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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - instance mesh</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 - instance mesh
- </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 { mix, range, normalWorld, oscSine, timerLocal } from 'three/tsl';
- import Stats from 'three/addons/libs/stats.module.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- let camera, scene, renderer, stats;
- let mesh;
- const amount = parseInt( window.location.search.slice( 1 ) ) || 10;
- const count = Math.pow( amount, 3 );
- const dummy = new THREE.Object3D();
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
- camera.position.set( amount * 0.9, amount * 0.9, amount * 0.9 );
- camera.lookAt( 0, 0, 0 );
- scene = new THREE.Scene();
- const material = new THREE.MeshBasicMaterial();
- // random colors between instances from 0x000000 to 0xFFFFFF
- const randomColors = range( new THREE.Color( 0x000000 ), new THREE.Color( 0xFFFFFF ) );
- material.colorNode = mix( normalWorld, randomColors, oscSine( timerLocal( .1 ) ) );
- const loader = new THREE.BufferGeometryLoader();
- loader.load( 'models/json/suzanne_buffergeometry.json', function ( geometry ) {
- geometry.computeVertexNormals();
- geometry.scale( 0.5, 0.5, 0.5 );
- mesh = new THREE.InstancedMesh( geometry, material, count );
- mesh.instanceMatrix.setUsage( THREE.DynamicDrawUsage );
- scene.add( mesh );
- //
- const gui = new GUI();
- gui.add( mesh, 'count', 1, count );
- } );
- //
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- //
- stats = new Stats();
- document.body.appendChild( stats.dom );
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- //
- function animate() {
- render();
- stats.update();
- }
- async function render() {
- if ( mesh ) {
- const time = Date.now() * 0.001;
- mesh.rotation.x = Math.sin( time / 4 );
- mesh.rotation.y = Math.sin( time / 2 );
- let i = 0;
- const offset = ( amount - 1 ) / 2;
- for ( let x = 0; x < amount; x ++ ) {
- for ( let y = 0; y < amount; y ++ ) {
- for ( let z = 0; z < amount; z ++ ) {
- dummy.position.set( offset - x, offset - y, offset - z );
- dummy.rotation.y = ( Math.sin( x / 4 + time ) + Math.sin( y / 4 + time ) + Math.sin( z / 4 + time ) );
- dummy.rotation.z = dummy.rotation.y * 2;
- dummy.updateMatrix();
- mesh.setMatrixAt( i ++, dummy.matrix );
- }
- }
- }
- }
- await renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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