javascript
/
three.js
mirror da https://github.com/tazdij/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>

		<script src="../build/three.js"></script>

		<!-- where curves formulas are defined -->
		<script src="js/CurveExtras.js"></script>

		<script src="js/libs/stats.min.js"></script>


		<script>
		var container, stats;

		var camera, scene, renderer, splineCamera, cameraHelper, cameraEye;

		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;

		var binormal = new THREE.Vector3();
		var normal = new THREE.Vector3();


		var pipeSpline = new THREE.CatmullRomCurve3([
				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 sampleClosedSpline = new THREE.CatmullRomCurve3([
			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),
		]);

		sampleClosedSpline.type = 'catmullrom';
		sampleClosedSpline.closed = true;

		// Keep a dictionary of Curve instances
		var splines = {
			GrannyKnot: new THREE.Curves.GrannyKnot(),
			HeartCurve: new THREE.Curves.HeartCurve(3.5),
			VivianiCurve: new THREE.Curves.VivianiCurve(70),
			KnotCurve: new THREE.Curves.KnotCurve(),
			HelixCurve: new THREE.Curves.HelixCurve(),
			TrefoilKnot: new THREE.Curves.TrefoilKnot(),
			TorusKnot: new THREE.Curves.TorusKnot(20),
			CinquefoilKnot: new THREE.Curves.CinquefoilKnot(20),
			TrefoilPolynomialKnot: new THREE.Curves.TrefoilPolynomialKnot(14),
			FigureEightPolynomialKnot: new THREE.Curves.FigureEightPolynomialKnot(),
			DecoratedTorusKnot4a: new THREE.Curves.DecoratedTorusKnot4a(),
			DecoratedTorusKnot4b: new THREE.Curves.DecoratedTorusKnot4b(),
			DecoratedTorusKnot5a: new THREE.Curves.DecoratedTorusKnot5a(),
			DecoratedTorusKnot5c: new THREE.Curves.DecoratedTorusKnot5c(),
			PipeSpline: pipeSpline,
			SampleClosedSpline: sampleClosedSpline
		};


		extrudePath = new THREE.Curves.TrefoilKnot();

		var dropdown = '<select id="dropdown" onchange="addTube(this.value)">';

		var s;
		for ( s in splines ) {
			dropdown += '<option value="' + s + '"';
			dropdown += '>' + s + '</option>';
		}

		dropdown += '</select>';

		var closed2 = true;
		var parent;
		var tube, tubeMesh;
		var animation = false, lookAhead = false;
		var scale;
		var showCameraHelper = false;

		function addTube() {

			var value = document.getElementById('dropdown').value;

			var segments = parseInt(document.getElementById('segments').value);
			closed2 = document.getElementById('closed').checked;

			var radiusSegments = parseInt(document.getElementById('radiusSegments').value);

			if (tubeMesh) parent.remove(tubeMesh);

			extrudePath = splines[value];

			tube = new THREE.TubeGeometry(extrudePath, segments, 2, radiusSegments, closed2);

			addGeometry(tube, 0xff00ff);
			setScale();

		}

		function setScale() {

			scale = parseInt( document.getElementById('scale').value );
			tubeMesh.scale.set( scale, scale, scale );

		}


		function addGeometry( geometry, color ) {

			// 3d shape

			tubeMesh = THREE.SceneUtils.createMultiMaterialObject( geometry, [
				new THREE.MeshLambertMaterial({
					color: color
				}),
				new THREE.MeshBasicMaterial({
					color: 0x000000,
					opacity: 0.3,
					wireframe: true,
					transparent: true
			})]);

			parent.add( tubeMesh );

		}

		function animateCamera( toggle ) {

			if ( toggle ) {

				animation = animation === false;
				document.getElementById('animation').value = 'Camera Spline Animation View: ' + (animation? 'ON': 'OFF');

			}

			lookAhead = document.getElementById('lookAhead').checked;

			showCameraHelper = document.getElementById('cameraHelper').checked;

			cameraHelper.visible = showCameraHelper;
			cameraEye.visible = showCameraHelper;
		}


