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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - points instanced</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="container"></div>
- <div id="info"><a href="https://threejs.org" target="_blank">three.js</a> webgpu - instanced points</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, storage, Fn, instanceIndex, sin, timerLocal, float, uniform, attribute, mix, vec3 } from 'three/tsl';
- import Stats from 'three/addons/libs/stats.module.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import InstancedPoints from 'three/addons/objects/InstancedPoints.js';
- import InstancedPointsGeometry from 'three/addons/geometries/InstancedPointsGeometry.js';
- import * as GeometryUtils from 'three/addons/utils/GeometryUtils.js';
- let renderer, scene, camera, camera2, controls, backgroundNode;
- let material;
- let stats;
- let gui;
- let effectController;
- // viewport
- let insetWidth;
- let insetHeight;
- // compute
- let computeSize;
- init();
- function init() {
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
- camera.position.set( - 40, 0, 60 );
- camera2 = new THREE.PerspectiveCamera( 40, 1, 1, 1000 );
- camera2.position.copy( camera.position );
- controls = new OrbitControls( camera, renderer.domElement );
- controls.enableDamping = true;
- controls.minDistance = 10;
- controls.maxDistance = 500;
- backgroundNode = color( 0x222222 );
- effectController = {
- pulseSpeed: uniform( 6 ),
- minWidth: uniform( 6 ),
- maxWidth: uniform( 12 ),
- alphaToCoverage: true,
- };
- // Position and THREE.Color Data
- const points = GeometryUtils.hilbert3D( new THREE.Vector3( 0, 0, 0 ), 20.0, 1, 0, 1, 2, 3, 4, 5, 6, 7 );
- const spline = new THREE.CatmullRomCurve3( points );
- const divisions = Math.round( 4 * points.length );
- const point = new THREE.Vector3();
- const pointColor = new THREE.Color();
- const positions = [];
- const colors = [];
- const sizes = new Float32Array( divisions );
- for ( let i = 0, l = divisions; i < l; i ++ ) {
- const t = i / l;
- spline.getPoint( t, point );
- positions.push( point.x, point.y, point.z );
- pointColor.setHSL( t, 1.0, 0.5, THREE.SRGBColorSpace );
- colors.push( pointColor.r, pointColor.g, pointColor.b );
- sizes[ i ] = 10.0;
- }
- // Instanced Points
- const geometry = new InstancedPointsGeometry();
- geometry.setPositions( positions );
- geometry.setColors( colors );
- const instanceSizeBufferAttribute = new THREE.StorageInstancedBufferAttribute( sizes, 1 );
- geometry.setAttribute( 'instanceSize', instanceSizeBufferAttribute );
- const instanceSizeStorage = storage( instanceSizeBufferAttribute, 'float', instanceSizeBufferAttribute.count );
- computeSize = Fn( () => {
- const { pulseSpeed, minWidth, maxWidth } = effectController;
- const time = timerLocal().add( float( instanceIndex ) );
- const sizeFactor = sin( time.mul( pulseSpeed ) ).add( 1 ).div( 2 );
- instanceSizeStorage.element( instanceIndex ).assign( sizeFactor.mul( maxWidth.sub( minWidth ) ).add( minWidth ) );
- } )().compute( divisions );
-
- geometry.instanceCount = positions.length / 3; // this should not be necessary
- material = new THREE.InstancedPointsNodeMaterial( {
- color: 0xffffff,
- pointWidth: 10, // in pixel units
- vertexColors: true,
- alphaToCoverage: true,
- } );
- const attributeRange = attribute( 'instanceSize' ).sub( 1 );
- material.pointWidthNode = attribute( 'instanceSize' );
- material.pointColorNode = mix( vec3( 0.0 ), attribute( 'instanceColor' ), attributeRange.div( float( effectController.maxWidth.sub( 1 ) ) ) );
- const instancedPoints = new InstancedPoints( geometry, material );
- instancedPoints.scale.set( 1, 1, 1 );
- scene.add( instancedPoints );
- window.addEventListener( 'resize', onWindowResize );
- onWindowResize();
- stats = new Stats();
- document.body.appendChild( stats.dom );
- gui = new GUI();
- gui.add( effectController, 'alphaToCoverage' ).onChange( function ( val ) {
- material.alphaToCoverage = val;
- } );
- gui.add( effectController.minWidth, 'value', 1, 20, 1 ).name( 'minWidth' );
- gui.add( effectController.maxWidth, 'value', 2, 20, 1 ).name( 'maxWidth' );
- gui.add( effectController.pulseSpeed, 'value', 1, 20, 0.1 ).name( 'pulseSpeed' );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- insetWidth = window.innerHeight / 4; // square
- insetHeight = window.innerHeight / 4;
- camera2.aspect = insetWidth / insetHeight;
- camera2.updateProjectionMatrix();
- }
- function animate() {
- stats.update();
- // compute
- renderer.compute( computeSize );
- // main scene
- renderer.setViewport( 0, 0, window.innerWidth, window.innerHeight );
- controls.update();
- renderer.autoClear = true;
- scene.backgroundNode = null;
- renderer.render( scene, camera );
- // inset scene
- const posY = window.innerHeight - insetHeight - 20;
- renderer.clearDepth(); // important!
- renderer.setScissorTest( true );
- renderer.setScissor( 20, posY, insetWidth, insetHeight );
- renderer.setViewport( 20, posY, insetWidth, insetHeight );
- camera2.position.copy( camera.position );
- camera2.quaternion.copy( camera.quaternion );
- renderer.autoClear = false;
- scene.backgroundNode = backgroundNode;
- renderer.render( scene, camera2 );
- renderer.setScissorTest( false );
- }
- //
- </script>
- </body>
- </html>
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