three.js webgpu instancing

by GnanaSai

HTML

<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
    
<script type="importmap">
	{
		"imports": {
			"three": "https://unpkg.com/three/build/three.webgpu.js",
      "three/addons/": "https://unpkg.com/three/examples/jsm/"
		}
	}
</script>

CSS

body {
	margin: 0px;
}

JavaScript

// Simple three.js example

import * as THREE from 'three';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

let mesh, renderer, scene, camera, controls;
const dummy = new THREE.Object3D();

init();
animate();

async function init() {

    // renderer
    renderer = new THREE.WebGPURenderer({ antialias: true });
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.setPixelRatio( window.devicePixelRatio );
    document.body.appendChild( renderer.domElement );

    // scene
    scene = new THREE.Scene();
    
    // camera
    camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
    camera.position.set( 20, 20, 20 );

    // controls
    controls = new OrbitControls( camera, renderer.domElement );
       
    // axes
    scene.add( new THREE.AxesHelper( 20 ) );

    // geometry
    const geometry = new THREE.SphereGeometry( 1, 12, 8 );
    
    // material
    const material = new THREE.MeshNormalMaterial( );
    
    
    // mesh
    mesh = new THREE.InstancedMesh( geometry, material,100000 );
    scene.add(mesh)
    
    await renderer.compileAsync(scene, camera)

		mesh.count = 100;
    

    
}

function animate() {

    requestAnimationFrame( animate );
    
    //controls.update();

    renderer.renderAsync( scene, camera );

}