( colors, j ); j += 3;
  		color.toArray( colors, j ); j += 3;
  		color.toArray( colors, j ); j += 3;

  	}

  	var geometry = new BufferGeometry();
  	geometry.addAttribute( 'position', new Float32Attribute( vertices, 3 ) );
  	geometry.addAttribute( 'color', new Float32Attribute( colors, 3 ) );

  	var material = new LineBasicMaterial( { vertexColors: VertexColors } );

  	LineSegments.call( this, geometry, material );

  };

  GridHelper.prototype = Object.create( LineSegments.prototype );
  GridHelper.prototype.constructor = GridHelper;

  GridHelper.prototype.setColors = function () {

  	console.error( 'THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.' );

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   * @author WestLangley / http://github.com/WestLangley
  */

  function FaceNormalsHelper( object, size, hex, linewidth ) {

  	// FaceNormalsHelper only supports THREE.Geometry

  	this.object = object;

  	this.size = ( size !== undefined ) ? size : 1;

  	var color = ( hex !== undefined ) ? hex : 0xffff00;

  	var width = ( linewidth !== undefined ) ? linewidth : 1;

  	//

  	var nNormals = 0;

  	var objGeometry = this.object.geometry;

  	if ( (objGeometry && objGeometry.isGeometry) ) {

  		nNormals = objGeometry.faces.length;

  	} else {

  		console.warn( 'THREE.FaceNormalsHelper: only THREE.Geometry is supported. Use THREE.VertexNormalsHelper, instead.' );

  	}

  	//

  	var geometry = new BufferGeometry();

  	var positions = new Float32Attribute( nNormals * 2 * 3, 3 );

  	geometry.addAttribute( 'position', positions );

  	LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, linewidth: width } ) );

  	//

  	this.matrixAutoUpdate = false;
  	this.update();

  };

  FaceNormalsHelper.prototype = Object.create( LineSegments.prototype );
  FaceNormalsHelper.prototype.constructor = FaceNormalsHelper;

  FaceNormalsHelper.prototype.update = ( function () {

  	var v1 = new Vector3();
  	var v2 = new Vector3();
  	var normalMatrix = new Matrix3();

  	return function update() {

  		this.object.updateMatrixWorld( true );

  		normalMatrix.getNormalMatrix( this.object.matrixWorld );

  		var matrixWorld = this.object.matrixWorld;

  		var position = this.geometry.attributes.position;

  		//

  		var objGeometry = this.object.geometry;

  		var vertices = objGeometry.vertices;

  		var faces = objGeometry.faces;

  		var idx = 0;

  		for ( var i = 0, l = faces.length; i < l; i ++ ) {

  			var face = faces[ i ];

  			var normal = face.normal;

  			v1.copy( vertices[ face.a ] )
  				.add( vertices[ face.b ] )
  				.add( vertices[ face.c ] )
  				.divideScalar( 3 )
  				.applyMatrix4( matrixWorld );

  			v2.copy( normal ).applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );

  			position.setXYZ( idx, v1.x, v1.y, v1.z );

  			idx = idx + 1;

  			position.setXYZ( idx, v2.x, v2.y, v2.z );

  			idx = idx + 1;

  		}

  		position.needsUpdate = true;

  		return this;

  	};

  }() );

  /**
   * @author WestLangley / http://github.com/WestLangley
   */

  function EdgesGeometry( geometry, thresholdAngle ) {

  	BufferGeometry.call( this );

  	thresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;

  	var thresholdDot = Math.cos( exports.Math.DEG2RAD * thresholdAngle );

  	var edge = [ 0, 0 ], hash = {};

  	function sortFunction( a, b ) {

  		return a - b;

  	}

  	var keys = [ 'a', 'b', 'c' ];

  	var geometry2;

  	if ( (geometry && geometry.isBufferGeometry) ) {

  		geometry2 = new Geometry();
  		geometry2.fromBufferGeometry( geometry );

  	} else {

  		geometry2 = geometry.clone();

  	}

  	geometry2.mergeVertices();
  	geometry2.computeFaceNormals();

  	var vertices = geometry2.vertices;
  	var faces = geometry2.faces;

  	for ( var i = 0, l = faces.length; i < l; i ++ ) {

  		var face = faces[ i ];

  		for ( var j = 0; j < 3; j ++ ) {

  			edge[ 0 ] = face[ keys[ j ] ];
  			edge[ 1 ] = face[ keys[ ( j + 1 ) % 3 ] ];
  			edge.sort( sortFunction );

  			var key = edge.toString();

  			if ( hash[ key ] === undefined ) {

  				hash[ key ] = { vert1: edge[ 0 ], vert2: edge[ 1 ], face1: i, face2: undefined };

  			} else {

  				hash[ key ].face2 = i;

  			}

  		}

  	}

  	var coords = [];

  	for ( var key in hash ) {

  		var h = hash[ key ];

  		if ( h.face2 === undefined || faces[ h.face1 ].normal.dot( faces[ h.face2 ].normal ) <= thresholdDot ) {

  			var vertex = vertices[ h.vert1 ];
  			coords.push( vertex.x );
  			coords.push( vertex.y );
  			coords.push( vertex.z );

  			vertex = vertices[ h.vert2 ];
  			coords.push( vertex.x );
  			coords.push( vertex.y );
  			coords.push( vertex.z );

  		}

  	}

  	this.addAttribute( 'position', new BufferAttribute( new Float32Array( coords ), 3 ) );

  };

  EdgesGeometry.prototype = Object.create( BufferGeometry.prototype );
  EdgesGeometry.prototype.constructor = EdgesGeometry;

  /**
   * @author WestLangley / http://github.com/WestLangley
   * @param object THREE.Mesh whose geometry will be used
   * @param hex line color
   * @param thresholdAngle the minimum angle (in degrees),
   * between the face normals of adjacent faces,
   * that is required to render an edge. A value of 10 means
   * an edge is only rendered if the angle is at least 10 degrees.
   */

  function EdgesHelper( object, hex, thresholdAngle ) {

  	var color = ( hex !== undefined ) ? hex : 0xffffff;

  	LineSegments.call( this, new EdgesGeometry( object.geometry, thresholdAngle ), new LineBasicMaterial( { color: color } ) );

  	this.matrix = object.matrixWorld;
  	this.matrixAutoUpdate = false;

  };

  EdgesHelper.prototype = Object.create( LineSegments.prototype );
  EdgesHelper.prototype.constructor = EdgesHelper;

  /**
   * @author alteredq / http://alteredqualia.com/
   * @author mrdoob / http://mrdoob.com/
   * @author WestLangley / http://github.com/WestLangley
   */

  function DirectionalLightHelper( light, size ) {

  	Object3D.call( this );

  	this.light = light;
  	this.light.updateMatrixWorld();

  	this.matrix = light.matrixWorld;
  	this.matrixAutoUpdate = false;

  	if ( size === undefined ) size = 1;

  	var geometry = new BufferGeometry();
  	geometry.addAttribute( 'position', new Float32Attribute( [
  		- size,   size, 0,
  		  size,   size, 0,
  		  size, - size, 0,
  		- size, - size, 0,
  		- size,   size, 0
  	], 3 ) );

  	var material = new LineBasicMaterial( { fog: false } );

  	this.add( new Line( geometry, material ) );

  	geometry = new BufferGeometry();
  	geometry.addAttribute( 'position', new Float32Attribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );

  	this.add( new Line( geometry, material ));

  	this.update();

  };

  DirectionalLightHelper.prototype = Object.create( Object3D.prototype );
  DirectionalLightHelper.prototype.constructor = DirectionalLightHelper;

  DirectionalLightHelper.prototype.dispose = function () {

  	var lightPlane = this.children[ 0 ];
  	var targetLine = this.children[ 1 ];

  	lightPlane.geometry.dispose();
  	lightPlane.material.dispose();
  	targetLine.geometry.dispose();
  	targetLine.material.dispose();

  };

  DirectionalLightHelper.prototype.update = function () {

  	var v1 = new Vector3();
  	var v2 = new Vector3();
  	var v3 = new Vector3();

  	return function update() {

  		v1.setFromMatrixPosition( this.light.matrixWorld );
  		v2.setFromMatrixPosition( this.light.target.matrixWorld );
  		v3.subVectors( v2, v1 );

  		var lightPlane = this.children[ 0 ];
  		var targetLine = this.children[ 1 ];

  		lightPlane.lookAt( v3 );
  		lightPlane.material.color.copy( this.light.color ).multiplyScalar( this.light.intensity );

  		targetLine.lookAt( v3 );
  		targetLine.scale.z = v3.length();

  	};

  }();

  /**
   * @author alteredq / http://alteredqualia.com/
   *
   *	- shows frustum, line of sight and up of the camera
   *	- suitable for fast updates
   * 	- based on frustum visualization in lightgl.js shadowmap example
   *		http://evanw.github.com/lightgl.js/tests/shadowmap.html
   */

  function CameraHelper( camera ) {

  	var geometry = new Geometry();
  	var material = new LineBasicMaterial( { color: 0xffffff, vertexColors: FaceColors } );

  	var pointMap = {};

  	// colors

  	var hexFrustum = 0xffaa00;
  	var hexCone = 0xff0000;
  	var hexUp = 0x00aaff;
  	var hexTarget = 0xffffff;
  	var hexCross = 0x333333;

  	// near

  	addLine( "n1", "n2", hexFrustum );
  	addLine( "n2", "n4", hexFrustum );
  	addLine( "n4", "n3", hexFrustum );
  	addLine( "n3", "n1", hexFrustum );

  	// far

  	addLine( "f1", "f2", hexFrustum );
  	addLine( "f2", "f4", hexFrustum );
  	addLine( "f4", "f3", hexFrustum );
  	addLine( "f3", "f1", hexFrustum );

  	// sides

  	addLine( "n1", "f1", hexFrustum );
  	addLine( "n2", "f2", hexFrustum );
  	addLine( "n3", "f3", hexFrustum );
  	addLine( "n4", "f4", hexFrustum );

  	// cone

  	addLine( "p", "n1", hexCone );
  	addLine( "p", "n2", hexCone );
  	addLine( "p", "n3", hexCone );
  	addLine( "p", "n4", hexCone );

  	// up

  	addLine( "u1", "u2", hexUp );
  	addLine( "u2", "u3", hexUp );
  	addLine( "u3", "u1", hexUp );

  	// target

  	addLine( "c", "t", hexTarget );
  	addLine( "p", "c", hexCross );

  	// cross

  	addLine( "cn1", "cn2", hexCross );
  	addLine( "cn3", "cn4", hexCross );

  	addLine( "cf1", "cf2", hexCross );
  	addLine( "cf3", "cf4", hexCross );

  	function addLine( a, b, hex ) {

  		addPoint( a, hex );
  		addPoint( b, hex );

  	}

  	function addPoint( id, hex ) {

  		geometry.vertices.push( new Vector3() );
  		geometry.colors.push( new Color( hex ) );

  		if ( pointMap[ id ] === undefined ) {

  			pointMap[ id ] = [];

  		}

  		pointMap[ id ].push( geometry.vertices.length - 1 );

  	}

  	LineSegments.call( this, geometry, material );

  	this.camera = camera;
  	if( this.camera.updateProjectionMatrix ) this.camera.updateProjectionMatrix();

  	this.matrix = camera.matrixWorld;
  	this.matrixAutoUpdate = false;

  	this.pointMap = pointMap;

  	this.update();

  };

  CameraHelper.prototype = Object.create( LineSegments.prototype );
  CameraHelper.prototype.constructor = CameraHelper;

  CameraHelper.prototype.update = function () {

  	var geometry, pointMap;

  	var vector = new Vector3();
  	var camera = new Camera();

  	function setPoint( point, x, y, z ) {

  		vector.set( x, y, z ).unproject( camera );

  		var points = pointMap[ point ];

  		if ( points !== undefined ) {

  			for ( var i = 0, il = points.length; i < il; i ++ ) {

  				geometry.vertices[ points[ i ] ].copy( vector );

  			}

  		}

  	}

  	return function update() {

  		geometry = this.geometry;
  		pointMap = this.pointMap;

  		var w = 1, h = 1;

  		// we need just camera projection matrix
  		// world matrix must be identity

  		camera.projectionMatrix.copy( this.camera.projectionMatrix );

  		// center / target

  		setPoint( "c", 0, 0, - 1 );
  		setPoint( "t", 0, 0,  1 );

  		// near

  		setPoint( "n1", - w, - h, - 1 );
  		setPoint( "n2",   w, - h, - 1 );
  		setPoint( "n3", - w,   h, - 1 );
  		setPoint( "n4",   w,   h, - 1 );

  		// far

  		setPoint( "f1", - w, - h, 1 );
  		setPoint( "f2",   w, - h, 1 );
  		setPoint( "f3", - w,   h, 1 );
  		setPoint( "f4",   w,   h, 1 );

  		// up

  		setPoint( "u1",   w * 0.7, h * 1.1, - 1 );
  		setPoint( "u2", - w * 0.7, h * 1.1, - 1 );
  		setPoint( "u3",         0, h * 2,   - 1 );

  		// cross

  		setPoint( "cf1", - w,   0, 1 );
  		setPoint( "cf2",   w,   0, 1 );
  		setPoint( "cf3",   0, - h, 1 );
  		setPoint( "cf4",   0,   h, 1 );

  		setPoint( "cn1", - w,   0, - 1 );
  		setPoint( "cn2",   w,   0, - 1 );
  		setPoint( "cn3",   0, - h, - 1 );
  		setPoint( "cn4",   0,   h, - 1 );

  		geometry.verticesNeedUpdate = true;

  	};

  }();

  /**
   * @author mrdoob / http://mrdoob.com/
   * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Cube.as
   */

  function BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {

  	Geometry.call( this );

  	this.type = 'BoxGeometry';

  	this.parameters = {
  		width: width,
  		height: height,
  		depth: depth,
  		widthSegments: widthSegments,
  		heightSegments: heightSegments,
  		depthSegments: depthSegments
  	};

  	this.fromBufferGeometry( new BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) );
  	this.mergeVertices();

  };

  BoxGeometry.prototype = Object.create( Geometry.prototype );
  BoxGeometry.prototype.constructor = BoxGeometry;

  exports.CubeGeometry = BoxGeometry;

  /**
   * @author WestLangley / http://github.com/WestLangley
   */

  // a helper to show the world-axis-aligned bounding box for an object

  function BoundingBoxHelper( object, hex ) {

  	var color = ( hex !== undefined ) ? hex : 0x888888;

  	this.object = object;

  	this.box = new Box3();

  	Mesh.call( this, new BoxGeometry( 1, 1, 1 ), new MeshBasicMaterial( { color: color, wireframe: true } ) );

  };

  BoundingBoxHelper.prototype = Object.create( Mesh.prototype );
  BoundingBoxHelper.prototype.constructor = BoundingBoxHelper;

