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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 webgpu - roughness reflection</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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+
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+ <div id="info">
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+ <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgpu - dirty reflection
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+ </div>
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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.webgpu.js",
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+ "three/webgpu": "../build/three.webgpu.js",
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+ "three/tsl": "../build/three.tsl.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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+ import { Fn, vec2, vec4, texture, uv, textureBicubic, rangeFogFactor, reflector, time } from 'three/tsl';
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+
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+ import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
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+
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+ import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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+
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+ import Stats from 'three/addons/libs/stats.module.js';
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+
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+ let camera, scene, renderer;
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+ let controls;
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+ let stats;
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+
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+ init();
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+
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+ async function init() {
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+
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+ camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.25, 30 );
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+ camera.position.set( - 4, 2, 4 );
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+ camera.lookAt( 0, .4, 0 );
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+
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+ scene = new THREE.Scene();
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+
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+ //
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+
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+ new RGBELoader()
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+ .setPath( 'textures/equirectangular/' )
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+ .load( 'moonless_golf_1k.hdr', function ( texture ) {
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+
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+ texture.mapping = THREE.EquirectangularReflectionMapping;
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+
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+ scene.background = texture;
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+ scene.environment = texture;
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+
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+ } );
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+
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+ // textures
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+
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+ const textureLoader = new THREE.TextureLoader();
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+
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+ const uvMap = textureLoader.load( 'textures/uv_grid_directx.jpg' );
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+ uvMap.colorSpace = THREE.SRGBColorSpace;
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+
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+ const perlinMap = textureLoader.load( './textures/noises/perlin/rgb-256x256.png' );
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+ perlinMap.wrapS = THREE.RepeatWrapping;
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+ perlinMap.wrapT = THREE.RepeatWrapping;
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+ perlinMap.colorSpace = THREE.SRGBColorSpace;
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+
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+ // uv map for debugging
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+
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+ const uvMaterial = new THREE.MeshStandardNodeMaterial( {
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+ map: uvMap,
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+ emissiveMap: uvMap,
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+ emissive: 0xffffff,
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+ side: THREE.DoubleSide
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+ } );
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+
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+ const uvMesh = new THREE.Mesh( new THREE.PlaneGeometry( 2, 2 ), uvMaterial );
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+ uvMesh.position.set( 0, 1, 0 );
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+ scene.add( uvMesh );
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+
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+ // reflection
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+
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+ const reflection = reflector( { resolution: .5, bounces: false, generateMipmaps: true } ); // 0.5 is half of the rendering view
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+ reflection.target.rotateX( - Math.PI / 2 );
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+ scene.add( reflection.target );
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+
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+ const animatedUV = uv().mul( 10 ).add( vec2( time.mul( .1 ), 0 ) );
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+ const roughness = texture( perlinMap, animatedUV ).r.mul( 2 ).saturate();
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+
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+ const floorMaterial = new THREE.MeshStandardNodeMaterial();
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+ floorMaterial.transparent = true;
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+ floorMaterial.metalness = 1;
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+ floorMaterial.roughnessNode = roughness.mul( .2 );
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+ floorMaterial.colorNode = Fn( () => {
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+
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+ // blur reflection using textureBicubic()
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+ const dirtyReflection = textureBicubic( reflection, roughness.mul( .9 ) ).rgb;
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+
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+ // falloff opacity by distance like an opacity-fog
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+ const opacity = rangeFogFactor( 7, 25 ).oneMinus();
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+
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+ return vec4( dirtyReflection.rgb, opacity );
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+
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+ } )();
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+
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+ const floor = new THREE.Mesh( new THREE.BoxGeometry( 50, .001, 50 ), floorMaterial );
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+ floor.position.set( 0, 0, 0 );
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+ scene.add( floor );
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+
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+ // renderer
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+
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+ renderer = new THREE.WebGPURenderer();
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ renderer.setAnimationLoop( animate );
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+ renderer.toneMapping = THREE.NeutralToneMapping;
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+ renderer.toneMappingExposure = 2;
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+ document.body.appendChild( renderer.domElement );
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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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+ controls = new OrbitControls( camera, renderer.domElement );
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+ controls.minDistance = 1;
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+ controls.maxDistance = 10;
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+ controls.maxPolarAngle = Math.PI / 2;
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+ controls.autoRotate = true;
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+ controls.autoRotateSpeed = - .1;
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+ controls.target.set( 0, .5, 0 );
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+ controls.update();
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+
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+ // events
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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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+
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+ }
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+
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+ function animate() {
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+
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+ stats.update();
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+
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+ controls.update();
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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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+ </script>
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+
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+ </body>
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+</html>
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sunag
