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187 lines
5.5 KiB
HTML
187 lines
5.5 KiB
HTML
2 months ago
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<html lang="en">
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<head>
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<title>three.js webgpu - Particles</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgpu - particles
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</div>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.webgpu.js",
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"three/webgpu": "../build/three.webgpu.js",
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"three/tsl": "../build/three.tsl.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { range, texture, mix, uv, color, rotateUV, positionLocal, time, uniform } from 'three/tsl';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import WebGPU from 'three/addons/capabilities/WebGPU.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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let camera, scene, renderer;
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let controls;
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init();
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function init() {
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if ( WebGPU.isAvailable() === false ) {
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document.body.appendChild( WebGPU.getErrorMessage() );
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throw new Error( 'No WebGPU support' );
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}
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const { innerWidth, innerHeight } = window;
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camera = new THREE.PerspectiveCamera( 60, innerWidth / innerHeight, 1, 5000 );
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camera.position.set( 1300, 500, 0 );
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scene = new THREE.Scene();
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// textures
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const textureLoader = new THREE.TextureLoader();
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const map = textureLoader.load( 'textures/opengameart/smoke1.png' );
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// create nodes
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const lifeRange = range( .1, 1 );
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const offsetRange = range( new THREE.Vector3( - 2, 3, - 2 ), new THREE.Vector3( 2, 5, 2 ) );
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const speed = uniform( .2 );
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const scaledTime = time.add( 5 ).mul( speed );
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const lifeTime = scaledTime.mul( lifeRange ).mod( 1 );
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const scaleRange = range( .3, 2 );
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const rotateRange = range( .1, 4 );
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const life = lifeTime.div( lifeRange );
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const fakeLightEffect = positionLocal.y.oneMinus().max( 0.2 );
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const textureNode = texture( map, rotateUV( uv(), scaledTime.mul( rotateRange ) ) );
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const opacityNode = textureNode.a.mul( life.oneMinus() );
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const smokeColor = mix( color( 0x2c1501 ), color( 0x222222 ), positionLocal.y.mul( 3 ).clamp() );
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// create particles
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const smokeNodeMaterial = new THREE.SpriteNodeMaterial();
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smokeNodeMaterial.colorNode = mix( color( 0xf27d0c ), smokeColor, life.mul( 2.5 ).min( 1 ) ).mul( fakeLightEffect );
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smokeNodeMaterial.opacityNode = opacityNode;
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smokeNodeMaterial.positionNode = offsetRange.mul( lifeTime );
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smokeNodeMaterial.scaleNode = scaleRange.mul( lifeTime.max( 0.3 ) );
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smokeNodeMaterial.depthWrite = false;
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const smokeInstancedSprite = new THREE.Mesh( new THREE.PlaneGeometry( 1, 1 ), smokeNodeMaterial );
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smokeInstancedSprite.scale.setScalar( 400 );
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smokeInstancedSprite.count = 2000;
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scene.add( smokeInstancedSprite );
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//
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const fireGeometry = new THREE.PlaneGeometry( 1, 1 );
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const fireCount = 1000;
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const fireNodeMaterial = new THREE.SpriteNodeMaterial();
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fireNodeMaterial.colorNode = mix( color( 0xb72f17 ), color( 0xb72f17 ), life );
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fireNodeMaterial.positionNode = range( new THREE.Vector3( - 1, 1, - 1 ), new THREE.Vector3( 1, 2, 1 ) ).mul( lifeTime );
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fireNodeMaterial.scaleNode = smokeNodeMaterial.scaleNode;
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fireNodeMaterial.opacityNode = opacityNode.mul( .5 );
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fireNodeMaterial.blending = THREE.AdditiveBlending;
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fireNodeMaterial.transparent = true;
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fireNodeMaterial.depthWrite = false;
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const fireInstancedSprite = new THREE.Mesh( fireGeometry, fireNodeMaterial );
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fireInstancedSprite.scale.setScalar( 400 );
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fireInstancedSprite.count = fireCount;
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fireInstancedSprite.position.y = - 100;
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fireInstancedSprite.renderOrder = 1;
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scene.add( fireInstancedSprite );
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// indirect draw ( optional )
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// each indirect draw call is 5 uint32 values for indexes ( different structure for non-indexed draw calls using 4 uint32 values )
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const indexCount = fireGeometry.index.array.length;
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const uint32 = new Uint32Array( 5 );
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uint32[ 0 ] = indexCount; // indexCount
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uint32[ 1 ] = fireCount; // instanceCount
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uint32[ 2 ] = 0; // firstIndex
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uint32[ 3 ] = 0; // baseVertex
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uint32[ 4 ] = 0; // firstInstance
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const indirectAttribute = new THREE.IndirectStorageBufferAttribute( uint32, 5 );
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fireGeometry.setIndirect( indirectAttribute );
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//
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const helper = new THREE.GridHelper( 3000, 40, 0x303030, 0x303030 );
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helper.position.y = - 75;
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scene.add( helper );
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//
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renderer = new THREE.WebGPURenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.setAnimationLoop( render );
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document.body.appendChild( renderer.domElement );
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//
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controls = new OrbitControls( camera, renderer.domElement );
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controls.maxDistance = 2700;
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controls.target.set( 0, 500, 0 );
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controls.update();
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//
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window.addEventListener( 'resize', onWindowResize );
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// gui
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const gui = new GUI();
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gui.add( speed, 'value', 0, 1, 0.01 ).name( 'speed' );
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}
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function onWindowResize() {
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const { innerWidth, innerHeight } = window;
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camera.aspect = innerWidth / innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( innerWidth, innerHeight );
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}
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function render() {
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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