  BoundingBoxHelper.prototype.update = function () {

  	this.box.setFromObject( this.object );

  	this.box.size( this.scale );

  	this.box.center( this.position );

  };

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function BoxHelper( object, color ) {

  	if ( color === undefined ) color = 0xffff00;

  	var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );
  	var positions = new Float32Array( 8 * 3 );

  	var geometry = new BufferGeometry();
  	geometry.setIndex( new BufferAttribute( indices, 1 ) );
  	geometry.addAttribute( 'position', new BufferAttribute( positions, 3 ) );

  	LineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );

  	if ( object !== undefined ) {

  		this.update( object );

  	}

  };

  BoxHelper.prototype = Object.create( LineSegments.prototype );
  BoxHelper.prototype.constructor = BoxHelper;

  BoxHelper.prototype.update = ( function () {

  	var box = new Box3();

  	return function update( object ) {

  		if ( (object && object.isBox3) ) {

  			box.copy( object );

  		} else {

  			box.setFromObject( object );

  		}

  		if ( box.isEmpty() ) return;

  		var min = box.min;
  		var max = box.max;

  		/*
  		  5____4
  		1/___0/|
  		| 6__|_7
  		2/___3/

  		0: max.x, max.y, max.z
  		1: min.x, max.y, max.z
  		2: min.x, min.y, max.z
  		3: max.x, min.y, max.z
  		4: max.x, max.y, min.z
  		5: min.x, max.y, min.z
  		6: min.x, min.y, min.z
  		7: max.x, min.y, min.z
  		*/

  		var position = this.geometry.attributes.position;
  		var array = position.array;

  		array[  0 ] = max.x; array[  1 ] = max.y; array[  2 ] = max.z;
  		array[  3 ] = min.x; array[  4 ] = max.y; array[  5 ] = max.z;
  		array[  6 ] = min.x; array[  7 ] = min.y; array[  8 ] = max.z;
  		array[  9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;
  		array[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;
  		array[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;
  		array[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;
  		array[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;

  		position.needsUpdate = true;

  		this.geometry.computeBoundingSphere();

  	};

  } )();

  /**
   * @author Mugen87 / https://github.com/Mugen87
   */

  function CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

  	BufferGeometry.call( this );

  	this.type = 'CylinderBufferGeometry';

  	this.parameters = {
  		radiusTop: radiusTop,
  		radiusBottom: radiusBottom,
  		height: height,
  		radialSegments: radialSegments,
  		heightSegments: heightSegments,
  		openEnded: openEnded,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	var scope = this;

  	radiusTop = radiusTop !== undefined ? radiusTop : 20;
  	radiusBottom = radiusBottom !== undefined ? radiusBottom : 20;
  	height = height !== undefined ? height : 100;

  	radialSegments = Math.floor( radialSegments ) || 8;
  	heightSegments = Math.floor( heightSegments ) || 1;

  	openEnded = openEnded !== undefined ? openEnded : false;
  	thetaStart = thetaStart !== undefined ? thetaStart : 0.0;
  	thetaLength = thetaLength !== undefined ? thetaLength : 2.0 * Math.PI;

  	// used to calculate buffer length

  	var nbCap = 0;

  	if ( openEnded === false ) {

  		if ( radiusTop > 0 ) nbCap ++;
  		if ( radiusBottom > 0 ) nbCap ++;

  	}

  	var vertexCount = calculateVertexCount();
  	var indexCount = calculateIndexCount();

  	// buffers

  	var indices = new BufferAttribute( new ( indexCount > 65535 ? Uint32Array : Uint16Array )( indexCount ), 1 );
  	var vertices = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var normals = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var uvs = new BufferAttribute( new Float32Array( vertexCount * 2 ), 2 );

  	// helper variables

  	var index = 0,
  	    indexOffset = 0,
  	    indexArray = [],
  	    halfHeight = height / 2;

  	// group variables
  	var groupStart = 0;

  	// generate geometry

  	generateTorso();

  	if ( openEnded === false ) {

  		if ( radiusTop > 0 ) generateCap( true );
  		if ( radiusBottom > 0 ) generateCap( false );

  	}

  	// build geometry

  	this.setIndex( indices );
  	this.addAttribute( 'position', vertices );
  	this.addAttribute( 'normal', normals );
  	this.addAttribute( 'uv', uvs );

  	// helper functions

  	function calculateVertexCount() {

  		var count = ( radialSegments + 1 ) * ( heightSegments + 1 );

  		if ( openEnded === false ) {

  			count += ( ( radialSegments + 1 ) * nbCap ) + ( radialSegments * nbCap );

  		}

  		return count;

  	}

  	function calculateIndexCount() {

  		var count = radialSegments * heightSegments * 2 * 3;

  		if ( openEnded === false ) {

  			count += radialSegments * nbCap * 3;

  		}

  		return count;

  	}

  	function generateTorso() {

  		var x, y;
  		var normal = new Vector3();
  		var vertex = new Vector3();

  		var groupCount = 0;

  		// this will be used to calculate the normal
  		var tanTheta = ( radiusBottom - radiusTop ) / height;

  		// generate vertices, normals and uvs

  		for ( y = 0; y <= heightSegments; y ++ ) {

  			var indexRow = [];

  			var v = y / heightSegments;

  			// calculate the radius of the current row
  			var radius = v * ( radiusBottom - radiusTop ) + radiusTop;

  			for ( x = 0; x <= radialSegments; x ++ ) {

  				var u = x / radialSegments;

  				// vertex
  				vertex.x = radius * Math.sin( u * thetaLength + thetaStart );
  				vertex.y = - v * height + halfHeight;
  				vertex.z = radius * Math.cos( u * thetaLength + thetaStart );
  				vertices.setXYZ( index, vertex.x, vertex.y, vertex.z );

  				// normal
  				normal.copy( vertex );

  				// handle special case if radiusTop/radiusBottom is zero

  				if ( ( radiusTop === 0 && y === 0 ) || ( radiusBottom === 0 && y === heightSegments ) ) {

  					normal.x = Math.sin( u * thetaLength + thetaStart );
  					normal.z = Math.cos( u * thetaLength + thetaStart );

  				}

  				normal.setY( Math.sqrt( normal.x * normal.x + normal.z * normal.z ) * tanTheta ).normalize();
  				normals.setXYZ( index, normal.x, normal.y, normal.z );

  				// uv
  				uvs.setXY( index, u, 1 - v );

  				// save index of vertex in respective row
  				indexRow.push( index );

  				// increase index
  				index ++;

  			}

  			// now save vertices of the row in our index array
  			indexArray.push( indexRow );

  		}

  		// generate indices

  		for ( x = 0; x < radialSegments; x ++ ) {

  			for ( y = 0; y < heightSegments; y ++ ) {

  				// we use the index array to access the correct indices
  				var i1 = indexArray[ y ][ x ];
  				var i2 = indexArray[ y + 1 ][ x ];
  				var i3 = indexArray[ y + 1 ][ x + 1 ];
  				var i4 = indexArray[ y ][ x + 1 ];

  				// face one
  				indices.setX( indexOffset, i1 ); indexOffset ++;
  				indices.setX( indexOffset, i2 ); indexOffset ++;
  				indices.setX( indexOffset, i4 ); indexOffset ++;

  				// face two
  				indices.setX( indexOffset, i2 ); indexOffset ++;
  				indices.setX( indexOffset, i3 ); indexOffset ++;
  				indices.setX( indexOffset, i4 ); indexOffset ++;

  				// update counters
  				groupCount += 6;

  			}

  		}

  		// add a group to the geometry. this will ensure multi material support
  		scope.addGroup( groupStart, groupCount, 0 );

  		// calculate new start value for groups
  		groupStart += groupCount;

  	}

  	function generateCap( top ) {

  		var x, centerIndexStart, centerIndexEnd;

  		var uv = new Vector2();
  		var vertex = new Vector3();

  		var groupCount = 0;

  		var radius = ( top === true ) ? radiusTop : radiusBottom;
  		var sign = ( top === true ) ? 1 : - 1;

  		// save the index of the first center vertex
  		centerIndexStart = index;

  		// first we generate the center vertex data of the cap.
  		// because the geometry needs one set of uvs per face,
  		// we must generate a center vertex per face/segment

  		for ( x = 1; x <= radialSegments; x ++ ) {

  			// vertex
  			vertices.setXYZ( index, 0, halfHeight * sign, 0 );

  			// normal
  			normals.setXYZ( index, 0, sign, 0 );

  			// uv
  			uv.x = 0.5;
  			uv.y = 0.5;

  			uvs.setXY( index, uv.x, uv.y );

  			// increase index
  			index ++;

  		}

  		// save the index of the last center vertex
  		centerIndexEnd = index;

  		// now we generate the surrounding vertices, normals and uvs

  		for ( x = 0; x <= radialSegments; x ++ ) {

  			var u = x / radialSegments;
  			var theta = u * thetaLength + thetaStart;

  			var cosTheta = Math.cos( theta );
  			var sinTheta = Math.sin( theta );

  			// vertex
  			vertex.x = radius * sinTheta;
  			vertex.y = halfHeight * sign;
  			vertex.z = radius * cosTheta;
  			vertices.setXYZ( index, vertex.x, vertex.y, vertex.z );

  			// normal
  			normals.setXYZ( index, 0, sign, 0 );

  			// uv
  			uv.x = ( cosTheta * 0.5 ) + 0.5;
  			uv.y = ( sinTheta * 0.5 * sign ) + 0.5;
  			uvs.setXY( index, uv.x, uv.y );

  			// increase index
  			index ++;

  		}

  		// generate indices

  		for ( x = 0; x < radialSegments; x ++ ) {

  			var c = centerIndexStart + x;
  			var i = centerIndexEnd + x;

  			if ( top === true ) {

  				// face top
  				indices.setX( indexOffset, i ); indexOffset ++;
  				indices.setX( indexOffset, i + 1 ); indexOffset ++;
  				indices.setX( indexOffset, c ); indexOffset ++;

  			} else {

  				// face bottom
  				indices.setX( indexOffset, i + 1 ); indexOffset ++;
  				indices.setX( indexOffset, i ); indexOffset ++;
  				indices.setX( indexOffset, c ); indexOffset ++;

  			}

  			// update counters
  			groupCount += 3;

  		}

  		// add a group to the geometry. this will ensure multi material support
  		scope.addGroup( groupStart, groupCount, top === true ? 1 : 2 );

  		// calculate new start value for groups
  		groupStart += groupCount;

  	}

  };

  CylinderBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  CylinderBufferGeometry.prototype.constructor = CylinderBufferGeometry;

  /**
   * @author WestLangley / http://github.com/WestLangley
   * @author zz85 / http://github.com/zz85
   * @author bhouston / http://clara.io
   *
   * Creates an arrow for visualizing directions
   *
   * Parameters:
   *  dir - Vector3
   *  origin - Vector3
   *  length - Number
   *  color - color in hex value
   *  headLength - Number
   *  headWidth - Number
   */

  exports.ArrowHelper = ( function () {

  	var lineGeometry = new BufferGeometry();
  	lineGeometry.addAttribute( 'position', new Float32Attribute( [ 0, 0, 0, 0, 1, 0 ], 3 ) );

  	var coneGeometry = new CylinderBufferGeometry( 0, 0.5, 1, 5, 1 );
  	coneGeometry.translate( 0, - 0.5, 0 );

  	return function ArrowHelper( dir, origin, length, color, headLength, headWidth ) {

  		// dir is assumed to be normalized

  		Object3D.call( this );

  		if ( color === undefined ) color = 0xffff00;
  		if ( length === undefined ) length = 1;
  		if ( headLength === undefined ) headLength = 0.2 * length;
  		if ( headWidth === undefined ) headWidth = 0.2 * headLength;

  		this.position.copy( origin );

  		this.line = new Line( lineGeometry, new LineBasicMaterial( { color: color } ) );
  		this.line.matrixAutoUpdate = false;
  		this.add( this.line );

  		this.cone = new Mesh( coneGeometry, new MeshBasicMaterial( { color: color } ) );
  		this.cone.matrixAutoUpdate = false;
  		this.add( this.cone );

  		this.setDirection( dir );
  		this.setLength( length, headLength, headWidth );

  	};

  }() );

  exports.ArrowHelper.prototype = Object.create( Object3D.prototype );
  exports.ArrowHelper.prototype.constructor = exports.ArrowHelper;

  exports.ArrowHelper.prototype.setDirection = ( function () {

  	var axis = new Vector3();
  	var radians;

  	return function setDirection( dir ) {

  		// dir is assumed to be normalized

  		if ( dir.y > 0.99999 ) {

  			this.quaternion.set( 0, 0, 0, 1 );

  		} else if ( dir.y < - 0.99999 ) {

  			this.quaternion.set( 1, 0, 0, 0 );

  		} else {

  			axis.set( dir.z, 0, - dir.x ).normalize();

  			radians = Math.acos( dir.y );

  			this.quaternion.setFromAxisAngle( axis, radians );

  		}

  	};

  }() );

  exports.ArrowHelper.prototype.setLength = function ( length, headLength, headWidth ) {

  	if ( headLength === undefined ) headLength = 0.2 * length;
  	if ( headWidth === undefined ) headWidth = 0.2 * headLength;

  	this.line.scale.set( 1, Math.max( 0, length - headLength ), 1 );
  	this.line.updateMatrix();

  	this.cone.scale.set( headWidth, headLength, headWidth );
  	this.cone.position.y = length;
  	this.cone.updateMatrix();

  };

  exports.ArrowHelper.prototype.setColor = function ( color ) {

  	this.line.material.color.copy( color );
  	this.cone.material.color.copy( color );

  };

  /**
   * @author sroucheray / http://sroucheray.org/
   * @author mrdoob / http://mrdoob.com/
   */

  function AxisHelper( size ) {

  	size = size || 1;

  	var vertices = new Float32Array( [
  		0, 0, 0,  size, 0, 0,
  		0, 0, 0,  0, size, 0,
  		0, 0, 0,  0, 0, size
  	] );

  	var colors = new Float32Array( [
  		1, 0, 0,  1, 0.6, 0,
  		0, 1, 0,  0.6, 1, 0,
  		0, 0, 1,  0, 0.6, 1
  	] );

  	var geometry = new BufferGeometry();
  	geometry.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );
  	geometry.addAttribute( 'color', new BufferAttribute( colors, 3 ) );

  	var material = new LineBasicMaterial( { vertexColors: VertexColors } );

  	LineSegments.call( this, geometry, material );

  };

  AxisHelper.prototype = Object.create( LineSegments.prototype );
  AxisHelper.prototype.constructor = AxisHelper;

