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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <title>three.js webgl - postprocessing - afterimage</title>
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+ <meta charset="utf-8">
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+ <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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+ <style>
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+ body {
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+ margin: 0px;
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+ background-color: #000000;
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+ overflow: hidden;
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+ }
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+ </style>
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+ </head>
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+ <body>
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+
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+ <script src="../build/three.js"></script>
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+
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+ <script src="js/shaders/CopyShader.js"></script>
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+ <script src="js/shaders/AfterimageShader.js"></script>
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+
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+ <script src="js/postprocessing/EffectComposer.js"></script>
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+ <script src="js/postprocessing/RenderPass.js"></script>
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+ <script src="js/postprocessing/MaskPass.js"></script>
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+ <script src="js/postprocessing/ShaderPass.js"></script>
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+ <script src="js/postprocessing/AfterimagePass.js"></script>
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+
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+ <script src="js/libs/dat.gui.min.js" type="text/javascript" charset="utf-8"></script>
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+
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+ <script>
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+
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+ var camera, scene, renderer, composer;
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+ var mesh, light;
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+
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+ var afterimagePass, enable = true;
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+
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+ init();
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+ createGUI();
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+ animate();
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+
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+ function init() {
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+
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+ renderer = new THREE.WebGLRenderer();
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ document.body.appendChild( renderer.domElement );
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+
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+ camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
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+ camera.position.z = 400;
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+
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+ scene = new THREE.Scene();
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+ scene.fog = new THREE.Fog( 0x000000, 1, 1000 );
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+
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+ object = new THREE.Object3D();
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+ scene.add( object );
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+
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+ var geometry = new THREE.BoxBufferGeometry( 150, 150, 150, 2, 2, 2);
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+ var material = new THREE.MeshNormalMaterial();
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+ mesh = new THREE.Mesh( geometry, material );
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+ scene.add( mesh );
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+
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+ // postprocessing
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+
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+ composer = new THREE.EffectComposer( renderer );
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+ composer.addPass( new THREE.RenderPass( scene, camera ) );
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+
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+ afterimagePass = new THREE.AfterimagePass();
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+ afterimagePass.renderToScreen = true;
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+ composer.addPass( afterimagePass );
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+
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+ window.addEventListener( 'resize', onWindowResize, false );
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+
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+ }
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+
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+ function createGUI(){
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+
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+ var gui = new dat.GUI( { name: 'Damp setting' } );
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+ gui.add( afterimagePass.uniforms[ "damp" ], 'value', 0, 1 ).step( 0.001 );
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+ gui.add( this, 'enable' );
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+
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+ }
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+
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+ function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ camera.updateProjectionMatrix();
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+
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ composer.setSize( window.innerWidth, window.innerHeight );
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+
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+ }
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+
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+ function animate() {
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+
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+ requestAnimationFrame( animate );
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+
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+ var time = Date.now();
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+
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+ mesh.rotation.x += 0.005;
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+ mesh.rotation.y += 0.01;
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+
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+ if( enable ){
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+
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+ composer.render();
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+
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+ } else {
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+
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+ renderer.render( scene, camera );
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+
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+ }
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+
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+ }
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+
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+ </script>
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+ </body>
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+</html>
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Mr.doob