samien
/
three.js
mirror of https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<html lang="en">
	<head>
		<title>three.js webgpu - particles - soft</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<meta property="og:title" content="three.js webgpu - particles - soft">
		<meta property="og:type" content="website">
		<meta property="og:url" content="https://threejs.org/examples/webgpu_particles_soft.html">
		<meta property="og:image" content="https://threejs.org/examples/screenshots/webgpu_particles_soft.jpg">
		<link type="text/css" rel="stylesheet" href="example.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org/" target="_blank" rel="noopener" class="logo-link"></a>

			<div class="title-wrapper">
				<a href="https://threejs.org/" target="_blank" rel="noopener">three.js</a><span>WebGPU Soft Particles</span>
			</div>

			<small>Soft particles fade smoke sprites out where they intersect solid geometry.</small>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/webgpu": "../build/three.webgpu.js",
					"three/tsl": "../build/three.tsl.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three/webgpu';
			import { float, range, texture, mix, uv, color, rotateUV, positionLocal, time, uniform } from 'three/tsl';
			import { softParticles } from 'three/addons/tsl/utils/SoftParticles.js';

			import { PLYLoader } from 'three/addons/loaders/PLYLoader.js';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { Inspector } from 'three/addons/inspector/Inspector.js';

			let camera, scene, renderer;
			let controls;

			init();

			function init() {

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.set( 6, 8, 8 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x000000 );
				scene.fog = new THREE.FogExp2( 0x000000, 0.025 );

				// lights

				scene.add( new THREE.AmbientLight( 0xffffff, 0.25 ) );

				const spotLight = new THREE.SpotLight( 0xffffff, 800 );
				spotLight.position.set( 10, 15, 8 );
				spotLight.target.position.set( 0, 4, 0 );
				spotLight.angle = 0.5;
				spotLight.penumbra = 0.7;
				spotLight.distance = 0;

				scene.add( spotLight );

				//

				const loader = new PLYLoader();
				loader.load( './models/ply/binary/Lucy100k.ply', function ( geometry ) {

					geometry.computeVertexNormals();

					const material = new THREE.MeshStandardMaterial( );
					const mesh = new THREE.Mesh( geometry, material );

					mesh.position.y = 4;
					mesh.rotation.y = Math.PI;
					mesh.scale.multiplyScalar( 0.005 );
			
					scene.add( mesh );

				} );

				const groundMaterial = new THREE.MeshStandardNodeMaterial( { color: 0x444444, roughness: 1 } );
				const ground = new THREE.Mesh( new THREE.PlaneGeometry( 100, 100 ), groundMaterial );
				ground.rotation.x = - Math.PI / 2;
				scene.add( ground );

				// smoke texture

				const textureLoader = new THREE.TextureLoader();
				const map = textureLoader.load( 'textures/opengameart/smoke1.png' );
				map.colorSpace = THREE.SRGBColorSpace;

				// simple smoke particle system

				const lifeRange = range( 0.1, 1 );
				const offsetRange = range( new THREE.Vector3( - 2, 0, - 2 ), new THREE.Vector3( 2, 7, 2 ) );

				const speed = float( 0.2 );
				const scaledTime = time.add( 20 ).mul( speed );

				const lifeTime = scaledTime.mul( lifeRange ).mod( 1 );
				const scaleRange = range( 6, 8 );
				const rotateRange = range( 0.1, 2 );

				const life = lifeTime.div( lifeRange );

				const textureNode = texture( map, rotateUV( uv(), scaledTime.mul( rotateRange ) ) );

				const fade = life.smoothstep( 0, 0.3 ).mul( life.smoothstep( 1, 0.7 ) );

				// soft particles

				const softEnabled = uniform( 1 ); // 0 = hard particles, 1 = soft particles
				const softDistance = uniform( 1 ); // world-space fade distance
				const softContrast = uniform( 2 );

				const baseOpacity = textureNode.a.mul( fade );

				const smokeOpacity = mix( baseOpacity, softParticles( {
					opacity: baseOpacity,
					distance: softDistance,
					contrast: softContrast
				} ), softEnabled );

				const smokeColor = mix( color( 0x6f6f6f ), color( 0x303030 ), positionLocal.y.mul( 0.1 ).clamp() );

				// instanced sprites

				const smokeMaterial = new THREE.SpriteNodeMaterial();
				smokeMaterial.colorNode = smokeColor;
				smokeMaterial.opacityNode = smokeOpacity;
				smokeMaterial.positionNode = offsetRange.mul( lifeTime );
				smokeMaterial.scaleNode = scaleRange.mul( lifeTime.max( 0.3 ) );
				smokeMaterial.depthWrite = false;

				const smoke = new THREE.Sprite( smokeMaterial );
				smoke.count = 50;
				smoke.frustumCulled = false;
				scene.add( smoke );

				// renderer

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

				// controls

				controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = 6;
				controls.maxDistance = 20;
				controls.target.set( 0, 4, 0 );
				controls.enableDamping = true;
				controls.update();

				window.addEventListener( 'resize', onWindowResize );

				// gui

				const gui = renderer.inspector.createParameters( 'Settings' );
				gui.add( softEnabled, 'value', { hard: 0, soft: 1 } ).name( 'mode' );
				gui.add( softDistance, 'value', 0.1, 2, 0.01 ).name( 'soft distance' );
				gui.add( softContrast, 'value', 1, 6, 0.01 ).name( 'soft contrast' );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function render() {

				controls.update();

				renderer.render( scene, camera );

			}

		</script>
	</body>
</html>