samien
/
three.js
espejo de https://github.com/mrdoob/three.js.git


			
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							<!doctype html>
<html lang="en">
	<head>
		<title>three.js webgl - geometry - shapes</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				font-family: Monospace;
				background-color: #f0f0f0;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>
		<canvas id="debug" style="position:absolute; left:100px"></canvas>

		<script src="../build/Three.js"></script>
		<script src="../src/extras/core/Curve.js"></script>
		<script src="../src/extras/geometries/TubeGeometry.js"></script>
		<script src="js/Stats.js"></script>

		<script>

			// Lets define some curves

			// Formula from http://mathworld.wolfram.com/HeartCurve.html

			THREE.HeartCurve = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 5 : s;

				},

				function ( t ) {

					t *= 2 * Math.PI;

					var tx = 16 * Math.pow( Math.sin( t ), 3 );
					var ty = 13 * Math.cos( t )
							- 5 * Math.cos( 2 * t )
							- 2 * Math.cos( 3 * t )
							- Math.cos( 4 * t );
					var tz = 0;

					return new THREE.Vector3( tx, ty, tz ).multiplyScalar( this.scale );

				}

			);


			// Viviani's Curve
			// http://en.wikipedia.org/wiki/Viviani%27s_curve

			THREE.VivianiCurve = THREE.Curve.create(

				function ( radius ) {

					this.radius = radius;

				},

				function ( t ) {

					t = t * 4 * Math.PI; // Normalized to 0..1
					var a = this.radius / 2;
					var tx = a * ( 1 + Math.cos( t ) );
					var ty = a * Math.sin( t );
					var tz = 2 * a * Math.sin( t / 2 );

					return new THREE.Vector3( tx, ty, tz );

				}

			);


			THREE.KnotCurve = THREE.Curve.create(

				function () {

				},

				function ( t ) {

					t *= 2 * Math.PI;

					var R = 10;
					var s = 50;
					var tx = s * Math.sin( t );
					var ty = Math.cos( t ) * ( R + s * Math.cos( t ) );
					var tz = Math.sin( t ) * ( R + s * Math.cos( t ) );

					return new THREE.Vector3( tx, ty, tz );

				}

			);

			THREE.HelixCurve = THREE.Curve.create(

				function () {

				},

				function ( t ) {

					var a = 30; // radius
					var b = 150; //height
					var t2 = 2 * Math.PI * t * b / 30;
					var tx = Math.cos( t2 ) * a;
					var ty = Math.sin( t2 ) * a;
					var tz = b * t;

					return new THREE.Vector3( tx, ty, tz );

				}

			);

			// Replacement for TorusKnotGeometry?

			THREE.TrefoilKnot = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 10 : s;

				},

				function ( t ) {

					t *= Math.PI * 2;
					var tx = ( 2 + Math.cos( 3 * t ) ) * Math.cos( 2 * t );
					var ty = ( 2 + Math.cos( 3 * t ) ) * Math.sin( 2 * t );
					var tz = Math.sin( 3 * t );

					return new THREE.Vector3( tx, ty, tz ).multiplyScalar( this.scale );

				}

			);

			// Formulas from http://mathdl.maa.org/images/upload_library/23/stemkoski/knots/page6.html

			THREE.TorusKnot = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 10 : s;

				},

				function ( t ) {

					t *= Math.PI * 2;
					var p = 3, q = 4;
					var tx = ( 2 + Math.cos( q * t ) ) * Math.cos( p * t );
					var ty = ( 2 + Math.cos( q * t ) ) * Math.sin( p * t );
					var tz = Math.sin( q * t );

					return new THREE.Vector3( tx, ty, tz ).multiplyScalar( this.scale );

				}

			);


			THREE.CinquefoilKnot = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 10 : s;

				},

				function ( t ) {

					t *= Math.PI * 2;
					var p = 2, q = 5;
					var tx = ( 2 + Math.cos( q * t ) ) * Math.cos( p * t );
					var ty = ( 2 + Math.cos( q * t ) ) * Math.sin( p * t );
					var tz = Math.sin( q * t );

					return new THREE.Vector3( tx, ty, tz ).multiplyScalar( this.scale );

				}

			);


			THREE.TrefoilPolynomialKnot = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 10 : s;

				},

				function ( t ) {

					t = t * 4 - 2;
					var tx = Math.pow( t, 3 ) - 3 * t;
					var ty = Math.pow( t, 4 ) - 4 * t * t;
					var tz = 1/ 5 * Math.pow( t, 5 ) - 2 * t;

					return new THREE.Vector3(tx, ty, tz).multiplyScalar(this.scale);

