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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - occlusion</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>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgpu - occlusion<br />
- The plane is green when the sphere is completely occluded.
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.webgpu.js",
- "three/tsl": "../build/three.webgpu.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { nodeObject, uniform } from 'three/tsl';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- let camera, scene, renderer, controls;
- class OcclusionNode extends THREE.Node {
- constructor( testObject, normalColor, occludedColor ) {
- super( 'vec3' );
- this.updateType = THREE.NodeUpdateType.OBJECT;
- this.uniformNode = uniform( new THREE.Color() );
- this.testObject = testObject;
- this.normalColor = normalColor;
- this.occludedColor = occludedColor;
- }
- async update( frame ) {
- const isOccluded = frame.renderer.isOccluded( this.testObject );
- this.uniformNode.value.copy( isOccluded ? this.occludedColor : this.normalColor );
- }
- setup( /* builder */ ) {
- return this.uniformNode;
- }
- }
- init();
- async function init() {
- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 100 );
- camera.position.z = 7;
- scene = new THREE.Scene();
- // lights
- const ambientLight = new THREE.AmbientLight( 0xb0b0b0 );
- const light = new THREE.DirectionalLight( 0xFFFFFF, 1.0 );
- light.position.set( 0.32, 0.39, 0.7 );
- scene.add( ambientLight );
- scene.add( light );
- // models
- const planeGeometry = new THREE.PlaneGeometry( 2, 2 );
- const sphereGeometry = new THREE.SphereGeometry( 0.5 );
- const plane = new THREE.Mesh( planeGeometry, new THREE.MeshPhongNodeMaterial( { color: 0x00ff00, side: THREE.DoubleSide } ) );
- const sphere = new THREE.Mesh( sphereGeometry, new THREE.MeshPhongNodeMaterial( { color: 0xffff00 } ) );
- const instanceUniform = nodeObject( new OcclusionNode( sphere, new THREE.Color( 0x00ff00 ), new THREE.Color( 0x0000ff ) ) );
- plane.material.colorNode = instanceUniform;
- sphere.position.z = - 1;
- sphere.occlusionTest = true;
- scene.add( plane );
- scene.add( sphere );
- // renderer
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- // ensure shaders/pipelines are all complete before rendering
- await renderer.compileAsync( scene, camera );
- renderer.setAnimationLoop( render );
- document.body.appendChild( renderer.domElement );
- // controls
- controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 3;
- controls.maxDistance = 25;
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function render() {
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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