three.js/src/renderers/WebGLShaders.js

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

THREE.ShaderChunk = {

	// FOG

	fog_pars_fragment: [

	"#ifdef USE_FOG",

		"uniform vec3 fogColor;",

		"#ifdef FOG_EXP2",

			"uniform float fogDensity;",

		"#else",

			"uniform float fogNear;",
			"uniform float fogFar;",

		"#endif",

	"#endif"

	].join("\n"),

	fog_fragment: [

	"#ifdef USE_FOG",

		"float depth = gl_FragCoord.z / gl_FragCoord.w;",

		"#ifdef FOG_EXP2",

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

		"#else",

			"float fogFactor = smoothstep( fogNear, fogFar, depth );",

		"#endif",

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

	"#endif"

	].join("\n"),

	// ENVIRONMENT MAP

	envmap_pars_fragment: [

	"#ifdef USE_ENVMAP",

		"varying vec3 vReflect;",

		"uniform float reflectivity;",
		"uniform samplerCube envMap;",
		"uniform int combine;",

	"#endif"

	].join("\n"),

	envmap_fragment: [

	"#ifdef USE_ENVMAP",

		"vec4 cubeColor = textureCube( envMap, vec3( -vReflect.x, vReflect.yz ) );",

		"if ( combine == 1 ) {",

			"gl_FragColor = vec4( mix( gl_FragColor.xyz, cubeColor.xyz, reflectivity ), opacity );",

		"} else {",

			"gl_FragColor = gl_FragColor * cubeColor;",

		"}",

	"#endif"

	].join("\n"),

	envmap_pars_vertex: [

	"#ifdef USE_ENVMAP",

		"varying vec3 vReflect;",

		"uniform float refractionRatio;",
		"uniform bool useRefract;",

	"#endif"

	].join("\n"),

	envmap_vertex : [

	"#ifdef USE_ENVMAP",

		"vec4 mPosition = objectMatrix * vec4( position, 1.0 );",
		"vec3 nWorld = mat3( objectMatrix[ 0 ].xyz, objectMatrix[ 1 ].xyz, objectMatrix[ 2 ].xyz ) * normal;",

		"if ( useRefract ) {",

			"vReflect = refract( normalize( mPosition.xyz - cameraPosition ), normalize( nWorld.xyz ), refractionRatio );",

		"} else {",

			"vReflect = reflect( normalize( mPosition.xyz - cameraPosition ), normalize( nWorld.xyz ) );",

		"}",

	"#endif"

	].join("\n"),

	// COLOR MAP (particles)

	map_particle_pars_fragment: [

	"#ifdef USE_MAP",

		"uniform sampler2D map;",

	"#endif"

	].join("\n"),


	map_particle_fragment: [

	"#ifdef USE_MAP",

		"gl_FragColor = gl_FragColor * texture2D( map, gl_PointCoord );",

	"#endif"

	].join("\n"),

	// COLOR MAP (triangles)

	map_pars_vertex: [

	"#ifdef USE_MAP",

		"varying vec2 vUv;",
		"uniform vec4 offsetRepeat;",

	"#endif"

	].join("\n"),

	map_pars_fragment: [

	"#ifdef USE_MAP",

		"varying vec2 vUv;",
		"uniform sampler2D map;",

	"#endif"

	].join("\n"),

	map_vertex: [

	"#ifdef USE_MAP",

		"vUv = uv * offsetRepeat.zw + offsetRepeat.xy;",

	"#endif"

	].join("\n"),

	map_fragment: [

	"#ifdef USE_MAP",

		"gl_FragColor = gl_FragColor * texture2D( map, vUv );",

	"#endif"

	].join("\n"),

	// LIGHT MAP

	lightmap_pars_fragment: [

	"#ifdef USE_LIGHTMAP",

		"varying vec2 vUv2;",
		"uniform sampler2D lightMap;",

	"#endif"

	].join("\n"),

	lightmap_pars_vertex: [

	"#ifdef USE_LIGHTMAP",

		"varying vec2 vUv2;",

	"#endif"

