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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - materials - alpha hash</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
- <link type="text/css" rel="stylesheet" href="main.css">
- </head>
- <body>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import Stats from 'three/addons/libs/stats.module.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { RoomEnvironment } from 'three/addons/environments/RoomEnvironment.js';
- import { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
- import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
- import { TAARenderPass } from 'three/addons/postprocessing/TAARenderPass.js';
- import { OutputPass } from 'three/addons/postprocessing/OutputPass.js';
- let camera, scene, renderer, controls, stats, mesh, material;
- let composer, renderPass, taaRenderPass, outputPass;
- let needsUpdate = false;
- const amount = parseInt( window.location.search.slice( 1 ) ) || 3;
- const count = Math.pow( amount, 3 );
- const color = new THREE.Color();
- const params = {
- alpha: 0.5,
- alphaHash: true,
- taa: true,
- sampleLevel: 2,
- };
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
- camera.position.set( amount, amount, amount );
- camera.lookAt( 0, 0, 0 );
- scene = new THREE.Scene();
- const geometry = new THREE.IcosahedronGeometry( 0.5, 3 );
- material = new THREE.MeshStandardMaterial( {
- color: 0xffffff,
- alphaHash: params.alphaHash,
- opacity: params.alpha
- } );
- mesh = new THREE.InstancedMesh( geometry, material, count );
- let i = 0;
- const offset = ( amount - 1 ) / 2;
- const matrix = new THREE.Matrix4();
- for ( let x = 0; x < amount; x ++ ) {
- for ( let y = 0; y < amount; y ++ ) {
- for ( let z = 0; z < amount; z ++ ) {
- matrix.setPosition( offset - x, offset - y, offset - z );
- mesh.setMatrixAt( i, matrix );
- mesh.setColorAt( i, color.setHex( Math.random() * 0xffffff ) );
- i ++;
- }
- }
- }
- scene.add( mesh );
- //
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- //
- const environment = new RoomEnvironment();
- const pmremGenerator = new THREE.PMREMGenerator( renderer );
- scene.environment = pmremGenerator.fromScene( environment ).texture;
- environment.dispose();
- //
- composer = new EffectComposer( renderer );
- renderPass = new RenderPass( scene, camera );
- renderPass.enabled = false;
- taaRenderPass = new TAARenderPass( scene, camera );
- outputPass = new OutputPass();
- composer.addPass( renderPass );
- composer.addPass( taaRenderPass );
- composer.addPass( outputPass );
- //
- controls = new OrbitControls( camera, renderer.domElement );
- controls.enableZoom = false;
- controls.enablePan = false;
- controls.addEventListener( 'change', () => ( needsUpdate = true ) );
- //
- const gui = new GUI();
- gui.add( params, 'alpha', 0, 1 ).onChange( onMaterialUpdate );
- gui.add( params, 'alphaHash' ).onChange( onMaterialUpdate );
- const taaFolder = gui.addFolder( 'Temporal Anti-Aliasing' );
- taaFolder.add( params, 'taa' ).name( 'enabled' ).onChange( () => {
- renderPass.enabled = ! params.taa;
- taaRenderPass.enabled = params.taa;
- sampleLevelCtrl.enable( params.taa );
- needsUpdate = true;
- } );
- const sampleLevelCtrl = taaFolder.add( params, 'sampleLevel', 0, 6, 1 ).onChange( () => ( needsUpdate = true ) );
- //
- stats = new Stats();
- document.body.appendChild( stats.dom );
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- composer.setSize( window.innerWidth, window.innerHeight );
- needsUpdate = true;
- }
- function onMaterialUpdate() {
- material.opacity = params.alpha;
- material.alphaHash = params.alphaHash;
- material.transparent = ! params.alphaHash;
- material.depthWrite = params.alphaHash;
- material.needsUpdate = true;
- needsUpdate = true;
- }
- function animate() {
- render();
- stats.update();
- }
- function render() {
- if ( needsUpdate ) {
- taaRenderPass.accumulate = false;
- taaRenderPass.sampleLevel = 0;
- needsUpdate = false;
- } else {
- taaRenderPass.accumulate = true;
- taaRenderPass.sampleLevel = params.sampleLevel;
- }
- composer.render();
- }
- </script>
- </body>
- </html>
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