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<html lang="en">
<head>
<title>three.js - WebGPU - Particles</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 - Particles
</div>
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/",
"three/nodes": "./jsm/nodes/Nodes.js"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import * as Nodes from 'three/nodes';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { range, texture, mix, uv, mul, mod, rotateUV, color, max, min, div, clamp, positionWorld, invert, timerLocal } from 'three/nodes';
import WebGPU from 'three/addons/capabilities/WebGPU.js';
import WebGPURenderer from 'three/addons/renderers/webgpu/WebGPURenderer.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
let camera, scene, renderer;
let controls;
init();
function init() {
if ( WebGPU.isAvailable() === false ) {
document.body.appendChild( WebGPU.getErrorMessage() );
throw new Error( 'No WebGPU support' );
}
const { innerWidth, innerHeight } = window;
camera = new THREE.PerspectiveCamera( 60, innerWidth / innerHeight, 1, 5000 );
camera.position.set( 1300, 500, 0 );
scene = new THREE.Scene();
//scene.fogNode = new Nodes.FogRangeNode( Nodes.color( 0x0000ff ), Nodes.float( 1500 ), Nodes.float( 2100 ) );
// textures
const textureLoader = new THREE.TextureLoader();
const map = textureLoader.load( 'textures/opengameart/smoke1.png' );
// create nodes
const lifeRange = range( .1, 1 );
const offsetRange = range( new THREE.Vector3( - 2, 3, - 2 ), new THREE.Vector3( 2, 5, 2 ) );
const timer = timerLocal( .2, 1/*100000*/ ); // @TODO: need to work with 64-bit precision
const lifeTime = mod( mul( timer, lifeRange ), 1 );
const scaleRange = range( .3, 2 );
const rotateRange = range( .1, 4 );
const life = div( lifeTime, lifeRange );
const fakeLightEffect = max( .2, invert( positionWorld.y ) );
const textureNode = texture( map, rotateUV( uv(), mul( timer, rotateRange ) ) );
const opacityNode = mul( textureNode.a, invert( life ) );
const smokeColor = mix( color( 0x2c1501 ), color( 0x222222 ), clamp( mul( positionWorld.y, 3 ) ) );
// create particles
const smokeNodeMaterial = new Nodes.SpriteNodeMaterial();
smokeNodeMaterial.colorNode = mul( mix( color( 0xf27d0c ), smokeColor, min( mul( life, 2.5 ), 1 ) ), fakeLightEffect );
smokeNodeMaterial.opacityNode = opacityNode;
smokeNodeMaterial.positionNode = mul( offsetRange, lifeTime );
smokeNodeMaterial.scaleNode = mul( scaleRange, max( .3, lifeTime ) );
smokeNodeMaterial.depthWrite = false;
smokeNodeMaterial.transparent = true;
const smokeInstancedSprite = new THREE.Mesh( new THREE.PlaneGeometry( 1, 1 ), smokeNodeMaterial );
smokeInstancedSprite.scale.setScalar( 400 );
smokeInstancedSprite.isInstancedMesh = true;
smokeInstancedSprite.count = 2000;
scene.add( smokeInstancedSprite );
//
const fireNodeMaterial = new Nodes.SpriteNodeMaterial();
fireNodeMaterial.colorNode = mix( color( 0xb72f17 ), color( 0xb72f17 ), life );
fireNodeMaterial.positionNode = mul( range( new THREE.Vector3( - 1, 1, - 1 ), new THREE.Vector3( 1, 2, 1 ) ), lifeTime );
fireNodeMaterial.scaleNode = smokeNodeMaterial.scaleNode;
fireNodeMaterial.opacityNode = opacityNode;
fireNodeMaterial.blending = THREE.AdditiveBlending;
fireNodeMaterial.transparent = true;
fireNodeMaterial.depthWrite = false;
const fireInstancedSprite = new THREE.Mesh( new THREE.PlaneGeometry( 1, 1 ), fireNodeMaterial );
fireInstancedSprite.scale.setScalar( 400 );
fireInstancedSprite.isInstancedMesh = true;
fireInstancedSprite.count = 100;
fireInstancedSprite.position.y = - 100;
fireInstancedSprite.renderOrder = 1;
scene.add( fireInstancedSprite );
//
const helper = new THREE.GridHelper( 3000, 40, 0x303030, 0x303030 );
helper.material.colorNode = new Nodes.AttributeNode( 'color' );
helper.position.y = - 75;
scene.add( helper );
//
renderer = new WebGPURenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( render );
document.body.appendChild( renderer.domElement );
//
controls = new OrbitControls( camera, renderer.domElement );
controls.maxDistance = 2700;
controls.target.set( 0, 500, 0 );
controls.update();
//
window.addEventListener( 'resize', onWindowResize );
// gui
const gui = new GUI();
gui.add( timer, 'scale', 0, 1, 0.01 ).name( 'speed' );
}
function onWindowResize() {
const { innerWidth, innerHeight } = window;
camera.aspect = innerWidth / innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( innerWidth, innerHeight );
}
function render() {
renderer.render( scene, camera );
}
</script>
</body>
</html>