javascript
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three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - volume - 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 - volume - perlin
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/",
					"three/nodes": "./jsm/nodes/Nodes.js"
				}
			}
		</script>

		<script type="module">
			import * as THREE from 'three';
			import { Break, If, VolumeNodeMaterial, vec3, materialReference, tslFn } from 'three/nodes';

			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';

			import WebGPURenderer from 'three/addons/renderers/webgpu/WebGPURenderer.js';

			let renderer, scene, camera;
			let mesh;

			init();

			function init() {

				renderer = new 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 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 = tslFn( ( { map, mapValue, probe, finalColor } ) => {

					If( mapValue.greaterThan( threshold ), () => {

						const p = vec3().temp().assign( probe ).addAssign( 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>