javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - particles - dynamic - postprocessing</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;
				margin: 0px;
				overflow: hidden;
			}
			#info {
				color: #fff;
				position: absolute;
				top: 10px;
				width: 100%;
				text-align: center;
				z-index: 100;
				display:block;
			}
			#info a {
				color: #046;
				font-weight: bold;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>
		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl dynamic particles + postprocessing
			- models by <a href="http://sketchup.google.com/3dwarehouse/details?mid=2c6fd128fca34052adc5f5b98d513da1" target="_blank" rel="noopener">Reallusion</a>
			<a href="http://sketchup.google.com/3dwarehouse/details?mid=f526cc4abf7cb68d76cab47c765b7255" target="_blank" rel="noopener">iClone</a>,
		</div>

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

		<script src="js/loaders/OBJLoader.js"></script>

		<script src="js/shaders/ConvolutionShader.js"></script>
		<script src="js/shaders/CopyShader.js"></script>
		<script src="js/shaders/FilmShader.js"></script>
		<script src="js/shaders/FocusShader.js"></script>

		<script src="js/postprocessing/EffectComposer.js"></script>
		<script src="js/postprocessing/MaskPass.js"></script>
		<script src="js/postprocessing/RenderPass.js"></script>
		<script src="js/postprocessing/BloomPass.js"></script>
		<script src="js/postprocessing/ShaderPass.js"></script>
		<script src="js/postprocessing/FilmPass.js"></script>

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

		<script>

			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

			var camera, scene, renderer, mesh;

			var parent, meshes = [], clonemeshes = [];

			var composer, effectFocus;

			var clock = new THREE.Clock();

			var stats;

			init();
			animate();

			function init() {

				camera = new THREE.PerspectiveCamera( 20, window.innerWidth / window.innerHeight, 1, 50000 );
				camera.position.set( 0, 700, 7000 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x000104 );
				scene.fog = new THREE.FogExp2( 0x000104, 0.0000675 );

				camera.lookAt( scene.position );

				var loader = new THREE.OBJLoader();

				loader.load( 'models/obj/male02/male02.obj', function ( object ) {

					var positions = combineBuffer( object, 'position' );

					createMesh( positions, scene, 4.05,  -500, -350,   600, 0xff7744 );
					createMesh( positions, scene, 4.05,   500, -350,     0, 0xff5522 );
					createMesh( positions, scene, 4.05,  -250, -350,  1500, 0xff9922 );
					createMesh( positions, scene, 4.05,  -250, -350, -1500, 0xff99ff );

				} );

				loader.load( 'models/obj/female02/female02.obj', function ( object ) {

					var positions = combineBuffer( object, 'position' );

					createMesh( positions, scene, 4.05, -1000, -350,    0, 0xffdd44 );
					createMesh( positions, scene, 4.05,     0, -350,    0, 0xffffff );
					createMesh( positions, scene, 4.05,  1000, -350,  400, 0xff4422 );
					createMesh( positions, scene, 4.05,   250, -350, 1500, 0xff9955 );
					createMesh( positions, scene, 4.05,   250, -350, 2500, 0xff77dd );

				} );


				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth,window.innerHeight );
				renderer.autoClear = false;
				container.appendChild( renderer.domElement );

				parent = new THREE.Object3D();
				scene.add( parent );

				var grid = new THREE.Points( new THREE.PlaneBufferGeometry( 15000, 15000, 64, 64 ), new THREE.PointsMaterial( { color: 0xff0000, size: 10 } ) );
				grid.position.y = -400;
				grid.rotation.x = - Math.PI / 2;
				parent.add( grid );

				// postprocessing

				var renderModel = new THREE.RenderPass( scene, camera );
				var effectBloom = new THREE.BloomPass( 0.75 );
				var effectFilm = new THREE.FilmPass( 0.5, 0.5, 1448, false );

				effectFocus = new THREE.ShaderPass( THREE.FocusShader );

				effectFocus.uniforms[ "screenWidth" ].value = window.innerWidth;
				effectFocus.uniforms[ "screenHeight" ].value = window.innerHeight;

				effectFocus.renderToScreen = true;

				composer = new THREE.EffectComposer( renderer );

				composer.addPass( renderModel );
				composer.addPass( effectBloom );
				composer.addPass( effectFilm );
				composer.addPass( effectFocus );

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

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

			}


			function onWindowResize( event ) {

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

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

				camera.lookAt( scene.position );

				composer.reset();

				effectFocus.uniforms[ "screenWidth" ].value = window.innerWidth;
				effectFocus.uniforms[ "screenHeight" ].value = window.innerHeight;

			}

			function combineBuffer( model, bufferName ) {

				let count = 0;

				model.traverse( function ( child ) {

					if ( child.isMesh ) {

						var buffer = child.geometry.attributes[ bufferName ];

						count += buffer.array.length;

