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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 - refraction</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 - refraction
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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.module.js",
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+ "three/addons/": "./jsm/",
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+ "three/nodes": "./jsm/nodes/Nodes.js"
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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 { MeshBasicNodeMaterial, viewportSharedTexture, texture, uv } from 'three/nodes';
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+
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+ import WebGPURenderer from 'three/addons/renderers/webgpu/WebGPURenderer.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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+ let camera, scene, renderer;
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+
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+ let cameraControls;
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+
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+ let smallSphere;
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+
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+ init();
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+
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+ function init() {
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+
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+ // scene
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+ scene = new THREE.Scene();
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+
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+ // camera
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+ camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 500 );
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+ camera.position.set( 0, 75, 160 );
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+
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+ //
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+
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+ const geometry = new THREE.IcosahedronGeometry( 5, 0 );
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+ const material = new THREE.MeshPhongMaterial( { color: 0xffffff, emissive: 0x7b7b7b, flatShading: true } );
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+ smallSphere = new THREE.Mesh( geometry, material );
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+ scene.add( smallSphere );
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+
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+ // textures
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+
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+ const loader = new THREE.TextureLoader();
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+
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+ const floorNormal = loader.load( 'textures/floors/FloorsCheckerboard_S_Normal.jpg' );
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+ floorNormal.wrapS = THREE.RepeatWrapping;
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+ floorNormal.wrapT = THREE.RepeatWrapping;
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+
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+ // refractor
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+
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+ const verticalRefractor = viewportSharedTexture();
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+
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+ const verticalNormalScale = 0.1;
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+ const verticalUVOffset = texture( floorNormal, uv().mul( 5 ) ).xy.mul( 2 ).sub( 1 ).mul( verticalNormalScale );
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+ verticalRefractor.uvNode = verticalRefractor.uvNode.add( verticalUVOffset );
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+
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+ const planeGeo = new THREE.PlaneGeometry( 100.1, 100.1 );
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+
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+ const planeRefractor = new THREE.Mesh( planeGeo, new MeshBasicNodeMaterial( {
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+ backdropNode: verticalRefractor
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+ } ) );
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+ planeRefractor.material.transparent = true;
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+ planeRefractor.position.y = 50;
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+ scene.add( planeRefractor );
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+
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+ // walls
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+
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+ const planeTop = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0xffffff } ) );
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+ planeTop.position.y = 100;
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+ planeTop.rotateX( Math.PI / 2 );
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+ scene.add( planeTop );
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+
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+ const planeBottom = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0xffffff } ) );
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+ planeBottom.rotateX( - Math.PI / 2 );
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+ scene.add( planeBottom );
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+
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+ const planeBack = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0x7f7fff } ) );
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+ planeBack.position.z = - 50;
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+ planeBack.position.y = 50;
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+ scene.add( planeBack );
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+
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+ const planeRight = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0x00ff00 } ) );
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+ planeRight.position.x = 50;
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+ planeRight.position.y = 50;
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+ planeRight.rotateY( - Math.PI / 2 );
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+ scene.add( planeRight );
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+
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+ const planeLeft = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0xff0000 } ) );
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+ planeLeft.position.x = - 50;
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+ planeLeft.position.y = 50;
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+ planeLeft.rotateY( Math.PI / 2 );
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+ scene.add( planeLeft );
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+
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+ // lights
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+
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+ const mainLight = new THREE.PointLight( 0xe7e7e7, 2.5, 250, 0 );
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+ mainLight.position.y = 60;
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+ scene.add( mainLight );
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+
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+ const greenLight = new THREE.PointLight( 0x00ff00, 0.5, 1000, 0 );
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+ greenLight.position.set( 550, 50, 0 );
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+ scene.add( greenLight );
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+
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+ const redLight = new THREE.PointLight( 0xff0000, 0.5, 1000, 0 );
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+ redLight.position.set( - 550, 50, 0 );
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+ scene.add( redLight );
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+
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+ const blueLight = new THREE.PointLight( 0xbbbbfe, 0.5, 1000, 0 );
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+ blueLight.position.set( 0, 50, 550 );
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+ scene.add( blueLight );
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+
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+ // renderer
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+
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+ renderer = new WebGPURenderer( { 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.setAnimationLoop( animate );
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+ document.body.appendChild( renderer.domElement );
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+
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+ // controls
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+
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+ cameraControls = new OrbitControls( camera, renderer.domElement );
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+ cameraControls.target.set( 0, 40, 0 );
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+ cameraControls.maxDistance = 400;
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+ cameraControls.minDistance = 10;
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+ cameraControls.update();
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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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+ const timer = Date.now() * 0.01;
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+
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+ smallSphere.position.set(
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+ Math.cos( timer * 0.1 ) * 30,
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+ Math.abs( Math.cos( timer * 0.2 ) ) * 20 + 5,
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+ Math.sin( timer * 0.1 ) * 30
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+ );
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+ smallSphere.rotation.y = ( Math.PI / 2 ) - timer * 0.1;
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+ smallSphere.rotation.z = timer * 0.8;
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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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+ </body>
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+</html>
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Michael Herzog
