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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - galaxy</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 webgpu</a> - galaxy
- <br>
- Based on <a href="https://threejs-journey.com/lessons/animated-galaxy" target="_blank" rel="noopener">Three.js Journey</a> lessons
- </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, cos, float, mix, range, sin, timerLocal, uniform, uv, vec3, vec4, PI2 } from 'three/tsl';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- let camera, scene, renderer, controls;
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 100 );
- camera.position.set( 4, 2, 5 );
- scene = new THREE.Scene();
- scene.background = new THREE.Color( 0x201919 );
- // galaxy
- const material = new THREE.SpriteNodeMaterial( {
- transparent: true,
- depthWrite: false,
- blending: THREE.AdditiveBlending
- } );
- const size = uniform( 0.08 );
- material.scaleNode = range( 0, 1 ).mul( size );
- const time = timerLocal();
- const radiusRatio = range( 0, 1 );
- const radius = radiusRatio.pow( 1.5 ).mul( 5 ).toVar();
- const branches = 3;
- const branchAngle = range( 0, branches ).floor().mul( PI2.div( branches ) );
- const angle = branchAngle.add( time.mul( radiusRatio.oneMinus() ) );
- const position = vec3(
- cos( angle ),
- 0,
- sin( angle )
- ).mul( radius );
- const randomOffset = range( vec3( - 1 ), vec3( 1 ) ).pow( 3 ).mul( radiusRatio ).add( 0.2 );
- material.positionNode = position.add( randomOffset );
- const colorInside = uniform( color( '#ffa575' ) );
- const colorOutside = uniform( color( '#311599' ) );
- const colorFinal = mix( colorInside, colorOutside, radiusRatio.oneMinus().pow( 2 ).oneMinus() );
- const alpha = float( 0.1 ).div( uv().sub( 0.5 ).length() ).sub( 0.2 );
- material.colorNode = vec4( colorFinal, alpha );
- const mesh = new THREE.InstancedMesh( new THREE.PlaneGeometry( 1, 1 ), material, 20000 );
- scene.add( mesh );
- // debug
- const gui = new GUI();
- gui.add( size, 'value', 0, 1, 0.001 ).name( 'size' );
- gui.addColor( { color: colorInside.value.getHex( THREE.SRGBColorSpace ) }, 'color' )
- .name( 'colorInside' )
- .onChange( function ( value ) {
- colorInside.value.set( value );
- } );
- gui.addColor( { color: colorOutside.value.getHex( THREE.SRGBColorSpace ) }, 'color' )
- .name( 'colorOutside' )
- .onChange( function ( value ) {
- colorOutside.value.set( value );
- } );
- // renderer
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- controls = new OrbitControls( camera, renderer.domElement );
- controls.enableDamping = true;
- controls.minDistance = 0.1;
- controls.maxDistance = 50;
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- async function animate() {
- controls.update();
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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