  /**
   * @author zz85 / https://github.com/zz85
   * Parametric Surfaces Geometry
   * based on the brilliant article by @prideout http://prideout.net/blog/?p=44
   *
   * new THREE.ParametricGeometry( parametricFunction, uSegments, ySegements );
   *
   */

  function ParametricGeometry( func, slices, stacks ) {

  	Geometry.call( this );

  	this.type = 'ParametricGeometry';

  	this.parameters = {
  		func: func,
  		slices: slices,
  		stacks: stacks
  	};

  	var verts = this.vertices;
  	var faces = this.faces;
  	var uvs = this.faceVertexUvs[ 0 ];

  	var i, j, p;
  	var u, v;

  	var sliceCount = slices + 1;

  	for ( i = 0; i <= stacks; i ++ ) {

  		v = i / stacks;

  		for ( j = 0; j <= slices; j ++ ) {

  			u = j / slices;

  			p = func( u, v );
  			verts.push( p );

  		}

  	}

  	var a, b, c, d;
  	var uva, uvb, uvc, uvd;

  	for ( i = 0; i < stacks; i ++ ) {

  		for ( j = 0; j < slices; j ++ ) {

  			a = i * sliceCount + j;
  			b = i * sliceCount + j + 1;
  			c = ( i + 1 ) * sliceCount + j + 1;
  			d = ( i + 1 ) * sliceCount + j;

  			uva = new Vector2( j / slices, i / stacks );
  			uvb = new Vector2( ( j + 1 ) / slices, i / stacks );
  			uvc = new Vector2( ( j + 1 ) / slices, ( i + 1 ) / stacks );
  			uvd = new Vector2( j / slices, ( i + 1 ) / stacks );

  			faces.push( new Face3( a, b, d ) );
  			uvs.push( [ uva, uvb, uvd ] );

  			faces.push( new Face3( b, c, d ) );
  			uvs.push( [ uvb.clone(), uvc, uvd.clone() ] );

  		}

  	}

  	// console.log(this);

  	// magic bullet
  	// var diff = this.mergeVertices();
  	// console.log('removed ', diff, ' vertices by merging');

  	this.computeFaceNormals();
  	this.computeVertexNormals();

  };

  ParametricGeometry.prototype = Object.create( Geometry.prototype );
  ParametricGeometry.prototype.constructor = ParametricGeometry;

  /**
   * @author clockworkgeek / https://github.com/clockworkgeek
   * @author timothypratley / https://github.com/timothypratley
   * @author WestLangley / http://github.com/WestLangley
  */

  function PolyhedronGeometry( vertices, indices, radius, detail ) {

  	Geometry.call( this );

  	this.type = 'PolyhedronGeometry';

  	this.parameters = {
  		vertices: vertices,
  		indices: indices,
  		radius: radius,
  		detail: detail
  	};

  	radius = radius || 1;
  	detail = detail || 0;

  	var that = this;

  	for ( var i = 0, l = vertices.length; i < l; i += 3 ) {

  		prepare( new Vector3( vertices[ i ], vertices[ i + 1 ], vertices[ i + 2 ] ) );

  	}

  	var p = this.vertices;

  	var faces = [];

  	for ( var i = 0, j = 0, l = indices.length; i < l; i += 3, j ++ ) {

  		var v1 = p[ indices[ i ] ];
  		var v2 = p[ indices[ i + 1 ] ];
  		var v3 = p[ indices[ i + 2 ] ];

  		faces[ j ] = new Face3( v1.index, v2.index, v3.index, [ v1.clone(), v2.clone(), v3.clone() ] );

  	}

  	var centroid = new Vector3();

  	for ( var i = 0, l = faces.length; i < l; i ++ ) {

  		subdivide( faces[ i ], detail );

  	}


  	// Handle case when face straddles the seam

  	for ( var i = 0, l = this.faceVertexUvs[ 0 ].length; i < l; i ++ ) {

  		var uvs = this.faceVertexUvs[ 0 ][ i ];

  		var x0 = uvs[ 0 ].x;
  		var x1 = uvs[ 1 ].x;
  		var x2 = uvs[ 2 ].x;

  		var max = Math.max( x0, x1, x2 );
  		var min = Math.min( x0, x1, x2 );

  		if ( max > 0.9 && min < 0.1 ) {

  			// 0.9 is somewhat arbitrary

  			if ( x0 < 0.2 ) uvs[ 0 ].x += 1;
  			if ( x1 < 0.2 ) uvs[ 1 ].x += 1;
  			if ( x2 < 0.2 ) uvs[ 2 ].x += 1;

  		}

  	}


  	// Apply radius

  	for ( var i = 0, l = this.vertices.length; i < l; i ++ ) {

  		this.vertices[ i ].multiplyScalar( radius );

  	}


  	// Merge vertices

  	this.mergeVertices();

  	this.computeFaceNormals();

  	this.boundingSphere = new Sphere( new Vector3(), radius );


  	// Project vector onto sphere's surface

  	function prepare( vector ) {

  		var vertex = vector.normalize().clone();
  		vertex.index = that.vertices.push( vertex ) - 1;

  		// Texture coords are equivalent to map coords, calculate angle and convert to fraction of a circle.

  		var u = azimuth( vector ) / 2 / Math.PI + 0.5;
  		var v = inclination( vector ) / Math.PI + 0.5;
  		vertex.uv = new Vector2( u, 1 - v );

  		return vertex;

  	}


  	// Approximate a curved face with recursively sub-divided triangles.

  	function make( v1, v2, v3 ) {

  		var face = new Face3( v1.index, v2.index, v3.index, [ v1.clone(), v2.clone(), v3.clone() ] );
  		that.faces.push( face );

  		centroid.copy( v1 ).add( v2 ).add( v3 ).divideScalar( 3 );

  		var azi = azimuth( centroid );

  		that.faceVertexUvs[ 0 ].push( [
  			correctUV( v1.uv, v1, azi ),
  			correctUV( v2.uv, v2, azi ),
  			correctUV( v3.uv, v3, azi )
  		] );

  	}


  	// Analytically subdivide a face to the required detail level.

  	function subdivide( face, detail ) {

  		var cols = Math.pow( 2, detail );
  		var a = prepare( that.vertices[ face.a ] );
  		var b = prepare( that.vertices[ face.b ] );
  		var c = prepare( that.vertices[ face.c ] );
  		var v = [];

  		// Construct all of the vertices for this subdivision.

  		for ( var i = 0 ; i <= cols; i ++ ) {

  			v[ i ] = [];

  			var aj = prepare( a.clone().lerp( c, i / cols ) );
  			var bj = prepare( b.clone().lerp( c, i / cols ) );
  			var rows = cols - i;

  			for ( var j = 0; j <= rows; j ++ ) {

  				if ( j === 0 && i === cols ) {

  					v[ i ][ j ] = aj;

  				} else {

  					v[ i ][ j ] = prepare( aj.clone().lerp( bj, j / rows ) );

  				}

  			}

  		}

  		// Construct all of the faces.

  		for ( var i = 0; i < cols ; i ++ ) {

  			for ( var j = 0; j < 2 * ( cols - i ) - 1; j ++ ) {

  				var k = Math.floor( j / 2 );

  				if ( j % 2 === 0 ) {

  					make(
  						v[ i ][ k + 1 ],
  						v[ i + 1 ][ k ],
  						v[ i ][ k ]
  					);

  				} else {

  					make(
  						v[ i ][ k + 1 ],
  						v[ i + 1 ][ k + 1 ],
  						v[ i + 1 ][ k ]
  					);

  				}

  			}

  		}

  	}


  	// Angle around the Y axis, counter-clockwise when looking from above.

  	function azimuth( vector ) {

  		return Math.atan2( vector.z, - vector.x );

  	}


  	// Angle above the XZ plane.

  	function inclination( vector ) {

  		return Math.atan2( - vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );

  	}


  	// Texture fixing helper. Spheres have some odd behaviours.

  	function correctUV( uv, vector, azimuth ) {

  		if ( ( azimuth < 0 ) && ( uv.x === 1 ) ) uv = new Vector2( uv.x - 1, uv.y );
  		if ( ( vector.x === 0 ) && ( vector.z === 0 ) ) uv = new Vector2( azimuth / 2 / Math.PI + 0.5, uv.y );
  		return uv.clone();

  	}


  };

  PolyhedronGeometry.prototype = Object.create( Geometry.prototype );
  PolyhedronGeometry.prototype.constructor = PolyhedronGeometry;

  /**
   * @author timothypratley / https://github.com/timothypratley
   */

  function TetrahedronGeometry( radius, detail ) {

  	var vertices = [
  		 1,  1,  1,   - 1, - 1,  1,   - 1,  1, - 1,    1, - 1, - 1
  	];

  	var indices = [
  		 2,  1,  0,    0,  3,  2,    1,  3,  0,    2,  3,  1
  	];

  	PolyhedronGeometry.call( this, vertices, indices, radius, detail );

  	this.type = 'TetrahedronGeometry';

  	this.parameters = {
  		radius: radius,
  		detail: detail
  	};

  };

  TetrahedronGeometry.prototype = Object.create( PolyhedronGeometry.prototype );
  TetrahedronGeometry.prototype.constructor = TetrahedronGeometry;

  /**
   * @author timothypratley / https://github.com/timothypratley
   */

  function OctahedronGeometry( radius, detail ) {

  	var vertices = [
  		1, 0, 0,   - 1, 0, 0,    0, 1, 0,    0, - 1, 0,    0, 0, 1,    0, 0, - 1
  	];

  	var indices = [
  		0, 2, 4,    0, 4, 3,    0, 3, 5,    0, 5, 2,    1, 2, 5,    1, 5, 3,    1, 3, 4,    1, 4, 2
  	];

  	PolyhedronGeometry.call( this, vertices, indices, radius, detail );

  	this.type = 'OctahedronGeometry';

  	this.parameters = {
  		radius: radius,
  		detail: detail
  	};

  };

  OctahedronGeometry.prototype = Object.create( PolyhedronGeometry.prototype );
  OctahedronGeometry.prototype.constructor = OctahedronGeometry;

  /**
   * @author timothypratley / https://github.com/timothypratley
   */

  function IcosahedronGeometry( radius, detail ) {

  	var t = ( 1 + Math.sqrt( 5 ) ) / 2;

  	var vertices = [
  		- 1,  t,  0,    1,  t,  0,   - 1, - t,  0,    1, - t,  0,
  		 0, - 1,  t,    0,  1,  t,    0, - 1, - t,    0,  1, - t,
  		 t,  0, - 1,    t,  0,  1,   - t,  0, - 1,   - t,  0,  1
  	];

  	var indices = [
  		 0, 11,  5,    0,  5,  1,    0,  1,  7,    0,  7, 10,    0, 10, 11,
  		 1,  5,  9,    5, 11,  4,   11, 10,  2,   10,  7,  6,    7,  1,  8,
  		 3,  9,  4,    3,  4,  2,    3,  2,  6,    3,  6,  8,    3,  8,  9,
  		 4,  9,  5,    2,  4, 11,    6,  2, 10,    8,  6,  7,    9,  8,  1
  	];

  	PolyhedronGeometry.call( this, vertices, indices, radius, detail );

  	this.type = 'IcosahedronGeometry';

  	this.parameters = {
  		radius: radius,
  		detail: detail
  	};

  };

  IcosahedronGeometry.prototype = Object.create( PolyhedronGeometry.prototype );
  IcosahedronGeometry.prototype.constructor = IcosahedronGeometry;

  /**
   * @author Abe Pazos / https://hamoid.com
   */

  function DodecahedronGeometry( radius, detail ) {

  	var t = ( 1 + Math.sqrt( 5 ) ) / 2;
  	var r = 1 / t;

  	var vertices = [

  		// (±1, ±1, ±1)
  		- 1, - 1, - 1,    - 1, - 1,  1,
  		- 1,  1, - 1,    - 1,  1,  1,
  		 1, - 1, - 1,     1, - 1,  1,
  		 1,  1, - 1,     1,  1,  1,

  		// (0, ±1/φ, ±φ)
  		 0, - r, - t,     0, - r,  t,
  		 0,  r, - t,     0,  r,  t,

  		// (±1/φ, ±φ, 0)
  		- r, - t,  0,    - r,  t,  0,
  		 r, - t,  0,     r,  t,  0,

  		// (±φ, 0, ±1/φ)
  		- t,  0, - r,     t,  0, - r,
  		- t,  0,  r,     t,  0,  r
  	];

  	var indices = [
  		 3, 11,  7,      3,  7, 15,      3, 15, 13,
  		 7, 19, 17,      7, 17,  6,      7,  6, 15,
  		17,  4,  8,     17,  8, 10,     17, 10,  6,
  		 8,  0, 16,      8, 16,  2,      8,  2, 10,
  		 0, 12,  1,      0,  1, 18,      0, 18, 16,
  		 6, 10,  2,      6,  2, 13,      6, 13, 15,
  		 2, 16, 18,      2, 18,  3,      2,  3, 13,
  		18,  1,  9,     18,  9, 11,     18, 11,  3,
  		 4, 14, 12,      4, 12,  0,      4,  0,  8,
  		11,  9,  5,     11,  5, 19,     11, 19,  7,
  		19,  5, 14,     19, 14,  4,     19,  4, 17,
  		 1, 12, 14,      1, 14,  5,      1,  5,  9
  	];

  	PolyhedronGeometry.call( this, vertices, indices, radius, detail );

  	this.type = 'DodecahedronGeometry';

  	this.parameters = {
  		radius: radius,
  		detail: detail
  	};

  };

  DodecahedronGeometry.prototype = Object.create( PolyhedronGeometry.prototype );
  DodecahedronGeometry.prototype.constructor = DodecahedronGeometry;

  /**
   * @author Mugen87 / https://github.com/Mugen87
   *
   * see: http://www.blackpawn.com/texts/pqtorus/
   */
  function TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) {

  	BufferGeometry.call( this );

  	this.type = 'TorusKnotBufferGeometry';

  	this.parameters = {
  		radius: radius,
  		tube: tube,
  		tubularSegments: tubularSegments,
  		radialSegments: radialSegments,
  		p: p,
  		q: q
  	};

  	radius = radius || 100;
  	tube = tube || 40;
  	tubularSegments = Math.floor( tubularSegments ) || 64;
  	radialSegments = Math.floor( radialSegments ) || 8;
  	p = p || 2;
  	q = q || 3;

  	// used to calculate buffer length
  	var vertexCount = ( ( radialSegments + 1 ) * ( tubularSegments + 1 ) );
  	var indexCount = radialSegments * tubularSegments * 2 * 3;

  	// buffers
  	var indices = new BufferAttribute( new ( indexCount > 65535 ? Uint32Array : Uint16Array )( indexCount ) , 1 );
  	var vertices = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var normals = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var uvs = new BufferAttribute( new Float32Array( vertexCount * 2 ), 2 );