				}

			);

			var sin = Math.sin, pow = Math.pow, cos = Math.cos;
			var scale = function ( x, y, t ) {

				var r = y - x;
				return t * r + x;

			}

			THREE.FigureEightPolynomialKnot = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 1 : s;

				},

				function ( t ) {

					t = scale( -4, 4, t );
					var tx = 2 / 5 * t * ( t * t - 7 ) * ( t * t - 10 );
					var ty = pow( t, 4 ) - 13 * t * t;
					var tz = 1 / 10 * t * ( t * t - 4 ) * ( t * t - 9 ) * ( t * t - 12 );

					return new THREE.Vector3( tx, ty, tz ).multiplyScalar( this.scale );

				}

			);


			// When there's time, try more formulas at http://mathdl.maa.org/images/upload_library/23/stemkoski/knots/page4.html

			//http://www.mi.sanu.ac.rs/vismath/taylorapril2011/Taylor.pdf

			THREE.DecoratedTorusKnot4a = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 40 : s;

				},

				function ( t ) {

					t *= Math.PI * 2;
					var x = cos( 2 * t ) * ( 1 + 0.6 * ( cos( 5 * t ) + 0.75 * cos( 10 * t ) ) );
					var y = sin( 2 * t ) * ( 1 + 0.6 * ( cos( 5 * t ) + 0.75 * cos( 10 * t ) ) );
					var z = 0.35 * sin( 5 * t );

					return new THREE.Vector3( x, y, z ).multiplyScalar( this.scale );

				}

			);


			THREE.DecoratedTorusKnot4b = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 40 : s;

				},

				function ( t ) {

					var fi = t  * Math.PI * 2;
					var	x = cos( 2 * fi ) * ( 1 + 0.45 * cos( 3 * fi ) + 0.4 * cos( 9 * fi ) );
					var y = sin( 2 * fi ) * ( 1 + 0.45 * cos( 3 * fi ) + 0.4 * cos( 9 * fi ) );
					var z = 0.2 * sin( 9 * fi );

					return new THREE.Vector3( x, y, z ).multiplyScalar( this.scale );

				}

			);


			THREE.DecoratedTorusKnot5a = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 40 : s;

				},

				function ( t ) {

					var fi = t  * Math.PI * 2;
					var x = cos( 3 * fi ) * ( 1 + 0.3 * cos( 5 * fi ) + 0.5 * cos( 10 * fi ) );
					var y = sin( 3 * fi ) * ( 1 + 0.3 * cos( 5 * fi ) + 0.5 * cos( 10 * fi ) );
					var z = 0.2 * sin( 20 * fi );

					return new THREE.Vector3( x, y, z ).multiplyScalar( this.scale );

				}

			);

			THREE.DecoratedTorusKnot5c = THREE.Curve.create(

				function ( s ) {

					this.scale = ( s === undefined ) ? 40 : s;

				},

				function ( t ) {

					var fi = t  * Math.PI * 2;
					var x = cos( 4 * fi ) * ( 1 + 0.5 * ( cos( 5 * fi ) + 0.4 * cos( 20 * fi ) ) );
					var y = sin( 4 * fi ) * ( 1 + 0.5 * ( cos( 5 * fi ) + 0.4 * cos( 20 * fi ) ) );
					var z = 0.35 * sin( 15 * fi );

					return new THREE.Vector3( x, y, z ).multiplyScalar( this.scale );

				}

			);

			//

			var container, stats;

			var camera, scene, renderer;

			var text, plane;

			var targetRotation = 0;
			var targetRotationOnMouseDown = 0;

			var mouseX = 0;
			var mouseXOnMouseDown = 0;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			init();
			animate();

			function init() {

				container = document.createElement('div');
				document.body.appendChild(container);

				var info = document.createElement('div');
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = 'Simple procedurally generated 3D shapes example by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br>Drag to spin';
				container.appendChild(info);

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
				camera.position.set(0, 50, 500);
				scene.add(camera);

				var light = new THREE.DirectionalLight(0xffffff);
				light.position.set(0, 0, 1);
				scene.add(light);

				parent = new THREE.Object3D();
				parent.position.y = 100;
				scene.add(parent);

				function addGeometry(geometry, color, x, y, z, rx, ry, rz, s) {

					// 3d shape

					var mesh = THREE.SceneUtils.createMultiMaterialObject( geometry, [

						new THREE.MeshLambertMaterial( { color: color, opacity: 0.2, transparent: true } ),
						new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.3, wireframe: true } )

