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- <html lang="en">
- <head>
- <title>three.js webgpu - custom lighting model</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 - custom lighting model
- </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 { color, lights } from 'three/tsl';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- class CustomLightingModel extends THREE.LightingModel {
- direct( { lightColor, reflectedLight }, stack ) {
- reflectedLight.directDiffuse.addAssign( lightColor );
- }
- }
- let camera, scene, renderer;
- let light1, light2, light3;
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.1, 10 );
- camera.position.z = 1.5;
- scene = new THREE.Scene();
- // lights
- const sphereGeometry = new THREE.SphereGeometry( 0.02, 16, 8 );
- const addLight = ( hexColor ) => {
- const material = new THREE.NodeMaterial();
- material.colorNode = color( hexColor );
- material.lightsNode = lights(); // ignore scene lights
- const mesh = new THREE.Mesh( sphereGeometry, material );
- const light = new THREE.PointLight( hexColor, 0.1, 1 );
- light.add( mesh );
- scene.add( light );
- return light;
- };
- light1 = addLight( 0xffaa00 );
- light2 = addLight( 0x0040ff );
- light3 = addLight( 0x80ff80 );
- //light nodes ( selective lights )
- const allLightsNode = lights( [ light1, light2, light3 ] );
- // points
- const points = [];
- for ( let i = 0; i < 500_000; i ++ ) {
- const point = new THREE.Vector3().random().subScalar( 0.5 ).multiplyScalar( 3 );
- points.push( point );
- }
- const geometryPoints = new THREE.BufferGeometry().setFromPoints( points );
- const materialPoints = new THREE.PointsNodeMaterial();
- // custom lighting model
- const lightingModel = new CustomLightingModel();
- const lightingModelContext = allLightsNode.context( { lightingModel } );
- materialPoints.lightsNode = lightingModelContext;
- //
- const pointCloud = new THREE.Points( geometryPoints, materialPoints );
- scene.add( pointCloud );
- //
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- // controls
- const controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 0;
- controls.maxDistance = 4;
- // events
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- const time = Date.now() * 0.001;
- const scale = .5;
- light1.position.x = Math.sin( time * 0.7 ) * scale;
- light1.position.y = Math.cos( time * 0.5 ) * scale;
- light1.position.z = Math.cos( time * 0.3 ) * scale;
- light2.position.x = Math.cos( time * 0.3 ) * scale;
- light2.position.y = Math.sin( time * 0.5 ) * scale;
- light2.position.z = Math.sin( time * 0.7 ) * scale;
- light3.position.x = Math.sin( time * 0.7 ) * scale;
- light3.position.y = Math.cos( time * 0.3 ) * scale;
- light3.position.z = Math.sin( time * 0.5 ) * scale;
- scene.rotation.y = time * 0.1;
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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