  	// helper variables
  	var i, j, index = 0, indexOffset = 0;

  	var vertex = new Vector3();
  	var normal = new Vector3();
  	var uv = new Vector2();

  	var P1 = new Vector3();
  	var P2 = new Vector3();

  	var B = new Vector3();
  	var T = new Vector3();
  	var N = new Vector3();

  	// generate vertices, normals and uvs

  	for ( i = 0; i <= tubularSegments; ++ i ) {

  		// the radian "u" is used to calculate the position on the torus curve of the current tubular segement

  		var u = i / tubularSegments * p * Math.PI * 2;

  		// now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.
  		// these points are used to create a special "coordinate space", which is necessary to calculate the correct vertex positions

  		calculatePositionOnCurve( u, p, q, radius, P1 );
  		calculatePositionOnCurve( u + 0.01, p, q, radius, P2 );

  		// calculate orthonormal basis

  		T.subVectors( P2, P1 );
  		N.addVectors( P2, P1 );
  		B.crossVectors( T, N );
  		N.crossVectors( B, T );

  		// normalize B, N. T can be ignored, we don't use it

  		B.normalize();
  		N.normalize();

  		for ( j = 0; j <= radialSegments; ++ j ) {

  			// now calculate the vertices. they are nothing more than an extrusion of the torus curve.
  			// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.

  			var v = j / radialSegments * Math.PI * 2;
  			var cx = - tube * Math.cos( v );
  			var cy = tube * Math.sin( v );

  			// now calculate the final vertex position.
  			// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve

  			vertex.x = P1.x + ( cx * N.x + cy * B.x );
  			vertex.y = P1.y + ( cx * N.y + cy * B.y );
  			vertex.z = P1.z + ( cx * N.z + cy * B.z );

  			// vertex
  			vertices.setXYZ( index, vertex.x, vertex.y, vertex.z );

  			// normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)
  			normal.subVectors( vertex, P1 ).normalize();
  			normals.setXYZ( index, normal.x, normal.y, normal.z );

  			// uv
  			uv.x = i / tubularSegments;
  			uv.y = j / radialSegments;
  			uvs.setXY( index, uv.x, uv.y );

  			// increase index
  			index ++;

  		}

  	}

  	// generate indices

  	for ( j = 1; j <= tubularSegments; j ++ ) {

  		for ( i = 1; i <= radialSegments; i ++ ) {

  			// indices
  			var a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );
  			var b = ( radialSegments + 1 ) * j + ( i - 1 );
  			var c = ( radialSegments + 1 ) * j + i;
  			var d = ( radialSegments + 1 ) * ( j - 1 ) + i;

  			// face one
  			indices.setX( indexOffset, a ); indexOffset++;
  			indices.setX( indexOffset, b ); indexOffset++;
  			indices.setX( indexOffset, d ); indexOffset++;

  			// face two
  			indices.setX( indexOffset, b ); indexOffset++;
  			indices.setX( indexOffset, c ); indexOffset++;
  			indices.setX( indexOffset, d ); indexOffset++;

  		}

  	}

  	// build geometry

  	this.setIndex( indices );
  	this.addAttribute( 'position', vertices );
  	this.addAttribute( 'normal', normals );
  	this.addAttribute( 'uv', uvs );

  	// this function calculates the current position on the torus curve

  	function calculatePositionOnCurve( u, p, q, radius, position ) {

  		var cu = Math.cos( u );
  		var su = Math.sin( u );
  		var quOverP = q / p * u;
  		var cs = Math.cos( quOverP );

  		position.x = radius * ( 2 + cs ) * 0.5 * cu;
  		position.y = radius * ( 2 + cs ) * su * 0.5;
  		position.z = radius * Math.sin( quOverP ) * 0.5;

  	}

  };

  TorusKnotBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  TorusKnotBufferGeometry.prototype.constructor = TorusKnotBufferGeometry;

  /**
   * @author oosmoxiecode
   */

  function TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q, heightScale ) {

  	Geometry.call( this );

  	this.type = 'TorusKnotGeometry';

  	this.parameters = {
  		radius: radius,
  		tube: tube,
  		tubularSegments: tubularSegments,
  		radialSegments: radialSegments,
  		p: p,
  		q: q
  	};

  	if( heightScale !== undefined ) console.warn( 'THREE.TorusKnotGeometry: heightScale has been deprecated. Use .scale( x, y, z ) instead.' );

  	this.fromBufferGeometry( new TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) );
  	this.mergeVertices();

  };

  TorusKnotGeometry.prototype = Object.create( Geometry.prototype );
  TorusKnotGeometry.prototype.constructor = TorusKnotGeometry;

  /**
   * @author Mugen87 / https://github.com/Mugen87
   */

  function TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) {

  	BufferGeometry.call( this );

  	this.type = 'TorusBufferGeometry';

  	this.parameters = {
  		radius: radius,
  		tube: tube,
  		radialSegments: radialSegments,
  		tubularSegments: tubularSegments,
  		arc: arc
  	};

  	radius = radius || 100;
  	tube = tube || 40;
  	radialSegments = Math.floor( radialSegments ) || 8;
  	tubularSegments = Math.floor( tubularSegments ) || 6;
  	arc = arc || Math.PI * 2;

  	// used to calculate buffer length
  	var vertexCount = ( ( radialSegments + 1 ) * ( tubularSegments + 1 ) );
  	var indexCount = radialSegments * tubularSegments * 2 * 3;

  	// buffers
  	var indices = new ( indexCount > 65535 ? Uint32Array : Uint16Array )( indexCount );
  	var vertices = new Float32Array( vertexCount * 3 );
  	var normals = new Float32Array( vertexCount * 3 );
  	var uvs = new Float32Array( vertexCount * 2 );

  	// offset variables
  	var vertexBufferOffset = 0;
  	var uvBufferOffset = 0;
  	var indexBufferOffset = 0;

  	// helper variables
  	var center = new Vector3();
  	var vertex = new Vector3();
  	var normal = new Vector3();

  	var j, i;

  	// generate vertices, normals and uvs

  	for ( j = 0; j <= radialSegments; j ++ ) {

  		for ( i = 0; i <= tubularSegments; i ++ ) {

  			var u = i / tubularSegments * arc;
  			var v = j / radialSegments * Math.PI * 2;

  			// vertex
  			vertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );
  			vertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );
  			vertex.z = tube * Math.sin( v );

  			vertices[ vertexBufferOffset ] = vertex.x;
  			vertices[ vertexBufferOffset + 1 ] = vertex.y;
  			vertices[ vertexBufferOffset + 2 ] = vertex.z;

  			// this vector is used to calculate the normal
  			center.x = radius * Math.cos( u );
  			center.y = radius * Math.sin( u );

  			// normal
  			normal.subVectors( vertex, center ).normalize();

  			normals[ vertexBufferOffset ] = normal.x;
  			normals[ vertexBufferOffset + 1 ] = normal.y;
  			normals[ vertexBufferOffset + 2 ] = normal.z;

  			// uv
  			uvs[ uvBufferOffset ] = i / tubularSegments;
  			uvs[ uvBufferOffset + 1 ] = j / radialSegments;

  			// update offsets
  			vertexBufferOffset += 3;
  			uvBufferOffset += 2;

  		}

  	}

  	// generate indices

  	for ( j = 1; j <= radialSegments; j ++ ) {

  		for ( i = 1; i <= tubularSegments; i ++ ) {

  			// indices
  			var a = ( tubularSegments + 1 ) * j + i - 1;
  			var b = ( tubularSegments + 1 ) * ( j - 1 ) + i - 1;
  			var c = ( tubularSegments + 1 ) * ( j - 1 ) + i;
  			var d = ( tubularSegments + 1 ) * j + i;

  			// face one
  			indices[ indexBufferOffset ] = a;
  			indices[ indexBufferOffset + 1 ] = b;
  			indices[ indexBufferOffset + 2 ] = d;

  			// face two
  			indices[ indexBufferOffset + 3 ] = b;
  			indices[ indexBufferOffset + 4 ] = c;
  			indices[ indexBufferOffset + 5 ] = d;

  			// update offset
  			indexBufferOffset += 6;

  		}

  	}

  	// build geometry
  	this.setIndex( new BufferAttribute( indices, 1 ) );
  	this.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );
  	this.addAttribute( 'normal', new BufferAttribute( normals, 3 ) );
  	this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ) );

  };

  TorusBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  TorusBufferGeometry.prototype.constructor = TorusBufferGeometry;

  /**
   * @author oosmoxiecode
   * @author mrdoob / http://mrdoob.com/
   * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3DLite/src/away3dlite/primitives/Torus.as?r=2888
   */

  function TorusGeometry( radius, tube, radialSegments, tubularSegments, arc ) {

  	Geometry.call( this );

  	this.type = 'TorusGeometry';

  	this.parameters = {
  		radius: radius,
  		tube: tube,
  		radialSegments: radialSegments,
  		tubularSegments: tubularSegments,
  		arc: arc
  	};

  	this.fromBufferGeometry( new TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) );

  };

  TorusGeometry.prototype = Object.create( Geometry.prototype );
  TorusGeometry.prototype.constructor = TorusGeometry;

  /**
   * @author zz85 / http://www.lab4games.net/zz85/blog
   * @author alteredq / http://alteredqualia.com/
   *
   * Text = 3D Text
   *
   * parameters = {
   *  font: <THREE.Font>, // font
   *
   *  size: <float>, // size of the text
   *  height: <float>, // thickness to extrude text
   *  curveSegments: <int>, // number of points on the curves
   *
   *  bevelEnabled: <bool>, // turn on bevel
   *  bevelThickness: <float>, // how deep into text bevel goes
   *  bevelSize: <float> // how far from text outline is bevel
   * }
   */

  function TextGeometry( text, parameters ) {

  	parameters = parameters || {};

  	var font = parameters.font;

  	if ( (font && font.isFont) === false ) {

  		console.error( 'THREE.TextGeometry: font parameter is not an instance of THREE.Font.' );
  		return new Geometry();

  	}

  	var shapes = font.generateShapes( text, parameters.size, parameters.curveSegments );

  	// translate parameters to ExtrudeGeometry API

  	parameters.amount = parameters.height !== undefined ? parameters.height : 50;

  	// defaults

  	if ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;
  	if ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;
  	if ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;

  	ExtrudeGeometry.call( this, shapes, parameters );

  	this.type = 'TextGeometry';

  };

  TextGeometry.prototype = Object.create( ExtrudeGeometry.prototype );
  TextGeometry.prototype.constructor = TextGeometry;

  /**
   * @author Mugen87 / https://github.com/Mugen87
   */

  function RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {

  	BufferGeometry.call( this );

  	this.type = 'RingBufferGeometry';

  	this.parameters = {
  		innerRadius: innerRadius,
  		outerRadius: outerRadius,
  		thetaSegments: thetaSegments,
  		phiSegments: phiSegments,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	innerRadius = innerRadius || 20;
  	outerRadius = outerRadius || 50;

  	thetaStart = thetaStart !== undefined ? thetaStart : 0;
  	thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

  	thetaSegments = thetaSegments !== undefined ? Math.max( 3, thetaSegments ) : 8;
  	phiSegments = phiSegments !== undefined ? Math.max( 1, phiSegments ) : 1;

  	// these are used to calculate buffer length
  	var vertexCount = ( thetaSegments + 1 ) * ( phiSegments + 1 );
  	var indexCount = thetaSegments * phiSegments * 2 * 3;

  	// buffers
  	var indices = new BufferAttribute( new ( indexCount > 65535 ? Uint32Array : Uint16Array )( indexCount ) , 1 );
  	var vertices = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var normals = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var uvs = new BufferAttribute( new Float32Array( vertexCount * 2 ), 2 );

  	// some helper variables
  	var index = 0, indexOffset = 0, segment;
  	var radius = innerRadius;
  	var radiusStep = ( ( outerRadius - innerRadius ) / phiSegments );
  	var vertex = new Vector3();
  	var uv = new Vector2();
  	var j, i;

  	// generate vertices, normals and uvs

  	// values are generate from the inside of the ring to the outside

  	for ( j = 0; j <= phiSegments; j ++ ) {

  		for ( i = 0; i <= thetaSegments; i ++ ) {

  			segment = thetaStart + i / thetaSegments * thetaLength;

  			// vertex
  			vertex.x = radius * Math.cos( segment );
  			vertex.y = radius * Math.sin( segment );
  			vertices.setXYZ( index, vertex.x, vertex.y, vertex.z );

  			// normal
  			normals.setXYZ( index, 0, 0, 1 );

  			// uv
  			uv.x = ( vertex.x / outerRadius + 1 ) / 2;
  			uv.y = ( vertex.y / outerRadius + 1 ) / 2;
  			uvs.setXY( index, uv.x, uv.y );

  			// increase index
  			index++;

  		}

  		// increase the radius for next row of vertices
  		radius += radiusStep;

  	}

  	// generate indices

  	for ( j = 0; j < phiSegments; j ++ ) {

  		var thetaSegmentLevel = j * ( thetaSegments + 1 );

  		for ( i = 0; i < thetaSegments; i ++ ) {

  			segment = i + thetaSegmentLevel;

  			// indices
  			var a = segment;
  			var b = segment + thetaSegments + 1;
  			var c = segment + thetaSegments + 2;
  			var d = segment + 1;

  			// face one
  			indices.setX( indexOffset, a ); indexOffset++;
  			indices.setX( indexOffset, b ); indexOffset++;
  			indices.setX( indexOffset, c ); indexOffset++;

  			// face two
  			indices.setX( indexOffset, a ); indexOffset++;
  			indices.setX( indexOffset, c ); indexOffset++;
  			indices.setX( indexOffset, d ); indexOffset++;

  		}

  	}

  	// build geometry

  	this.setIndex( indices );
  	this.addAttribute( 'position', vertices );
  	this.addAttribute( 'normal', normals );
  	this.addAttribute( 'uv', uvs );

  };

  RingBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  RingBufferGeometry.prototype.constructor = RingBufferGeometry;

  /**
   * @author Kaleb Murphy
   */

  function RingGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {

  	Geometry.call( this );

  	this.type = 'RingGeometry';

  	this.parameters = {
  		innerRadius: innerRadius,
  		outerRadius: outerRadius,
  		thetaSegments: thetaSegments,
  		phiSegments: phiSegments,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	this.fromBufferGeometry( new RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) );

  };

  RingGeometry.prototype = Object.create( Geometry.prototype );
  RingGeometry.prototype.constructor = RingGeometry;

  /**
   * @author mrdoob / http://mrdoob.com/
   * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as
   */

  function PlaneGeometry( width, height, widthSegments, heightSegments ) {

  	Geometry.call( this );

  	this.type = 'PlaneGeometry';

  	this.parameters = {
  		width: width,
  		height: height,
  		widthSegments: widthSegments,
  		heightSegments: heightSegments
  	};

  	this.fromBufferGeometry( new PlaneBufferGeometry( width, height, widthSegments, heightSegments ) );

  };