					}

				} );

				var combined = new Float32Array(count);

				let offset = 0;

				model.traverse( function ( child ) {

					if ( child.isMesh ) {

						var buffer = child.geometry.attributes[ bufferName ];

						combined.set( buffer.array, offset );
						offset += buffer.array.length;

					}

				} );

				return new THREE.BufferAttribute( combined, 3 );

			}

			function createMesh( positions, scene, scale, x, y, z, color ) {

				var geometry = new THREE.BufferGeometry();
				geometry.addAttribute( 'position', positions.clone() );
				geometry.addAttribute( 'initialPosition', positions.clone() );

				geometry.attributes.position.setDynamic( true );

				var clones = [

					[  6000, 0, -4000 ],
					[  5000, 0, 0 ],
					[  1000, 0, 5000 ],
					[  1000, 0, -5000 ],
					[  4000, 0, 2000 ],
					[ -4000, 0, 1000 ],
					[ -5000, 0, -5000 ],

					[ 0, 0, 0 ]

				];

				for ( var i = 0; i < clones.length; i ++ ) {

					var c = ( i < clones.length -1 ) ? 0x252525 : color;

					mesh = new THREE.Points( geometry, new THREE.PointsMaterial( { size: 30, color: c } ) );
					mesh.scale.x = mesh.scale.y = mesh.scale.z = scale;

					mesh.position.x = x + clones[ i ][ 0 ];
					mesh.position.y = y + clones[ i ][ 1 ];
					mesh.position.z = z + clones[ i ][ 2 ];

					parent.add( mesh );

					clonemeshes.push( { mesh: mesh, speed: 0.5 + Math.random() } );

				}

				meshes.push( {
					mesh: mesh, verticesDown: 0, verticesUp: 0, direction: 0, speed: 15, delay: Math.floor( 200 + 200 * Math.random() ),
					start: Math.floor( 100 + 200 * Math.random() ),
				} );

			}

			function animate () {

				requestAnimationFrame( animate );
				render();
				stats.update();

			}

			function render () {

				var delta = 10 * clock.getDelta();

				delta = delta < 2 ? delta : 2;

				parent.rotation.y += -0.02 * delta;

				for( var j = 0; j < clonemeshes.length; j ++ ) {

					var cm = clonemeshes[ j ];
					cm.mesh.rotation.y += -0.1 * delta * cm.speed;

				}

				for( var j = 0; j < meshes.length; j ++ ) {

					var data = meshes[ j ];
					var positions = data.mesh.geometry.attributes.position;
					var initialPositions = data.mesh.geometry.attributes.initialPosition;

					var count = positions.count;

					if ( data.start > 0 ) {

						data.start -= 1;

					} else {

						if ( data.direction === 0 ) {

							data.direction = -1;

						}

					}

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

						var px = positions.getX( i );
						var py = positions.getY( i );
						var pz = positions.getZ( i );

						// falling down
						if ( data.direction < 0 ) {

							if ( py > 0 ) {

								positions.setXYZ(
									i,
									px + 1.5 * ( 0.50 - Math.random() ) * data.speed * delta,
									py + 3.0 * ( 0.25 - Math.random() ) * data.speed * delta,
									pz + 1.5 * ( 0.50 - Math.random() ) * data.speed * delta
								);

							} else {

								data.verticesDown += 1;

							}

						}

						// rising up
						if ( data.direction > 0 ) {

							var ix = initialPositions.getX( i );
							var iy = initialPositions.getY( i );
							var iz = initialPositions.getZ( i );

							var dx = Math.abs( px - ix );
							var dy = Math.abs( py - iy );
							var dz = Math.abs( pz - iz );

							var d = dx + dy + dx;

							if ( d > 1 ) {

								positions.setXYZ(
									i,
									px - ( px - ix ) / dx * data.speed * delta * ( 0.85 - Math.random() ),
									py - ( py - iy ) / dy * data.speed * delta * ( 1 + Math.random() ),
									pz - ( pz - iz ) / dz * data.speed * delta * ( 0.85 - Math.random() ),
								);

							} else {

								data.verticesUp += 1;

							}

						}

					}

					// all vertices down
					if ( data.verticesDown >= count ) {

						if ( data.delay <= 0 ) {

							data.direction = 1;
							data.speed = 5;
							data.verticesDown = 0;
							data.delay = 320;

						} else {

							data.delay -= 1;

						}

					}

					// all vertices up
					if ( data.verticesUp >= count ) {

						if ( data.delay <= 0 ) {

							data.direction = -1;
							data.speed = 15;
							data.verticesUp = 0;
							data.delay = 120;

						} else {

							data.delay -= 1;

						}

					}

					positions.needsUpdate = true;

				}

				composer.render( 0.01 );

			}

		</script>

	</body>

</html>