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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - volumetric perlin</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 - volumetric perlin
- </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 { Break, If, vec3, materialReference, Fn } from 'three/tsl';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { ImprovedNoise } from 'three/addons/math/ImprovedNoise.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- let renderer, scene, camera;
- let mesh;
- init();
- function init() {
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- scene = new THREE.Scene();
- camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
- camera.position.set( 0, 0, 2 );
- new OrbitControls( camera, renderer.domElement );
- // Texture
- const size = 128;
- const data = new Uint8Array( size * size * size );
- let i = 0;
- const perlin = new ImprovedNoise();
- const vector = new THREE.Vector3();
- for ( let z = 0; z < size; z ++ ) {
- for ( let y = 0; y < size; y ++ ) {
- for ( let x = 0; x < size; x ++ ) {
- vector.set( x, y, z ).divideScalar( size );
- const d = perlin.noise( vector.x * 6.5, vector.y * 6.5, vector.z * 6.5 );
- data[ i ++ ] = d * 128 + 128;
- }
- }
- }
- const texture = new THREE.Data3DTexture( data, size, size, size );
- texture.format = THREE.RedFormat;
- texture.minFilter = THREE.LinearFilter;
- texture.magFilter = THREE.LinearFilter;
- texture.unpackAlignment = 1;
- texture.needsUpdate = true;
- // Material
- const geometry = new THREE.BoxGeometry( 1, 1, 1 );
- const material = new THREE.VolumeNodeMaterial( {
- side: THREE.BackSide
- } );
- material.base = new THREE.Color( 0x798aa0 );
- material.map = texture;
- material.steps = 200;
- material.threshold = 0.6;
- const threshold = materialReference( 'threshold', 'float' );
- material.testNode = Fn( ( { map, mapValue, probe, finalColor } ) => {
- If( mapValue.greaterThan( threshold ), () => {
- const p = vec3( probe ).add( 0.5 );
- finalColor.rgb.assign( map.normal( p ).mul( 0.5 ).add( probe.mul( 1.5 ).add( 0.25 ) ) );
- finalColor.a.assign( 1 );
- Break();
- } );
- } );
- mesh = new THREE.Mesh( geometry, material );
- scene.add( mesh );
- //
- const parameters = { threshold: 0.6, steps: 200 };
- function update() {
- material.threshold = parameters.threshold;
- material.steps = parameters.steps;
- }
- const gui = new GUI();
- gui.add( parameters, 'threshold', 0, 1, 0.01 ).onChange( update );
- gui.add( parameters, 'steps', 0, 300, 1 ).onChange( update );
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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