	].join("\n"),

	lightmap_fragment: [

	"#ifdef USE_LIGHTMAP",

		"gl_FragColor = gl_FragColor * texture2D( lightMap, vUv2 );",

	"#endif"

	].join("\n"),

	lightmap_vertex: [

	"#ifdef USE_LIGHTMAP",

		"vUv2 = uv2;",

	"#endif"

	].join("\n"),

	lights_pars_vertex: [

	"uniform bool enableLighting;",
	"uniform vec3 ambientLightColor;",

	"#if MAX_DIR_LIGHTS > 0",

		"uniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];",
		"uniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];",

	"#endif",

	"#if MAX_POINT_LIGHTS > 0",

		"uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];",
		"uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];",
		"uniform float pointLightDistance[ MAX_POINT_LIGHTS ];",

		"#ifdef PHONG",

			"varying vec4 vPointLight[ MAX_POINT_LIGHTS ];",

		"#endif",

	"#endif"

	].join("\n"),

	// LIGHTS

	lights_vertex: [

	"if ( !enableLighting ) {",

		"vLightWeighting = vec3( 1.0 );",

	"} else {",

		"vLightWeighting = ambientLightColor;",

		"#if MAX_DIR_LIGHTS > 0",

		"for( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {",

			"vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );",
			"float directionalLightWeighting = max( dot( transformedNormal, normalize( lDirection.xyz ) ), 0.0 );",
			"vLightWeighting += directionalLightColor[ i ] * directionalLightWeighting;",

		"}",

		"#endif",

		"#if MAX_POINT_LIGHTS > 0",

			"for( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {",

				"vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );",

				"vec3 lVector = lPosition.xyz - mvPosition.xyz;",

				"float lDistance = 1.0;",

				"if ( pointLightDistance[ i ] > 0.0 )",
					"lDistance = 1.0 - min( ( length( lVector ) / pointLightDistance[ i ] ), 1.0 );",

				"lVector = normalize( lVector );",

				"float pointLightWeighting = max( dot( transformedNormal, lVector ), 0.0 );",
				"vLightWeighting += pointLightColor[ i ] * pointLightWeighting * lDistance;",

				"#ifdef PHONG",
					"vPointLight[ i ] = vec4( lVector, lDistance );",
				"#endif",

			"}",

		"#endif",

	"}"

	].join("\n"),

	lights_pars_fragment: [

	"#if MAX_DIR_LIGHTS > 0",
		"uniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];",
	"#endif",

	"#if MAX_POINT_LIGHTS > 0",
		"varying vec4 vPointLight[ MAX_POINT_LIGHTS ];",
	"#endif",

	"varying vec3 vViewPosition;",
	"varying vec3 vNormal;"

	].join("\n"),

	lights_fragment: [

	"vec3 normal = normalize( vNormal );",
	"vec3 viewPosition = normalize( vViewPosition );",

	"vec4 mColor = vec4( diffuse, opacity );",
	"vec4 mSpecular = vec4( specular, opacity );",

	"#if MAX_POINT_LIGHTS > 0",

		"vec4 pointDiffuse  = vec4( vec3( 0.0 ), 1.0 );",
		"vec4 pointSpecular = vec4( vec3( 0.0 ), 1.0 );",

		"for ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {",

			"vec3 pointVector = normalize( vPointLight[ i ].xyz );",
			"vec3 pointHalfVector = normalize( vPointLight[ i ].xyz + viewPosition );",
			"float pointDistance = vPointLight[ i ].w;",

			"float pointDotNormalHalf = dot( normal, pointHalfVector );",
			"float pointDiffuseWeight = max( dot( normal, pointVector ), 0.0 );",

			"float pointSpecularWeight = 0.0;",

			"if ( pointDotNormalHalf >= 0.0 )",
				"pointSpecularWeight = pow( pointDotNormalHalf, shininess );",