		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 = 'Spline Extrusion Examples by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br/>Select spline:';

			info.innerHTML += dropdown;

			info.innerHTML += '<br/>Scale: <select id="scale" onchange="setScale()"><option>1</option><option>2</option><option selected>4</option><option>6</option><option>10</option></select>';
			info.innerHTML += '<br/>Extrusion Segments: <select onchange="addTube()" id="segments"><option>50</option><option selected>100</option><option>200</option><option>400</option></select>';
			info.innerHTML += '<br/>Radius Segments: <select id="radiusSegments" onchange="addTube()"><option>1</option><option>2</option><option selected>3</option><option>4</option><option>5</option><option>6</option><option>8</option><option>12</option></select>';
			info.innerHTML += '<br/>Closed:<input id="closed" onchange="addTube()" type="checkbox" checked />';

			info.innerHTML += '<br/><br/><input id="animation" type="button" onclick="animateCamera(true)" value="Camera Spline Animation View: OFF"/><br/> Look Ahead <input id="lookAhead" type="checkbox" onchange="animateCamera()" /> Camera Helper <input id="cameraHelper" type="checkbox" onchange="animateCamera()" />';

			container.appendChild(info);

			//

			camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.01, 1000);
			camera.position.set(0, 50, 500);

			scene = new THREE.Scene();

			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 );

			splineCamera = new THREE.PerspectiveCamera( 84, window.innerWidth / window.innerHeight, 0.01, 1000 );
			parent.add( splineCamera );

			cameraHelper = new THREE.CameraHelper( splineCamera );
			scene.add( cameraHelper );

			addTube();

			// Debug point

			cameraEye = new THREE.Mesh( new THREE.SphereGeometry( 5 ), new THREE.MeshBasicMaterial( { color: 0xdddddd } ) );
			parent.add( cameraEye );

			cameraHelper.visible = showCameraHelper;
			cameraEye.visible = showCameraHelper;

			//

			renderer = new THREE.WebGLRenderer( { antialias: true } );
			renderer.setClearColor( 0xf0f0f0 );
			renderer.setPixelRatio( window.devicePixelRatio );
			renderer.setSize( window.innerWidth, window.innerHeight );
			container.appendChild( renderer.domElement );

			stats = new Stats();
			container.appendChild( stats.dom );

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

			//

			window.addEventListener( 'resize', onWindowResize, false );

		}

		function onWindowResize() {

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

			camera.aspect = window.innerWidth / window.innerHeight;
			camera.updateProjectionMatrix();

			renderer.setSize( window.innerWidth, window.innerHeight );

		}

		//

		function onDocumentMouseDown(event) {

			event.preventDefault();

			renderer.domElement.addEventListener( 'mousemove', onDocumentMouseMove, false );
			renderer.domElement.addEventListener( 'mouseup', onDocumentMouseUp, false );
			renderer.domElement.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) {

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

		}

		function onDocumentMouseOut(event) {

			renderer.domElement.removeEventListener( 'mousemove', onDocumentMouseMove, false );
			renderer.domElement.removeEventListener( 'mouseup', onDocumentMouseUp, false );
			renderer.domElement.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() {

			// Try Animate Camera Along Spline
			var time = Date.now();
			var looptime = 20 * 1000;
			var t = ( time % looptime ) / looptime;

			var pos = tube.parameters.path.getPointAt( t );
			pos.multiplyScalar( scale );

			// interpolation
			var segments = tube.tangents.length;
			var pickt = t * segments;
			var pick = Math.floor( pickt );
			var pickNext = ( pick + 1 ) % segments;

			binormal.subVectors( tube.binormals[ pickNext ], tube.binormals[ pick ] );
			binormal.multiplyScalar( pickt - pick ).add( tube.binormals[ pick ] );


			var dir = tube.parameters.path.getTangentAt( t );

			var offset = 15;

			normal.copy( binormal ).cross( dir );

			// We move on a offset on its binormal
			pos.add( normal.clone().multiplyScalar( offset ) );

			splineCamera.position.copy( pos );
			cameraEye.position.copy( pos );


			// Camera Orientation 1 - default look at
			// splineCamera.lookAt( lookAt );

			// Using arclength for stablization in look ahead.
			var lookAt = tube.parameters.path.getPointAt( ( t + 30 / tube.parameters.path.getLength() ) % 1 ).multiplyScalar( scale );

			// Camera Orientation 2 - up orientation via normal
			if (!lookAhead)
			lookAt.copy( pos ).add( dir );
			splineCamera.matrix.lookAt(splineCamera.position, lookAt, normal);
			splineCamera.rotation.setFromRotationMatrix( splineCamera.matrix, splineCamera.rotation.order );

			cameraHelper.update();

			parent.rotation.y += ( targetRotation - parent.rotation.y ) * 0.05;

			renderer.render( scene, animation === true ? splineCamera : camera );

		}
	</script>

	</body>
</html>