  PlaneGeometry.prototype = Object.create( Geometry.prototype );
  PlaneGeometry.prototype.constructor = PlaneGeometry;

  /**
   * @author Mugen87 / https://github.com/Mugen87
   */

   // points - to create a closed torus, one must use a set of points
   //    like so: [ a, b, c, d, a ], see first is the same as last.
   // segments - the number of circumference segments to create
   // phiStart - the starting radian
   // phiLength - the radian (0 to 2PI) range of the lathed section
   //    2PI is a closed lathe, less than 2PI is a portion.

  function LatheBufferGeometry( points, segments, phiStart, phiLength ) {

  	BufferGeometry.call( this );

  	this.type = 'LatheBufferGeometry';

  	this.parameters = {
  		points: points,
  		segments: segments,
  		phiStart: phiStart,
  		phiLength: phiLength
  	};

  	segments = Math.floor( segments ) || 12;
  	phiStart = phiStart || 0;
  	phiLength = phiLength || Math.PI * 2;

  	// clamp phiLength so it's in range of [ 0, 2PI ]
  	phiLength = exports.Math.clamp( phiLength, 0, Math.PI * 2 );

  	// these are used to calculate buffer length
  	var vertexCount = ( segments + 1 ) * points.length;
  	var indexCount = segments * points.length * 2 * 3;

  	// buffers
  	var indices = new BufferAttribute( new ( indexCount > 65535 ? Uint32Array : Uint16Array )( indexCount ) , 1 );
  	var vertices = new BufferAttribute( new Float32Array( vertexCount * 3 ), 3 );
  	var uvs = new BufferAttribute( new Float32Array( vertexCount * 2 ), 2 );

  	// helper variables
  	var index = 0, indexOffset = 0, base;
  	var inverseSegments = 1.0 / segments;
  	var vertex = new Vector3();
  	var uv = new Vector2();
  	var i, j;

  	// generate vertices and uvs

  	for ( i = 0; i <= segments; i ++ ) {

  		var phi = phiStart + i * inverseSegments * phiLength;

  		var sin = Math.sin( phi );
  		var cos = Math.cos( phi );

  		for ( j = 0; j <= ( points.length - 1 ); j ++ ) {

  			// vertex
  			vertex.x = points[ j ].x * sin;
  			vertex.y = points[ j ].y;
  			vertex.z = points[ j ].x * cos;
  			vertices.setXYZ( index, vertex.x, vertex.y, vertex.z );

  			// uv
  			uv.x = i / segments;
  			uv.y = j / ( points.length - 1 );
  			uvs.setXY( index, uv.x, uv.y );

  			// increase index
  			index ++;

  		}

  	}

  	// generate indices

  	for ( i = 0; i < segments; i ++ ) {

  		for ( j = 0; j < ( points.length - 1 ); j ++ ) {

  			base = j + i * points.length;

  			// indices
  			var a = base;
  			var b = base + points.length;
  			var c = base + points.length + 1;
  			var d = base + 1;

  			// face one
  			indices.setX( indexOffset, a ); indexOffset++;
  			indices.setX( indexOffset, b ); indexOffset++;
  			indices.setX( indexOffset, d ); indexOffset++;

  			// face two
  			indices.setX( indexOffset, b ); indexOffset++;
  			indices.setX( indexOffset, c ); indexOffset++;
  			indices.setX( indexOffset, d ); indexOffset++;

  		}

  	}

  	// build geometry

  	this.setIndex( indices );
  	this.addAttribute( 'position', vertices );
  	this.addAttribute( 'uv', uvs );

  	// generate normals

  	this.computeVertexNormals();

  	// if the geometry is closed, we need to average the normals along the seam.
  	// because the corresponding vertices are identical (but still have different UVs).

  	if( phiLength === Math.PI * 2 ) {

  		var normals = this.attributes.normal.array;
  		var n1 = new Vector3();
  		var n2 = new Vector3();
  		var n = new Vector3();

  		// this is the buffer offset for the last line of vertices
  		base = segments * points.length * 3;

  		for( i = 0, j = 0; i < points.length; i ++, j += 3 ) {

  			// select the normal of the vertex in the first line
  			n1.x = normals[ j + 0 ];
  			n1.y = normals[ j + 1 ];
  			n1.z = normals[ j + 2 ];

  			// select the normal of the vertex in the last line
  			n2.x = normals[ base + j + 0 ];
  			n2.y = normals[ base + j + 1 ];
  			n2.z = normals[ base + j + 2 ];

  			// average normals
  			n.addVectors( n1, n2 ).normalize();

  			// assign the new values to both normals
  			normals[ j + 0 ] = normals[ base + j + 0 ] = n.x;
  			normals[ j + 1 ] = normals[ base + j + 1 ] = n.y;
  			normals[ j + 2 ] = normals[ base + j + 2 ] = n.z;

  		} // next row

  	}

  };

  LatheBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  LatheBufferGeometry.prototype.constructor = LatheBufferGeometry;

  /**
   * @author astrodud / http://astrodud.isgreat.org/
   * @author zz85 / https://github.com/zz85
   * @author bhouston / http://clara.io
   */

  // points - to create a closed torus, one must use a set of points
  //    like so: [ a, b, c, d, a ], see first is the same as last.
  // segments - the number of circumference segments to create
  // phiStart - the starting radian
  // phiLength - the radian (0 to 2PI) range of the lathed section
  //    2PI is a closed lathe, less than 2PI is a portion.

  function LatheGeometry( points, segments, phiStart, phiLength ) {

  	Geometry.call( this );

  	this.type = 'LatheGeometry';

  	this.parameters = {
  		points: points,
  		segments: segments,
  		phiStart: phiStart,
  		phiLength: phiLength
  	};

  	this.fromBufferGeometry( new LatheBufferGeometry( points, segments, phiStart, phiLength ) );
  	this.mergeVertices();

  };

  LatheGeometry.prototype = Object.create( Geometry.prototype );
  LatheGeometry.prototype.constructor = LatheGeometry;

  /**
   * @author mrdoob / http://mrdoob.com/
   */

  function CylinderGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

  	Geometry.call( this );

  	this.type = 'CylinderGeometry';

  	this.parameters = {
  		radiusTop: radiusTop,
  		radiusBottom: radiusBottom,
  		height: height,
  		radialSegments: radialSegments,
  		heightSegments: heightSegments,
  		openEnded: openEnded,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	this.fromBufferGeometry( new CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) );
  	this.mergeVertices();

  };

  CylinderGeometry.prototype = Object.create( Geometry.prototype );
  CylinderGeometry.prototype.constructor = CylinderGeometry;

  /**
   * @author abelnation / http://github.com/abelnation
   */

  function ConeGeometry(
  	radius, height,
  	radialSegments, heightSegments,
  	openEnded, thetaStart, thetaLength ) {

  	CylinderGeometry.call( this,
  		0, radius, height,
  		radialSegments, heightSegments,
  		openEnded, thetaStart, thetaLength );

  	this.type = 'ConeGeometry';

  	this.parameters = {
  		radius: radius,
  		height: height,
  		radialSegments: radialSegments,
  		heightSegments: heightSegments,
  		openEnded: openEnded,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  };

  ConeGeometry.prototype = Object.create( CylinderGeometry.prototype );
  ConeGeometry.prototype.constructor = ConeGeometry;

  /*
   * @author: abelnation / http://github.com/abelnation
   */

  function ConeBufferGeometry(
  	radius, height,
  	radialSegments, heightSegments,
  	openEnded, thetaStart, thetaLength ) {

  	CylinderBufferGeometry.call( this,
  		0, radius, height,
  		radialSegments, heightSegments,
  		openEnded, thetaStart, thetaLength );

  	this.type = 'ConeBufferGeometry';

  	this.parameters = {
  		radius: radius,
  		height: height,
  		radialSegments: radialSegments,
  		heightSegments: heightSegments,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  };

  ConeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  ConeBufferGeometry.prototype.constructor = ConeBufferGeometry;

  /**
   * @author benaadams / https://twitter.com/ben_a_adams
   */

  function CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) {

  	BufferGeometry.call( this );

  	this.type = 'CircleBufferGeometry';

  	this.parameters = {
  		radius: radius,
  		segments: segments,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	radius = radius || 50;
  	segments = segments !== undefined ? Math.max( 3, segments ) : 8;

  	thetaStart = thetaStart !== undefined ? thetaStart : 0;
  	thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

  	var vertices = segments + 2;

  	var positions = new Float32Array( vertices * 3 );
  	var normals = new Float32Array( vertices * 3 );
  	var uvs = new Float32Array( vertices * 2 );

  	// center data is already zero, but need to set a few extras
  	normals[ 2 ] = 1.0;
  	uvs[ 0 ] = 0.5;
  	uvs[ 1 ] = 0.5;

  	for ( var s = 0, i = 3, ii = 2 ; s <= segments; s ++, i += 3, ii += 2 ) {

  		var segment = thetaStart + s / segments * thetaLength;

  		positions[ i ] = radius * Math.cos( segment );
  		positions[ i + 1 ] = radius * Math.sin( segment );

  		normals[ i + 2 ] = 1; // normal z

  		uvs[ ii ] = ( positions[ i ] / radius + 1 ) / 2;
  		uvs[ ii + 1 ] = ( positions[ i + 1 ] / radius + 1 ) / 2;

  	}

  	var indices = [];

  	for ( var i = 1; i <= segments; i ++ ) {

  		indices.push( i, i + 1, 0 );

  	}

  	this.setIndex( new BufferAttribute( new Uint16Array( indices ), 1 ) );
  	this.addAttribute( 'position', new BufferAttribute( positions, 3 ) );
  	this.addAttribute( 'normal', new BufferAttribute( normals, 3 ) );
  	this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ) );

  	this.boundingSphere = new Sphere( new Vector3(), radius );

  };

  CircleBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
  CircleBufferGeometry.prototype.constructor = CircleBufferGeometry;

  /**
   * @author hughes
   */

  function CircleGeometry( radius, segments, thetaStart, thetaLength ) {

  	Geometry.call( this );

  	this.type = 'CircleGeometry';

  	this.parameters = {
  		radius: radius,
  		segments: segments,
  		thetaStart: thetaStart,
  		thetaLength: thetaLength
  	};

  	this.fromBufferGeometry( new CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );

  };

  CircleGeometry.prototype = Object.create( Geometry.prototype );
  CircleGeometry.prototype.constructor = CircleGeometry;

  /**
   * @author zz85 https://github.com/zz85
   *
   * Centripetal CatmullRom Curve - which is useful for avoiding
   * cusps and self-intersections in non-uniform catmull rom curves.
   * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
   *
   * curve.type accepts centripetal(default), chordal and catmullrom
   * curve.tension is used for catmullrom which defaults to 0.5
   */

  exports.CatmullRomCurve3 = ( function() {

  	var
  		tmp = new Vector3(),
  		px = new CubicPoly(),
  		py = new CubicPoly(),
  		pz = new CubicPoly();

  	/*
  	Based on an optimized c++ solution in
  	 - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/
  	 - http://ideone.com/NoEbVM

  	This CubicPoly class could be used for reusing some variables and calculations,
  	but for three.js curve use, it could be possible inlined and flatten into a single function call
  	which can be placed in CurveUtils.
  	*/

  	function CubicPoly() {

  	}

  	/*
  	 * Compute coefficients for a cubic polynomial
  	 *   p(s) = c0 + c1*s + c2*s^2 + c3*s^3
  	 * such that
  	 *   p(0) = x0, p(1) = x1
  	 *  and
  	 *   p'(0) = t0, p'(1) = t1.
  	 */
  	CubicPoly.prototype.init = function( x0, x1, t0, t1 ) {

  		this.c0 = x0;
  		this.c1 = t0;
  		this.c2 = - 3 * x0 + 3 * x1 - 2 * t0 - t1;
  		this.c3 = 2 * x0 - 2 * x1 + t0 + t1;

  	};

  	CubicPoly.prototype.initNonuniformCatmullRom = function( x0, x1, x2, x3, dt0, dt1, dt2 ) {

  		// compute tangents when parameterized in [t1,t2]
  		var t1 = ( x1 - x0 ) / dt0 - ( x2 - x0 ) / ( dt0 + dt1 ) + ( x2 - x1 ) / dt1;
  		var t2 = ( x2 - x1 ) / dt1 - ( x3 - x1 ) / ( dt1 + dt2 ) + ( x3 - x2 ) / dt2;

  		// rescale tangents for parametrization in [0,1]
  		t1 *= dt1;
  		t2 *= dt1;

  		// initCubicPoly
  		this.init( x1, x2, t1, t2 );

  	};

  	// standard Catmull-Rom spline: interpolate between x1 and x2 with previous/following points x1/x4
  	CubicPoly.prototype.initCatmullRom = function( x0, x1, x2, x3, tension ) {

  		this.init( x1, x2, tension * ( x2 - x0 ), tension * ( x3 - x1 ) );

  	};

  	CubicPoly.prototype.calc = function( t ) {

  		var t2 = t * t;
  		var t3 = t2 * t;
  		return this.c0 + this.c1 * t + this.c2 * t2 + this.c3 * t3;

  	};

  	// Subclass Three.js curve
  	return Curve.create(

  		function ( p /* array of Vector3 */ ) {

  			this.points = p || [];
  			this.closed = false;

  		},

  		function ( t ) {

  			var points = this.points,
  				point, intPoint, weight, l;

  			l = points.length;

  			if ( l < 2 ) console.log( 'duh, you need at least 2 points' );

  			point = ( l - ( this.closed ? 0 : 1 ) ) * t;
  			intPoint = Math.floor( point );
  			weight = point - intPoint;

  			if ( this.closed ) {

  				intPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / points.length ) + 1 ) * points.length;

  			} else if ( weight === 0 && intPoint === l - 1 ) {

  				intPoint = l - 2;
  				weight = 1;

  			}

  			var p0, p1, p2, p3; // 4 points

  			if ( this.closed || intPoint > 0 ) {

  				p0 = points[ ( intPoint - 1 ) % l ];

  			} else {

  				// extrapolate first point
  				tmp.subVectors( points[ 0 ], points[ 1 ] ).add( points[ 0 ] );
  				p0 = tmp;

  			}

  			p1 = points[ intPoint % l ];
  			p2 = points[ ( intPoint + 1 ) % l ];

  			if ( this.closed || intPoint + 2 < l ) {

  				p3 = points[ ( intPoint + 2 ) % l ];

  			} else {

  				// extrapolate last point
  				tmp.subVectors( points[ l - 1 ], points[ l - 2 ] ).add( points[ l - 1 ] );
  				p3 = tmp;

  			}

  			if ( this.type === undefined || this.type === 'centripetal' || this.type === 'chordal' ) {