			"pointDiffuse  += mColor * pointDiffuseWeight * pointDistance;",
			"pointSpecular += mSpecular * pointSpecularWeight * pointDistance;",

		"}",

	"#endif",

	"#if MAX_DIR_LIGHTS > 0",

		"vec4 dirDiffuse  = vec4( vec3( 0.0 ), 1.0 );",
		"vec4 dirSpecular = vec4( vec3( 0.0 ), 1.0 );" ,

		"for( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {",

			"vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );",

			"vec3 dirVector = normalize( lDirection.xyz );",
			"vec3 dirHalfVector = normalize( lDirection.xyz + viewPosition );",

			"float dirDotNormalHalf = dot( normal, dirHalfVector );",

			"float dirDiffuseWeight = max( dot( normal, dirVector ), 0.0 );",

			"float dirSpecularWeight = 0.0;",
			"if ( dirDotNormalHalf >= 0.0 )",
				"dirSpecularWeight = pow( dirDotNormalHalf, shininess );",

			"dirDiffuse  += mColor * dirDiffuseWeight;",
			"dirSpecular += mSpecular * dirSpecularWeight;",

		"}",

	"#endif",

	"vec4 totalDiffuse = vec4( vec3( 0.0 ), opacity );",
	"vec4 totalSpecular = vec4( ambient, opacity );",

	"#if MAX_DIR_LIGHTS > 0",

		"totalDiffuse += dirDiffuse;",
		"totalSpecular += dirSpecular;",

	"#endif",

	"#if MAX_POINT_LIGHTS > 0",

		"totalDiffuse += pointDiffuse;",
		"totalSpecular += pointSpecular;",

	"#endif",

	"gl_FragColor.xyz = gl_FragColor.xyz * totalDiffuse.xyz + totalSpecular.xyz;"

	].join("\n"),

	// VERTEX COLORS

	color_pars_fragment: [

	"#ifdef USE_COLOR",

		"varying vec3 vColor;",

	"#endif"

	].join("\n"),


	color_fragment: [

	"#ifdef USE_COLOR",

		"gl_FragColor = gl_FragColor * vec4( vColor, opacity );",

	"#endif"

	].join("\n"),

	color_pars_vertex: [

	"#ifdef USE_COLOR",

		"varying vec3 vColor;",

	"#endif"

	].join("\n"),


	color_vertex: [

	"#ifdef USE_COLOR",

		"vColor = color;",

	"#endif"

	].join("\n"),

	// SKINNING

	skinning_pars_vertex: [

	"#ifdef USE_SKINNING",

		"uniform mat4 boneGlobalMatrices[ MAX_BONES ];",

	"#endif"

	].join("\n"),

	skinning_vertex: [

	"#ifdef USE_SKINNING",

		"gl_Position  = ( boneGlobalMatrices[ int( skinIndex.x ) ] * skinVertexA ) * skinWeight.x;",
		"gl_Position += ( boneGlobalMatrices[ int( skinIndex.y ) ] * skinVertexB ) * skinWeight.y;",

		// this doesn't work, no idea why
		//"gl_Position  = projectionMatrix * cameraInverseMatrix * objectMatrix * gl_Position;",

		"gl_Position  = projectionMatrix * viewMatrix * objectMatrix * gl_Position;",

	"#endif"

	].join("\n"),

	// MORPHING

	morphtarget_pars_vertex: [

	"#ifdef USE_MORPHTARGETS",

		"uniform float morphTargetInfluences[ 8 ];",

	"#endif"

	].join("\n"),

	morphtarget_vertex: [

	"#ifdef USE_MORPHTARGETS",

		"vec3 morphed = vec3( 0.0, 0.0, 0.0 );",
		"morphed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];",
		"morphed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];",
		"morphed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];",
		"morphed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];",
		"morphed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];",
		"morphed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];",
		"morphed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];",
		"morphed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];",
		"morphed += position;",

		"gl_Position = projectionMatrix * modelViewMatrix * vec4( morphed, 1.0 );",

	"#endif"