					] );

					if ( geometry.debug ) mesh.add( geometry.debug );

					mesh.position.set( x, y, z - 75 );
					mesh.rotation.set( rx, ry, rz );
					mesh.scale.set(s, s, s);
					//mesh.children[0].doubleSided = true;
					parent.add( mesh );

				}

				// var extrudePath = new THREE.SplineCurve3([
				// new THREE.Vector3(0, 10, -10), new THREE.Vector3(10, 0, -10), new THREE.Vector3(20, 0, 0), new THREE.Vector3(30, 0, 10), new THREE.Vector3(30, 0, 20), new THREE.Vector3(20, 0, 30), new THREE.Vector3(10, 0, 30), new THREE.Vector3(0, 0, 30), new THREE.Vector3(-10, 10, 30), new THREE.Vector3(-10, 20, 30), new THREE.Vector3(0, 30, 30), new THREE.Vector3(10, 30, 30), new THREE.Vector3(20, 30, 15), new THREE.Vector3(10, 30, 10),

				// new THREE.Vector3(0, 30, 10), new THREE.Vector3(-10, 20, 10), new THREE.Vector3(-10, 10, 10), new THREE.Vector3(0, 0, 10), new THREE.Vector3(10, -10, 10), new THREE.Vector3(20, -15, 10), new THREE.Vector3(30, -15, 10), new THREE.Vector3(40, -15, 10), new THREE.Vector3(50, -15, 10), new THREE.Vector3(60, 0, 10), new THREE.Vector3(70, 0, 0), new THREE.Vector3(80, 0, 0), new THREE.Vector3(90, 0, 0), new THREE.Vector3(100, 0, 0)]);

				// var extrudePath = new THREE.HeartCurve( 3.5 );
				// var extrudePath = new THREE.VivianiCurve( 70 );
				// var extrudePath = new THREE.KnotCurve();
				// extrudePath = new THREE.HelixCurve();

				// var extrudePath = new THREE.ClosedSplineCurve3( [
				// 	new THREE.Vector3( 0, -40, -40 ),
				// 	new THREE.Vector3( 0, 40, -40 ),
				// 	new THREE.Vector3( 0, 140, -40 ),
				// 	new THREE.Vector3( 0, 40, 40 ),
				// 	new THREE.Vector3( 0, -40, 40 ),
				// ] );

				extrudePath = new THREE.TrefoilKnot();
				// extrudePath = new THREE.TorusKnot( 20 );
				// extrudePath = new THREE.CinquefoilKnot( 20 );
				// extrudePath = new THREE.TrefoilPolynomialKnot( 14 );
				// extrudePath = new THREE.FigureEightPolynomialKnot();
				// extrudePath = new THREE.DecoratedTorusKnot4a();
				// extrudePath = new THREE.DecoratedTorusKnot4b();
				// extrudePath = new THREE.DecoratedTorusKnot5a();
				// extrudePath = new THREE.DecoratedTorusKnot5c();

				var closed = true;
				var debug = true;
				var tube = new THREE.TubeGeometry( extrudePath, 100, 2, 3, closed, debug );

				addGeometry(tube, 0xff00ff, 0, -80, 0, 0, 0, 0, 6);

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild(renderer.domElement);

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

				document.addEventListener( 'mousedown', onDocumentMouseDown, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );

			}

			//

			function onDocumentMouseDown( event ) {

				event.preventDefault();

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'mouseup', onDocumentMouseUp, false );
				document.addEventListener( 'mouseout', onDocumentMouseOut, false );

				mouseXOnMouseDown = event.clientX - windowHalfX;
				targetRotationOnMouseDown = targetRotation;

			}

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;
				targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;

			}

			function onDocumentMouseUp( event ) {

				document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
				document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
				document.removeEventListener( 'mouseout', onDocumentMouseOut, false );

			}

			function onDocumentMouseOut( event ) {

				document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
				document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
				document.removeEventListener( 'mouseout', onDocumentMouseOut, false );

			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
					targetRotationOnMouseDown = targetRotation;

				}

			}

			function onDocumentTouchMove(event) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;

				}

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				parent.rotation.y += ( targetRotation - parent.rotation.y ) * 0.05;
				renderer.render( scene, camera );

			}

		</script>
	</body>
</html>