  				// init Centripetal / Chordal Catmull-Rom
  				var pow = this.type === 'chordal' ? 0.5 : 0.25;
  				var dt0 = Math.pow( p0.distanceToSquared( p1 ), pow );
  				var dt1 = Math.pow( p1.distanceToSquared( p2 ), pow );
  				var dt2 = Math.pow( p2.distanceToSquared( p3 ), pow );

  				// safety check for repeated points
  				if ( dt1 < 1e-4 ) dt1 = 1.0;
  				if ( dt0 < 1e-4 ) dt0 = dt1;
  				if ( dt2 < 1e-4 ) dt2 = dt1;

  				px.initNonuniformCatmullRom( p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2 );
  				py.initNonuniformCatmullRom( p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2 );
  				pz.initNonuniformCatmullRom( p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2 );

  			} else if ( this.type === 'catmullrom' ) {

  				var tension = this.tension !== undefined ? this.tension : 0.5;
  				px.initCatmullRom( p0.x, p1.x, p2.x, p3.x, tension );
  				py.initCatmullRom( p0.y, p1.y, p2.y, p3.y, tension );
  				pz.initCatmullRom( p0.z, p1.z, p2.z, p3.z, tension );

  			}

  			var v = new Vector3(
  				px.calc( weight ),
  				py.calc( weight ),
  				pz.calc( weight )
  			);

  			return v;

  		}

  	);

  } )();

  /**************************************************************
   *	Closed Spline 3D curve
   **************************************************************/


  function ClosedSplineCurve3( points ) {

  	console.warn( 'THREE.ClosedSplineCurve3 has been deprecated. Please use THREE.CatmullRomCurve3.' );

  	exports.CatmullRomCurve3.call( this, points );
  	this.type = 'catmullrom';
  	this.closed = true;

  };

  ClosedSplineCurve3.prototype = Object.create( exports.CatmullRomCurve3.prototype );

  /**************************************************************
   *	Spline 3D curve
   **************************************************************/


  var SplineCurve3 = Curve.create(

  	function ( points /* array of Vector3 */ ) {

  		console.warn( 'THREE.SplineCurve3 will be deprecated. Please use THREE.CatmullRomCurve3' );
  		this.points = ( points == undefined ) ? [] : points;

  	},

  	function ( t ) {

  		var points = this.points;
  		var point = ( points.length - 1 ) * t;

  		var intPoint = Math.floor( point );
  		var weight = point - intPoint;

  		var point0 = points[ intPoint == 0 ? intPoint : intPoint - 1 ];
  		var point1 = points[ intPoint ];
  		var point2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];
  		var point3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];

  		var interpolate = exports.CurveUtils.interpolate;

  		return new Vector3(
  			interpolate( point0.x, point1.x, point2.x, point3.x, weight ),
  			interpolate( point0.y, point1.y, point2.y, point3.y, weight ),
  			interpolate( point0.z, point1.z, point2.z, point3.z, weight )
  		);

  	}

  );

  /**************************************************************
   *	Cubic Bezier 3D curve
   **************************************************************/

  exports.CubicBezierCurve3 = Curve.create(

  	function ( v0, v1, v2, v3 ) {

  		this.v0 = v0;
  		this.v1 = v1;
  		this.v2 = v2;
  		this.v3 = v3;

  	},

  	function ( t ) {

  		var b3 = exports.ShapeUtils.b3;

  		return new Vector3(
  			b3( t, this.v0.x, this.v1.x, this.v2.x, this.v3.x ),
  			b3( t, this.v0.y, this.v1.y, this.v2.y, this.v3.y ),
  			b3( t, this.v0.z, this.v1.z, this.v2.z, this.v3.z )
  		);

  	}

  );

  /**************************************************************
   *	Quadratic Bezier 3D curve
   **************************************************************/

  exports.QuadraticBezierCurve3 = Curve.create(

  	function ( v0, v1, v2 ) {

  		this.v0 = v0;
  		this.v1 = v1;
  		this.v2 = v2;

  	},

  	function ( t ) {

  		var b2 = exports.ShapeUtils.b2;		

  		return new Vector3(
  			b2( t, this.v0.x, this.v1.x, this.v2.x ),
  			b2( t, this.v0.y, this.v1.y, this.v2.y ),
  			b2( t, this.v0.z, this.v1.z, this.v2.z )
  		);

  	}

  );

  /**************************************************************
   *	Line3D
   **************************************************************/

  exports.LineCurve3 = Curve.create(

  	function ( v1, v2 ) {

  		this.v1 = v1;
  		this.v2 = v2;

  	},

  	function ( t ) {

  		if ( t === 1 ) {

  			return this.v2.clone();

  		}

  		var vector = new Vector3();

  		vector.subVectors( this.v2, this.v1 ); // diff
  		vector.multiplyScalar( t );
  		vector.add( this.v1 );

  		return vector;

  	}

  );

  /**************************************************************
   *	Arc curve
   **************************************************************/

  function ArcCurve( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

  	EllipseCurve.call( this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );

  };

  ArcCurve.prototype = Object.create( EllipseCurve.prototype );
  ArcCurve.prototype.constructor = ArcCurve;

  /**
   * @author alteredq / http://alteredqualia.com/
   */

  exports.SceneUtils = {

  	createMultiMaterialObject: function ( geometry, materials ) {

  		var group = new Group();

  		for ( var i = 0, l = materials.length; i < l; i ++ ) {

  			group.add( new Mesh( geometry, materials[ i ] ) );

  		}

  		return group;

  	},

  	detach: function ( child, parent, scene ) {

  		child.applyMatrix( parent.matrixWorld );
  		parent.remove( child );
  		scene.add( child );

  	},

  	attach: function ( child, scene, parent ) {

  		var matrixWorldInverse = new Matrix4();
  		matrixWorldInverse.getInverse( parent.matrixWorld );
  		child.applyMatrix( matrixWorldInverse );

  		scene.remove( child );
  		parent.add( child );

  	}

  };

  Object.defineProperty( exports, 'AudioContext', {
  	get: function () {
  		return exports.getAudioContext();
  	}
  });