	].join("\n"),

	default_vertex : [

	"#ifndef USE_MORPHTARGETS",
	"#ifndef USE_SKINNING",

		"gl_Position = projectionMatrix * mvPosition;",

	"#endif",
	"#endif"

	].join("\n"),

	// SHADOW MAP

	// based on SpiderGL shadow map and Fabien Sanglard's GLSL shadow mapping examples
	//  http://spidergl.org/example.php?id=6
	// 	http://fabiensanglard.net/shadowmapping

	shadowmap_pars_fragment: [

	"#ifdef USE_SHADOWMAP",

		"uniform sampler2D shadowMap[ MAX_SHADOWS ];",

		"uniform float shadowDarkness;",
		"uniform float shadowBias;",

		"varying vec4 vShadowCoord[ MAX_SHADOWS ];",

		"float unpackDepth( const in vec4 rgba_depth ) {",

			"const vec4 bit_shift = vec4( 1.0 / ( 256.0 * 256.0 * 256.0 ), 1.0 / ( 256.0 * 256.0 ), 1.0 / 256.0, 1.0 );",
			"float depth = dot( rgba_depth, bit_shift );",
			"return depth;",

		"}",

	"#endif"

	].join("\n"),

	shadowmap_fragment: [

	"#ifdef USE_SHADOWMAP",

		"#ifdef SHADOWMAP_SOFT",

			"const float xPixelOffset = 1.0 / SHADOWMAP_WIDTH;",
			"const float yPixelOffset = 1.0 / SHADOWMAP_HEIGHT;",

		"#endif",

		"vec4 shadowColor = vec4( 1.0 );",

		"for( int i = 0; i < MAX_SHADOWS; i ++ ) {",

			"vec3 shadowCoord = vShadowCoord[ i ].xyz / vShadowCoord[ i ].w;",
			"shadowCoord.z += shadowBias;",

			"if ( shadowCoord.x >= 0.0 && shadowCoord.x <= 1.0 && shadowCoord.y >= 0.0 && shadowCoord.y <= 1.0 ) {",

				"#ifdef SHADOWMAP_SOFT",

					// Percentage-close filtering
					// (9 pixel kernel)
					// http://fabiensanglard.net/shadowmappingPCF/

					"float shadow = 0.0;",

					"for ( float y = -1.25; y <= 1.25; y += 1.25 )",
						"for ( float x = -1.25; x <= 1.25; x += 1.25 ) {",

							"vec4 rgbaDepth = texture2D( shadowMap[ i ], vec2( x * xPixelOffset, y * yPixelOffset ) + shadowCoord.xy );",

							// doesn't seem to produce any noticeable visual difference compared to simple "texture2D" lookup
							//"vec4 rgbaDepth = texture2DProj( shadowMap[ i ], vec4( vShadowCoord[ i ].w * ( vec2( x * xPixelOffset, y * yPixelOffset ) + shadowCoord.xy ), 0.05, vShadowCoord[ i ].w ) );",

							"float fDepth = unpackDepth( rgbaDepth );",

							"if ( fDepth < shadowCoord.z )",
								"shadow += 1.0;",

					"}",

					"shadow /= 9.0;",

					"shadowColor = shadowColor * vec4( vec3( ( 1.0 - shadowDarkness * shadow ) ), 1.0 );",

				"#else",

					"vec4 rgbaDepth = texture2D( shadowMap[ i ], shadowCoord.xy );",
					"float fDepth = unpackDepth( rgbaDepth );",

					"if ( fDepth < shadowCoord.z )",

						// spot with multiple shadows is darker

						"shadowColor = shadowColor * vec4( vec3( shadowDarkness ), 1.0 );",

						// spot with multiple shadows has the same color as single shadow spot

						//"shadowColor = min( shadowColor, vec4( vec3( shadowDarkness ), 1.0 ) );",

				"#endif",

			"}",


			// uncomment to see light frustum boundaries
			//"if ( !( shadowCoord.x >= 0.0 && shadowCoord.x <= 1.0 && shadowCoord.y >= 0.0 && shadowCoord.y <= 1.0 ) )",
			//	"gl_FragColor =  gl_FragColor * vec4( 1.0, 0.0, 0.0, 1.0 );",

