javascript
/
three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js canvas - interactive lines</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.min.js"></script>

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

		<script>

			var container, stats;
			var camera, scene, projector, raycaster, renderer, parentTransform, sphereInter;

			var mouse = new THREE.Vector2();
			var radius = 100, theta = 0;

			var currentIntersected;

			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 = '<a href="http://threejs.org" target="_blank">three.js</a> canvas - interactive lines';
				container.appendChild( info );

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );

				scene = new THREE.Scene();

				var PI2 = Math.PI * 2;
				var program = function ( context ) {

					context.beginPath();
					context.arc( 0, 0, 0.5, 0, PI2, true );
					context.fill();

				}

				sphereInter = new THREE.Sprite(
					new THREE.SpriteCanvasMaterial( {
						color: 0xff0000,
						program: program }
					)
				);
				sphereInter.scale.x = sphereInter.scale.y = 10;
				sphereInter.visible = false;
				scene.add( sphereInter );

				var geometry = new THREE.Geometry();

				var point = new THREE.Vector3();
				var direction = new THREE.Vector3();

				for ( var i = 0; i < 100; i ++ ) {

					direction.x += Math.random() - 0.5;
					direction.y += Math.random() - 0.5;
					direction.z += Math.random() - 0.5;
					direction.normalize().multiplyScalar( 5 );

					point.add( direction );

					geometry.vertices.push( point.clone() );

				}

				parentTransform = new THREE.Object3D();
				parentTransform.position.x = Math.random() * 40 - 20;
				parentTransform.position.y = Math.random() * 40 - 20;
				parentTransform.position.z = Math.random() * 40 - 20;

				parentTransform.rotation.x = Math.random() * 2 * Math.PI;
				parentTransform.rotation.y = Math.random() * 2 * Math.PI;
				parentTransform.rotation.z = Math.random() * 2 * Math.PI;

				parentTransform.scale.x = Math.random() + 0.5;
				parentTransform.scale.y = Math.random() + 0.5;
				parentTransform.scale.z = Math.random() + 0.5;

				for ( var i = 0; i < 50; i ++ ) {

					var type = Math.random() > 0.5 ? THREE.LineStrip : THREE.LinePieces;
					var object = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: Math.random() * 0xffffff } ), type );
					
					object.position.x = Math.random() * 400 - 200;
					object.position.y = Math.random() * 400 - 200;
					object.position.z = Math.random() * 400 - 200;

					object.rotation.x = Math.random() * 2 * Math.PI;
					object.rotation.y = Math.random() * 2 * Math.PI;
					object.rotation.z = Math.random() * 2 * Math.PI;

					object.scale.x = Math.random() + 0.5;
					object.scale.y = Math.random() + 0.5;
					object.scale.z = Math.random() + 0.5;

					parentTransform.add( object );

				}

				scene.add(parentTransform);

				projector = new THREE.Projector();
				raycaster = new THREE.Raycaster();
				raycaster.linePrecision = 3;

				renderer = new THREE.CanvasRenderer();
				renderer.setClearColor( 0xf0f0f0 );
				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( 'mousemove', onDocumentMouseMove, false );

				//

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

			}

			function onWindowResize() {

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

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

			}

			function onDocumentMouseMove( event ) {

				event.preventDefault();

				mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
				mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				theta += 0.1;

				camera.position.x = radius * Math.sin( THREE.Math.degToRad( theta ) );
				camera.position.y = radius * Math.sin( THREE.Math.degToRad( theta ) );
				camera.position.z = radius * Math.cos( THREE.Math.degToRad( theta ) );
				camera.lookAt( scene.position );

				// find intersections

				var vector = new THREE.Vector3( mouse.x, mouse.y, 1 );
				projector.unprojectVector( vector, camera );

				raycaster.set( camera.position, vector.sub( camera.position ).normalize() );

				var intersects = raycaster.intersectObjects( parentTransform.children, true);

				if ( intersects.length > 0 ) {

					if ( currentIntersected !== undefined ) {

						currentIntersected.material.linewidth = 1;

					}

					currentIntersected = intersects[ 0 ].object;
					currentIntersected.material.linewidth = 5;

					sphereInter.visible = true;
					sphereInter.position.copy( intersects[ 0 ].point );

				} else {

					if ( currentIntersected !== undefined ) {

						currentIntersected.material.linewidth = 1;

					}

					currentIntersected = undefined;

					sphereInter.visible = false;

				}

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>