  exports.SpritePlugin = SpritePlugin;
  exports.LensFlarePlugin = LensFlarePlugin;
  exports.WebGLTextures = WebGLTextures;
  exports.WebGLStencilBuffer = WebGLStencilBuffer;
  exports.WebGLDepthBuffer = WebGLDepthBuffer;
  exports.WebGLColorBuffer = WebGLColorBuffer;
  exports.WebGLState = WebGLState;
  exports.WebGLShadowMap = WebGLShadowMap;
  exports.WebGLProperties = WebGLProperties;
  exports.WebGLPrograms = WebGLPrograms;
  exports.WebGLObjects = WebGLObjects;
  exports.WebGLLights = WebGLLights;
  exports.WebGLGeometries = WebGLGeometries;
  exports.WebGLCapabilities = WebGLCapabilities;
  exports.WebGLExtensions = WebGLExtensions;
  exports.WebGLIndexedBufferRenderer = WebGLIndexedBufferRenderer;
  exports.WebGLClipping = WebGLClipping;
  exports.WebGLBufferRenderer = WebGLBufferRenderer;
  exports.WebGLRenderTargetCube = WebGLRenderTargetCube;
  exports.WebGLRenderTarget = WebGLRenderTarget;
  exports.WebGLRenderer = WebGLRenderer;
  exports.ShaderChunk = ShaderChunk;
  exports.FogExp2 = FogExp2;
  exports.Fog = Fog;
  exports.Scene = Scene;
  exports.LensFlare = LensFlare;
  exports.Sprite = Sprite;
  exports.LOD = LOD;
  exports.SkinnedMesh = SkinnedMesh;
  exports.Skeleton = Skeleton;
  exports.Bone = Bone;
  exports.Mesh = Mesh;
  exports.LineSegments = LineSegments;
  exports.Line = Line;
  exports.Points = Points;
  exports.Group = Group;
  exports.VideoTexture = VideoTexture;
  exports.DataTexture = DataTexture;
  exports.CompressedTexture = CompressedTexture;
  exports.CubeTexture = CubeTexture;
  exports.CanvasTexture = CanvasTexture;
  exports.DepthTexture = DepthTexture;
  exports.TextureIdCount = TextureIdCount;
  exports.Texture = Texture;
  exports.ShadowMaterial = ShadowMaterial;
  exports.SpriteMaterial = SpriteMaterial;
  exports.RawShaderMaterial = RawShaderMaterial;
  exports.ShaderMaterial = ShaderMaterial;
  exports.PointsMaterial = PointsMaterial;
  exports.MultiMaterial = MultiMaterial;
  exports.MeshPhysicalMaterial = MeshPhysicalMaterial;
  exports.MeshStandardMaterial = MeshStandardMaterial;
  exports.MeshPhongMaterial = MeshPhongMaterial;
  exports.MeshNormalMaterial = MeshNormalMaterial;
  exports.MeshLambertMaterial = MeshLambertMaterial;
  exports.MeshDepthMaterial = MeshDepthMaterial;
  exports.MeshBasicMaterial = MeshBasicMaterial;
  exports.LineDashedMaterial = LineDashedMaterial;
  exports.LineBasicMaterial = LineBasicMaterial;
  exports.MaterialIdCount = MaterialIdCount;
  exports.Material = Material;
  exports.CompressedTextureLoader = CompressedTextureLoader;
  exports.BinaryTextureLoader = BinaryTextureLoader;
  exports.DataTextureLoader = DataTextureLoader;
  exports.CubeTextureLoader = CubeTextureLoader;
  exports.TextureLoader = TextureLoader;
  exports.ObjectLoader = ObjectLoader;
  exports.MaterialLoader = MaterialLoader;
  exports.BufferGeometryLoader = BufferGeometryLoader;
  exports.LoadingManager = LoadingManager;
  exports.JSONLoader = JSONLoader;
  exports.ImageLoader = ImageLoader;
  exports.FontLoader = FontLoader;
  exports.XHRLoader = XHRLoader;
  exports.Loader = Loader;
  exports.AudioLoader = AudioLoader;
  exports.SpotLightShadow = SpotLightShadow;
  exports.SpotLight = SpotLight;
  exports.PointLight = PointLight;
  exports.HemisphereLight = HemisphereLight;
  exports.DirectionalLightShadow = DirectionalLightShadow;
  exports.DirectionalLight = DirectionalLight;
  exports.AmbientLight = AmbientLight;
  exports.LightShadow = LightShadow;
  exports.Light = Light;
  exports.StereoCamera = StereoCamera;
  exports.PerspectiveCamera = PerspectiveCamera;
  exports.OrthographicCamera = OrthographicCamera;
  exports.CubeCamera = CubeCamera;
  exports.Camera = Camera;
  exports.AudioListener = AudioListener;
  exports.PositionalAudio = PositionalAudio;
  exports.getAudioContext = getAudioContext;
  exports.AudioAnalyser = AudioAnalyser;
  exports.Audio = Audio;
  exports.VectorKeyframeTrack = VectorKeyframeTrack;
  exports.StringKeyframeTrack = StringKeyframeTrack;
  exports.QuaternionKeyframeTrack = QuaternionKeyframeTrack;
  exports.NumberKeyframeTrack = NumberKeyframeTrack;
  exports.ColorKeyframeTrack = ColorKeyframeTrack;
  exports.BooleanKeyframeTrack = BooleanKeyframeTrack;
  exports.PropertyMixer = PropertyMixer;
  exports.PropertyBinding = PropertyBinding;
  exports.KeyframeTrack = KeyframeTrack;
  exports.AnimationObjectGroup = AnimationObjectGroup;
  exports.AnimationMixer = AnimationMixer;
  exports.AnimationClip = AnimationClip;
  exports.AnimationAction = AnimationAction;
  exports.Uniform = Uniform;
  exports.InstancedBufferGeometry = InstancedBufferGeometry;
  exports.BufferGeometry = BufferGeometry;
  exports.DirectGeometry = DirectGeometry;
  exports.GeometryIdCount = GeometryIdCount;
  exports.Geometry = Geometry;
  exports.InterleavedBufferAttribute = InterleavedBufferAttribute;
  exports.InstancedInterleavedBuffer = InstancedInterleavedBuffer;
  exports.InterleavedBuffer = InterleavedBuffer;
  exports.InstancedBufferAttribute = InstancedBufferAttribute;
  exports.DynamicBufferAttribute = DynamicBufferAttribute;
  exports.Float64Attribute = Float64Attribute;
  exports.Float32Attribute = Float32Attribute;
  exports.Uint32Attribute = Uint32Attribute;
  exports.Int32Attribute = Int32Attribute;
  exports.Uint16Attribute = Uint16Attribute;
  exports.Int16Attribute = Int16Attribute;
  exports.Uint8ClampedAttribute = Uint8ClampedAttribute;
  exports.Uint8Attribute = Uint8Attribute;
  exports.Int8Attribute = Int8Attribute;
  exports.BufferAttribute = BufferAttribute;
  exports.Face3 = Face3;
  exports.Object3DIdCount = Object3DIdCount;
  exports.Object3D = Object3D;
  exports.Raycaster = Raycaster;
  exports.Layers = Layers;
  exports.EventDispatcher = EventDispatcher;
  exports.Clock = Clock;
  exports.QuaternionLinearInterpolant = QuaternionLinearInterpolant;
  exports.LinearInterpolant = LinearInterpolant;
  exports.DiscreteInterpolant = DiscreteInterpolant;
  exports.CubicInterpolant = CubicInterpolant;
  exports.Interpolant = Interpolant;
  exports.Triangle = Triangle;
  exports.Spline = Spline;
  exports.Spherical = Spherical;
  exports.Plane = Plane;
  exports.Frustum = Frustum;
  exports.Sphere = Sphere;
  exports.Ray = Ray;
  exports.Matrix4 = Matrix4;
  exports.Matrix3 = Matrix3;
  exports.Box3 = Box3;
  exports.Box2 = Box2;
  exports.Line3 = Line3;
  exports.Euler = Euler;
  exports.Vector4 = Vector4;
  exports.Vector3 = Vector3;
  exports.Vector2 = Vector2;
  exports.Quaternion = Quaternion;
  exports.Color = Color;
  exports.MorphBlendMesh = MorphBlendMesh;
  exports.ImmediateRenderObject = ImmediateRenderObject;
  exports.WireframeHelper = WireframeHelper;
  exports.VertexNormalsHelper = VertexNormalsHelper;
  exports.SpotLightHelper = SpotLightHelper;
  exports.SkeletonHelper = SkeletonHelper;
  exports.PointLightHelper = PointLightHelper;
  exports.HemisphereLightHelper = HemisphereLightHelper;
  exports.GridHelper = GridHelper;
  exports.FaceNormalsHelper = FaceNormalsHelper;
  exports.EdgesHelper = EdgesHelper;
  exports.DirectionalLightHelper = DirectionalLightHelper;
  exports.CameraHelper = CameraHelper;
  exports.BoundingBoxHelper = BoundingBoxHelper;
  exports.BoxHelper = BoxHelper;
  exports.AxisHelper = AxisHelper;
  exports.WireframeGeometry = WireframeGeometry;
  exports.ParametricGeometry = ParametricGeometry;
  exports.TetrahedronGeometry = TetrahedronGeometry;
  exports.OctahedronGeometry = OctahedronGeometry;
  exports.IcosahedronGeometry = IcosahedronGeometry;
  exports.DodecahedronGeometry = DodecahedronGeometry;
  exports.PolyhedronGeometry = PolyhedronGeometry;
  exports.TubeGeometry = TubeGeometry;
  exports.TorusKnotGeometry = TorusKnotGeometry;
  exports.TorusKnotBufferGeometry = TorusKnotBufferGeometry;
  exports.TorusGeometry = TorusGeometry;
  exports.TorusBufferGeometry = TorusBufferGeometry;
  exports.TextGeometry = TextGeometry;
  exports.SphereBufferGeometry = SphereBufferGeometry;
  exports.SphereGeometry = SphereGeometry;
  exports.RingGeometry = RingGeometry;
  exports.RingBufferGeometry = RingBufferGeometry;
  exports.PlaneBufferGeometry = PlaneBufferGeometry;
  exports.PlaneGeometry = PlaneGeometry;
  exports.LatheGeometry = LatheGeometry;
  exports.LatheBufferGeometry = LatheBufferGeometry;
  exports.ShapeGeometry = ShapeGeometry;
  exports.ExtrudeGeometry = ExtrudeGeometry;
  exports.EdgesGeometry = EdgesGeometry;
  exports.ConeGeometry = ConeGeometry;
  exports.ConeBufferGeometry = ConeBufferGeometry;
  exports.CylinderGeometry = CylinderGeometry;
  exports.CylinderBufferGeometry = CylinderBufferGeometry;
  exports.CircleBufferGeometry = CircleBufferGeometry;
  exports.CircleGeometry = CircleGeometry;
  exports.BoxBufferGeometry = BoxBufferGeometry;
  exports.BoxGeometry = BoxGeometry;
  exports.ClosedSplineCurve3 = ClosedSplineCurve3;
  exports.SplineCurve3 = SplineCurve3;
  exports.ArcCurve = ArcCurve;
  exports.EllipseCurve = EllipseCurve;
  exports.SplineCurve = SplineCurve;
  exports.CubicBezierCurve = CubicBezierCurve;
  exports.QuadraticBezierCurve = QuadraticBezierCurve;
  exports.LineCurve = LineCurve;
  exports.Shape = Shape;
  exports.ShapePath = ShapePath;
  exports.Path = Path;
  exports.Font = Font;
  exports.CurvePath = CurvePath;
  exports.Curve = Curve;
  exports.MOUSE = MOUSE;
  exports.CullFaceNone = CullFaceNone;
  exports.CullFaceBack = CullFaceBack;
  exports.CullFaceFront = CullFaceFront;
  exports.CullFaceFrontBack = CullFaceFrontBack;
  exports.FrontFaceDirectionCW = FrontFaceDirectionCW;
  exports.FrontFaceDirectionCCW = FrontFaceDirectionCCW;
  exports.BasicShadowMap = BasicShadowMap;
  exports.PCFShadowMap = PCFShadowMap;
  exports.PCFSoftShadowMap = PCFSoftShadowMap;
  exports.FrontSide = FrontSide;
  exports.BackSide = BackSide;
  exports.DoubleSide = DoubleSide;
  exports.FlatShading = FlatShading;
  exports.SmoothShading = SmoothShading;
  exports.NoColors = NoColors;
  exports.FaceColors = FaceColors;
  exports.VertexColors = VertexColors;
  exports.NoBlending = NoBlending;
  exports.NormalBlending = NormalBlending;
  exports.AdditiveBlending = AdditiveBlending;
  exports.SubtractiveBlending = SubtractiveBlending;
  exports.MultiplyBlending = MultiplyBlending;
  exports.CustomBlending = CustomBlending;
  exports.AddEquation = AddEquation;
  exports.SubtractEquation = SubtractEquation;
  exports.ReverseSubtractEquation = ReverseSubtractEquation;
  exports.MinEquation = MinEquation;
  exports.MaxEquation = MaxEquation;
  exports.ZeroFactor = ZeroFactor;
  exports.OneFactor = OneFactor;
  exports.SrcColorFactor = SrcColorFactor;
  exports.OneMinusSrcColorFactor = OneMinusSrcColorFactor;
  exports.SrcAlphaFactor = SrcAlphaFactor;
  exports.OneMinusSrcAlphaFactor = OneMinusSrcAlphaFactor;
  exports.DstAlphaFactor = DstAlphaFactor;
  exports.OneMinusDstAlphaFactor = OneMinusDstAlphaFactor;
  exports.DstColorFactor = DstColorFactor;
  exports.OneMinusDstColorFactor = OneMinusDstColorFactor;
  exports.SrcAlphaSaturateFactor = SrcAlphaSaturateFactor;
  exports.NeverDepth = NeverDepth;
  exports.AlwaysDepth = AlwaysDepth;
  exports.LessDepth = LessDepth;
  exports.LessEqualDepth = LessEqualDepth;
  exports.EqualDepth = EqualDepth;
  exports.GreaterEqualDepth = GreaterEqualDepth;
  exports.GreaterDepth = GreaterDepth;
  exports.NotEqualDepth = NotEqualDepth;
  exports.MultiplyOperation = MultiplyOperation;
  exports.MixOperation = MixOperation;
  exports.AddOperation = AddOperation;
  exports.NoToneMapping = NoToneMapping;
  exports.LinearToneMapping = LinearToneMapping;
  exports.ReinhardToneMapping = ReinhardToneMapping;
  exports.Uncharted2ToneMapping = Uncharted2ToneMapping;
  exports.CineonToneMapping = CineonToneMapping;
  exports.UVMapping = UVMapping;
  exports.CubeReflectionMapping = CubeReflectionMapping;
  exports.CubeRefractionMapping = CubeRefractionMapping;
  exports.EquirectangularReflectionMapping = EquirectangularReflectionMapping;
  exports.EquirectangularRefractionMapping = EquirectangularRefractionMapping;
  exports.SphericalReflectionMapping = SphericalReflectionMapping;
  exports.CubeUVReflectionMapping = CubeUVReflectionMapping;
  exports.CubeUVRefractionMapping = CubeUVRefractionMapping;
  exports.RepeatWrapping = RepeatWrapping;
  exports.ClampToEdgeWrapping = ClampToEdgeWrapping;
  exports.MirroredRepeatWrapping = MirroredRepeatWrapping;
  exports.NearestFilter = NearestFilter;
  exports.NearestMipMapNearestFilter = NearestMipMapNearestFilter;
  exports.NearestMipMapLinearFilter = NearestMipMapLinearFilter;
  exports.LinearFilter = LinearFilter;
  exports.LinearMipMapNearestFilter = LinearMipMapNearestFilter;
  exports.LinearMipMapLinearFilter = LinearMipMapLinearFilter;
  exports.UnsignedByteType = UnsignedByteType;
  exports.ByteType = ByteType;
  exports.ShortType = ShortType;
  exports.UnsignedShortType = UnsignedShortType;
  exports.IntType = IntType;
  exports.UnsignedIntType = UnsignedIntType;
  exports.FloatType = FloatType;
  exports.HalfFloatType = HalfFloatType;
  exports.UnsignedShort4444Type = UnsignedShort4444Type;
  exports.UnsignedShort5551Type = UnsignedShort5551Type;
  exports.UnsignedShort565Type = UnsignedShort565Type;
  exports.AlphaFormat = AlphaFormat;
  exports.RGBFormat = RGBFormat;
  exports.RGBAFormat = RGBAFormat;
  exports.LuminanceFormat = LuminanceFormat;
  exports.LuminanceAlphaFormat = LuminanceAlphaFormat;
  exports.RGBEFormat = RGBEFormat;
  exports.DepthFormat = DepthFormat;
  exports.RGB_S3TC_DXT1_Format = RGB_S3TC_DXT1_Format;
  exports.RGBA_S3TC_DXT1_Format = RGBA_S3TC_DXT1_Format;
  exports.RGBA_S3TC_DXT3_Format = RGBA_S3TC_DXT3_Format;
  exports.RGBA_S3TC_DXT5_Format = RGBA_S3TC_DXT5_Format;
  exports.RGB_PVRTC_4BPPV1_Format = RGB_PVRTC_4BPPV1_Format;
  exports.RGB_PVRTC_2BPPV1_Format = RGB_PVRTC_2BPPV1_Format;
  exports.RGBA_PVRTC_4BPPV1_Format = RGBA_PVRTC_4BPPV1_Format;
  exports.RGBA_PVRTC_2BPPV1_Format = RGBA_PVRTC_2BPPV1_Format;
  exports.RGB_ETC1_Format = RGB_ETC1_Format;
  exports.LoopOnce = LoopOnce;
  exports.LoopRepeat = LoopRepeat;
  exports.LoopPingPong = LoopPingPong;
  exports.InterpolateDiscrete = InterpolateDiscrete;
  exports.InterpolateLinear = InterpolateLinear;
  exports.InterpolateSmooth = InterpolateSmooth;
  exports.ZeroCurvatureEnding = ZeroCurvatureEnding;
  exports.ZeroSlopeEnding = ZeroSlopeEnding;
  exports.WrapAroundEnding = WrapAroundEnding;
  exports.TrianglesDrawMode = TrianglesDrawMode;
  exports.TriangleStripDrawMode = TriangleStripDrawMode;
  exports.TriangleFanDrawMode = TriangleFanDrawMode;
  exports.LinearEncoding = LinearEncoding;
  exports.sRGBEncoding = sRGBEncoding;
  exports.GammaEncoding = GammaEncoding;
  exports.RGBEEncoding = RGBEEncoding;
  exports.LogLuvEncoding = LogLuvEncoding;
  exports.RGBM7Encoding = RGBM7Encoding;
  exports.RGBM16Encoding = RGBM16Encoding;
  exports.RGBDEncoding = RGBDEncoding;
  exports.BasicDepthPacking = BasicDepthPacking;
  exports.RGBADepthPacking = RGBADepthPacking;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
/**
 * @author mrdoob / http://mrdoob.com/
 */

Object.assign( THREE, {
	Face4: function ( a, b, c, d, normal, color, materialIndex ) {
		console.warn( 'THREE.Face4 has been removed. A THREE.Face3 will be created instead.' );
		return new THREE.Face3( a, b, c, normal, color, materialIndex );
	},
	LineStrip: 0,
	LinePieces: 1,
	MeshFaceMaterial: THREE.MultiMaterial,
	PointCloud: function ( geometry, material ) {
		console.warn( 'THREE.PointCloud has been renamed to THREE.Points.' );
		return new THREE.Points( geometry, material );
	},
	Particle: THREE.Sprite,
	ParticleSystem: function ( geometry, material ) {
		console.warn( 'THREE.ParticleSystem has been renamed to THREE.Points.' );
		return new THREE.Points( geometry, material );
	},
	PointCloudMaterial: function ( parameters ) {
		console.warn( 'THREE.PointCloudMaterial has been renamed to THREE.PointsMaterial.' );
		return new THREE.PointsMaterial( parameters );
	},
	ParticleBasicMaterial: function ( parameters ) {
		console.warn( 'THREE.ParticleBasicMaterial has been renamed to THREE.PointsMaterial.' );
		return new THREE.PointsMaterial( parameters );
	},
	ParticleSystemMaterial: function ( parameters ) {
		console.warn( 'THREE.ParticleSystemMaterial has been renamed to THREE.PointsMaterial.' );
		return new THREE.PointsMaterial( parameters );
	},
	Vertex: function ( x, y, z ) {
		console.warn( 'THREE.Vertex has been removed. Use THREE.Vector3 instead.' );
		return new THREE.Vector3( x, y, z );
	}
} );

//

Object.assign( THREE.Box2.prototype, {
	empty: function () {
		console.warn( 'THREE.Box2: .empty() has been renamed to .isEmpty().' );
		return this.isEmpty();
	},
	isIntersectionBox: function ( box ) {
		console.warn( 'THREE.Box2: .isIntersectionBox() has been renamed to .intersectsBox().' );
		return this.intersectsBox( box );
	}
} );

Object.assign( THREE.Box3.prototype, {
	empty: function () {
		console.warn( 'THREE.Box3: .empty() has been renamed to .isEmpty().' );
		return this.isEmpty();
	},
	isIntersectionBox: function ( box ) {
		console.warn( 'THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().' );
		return this.intersectsBox( box );
	},
	isIntersectionSphere: function ( sphere ) {
		console.warn( 'THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().' );
		return this.intersectsSphere( sphere );
	}
} );

Object.assign( THREE.Matrix3.prototype, {
	multiplyVector3: function ( vector ) {
		console.warn( 'THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.' );
		return vector.applyMatrix3( this );
	},
	multiplyVector3Array: function ( a ) {
		console.warn( 'THREE.Matrix3: .multiplyVector3Array() has been renamed. Use matrix.applyToVector3Array( array ) instead.' );
		return this.applyToVector3Array( a );
	}
} );

Object.assign( THREE.Matrix4.prototype, {
	extractPosition: function ( m ) {
		console.warn( 'THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().' );
		return this.copyPosition( m );
	},
	setRotationFromQuaternion: function ( q ) {
		console.warn( 'THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().' );
		return this.makeRotationFromQuaternion( q );
	},
	multiplyVector3: function ( vector ) {
		console.warn( 'THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) or vector.applyProjection( matrix ) instead.' );
		return vector.applyProjection( this );
	},
	multiplyVector4: function ( vector ) {
		console.warn( 'THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
		return vector.applyMatrix4( this );
	},
	multiplyVector3Array: function ( a ) {
		console.warn( 'THREE.Matrix4: .multiplyVector3Array() has been renamed. Use matrix.applyToVector3Array( array ) instead.' );
		return this.applyToVector3Array( a );
	},
	rotateAxis: function ( v ) {
		console.warn( 'THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.' );
		v.transformDirection( this );
	},
	crossVector: function ( vector ) {
		console.warn( 'THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.' );
		return vector.applyMatrix4( this );
	},
	translate: function ( v ) {
		console.error( 'THREE.Matrix4: .translate() has been removed.' );
	},
	rotateX: function ( angle ) {
		console.error( 'THREE.Matrix4: .rotateX() has been removed.' );
	},
	rotateY: function ( angle ) {
		console.error( 'THREE.Matrix4: .rotateY() has been removed.' );
	},
	rotateZ: function ( angle ) {
		console.error( 'THREE.Matrix4: .rotateZ() has been removed.' );
	},
	rotateByAxis: function ( axis, angle ) {
		console.error( 'THREE.Matrix4: .rotateByAxis() has been removed.' );
	}
} );