		"}",

		"gl_FragColor = gl_FragColor * shadowColor;",

	"#endif"

	].join("\n"),

	shadowmap_pars_vertex: [

	"#ifdef USE_SHADOWMAP",

		"varying vec4 vShadowCoord[ MAX_SHADOWS ];",
		"uniform mat4 shadowMatrix[ MAX_SHADOWS ];",

	"#endif"

	].join("\n"),

	shadowmap_vertex: [

	"#ifdef USE_SHADOWMAP",

		"for( int i = 0; i < MAX_SHADOWS; i ++ ) {",

			"vShadowCoord[ i ] = shadowMatrix[ i ] * objectMatrix * vec4( position, 1.0 );",

		"}",

	"#endif"

	].join("\n"),

	// ALPHATEST

	alphatest_fragment: [

	"#ifdef ALPHATEST",

		"if ( gl_FragColor.a < ALPHATEST ) discard;",

	"#endif"

	].join("\n")

};

THREE.UniformsUtils = {

	merge: function ( uniforms ) {

		var u, p, tmp, merged = {};

		for ( u = 0; u < uniforms.length; u++ ) {

			tmp = this.clone( uniforms[ u ] );

			for ( p in tmp ) {

				merged[ p ] = tmp[ p ];

			}

		}

		return merged;

	},

	clone: function ( uniforms_src ) {

		var u, p, parameter, parameter_src, uniforms_dst = {};

		for ( u in uniforms_src ) {

			uniforms_dst[ u ] = {};

			for ( p in uniforms_src[ u ] ) {

				parameter_src = uniforms_src[ u ][ p ];

				if ( parameter_src instanceof THREE.Color ||
					 parameter_src instanceof THREE.Vector2 ||
					 parameter_src instanceof THREE.Vector3 ||
					 parameter_src instanceof THREE.Vector4 ||
					 parameter_src instanceof THREE.Matrix4 ||
					 parameter_src instanceof THREE.Texture ) {

					uniforms_dst[ u ][ p ] = parameter_src.clone();

				} else if ( parameter_src instanceof Array ) {

					uniforms_dst[ u ][ p ] = parameter_src.slice();

				} else {

					uniforms_dst[ u ][ p ] = parameter_src;

				}

			}

		}

		return uniforms_dst;

	}

};

THREE.UniformsLib = {

	common: {

		"diffuse" : { type: "c", value: new THREE.Color( 0xeeeeee ) },
		"opacity" : { type: "f", value: 1.0 },

		"map" : { type: "t", value: 0, texture: null },
		"offsetRepeat" : { type: "v4", value: new THREE.Vector4( 0, 0, 1, 1 ) },

		"lightMap" : { type: "t", value: 2, texture: null },

		"envMap" : { type: "t", value: 1, texture: null },
		"useRefract" : { type: "i", value: 0 },
		"reflectivity" : { type: "f", value: 1.0 },
		"refractionRatio" : { type: "f", value: 0.98 },
		"combine" : { type: "i", value: 0 },

		"morphTargetInfluences" : { type: "f", value: 0 }

	},

	fog : {

		"fogDensity" : { type: "f", value: 0.00025 },
		"fogNear" : { type: "f", value: 1 },
		"fogFar" : { type: "f", value: 2000 },
		"fogColor" : { type: "c", value: new THREE.Color( 0xffffff ) }

	},

	lights: {

		"enableLighting" : { type: "i", value: 1 },
		"ambientLightColor" : { type: "fv", value: [] },
		"directionalLightDirection" : { type: "fv", value: [] },
		"directionalLightColor" : { type: "fv", value: [] },
		"pointLightColor" : { type: "fv", value: [] },
		"pointLightPosition" : { type: "fv", value: [] },
		"pointLightDistance" : { type: "fv1", value: [] }

