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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - frame difference</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>
- <br/>saturated color of objects according to the difference from one frame to another
- </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 { pass, luminance, saturation } from 'three/tsl';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { Timer } from 'three/addons/misc/Timer.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- const params = {
- speed: 0
- };
- let camera, renderer, postProcessing;
- let timer, mesh, controls;
- init();
- function init() {
- renderer = new THREE.WebGPURenderer();
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- renderer.toneMapping = THREE.NeutralToneMapping;
- document.body.appendChild( renderer.domElement );
- //
- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 100 );
- camera.position.set( 1, 2, 3 );
- const scene = new THREE.Scene();
- scene.fog = new THREE.Fog( 0x0487e2, 7, 25 );
- scene.background = new THREE.Color( 0x0487e2 );
- timer = new Timer();
- const texture = new THREE.TextureLoader().load( 'textures/crate.gif' );
- texture.colorSpace = THREE.SRGBColorSpace;
- const geometry = new THREE.BoxGeometry();
- const material = new THREE.MeshBasicMaterial( { map: texture } );
- mesh = new THREE.Mesh( geometry, material );
- scene.add( mesh );
- // post processing
- postProcessing = new THREE.PostProcessing( renderer );
- const scenePass = pass( scene, camera );
- const currentTexture = scenePass.getTextureNode();
- const previousTexture = scenePass.getPreviousTextureNode();
- const frameDiff = previousTexture.sub( currentTexture ).abs();
- const saturationAmount = luminance( frameDiff ).mul( 1000 ).clamp( 0, 3 );
- postProcessing.outputNode = saturation( currentTexture, saturationAmount );
- //
- controls = new OrbitControls( camera, renderer.domElement );
- controls.minDistance = 2;
- controls.maxDistance = 10;
- controls.enableDamping = true;
- controls.dampingFactor = 0.01;
- window.addEventListener( 'resize', onWindowResize );
- //
- const gui = new GUI();
- gui.add( params, 'speed', 0, 2 );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- timer.update();
- controls.update();
- mesh.rotation.y += timer.getDelta() * 5 * params.speed;
- postProcessing.render();
- }
- </script>
- </body>
- </html>
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