Object.assign( THREE.Plane.prototype, {
	isIntersectionLine: function ( line ) {
		console.warn( 'THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().' );
		return this.intersectsLine( line );
	}
} );

Object.assign( THREE.Quaternion.prototype, {
	multiplyVector3: function ( vector ) {
		console.warn( 'THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.' );
		return vector.applyQuaternion( this );
	}
} );

Object.assign( THREE.Ray.prototype, {
	isIntersectionBox: function ( box ) {
		console.warn( 'THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().' );
		return this.intersectsBox( box );
	},
	isIntersectionPlane: function ( plane ) {
		console.warn( 'THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().' );
		return this.intersectsPlane( plane );
	},
	isIntersectionSphere: function ( sphere ) {
		console.warn( 'THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().' );
		return this.intersectsSphere( sphere );
	}
} );

Object.assign( THREE.Vector3.prototype, {
	setEulerFromRotationMatrix: function () {
		console.error( 'THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.' );
	},
	setEulerFromQuaternion: function () {
		console.error( 'THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.' );
	},
	getPositionFromMatrix: function ( m ) {
		console.warn( 'THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().' );
		return this.setFromMatrixPosition( m );
	},
	getScaleFromMatrix: function ( m ) {
		console.warn( 'THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().' );
		return this.setFromMatrixScale( m );
	},
	getColumnFromMatrix: function ( index, matrix ) {
		console.warn( 'THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().' );
		return this.setFromMatrixColumn( matrix, index );
	}
} );

//

Object.assign( THREE.Object3D.prototype, {
	getChildByName: function ( name ) {
		console.warn( 'THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().' );
		return this.getObjectByName( name );
	},
	renderDepth: function ( value ) {
		console.warn( 'THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.' );
	},
	translate: function ( distance, axis ) {
		console.warn( 'THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.' );
		return this.translateOnAxis( axis, distance );
	}
} );

Object.defineProperties( THREE.Object3D.prototype, {
	eulerOrder: {
		get: function () {
			console.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );
			return this.rotation.order;
		},
		set: function ( value ) {
			console.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );
			this.rotation.order = value;
		}
	},
	useQuaternion: {
		get: function () {
			console.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );
		},
		set: function ( value ) {
			console.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );
		}
	}
} );

Object.defineProperties( THREE.LOD.prototype, {
	objects: {
		get: function () {
			console.warn( 'THREE.LOD: .objects has been renamed to .levels.' );
			return this.levels;
		}
	}
} );

//

THREE.PerspectiveCamera.prototype.setLens = function ( focalLength, filmGauge ) {

	console.warn( "THREE.PerspectiveCamera.setLens is deprecated. " +
			"Use .setFocalLength and .filmGauge for a photographic setup." );

	if ( filmGauge !== undefined ) this.filmGauge = filmGauge;
	this.setFocalLength( focalLength );

};

//

Object.defineProperties( THREE.Light.prototype, {
	onlyShadow: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .onlyShadow has been removed.' );
		}
	},
	shadowCameraFov: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraFov is now .shadow.camera.fov.' );
			this.shadow.camera.fov = value;
		}
	},
	shadowCameraLeft: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraLeft is now .shadow.camera.left.' );
			this.shadow.camera.left = value;
		}
	},
	shadowCameraRight: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraRight is now .shadow.camera.right.' );
			this.shadow.camera.right = value;
		}
	},
	shadowCameraTop: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraTop is now .shadow.camera.top.' );
			this.shadow.camera.top = value;
		}
	},
	shadowCameraBottom: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.' );
			this.shadow.camera.bottom = value;
		}
	},
	shadowCameraNear: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraNear is now .shadow.camera.near.' );
			this.shadow.camera.near = value;
		}
	},
	shadowCameraFar: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraFar is now .shadow.camera.far.' );
			this.shadow.camera.far = value;
		}
	},
	shadowCameraVisible: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.' );
		}
	},
	shadowBias: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowBias is now .shadow.bias.' );
			this.shadow.bias = value;
		}
	},
	shadowDarkness: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowDarkness has been removed.' );
		}
	},
	shadowMapWidth: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.' );
			this.shadow.mapSize.width = value;
		}
	},
	shadowMapHeight: {
		set: function ( value ) {
			console.warn( 'THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.' );
			this.shadow.mapSize.height = value;
		}
	}
} );

//

Object.defineProperties( THREE.BufferAttribute.prototype, {
	length: {
		get: function () {
			console.warn( 'THREE.BufferAttribute: .length has been deprecated. Please use .count.' );
			return this.array.length;
		}
	}
} );

Object.assign( THREE.BufferGeometry.prototype, {
	addIndex: function ( index ) {
		console.warn( 'THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().' );
		this.setIndex( index );
	},
	addDrawCall: function ( start, count, indexOffset ) {
		if ( indexOffset !== undefined ) {
			console.warn( 'THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.' );
		}
		console.warn( 'THREE.BufferGeometry: .addDrawCall() is now .addGroup().' );
		this.addGroup( start, count );
	},
	clearDrawCalls: function () {
		console.warn( 'THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().' );
		this.clearGroups();
	},
	computeTangents: function () {
		console.warn( 'THREE.BufferGeometry: .computeTangents() has been removed.' );
	},
	computeOffsets: function () {
		console.warn( 'THREE.BufferGeometry: .computeOffsets() has been removed.' );
	}
} );

Object.defineProperties( THREE.BufferGeometry.prototype, {
	drawcalls: {
		get: function () {
			console.error( 'THREE.BufferGeometry: .drawcalls has been renamed to .groups.' );
			return this.groups;
		}
	},
	offsets: {
		get: function () {
			console.warn( 'THREE.BufferGeometry: .offsets has been renamed to .groups.' );
			return this.groups;
		}
	}
} );

//

Object.defineProperties( THREE.Material.prototype, {
	wrapAround: {
		get: function () {
			console.warn( 'THREE.' + this.type + ': .wrapAround has been removed.' );
		},
		set: function ( value ) {
			console.warn( 'THREE.' + this.type + ': .wrapAround has been removed.' );
		}
	},
	wrapRGB: {
		get: function () {
			console.warn( 'THREE.' + this.type + ': .wrapRGB has been removed.' );
			return new THREE.Color();
		}
	}
} );

Object.defineProperties( THREE.MeshPhongMaterial.prototype, {
	metal: {
		get: function () {
			console.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead.' );
			return false;
		},
		set: function ( value ) {
			console.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead' );
		}
	}
} );

Object.defineProperties( THREE.ShaderMaterial.prototype, {
	derivatives: {
		get: function () {
			console.warn( 'THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );
			return this.extensions.derivatives;
		},
		set: function ( value ) {
			console.warn( 'THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );
			this.extensions.derivatives = value;
		}
	}
} );

//

THREE.EventDispatcher.prototype = Object.assign( Object.create( {

	// Note: Extra base ensures these properties are not 'assign'ed.

	constructor: THREE.EventDispatcher,

	apply: function ( target ) {

		console.warn( "THREE.EventDispatcher: .apply is deprecated, " +
				"just inherit or Object.assign the prototype to mix-in." );

		Object.assign( target, this );

	}

} ), THREE.EventDispatcher.prototype );

//

Object.assign( THREE.WebGLRenderer.prototype, {
	supportsFloatTextures: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( \'OES_texture_float\' ).' );
		return this.extensions.get( 'OES_texture_float' );
	},
	supportsHalfFloatTextures: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( \'OES_texture_half_float\' ).' );
		return this.extensions.get( 'OES_texture_half_float' );
	},
	supportsStandardDerivatives: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( \'OES_standard_derivatives\' ).' );
		return this.extensions.get( 'OES_standard_derivatives' );
	},
	supportsCompressedTextureS3TC: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( \'WEBGL_compressed_texture_s3tc\' ).' );
		return this.extensions.get( 'WEBGL_compressed_texture_s3tc' );
	},
	supportsCompressedTexturePVRTC: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( \'WEBGL_compressed_texture_pvrtc\' ).' );
		return this.extensions.get( 'WEBGL_compressed_texture_pvrtc' );
	},
	supportsBlendMinMax: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( \'EXT_blend_minmax\' ).' );
		return this.extensions.get( 'EXT_blend_minmax' );
	},
	supportsVertexTextures: function () {
		return this.capabilities.vertexTextures;
	},
	supportsInstancedArrays: function () {
		console.warn( 'THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( \'ANGLE_instanced_arrays\' ).' );
		return this.extensions.get( 'ANGLE_instanced_arrays' );
	},
	enableScissorTest: function ( boolean ) {
		console.warn( 'THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().' );
		this.setScissorTest( boolean );
	},
	initMaterial: function () {
		console.warn( 'THREE.WebGLRenderer: .initMaterial() has been removed.' );
	},
	addPrePlugin: function () {
		console.warn( 'THREE.WebGLRenderer: .addPrePlugin() has been removed.' );
	},
	addPostPlugin: function () {
		console.warn( 'THREE.WebGLRenderer: .addPostPlugin() has been removed.' );
	},
	updateShadowMap: function () {
		console.warn( 'THREE.WebGLRenderer: .updateShadowMap() has been removed.' );
	}
} );

Object.defineProperties( THREE.WebGLRenderer.prototype, {
	shadowMapEnabled: {
		get: function () {
			return this.shadowMap.enabled;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.' );
			this.shadowMap.enabled = value;
		}
	},
	shadowMapType: {
		get: function () {
			return this.shadowMap.type;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.' );
			this.shadowMap.type = value;
		}
	},
	shadowMapCullFace: {
		get: function () {
			return this.shadowMap.cullFace;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderer: .shadowMapCullFace is now .shadowMap.cullFace.' );
			this.shadowMap.cullFace = value;
		}
	}
} );

Object.defineProperties( THREE.WebGLShadowMap.prototype, {
	cullFace: {
		get: function () {
			return this.renderReverseSided ? THREE.CullFaceFront : THREE.CullFaceBack;
		},
		set: function ( cullFace ) {
			var value = ( cullFace !== THREE.CullFaceBack );
			console.warn( "WebGLRenderer: .shadowMap.cullFace is deprecated. Set .shadowMap.renderReverseSided to " + value + "." );
			this.renderReverseSided = value;
		}
	}
} );

//

Object.defineProperties( THREE.WebGLRenderTarget.prototype, {
	wrapS: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );
			return this.texture.wrapS;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );
			this.texture.wrapS = value;
		}
	},
	wrapT: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );
			return this.texture.wrapT;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );
			this.texture.wrapT = value;
		}
	},
	magFilter: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );
			return this.texture.magFilter;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );
			this.texture.magFilter = value;
		}
	},
	minFilter: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );
			return this.texture.minFilter;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );
			this.texture.minFilter = value;
		}
	},
	anisotropy: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );
			return this.texture.anisotropy;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );
			this.texture.anisotropy = value;
		}
	},
	offset: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );
			return this.texture.offset;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );
			this.texture.offset = value;
		}
	},
	repeat: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );
			return this.texture.repeat;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );
			this.texture.repeat = value;
		}
	},
	format: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );
			return this.texture.format;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );
			this.texture.format = value;
		}
	},
	type: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );
			return this.texture.type;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );
			this.texture.type = value;
		}
	},
	generateMipmaps: {
		get: function () {
			console.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );
			return this.texture.generateMipmaps;
		},
		set: function ( value ) {
			console.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );
			this.texture.generateMipmaps = value;
		}
	}
} );

//

Object.assign( THREE.Audio.prototype, {
	load: function ( file ) {
		console.warn( 'THREE.Audio: .load has been deprecated. Please use THREE.AudioLoader.' );
		var scope = this;
		var audioLoader = new THREE.AudioLoader();
		audioLoader.load( file, function ( buffer ) {
			scope.setBuffer( buffer );
		} );
		return this;
	}
} );

Object.assign( THREE.AudioAnalyser.prototype, {
	getData: function ( file ) {
		console.warn( 'THREE.AudioAnalyser: .getData() is now .getFrequencyData().' );
		return this.getFrequencyData();
	}
} );

//

THREE.GeometryUtils = {

	merge: function ( geometry1, geometry2, materialIndexOffset ) {

		console.warn( 'THREE.GeometryUtils: .merge() has been moved to Geometry. Use geometry.merge( geometry2, matrix, materialIndexOffset ) instead.' );

		var matrix;

		if ( geometry2 instanceof THREE.Mesh ) {

			geometry2.matrixAutoUpdate && geometry2.updateMatrix();

			matrix = geometry2.matrix;
			geometry2 = geometry2.geometry;

		}

		geometry1.merge( geometry2, matrix, materialIndexOffset );

	},

	center: function ( geometry ) {

		console.warn( 'THREE.GeometryUtils: .center() has been moved to Geometry. Use geometry.center() instead.' );
		return geometry.center();

	}

};

THREE.ImageUtils = {

	crossOrigin: undefined,

	loadTexture: function ( url, mapping, onLoad, onError ) {

		console.warn( 'THREE.ImageUtils.loadTexture has been deprecated. Use THREE.TextureLoader() instead.' );

		var loader = new THREE.TextureLoader();
		loader.setCrossOrigin( this.crossOrigin );

		var texture = loader.load( url, onLoad, undefined, onError );

		if ( mapping ) texture.mapping = mapping;

		return texture;

	},

	loadTextureCube: function ( urls, mapping, onLoad, onError ) {

		console.warn( 'THREE.ImageUtils.loadTextureCube has been deprecated. Use THREE.CubeTextureLoader() instead.' );

		var loader = new THREE.CubeTextureLoader();
		loader.setCrossOrigin( this.crossOrigin );

		var texture = loader.load( urls, onLoad, undefined, onError );

		if ( mapping ) texture.mapping = mapping;

		return texture;

	},

	loadCompressedTexture: function () {

		console.error( 'THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.' );

	},

	loadCompressedTextureCube: function () {

		console.error( 'THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.' );

	}

};

//

THREE.Projector = function () {

	console.error( 'THREE.Projector has been moved to /examples/js/renderers/Projector.js.' );

	this.projectVector = function ( vector, camera ) {

		console.warn( 'THREE.Projector: .projectVector() is now vector.project().' );
		vector.project( camera );

	};

	this.unprojectVector = function ( vector, camera ) {

		console.warn( 'THREE.Projector: .unprojectVector() is now vector.unproject().' );
		vector.unproject( camera );

	};

	this.pickingRay = function ( vector, camera ) {

		console.error( 'THREE.Projector: .pickingRay() is now raycaster.setFromCamera().' );

	};

};

//

THREE.CanvasRenderer = function () {

	console.error( 'THREE.CanvasRenderer has been moved to /examples/js/renderers/CanvasRenderer.js' );

	this.domElement = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
	this.clear = function () {};
	this.render = function () {};
	this.setClearColor = function () {};
	this.setSize = function () {};

};