	},

	particle: {

		"psColor" : { type: "c", value: new THREE.Color( 0xeeeeee ) },
		"opacity" : { type: "f", value: 1.0 },
		"size" : { type: "f", value: 1.0 },
		"scale" : { type: "f", value: 1.0 },
		"map" : { type: "t", value: 0, texture: null },

		"fogDensity" : { type: "f", value: 0.00025 },
		"fogNear" : { type: "f", value: 1 },
		"fogFar" : { type: "f", value: 2000 },
		"fogColor" : { type: "c", value: new THREE.Color( 0xffffff ) }

	},

	shadowmap: {

		"shadowMap": { type: "tv", value: 3, texture: [] },
		"shadowMatrix" : { type: "m4v", value: [] },

		"shadowBias" : { type: "f", value: 0.0039 },
		"shadowDarkness": { type: "f", value: 0.2 }

	}

};

THREE.ShaderLib = {

	'sprite': {

		vertexShader: [

			"uniform int useScreenCoordinates;",
			"uniform int affectedByDistance;",
			"uniform vec3 screenPosition;",
			"uniform mat4 modelViewMatrix;",
			"uniform mat4 projectionMatrix;",
			"uniform float rotation;",
			"uniform vec2 scale;",
			"uniform vec2 alignment;",
			"uniform vec2 uvOffset;",
			"uniform vec2 uvScale;",

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

			"varying vec2 vUV;",

			"void main() {",

				"vUV = uvOffset + uv * uvScale;",

				"vec2 alignedPosition = position + alignment;",

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

				"vec4 finalPosition;",

				"if( useScreenCoordinates != 0 ) {",

					"finalPosition = vec4( screenPosition.xy + rotatedPosition, screenPosition.z, 1.0 );",

				"} else {",

					"finalPosition = projectionMatrix * modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );",
					"finalPosition.xy += rotatedPosition * ( affectedByDistance == 1 ? 1.0 : finalPosition.z );",

				"}",

				"gl_Position = finalPosition;",

			"}"

		].join( "\n" ),

		fragmentShader: [

			"#ifdef GL_ES",
				"precision highp float;",
			"#endif",

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

			"varying vec2 vUV;",

			"void main() {",

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

			"}"

		].join( "\n" )

	},

	'depth': {

		uniforms: { "mNear": { type: "f", value: 1.0 },
					"mFar" : { type: "f", value: 2000.0 },
					"opacity" : { type: "f", value: 1.0 }
				  },

		fragmentShader: [

			"uniform float mNear;",
			"uniform float mFar;",
			"uniform float opacity;",

			"void main() {",

				"float depth = gl_FragCoord.z / gl_FragCoord.w;",
				"float color = 1.0 - smoothstep( mNear, mFar, depth );",
				"gl_FragColor = vec4( vec3( color ), opacity );",

			"}"

		].join("\n"),

		vertexShader: [

			"void main() {",

				"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",

			"}"

		].join("\n")

	},

	'normal': {

		uniforms: { "opacity" : { type: "f", value: 1.0 } },

		fragmentShader: [

			"uniform float opacity;",
			"varying vec3 vNormal;",

			"void main() {",

				"gl_FragColor = vec4( 0.5 * normalize( vNormal ) + 0.5, opacity );",

			"}"

		].join("\n"),

		vertexShader: [

			"varying vec3 vNormal;",

			"void main() {",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
				"vNormal = normalize( normalMatrix * normal );",

				"gl_Position = projectionMatrix * mvPosition;",

			"}"

		].join("\n")

	},

	'basic': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "fog" ],
			THREE.UniformsLib[ "shadowmap" ]

		] ),

		fragmentShader: [

			"uniform vec3 diffuse;",
			"uniform float opacity;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_pars_fragment" ],
			THREE.ShaderChunk[ "lightmap_pars_fragment" ],
			THREE.ShaderChunk[ "envmap_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( diffuse, opacity );",

