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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <title>three.js webgpu - coffee smoke</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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+
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+ <div id="info">
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+ <a href="https://threejs.org" target="_blank" rel="noopener">three.js webgpu</a> - coffee smoke
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+ <br>
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+ Based on <a href="https://threejs-journey.com/lessons/coffee-smoke-shader" target="_blank" rel="noopener">Three.js Journey</a> lesson
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+ <br>
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+ Perlin noise texture from <a href="http://kitfox.com/projects/perlinNoiseMaker/" target="_blank" rel="noopener">Perlin Noise Maker</a>
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+ </div>
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+
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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/tsl": "../build/three.webgpu.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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+
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+ <script type="module">
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+
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+ import * as THREE from 'three';
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+ import { mix, mul, positionLocal, smoothstep, texture, timerLocal, tslFn, uv, vec2, vec3, vec4 } from 'three/tsl';
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+
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+ import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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+ import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
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+
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+ let camera, scene, renderer, controls;
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+
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+ init();
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+
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+ function init() {
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+
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+ camera = new THREE.PerspectiveCamera( 25, window.innerWidth / window.innerHeight, 0.1, 100 );
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+ camera.position.set( 8, 10, 12 );
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+
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+ scene = new THREE.Scene();
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+
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+ // Loaders
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+
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+ const gltfLoader = new GLTFLoader();
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+ const textureLoader = new THREE.TextureLoader();
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+
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+ // baked model
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+
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+ gltfLoader.load(
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+ './models/gltf/coffeeMug.glb',
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+ ( gltf ) => {
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+
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+ gltf.scene.getObjectByName( 'baked' ).material.map.anisotropy = 8;
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+ scene.add( gltf.scene );
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+
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+ }
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+ );
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+
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+ // geometry
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+
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+ const smokeGeometry = new THREE.PlaneGeometry( 1, 1, 16, 64 );
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+ smokeGeometry.translate( 0, 0.5, 0 );
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+ smokeGeometry.scale( 1.5, 6, 1.5 );
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+
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+ // texture
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+
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+ const noiseTexture = textureLoader.load( './textures/noises/perlin/128x128.png' );
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+ noiseTexture.wrapS = THREE.RepeatWrapping;
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+ noiseTexture.wrapT = THREE.RepeatWrapping;
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+
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+ // material
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+
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+ const smokeMaterial = new THREE.MeshBasicNodeMaterial( { transparent: true, side: THREE.DoubleSide, depthWrite: false } );
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+ const time = timerLocal();
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+
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+ // position
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+
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+ smokeMaterial.positionNode = tslFn( () => {
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+
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+ // twist
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+
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+ const twistNoiseUv = vec2( 0.5, uv().y.mul( 0.2 ).sub( time.mul( 0.005 ) ).mod( 1 ) );
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+ const twist = texture( noiseTexture, twistNoiseUv ).r.mul( 10 );
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+ positionLocal.xz.assign( positionLocal.xz.rotateUV( twist, vec2( 0 ) ) );
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+
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+ // wind
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+
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+ const windOffset = vec2(
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+ texture( noiseTexture, vec2( 0.25, time.mul( 0.01 ) ).mod( 1 ) ).r.sub( 0.5 ),
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+ texture( noiseTexture, vec2( 0.75, time.mul( 0.01 ) ).mod( 1 ) ).r.sub( 0.5 ),
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+ ).mul( uv().y.pow( 2 ).mul( 10 ) );
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+ positionLocal.addAssign( windOffset );
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+
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+ return positionLocal;
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+
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+ } )();
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+
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+ // color
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+
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+ smokeMaterial.colorNode = tslFn( () => {
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+
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+ // alpha
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+
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+ const alphaNoiseUv = uv().mul( vec2( 0.5, 0.3 ) ).add( vec2( 0, time.mul( 0.03 ).negate() ) );
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+ const alpha = mul(
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+
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+ // pattern
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+ texture( noiseTexture, alphaNoiseUv ).r.smoothstep( 0.4, 1 ),
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+
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+ // edges fade
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+ smoothstep( 0, 0.1, uv().x ),
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+ smoothstep( 1, 0.9, uv().x ),
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+ smoothstep( 0, 0.1, uv().y ),
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+ smoothstep( 1, 0.9, uv().y )
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+
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+ );
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+
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+ // color
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+
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+ const finalColor = mix( vec3( 0.6, 0.3, 0.2 ), vec3( 1, 1, 1 ), alpha.pow( 3 ) );
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+
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+ return vec4( finalColor, alpha );
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+
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+ } )();
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+
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+ // mesh
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+
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+ const smoke = new THREE.Mesh( smokeGeometry, smokeMaterial );
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+ smoke.position.y = 1.83;
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+ scene.add( smoke );
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+
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+ // renderer
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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( animate );
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+ document.body.appendChild( renderer.domElement );
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+
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+ // controls
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+
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+ controls = new OrbitControls( camera, renderer.domElement );
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+ controls.enableDamping = true;
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+ controls.minDistance = 0.1;
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+ controls.maxDistance = 50;
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+ controls.target.y = 3;
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+
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+ window.addEventListener( 'resize', onWindowResize );
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+
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+ }
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+
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+ function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ camera.updateProjectionMatrix();
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+
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+
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+ }
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+
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+ async function animate() {
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+
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+ controls.update();
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+
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+ renderer.render( scene, camera );
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+
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+ }
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+
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+ </script>
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+ </body>
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+</html>
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Bruno Simon
