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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 - materials - alpha hash</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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+ <link type="text/css" rel="stylesheet" href="main.css">
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+ </head>
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+ <body>
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+ <!-- Import maps polyfill -->
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+ <!-- Remove this when import maps will be widely supported -->
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+ <script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
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+
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+ <script type="importmap">
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+ {
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+ "imports": {
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+ "three": "../build/three.module.js",
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+ "three/addons/": "./jsm/"
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+ }
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+ }
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+ </script>
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+
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+ <script type="module">
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+
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+ import * as THREE from 'three';
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+
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+ import Stats from 'three/addons/libs/stats.module.js';
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+ import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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+ import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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+
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+ import { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
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+ import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
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+ import { TAARenderPass } from 'three/addons/postprocessing/TAARenderPass.js';
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+ import { OutputPass } from 'three/addons/postprocessing/OutputPass.js';
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+
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+ let camera, scene, renderer, controls, stats, mesh, material;
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+
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+ let composer, renderPass, taaRenderPass, outputPass;
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+
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+ let needsUpdate = false;
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+
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+ const amount = parseInt( window.location.search.slice( 1 ) ) || 3;
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+ const count = Math.pow( amount, 3 );
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+
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+ const color = new THREE.Color();
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+
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+ const params = {
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+ alpha: 0.5,
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+ alphaHash: true,
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+ taa: true,
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+ sampleLevel: 2,
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+ };
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+
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+ init();
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+ animate();
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+
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+ function init() {
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+
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+ camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
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+ camera.position.set( amount, amount, amount );
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+ camera.lookAt( 0, 0, 0 );
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+
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+ scene = new THREE.Scene();
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+
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+ const light = new THREE.HemisphereLight( 0xffffff, 0x888888 );
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+ light.position.set( 0, 1, 0 );
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+ scene.add( light );
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+
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+ const geometry = new THREE.IcosahedronGeometry( 0.5, 3 );
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+
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+ material = new THREE.MeshStandardMaterial( {
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+ color: 0xffffff,
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+ alphaHash: params.alphaHash,
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+ opacity: params.alpha
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+ } );
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+
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+ mesh = new THREE.InstancedMesh( geometry, material, count );
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+
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+ let i = 0;
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+ const offset = ( amount - 1 ) / 2;
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+
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+ const matrix = new THREE.Matrix4();
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+
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+ for ( let x = 0; x < amount; x ++ ) {
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+
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+ for ( let y = 0; y < amount; y ++ ) {
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+
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+ for ( let z = 0; z < amount; z ++ ) {
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+
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+ matrix.setPosition( offset - x, offset - y, offset - z );
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+
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+ mesh.setMatrixAt( i, matrix );
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+ mesh.setColorAt( i, color.setHex( Math.random() * 0xffffff ) );
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+
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+ i ++;
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+
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+ }
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+
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+ }
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+
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+ }
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+
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+ scene.add( mesh );
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+
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+ //
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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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+ document.body.appendChild( renderer.domElement );
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+
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+ //
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+
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+ composer = new EffectComposer( renderer );
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+
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+ renderPass = new RenderPass( scene, camera );
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+ renderPass.enabled = false;
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+
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+ taaRenderPass = new TAARenderPass( scene, camera );
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+
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+ outputPass = new OutputPass();
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+
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+ composer.addPass( renderPass );
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+ composer.addPass( taaRenderPass );
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+ composer.addPass( outputPass );
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+
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+ //
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+
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+ controls = new OrbitControls( camera, renderer.domElement );
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+ controls.enableDamping = true;
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+ controls.enableZoom = false;
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+ controls.enablePan = false;
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+ controls.dampingFactor = 0.2;
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+
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+ controls.addEventListener( 'change', () => ( needsUpdate = true ) );
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+
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+ //
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+
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+ const gui = new GUI();
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+
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+ gui.add( params, 'alpha', 0, 1 ).onChange( onMaterialUpdate );
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+ gui.add( params, 'alphaHash' ).onChange( onMaterialUpdate );
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+
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+ const taaFolder = gui.addFolder( 'Temporal Anti-Aliasing' );
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+
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+ taaFolder.add( params, 'taa' ).name( 'enabled' ).onChange( () => {
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+
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+ renderPass.enabled = ! params.taa;
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+ taaRenderPass.enabled = params.taa;
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+
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+ sampleLevelCtrl.enable( params.taa );
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+
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+ needsUpdate = true;
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+
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+ } );
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+
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+ const sampleLevelCtrl = taaFolder.add( params, 'sampleLevel', 0, 6, 1 ).onChange( () => ( needsUpdate = true ) );
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+
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+ //
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+
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+ stats = new Stats();
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+ document.body.appendChild( stats.dom );
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+
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+ window.addEventListener( 'resize', onWindowResize );
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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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+ needsUpdate = true;
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+
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+ }
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+
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+ function onMaterialUpdate() {
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+
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+ material.opacity = params.alpha;
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+ material.alphaHash = params.alphaHash;
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+ material.transparent = ! params.alphaHash;
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+ material.depthWrite = params.alphaHash;
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+
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+ material.needsUpdate = true;
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+ needsUpdate = true;
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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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+ controls.update();
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+
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+ render();
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+
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+ stats.update();
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+
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+ }
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+
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+ function render() {
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+
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+ if ( needsUpdate ) {
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+
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+ taaRenderPass.accumulate = false;
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+ taaRenderPass.sampleLevel = 0;
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+
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+ needsUpdate = false;
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+
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+ } else {
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+
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+ taaRenderPass.accumulate = true;
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+ taaRenderPass.sampleLevel = params.sampleLevel;
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+
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+ }
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+
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+ composer.render();
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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>
|
Don McCurdy