				THREE.ShaderChunk[ "map_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],
				THREE.ShaderChunk[ "lightmap_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "envmap_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],
				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n"),

		vertexShader: [

			THREE.ShaderChunk[ "map_pars_vertex" ],
			THREE.ShaderChunk[ "lightmap_pars_vertex" ],
			THREE.ShaderChunk[ "envmap_pars_vertex" ],
			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],
			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",

				THREE.ShaderChunk[ "map_vertex" ],
				THREE.ShaderChunk[ "lightmap_vertex" ],
				THREE.ShaderChunk[ "envmap_vertex" ],
				THREE.ShaderChunk[ "color_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n")

	},

	'lambert': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "fog" ],
			THREE.UniformsLib[ "lights" ],
			THREE.UniformsLib[ "shadowmap" ]

		] ),

		fragmentShader: [

			"uniform vec3 diffuse;",
			"uniform float opacity;",

			"varying vec3 vLightWeighting;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_pars_fragment" ],
			THREE.ShaderChunk[ "lightmap_pars_fragment" ],
			THREE.ShaderChunk[ "envmap_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( diffuse, opacity );",

				THREE.ShaderChunk[ "map_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],

				"gl_FragColor = gl_FragColor * vec4( vLightWeighting, 1.0 );",

				THREE.ShaderChunk[ "lightmap_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "envmap_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],
				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n"),

		vertexShader: [

			"varying vec3 vLightWeighting;",

			THREE.ShaderChunk[ "map_pars_vertex" ],
			THREE.ShaderChunk[ "lightmap_pars_vertex" ],
			THREE.ShaderChunk[ "envmap_pars_vertex" ],
			THREE.ShaderChunk[ "lights_pars_vertex" ],
			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],
			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",

				THREE.ShaderChunk[ "map_vertex" ],
				THREE.ShaderChunk[ "lightmap_vertex" ],
				THREE.ShaderChunk[ "envmap_vertex" ],
				THREE.ShaderChunk[ "color_vertex" ],

				"vec3 transformedNormal = normalize( normalMatrix * normal );",

				THREE.ShaderChunk[ "lights_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],


			"}"

		].join("\n")

	},

	'phong': {

		uniforms: THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "common" ],
			THREE.UniformsLib[ "fog" ],
			THREE.UniformsLib[ "lights" ],
			THREE.UniformsLib[ "shadowmap" ],

			{
				"ambient"  : { type: "c", value: new THREE.Color( 0x050505 ) },
				"specular" : { type: "c", value: new THREE.Color( 0x111111 ) },
				"shininess": { type: "f", value: 30 }
			}

		] ),

		fragmentShader: [

			"uniform vec3 diffuse;",
			"uniform float opacity;",

			"uniform vec3 ambient;",
			"uniform vec3 specular;",
			"uniform float shininess;",

			"varying vec3 vLightWeighting;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_pars_fragment" ],
			THREE.ShaderChunk[ "lightmap_pars_fragment" ],
			THREE.ShaderChunk[ "envmap_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "lights_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( vLightWeighting, opacity );",

				THREE.ShaderChunk[ "map_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],

				THREE.ShaderChunk[ "lights_fragment" ],

				THREE.ShaderChunk[ "lightmap_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "envmap_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],
				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n"),

		vertexShader: [

			"#define PHONG",

			"varying vec3 vLightWeighting;",
			"varying vec3 vViewPosition;",
			"varying vec3 vNormal;",

			THREE.ShaderChunk[ "map_pars_vertex" ],
			THREE.ShaderChunk[ "lightmap_pars_vertex" ],
			THREE.ShaderChunk[ "envmap_pars_vertex" ],
			THREE.ShaderChunk[ "lights_pars_vertex" ],
			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "skinning_pars_vertex" ],
			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",

				THREE.ShaderChunk[ "map_vertex" ],
				THREE.ShaderChunk[ "lightmap_vertex" ],
				THREE.ShaderChunk[ "envmap_vertex" ],
				THREE.ShaderChunk[ "color_vertex" ],

