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212 lines
4.9 KiB
212 lines
4.9 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>threejs webgl - materials - transparency</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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color: #fff;
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font-family:Monospace;
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font-size:13px;
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text-align:center;
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background-color: #000;
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margin: 0px;
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overflow: hidden;
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}
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a { color: #eee }
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#info {
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position: absolute;
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top: 0px; width: 100%;
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padding: 5px;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info"><a href="http://threejs.org" target="_blank" rel="noopener">threejs</a> - Transparency with Premultiplied Alpha (right) and without (left)<br /> using RGBA8 Buffers by <a href="http://clara.io/" target="_blank" rel="noopener">Ben Houston</a>.</div>
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<script src="../build/three.js"></script>
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<script src="js/controls/OrbitControls.js"></script>
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<script src="js/WebGL.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script src="js/libs/dat.gui.min.js"></script>
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<script>
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if ( WEBGL.isWebGLAvailable() === false ) {
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document.body.appendChild( WEBGL.getWebGLErrorMessage() );
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}
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var params = { opacity: 0.25 };
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var container, stats;
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var camera, scene, renderer, controls;
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 2000 );
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camera.position.set( 0.0, 40, 40 * 3.5 );
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scene = new THREE.Scene();
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//
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var geometry = new THREE.SphereBufferGeometry( 18, 30, 30 );
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var material1 = new THREE.MeshStandardMaterial( {
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opacity: params.opacity,
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transparent: true
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} );
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var material2 = new THREE.MeshStandardMaterial( {
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opacity: params.opacity,
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premultipliedAlpha: true,
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transparent: true
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} );
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var textureLoader = new THREE.TextureLoader();
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textureLoader.load( "textures/hardwood2_diffuse.jpg", function ( map ) {
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map.anisotropy = 8;
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material1.map = map;
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material1.needsUpdate = true;
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material2.map = map;
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material2.needsUpdate = true;
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} );
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var textureLoader = new THREE.TextureLoader();
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textureLoader.load( "textures/hardwood2_roughness.jpg", function ( map ) {
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map.anisotropy = 8;
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material1.roughnessMap = map;
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material1.needsUpdate = true;
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material2.roughnessMap = map;
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material2.needsUpdate = true;
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} );
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var mesh = new THREE.Mesh( geometry, material1 );
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mesh.position.x = - 25.0;
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scene.add( mesh );
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var mesh = new THREE.Mesh( geometry, material2 );
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mesh.position.x = 25.0;
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scene.add( mesh );
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//
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var geometry = new THREE.PlaneBufferGeometry( 800, 800 );
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var material = new THREE.MeshStandardMaterial( { color: 0x333333 } );
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var mesh = new THREE.Mesh( geometry, material );
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mesh.position.y = - 50;
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mesh.rotation.x = - Math.PI * 0.5;
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scene.add( mesh );
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// Lights
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var spotLight = new THREE.SpotLight( 0xff8888 );
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spotLight.position.set( 100, 200, 100 );
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spotLight.angle = Math.PI / 6;
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spotLight.penumbra = 0.9;
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scene.add( spotLight );
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var spotLight = new THREE.SpotLight( 0x8888ff );
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spotLight.position.set( - 100, - 200, - 100 );
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spotLight.angle = Math.PI / 6;
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spotLight.penumbra = 0.9;
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scene.add( spotLight );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.shadowMap.enabled = true;
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container.appendChild( renderer.domElement );
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renderer.gammaInput = true;
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renderer.gammaOutput = true;
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stats = new Stats();
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container.appendChild( stats.dom );
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controls = new THREE.OrbitControls( camera, renderer.domElement );
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window.addEventListener( 'resize', onWindowResize, false );
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var gui = new dat.GUI();
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gui.add( params, 'opacity', 0, 1 ).onChange( function () {
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material1.opacity = params.opacity;
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material2.opacity = params.opacity;
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} );
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gui.open();
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}
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function onWindowResize() {
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var width = window.innerWidth;
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var height = window.innerHeight;
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camera.aspect = width / height;
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camera.updateProjectionMatrix();
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renderer.setSize( width, height );
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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stats.begin();
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render();
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stats.end();
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}
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function render() {
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for ( var i = 0, l = scene.children.length; i < l; i ++ ) {
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var object = scene.children[ i ];
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if ( object.geometry instanceof THREE.SphereBufferGeometry ) {
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object.rotation.x = performance.now() * 0.0002;
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object.rotation.y = - performance.now() * 0.0002;
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}
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}
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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