				"#ifndef USE_ENVMAP",

					"vec4 mPosition = objectMatrix * vec4( position, 1.0 );",

				"#endif",

				"vViewPosition = -mvPosition.xyz;",

				"vec3 transformedNormal = normalize( normalMatrix * normal );",
				"vNormal = transformedNormal;",

				THREE.ShaderChunk[ "lights_vertex" ],
				THREE.ShaderChunk[ "skinning_vertex" ],
				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],
				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n")

	},

	'particle_basic': {

		uniforms:  THREE.UniformsUtils.merge( [

			THREE.UniformsLib[ "particle" ],
			THREE.UniformsLib[ "shadowmap" ]

		] ),

		fragmentShader: [

			"uniform vec3 psColor;",
			"uniform float opacity;",

			THREE.ShaderChunk[ "color_pars_fragment" ],
			THREE.ShaderChunk[ "map_particle_pars_fragment" ],
			THREE.ShaderChunk[ "fog_pars_fragment" ],
			THREE.ShaderChunk[ "shadowmap_pars_fragment" ],

			"void main() {",

				"gl_FragColor = vec4( psColor, opacity );",

				THREE.ShaderChunk[ "map_particle_fragment" ],
				THREE.ShaderChunk[ "alphatest_fragment" ],
				THREE.ShaderChunk[ "color_fragment" ],
				THREE.ShaderChunk[ "shadowmap_fragment" ],
				THREE.ShaderChunk[ "fog_fragment" ],

			"}"

		].join("\n"),

		vertexShader: [

			"uniform float size;",
			"uniform float scale;",

			THREE.ShaderChunk[ "color_pars_vertex" ],
			THREE.ShaderChunk[ "shadowmap_pars_vertex" ],

			"void main() {",

				THREE.ShaderChunk[ "color_vertex" ],

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",

				"#ifdef USE_SIZEATTENUATION",
					"gl_PointSize = size * ( scale / length( mvPosition.xyz ) );",
				"#else",
					"gl_PointSize = size;",
				"#endif",

				"gl_Position = projectionMatrix * mvPosition;",

				THREE.ShaderChunk[ "shadowmap_vertex" ],

			"}"

		].join("\n")

	},

	// Depth encoding into RGBA texture
	// 	based on SpiderGL shadow map example
	// 		http://spidergl.org/example.php?id=6
	// 	originally from
	//		http://www.gamedev.net/topic/442138-packing-a-float-into-a-a8r8g8b8-texture-shader/page__whichpage__1%25EF%25BF%25BD
	// 	see also here:
	//		http://aras-p.info/blog/2009/07/30/encoding-floats-to-rgba-the-final/

	'depthRGBA': {

		uniforms: {},

		fragmentShader: [

			"vec4 pack_depth( const in float depth ) {",

				"const vec4 bit_shift = vec4( 256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0 );",
				"const vec4 bit_mask  = vec4( 0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0 );",
				"vec4 res = fract( depth * bit_shift );",
				"res -= res.xxyz * bit_mask;",
				"return res;",

			"}",

			"void main() {",

				"gl_FragData[ 0 ] = pack_depth( gl_FragCoord.z );",

				//"gl_FragData[ 0 ] = pack_depth( gl_FragCoord.z / gl_FragCoord.w );",
				//"float z = ( ( gl_FragCoord.z / gl_FragCoord.w ) - 3.0 ) / ( 4000.0 - 3.0 );",
				//"gl_FragData[ 0 ] = pack_depth( z );",
				//"gl_FragData[ 0 ] = vec4( z, z, z, 1.0 );",

			"}"

		].join("\n"),

		vertexShader: [

			THREE.ShaderChunk[ "morphtarget_pars_vertex" ],

			"void main() {",

				"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",

				THREE.ShaderChunk[ "morphtarget_vertex" ],
				THREE.ShaderChunk[ "default_vertex" ],

			"}"

		].join("\n")

	}

};