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


			
				
					
						
						
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							<html lang="en">
	<head>
		<title>three.js - WebGPU - Compute Texture</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 - Compute Texture
		</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 { texture, textureStore, wgslFn, instanceIndex, MeshBasicNodeMaterial } from 'three/nodes';

			import WebGPU from 'three/addons/capabilities/WebGPU.js';
			import WebGPURenderer from 'three/addons/renderers/webgpu/WebGPURenderer.js';
			import StorageTexture from 'three/addons/renderers/common/StorageTexture.js';

			let camera, scene, renderer;

			init();
			render();

			function init() {

				if ( WebGPU.isAvailable() === false ) {

					document.body.appendChild( WebGPU.getErrorMessage() );

					throw new Error( 'No WebGPU support' );

				}

				const aspect = window.innerWidth / window.innerHeight;
				camera = new THREE.OrthographicCamera( - aspect, aspect, 1, - 1, 0, 2 );
				camera.position.z = 1;

				scene = new THREE.Scene();

				// texture

				const width = 512, height = 512;

				const storageTexture = new StorageTexture( width, height );

				// create function

				const computeWGSL = wgslFn( `
					fn computeWGSL( storageTex: texture_storage_2d<rgba8unorm, write>, index: u32 ) -> void {

						let posX = index % ${ width };
						let posY = index / ${ width };
						let indexUV = vec2u( posX, posY );

						// https://www.shadertoy.com/view/Xst3zN

						let x = f32( posX ) / 50.0;
						let y = f32( posY ) / 50.0;

						let v1 = sin( x );
						let v2 = sin( y );
						let v3 = sin( x + y );
						let v4 = sin( sqrt( x * x + y * y ) + 5.0 );
						let v = v1 + v2 + v3 + v4;

						let PI = 3.14159265359;

						let r = sin( v );
						let g = sin( v + PI );
						let b = sin( v + PI - 0.5 );

						textureStore( storageTex, indexUV, vec4f( r, g, b, 1 ) );

					}
				` );

				// compute

				const computeWGSLCall = computeWGSL( { storageTex: textureStore( storageTexture ), index: instanceIndex } );
				const computeNode = computeWGSLCall.compute( width * height );

				const material = new MeshBasicNodeMaterial( { color: 0x00ff00 } );
				material.colorNode = texture( storageTexture );

				const plane = new THREE.Mesh( new THREE.PlaneGeometry( 1, 1 ), material );
				scene.add( plane );

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

				// compute texture
				renderer.compute( computeNode );

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

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

				const aspect = window.innerWidth / window.innerHeight;

				const frustumHeight = camera.top - camera.bottom;

				camera.left = - frustumHeight * aspect / 2;
				camera.right = frustumHeight * aspect / 2;

				camera.updateProjectionMatrix();

				render();

			}

			function render() {

				renderer.render( scene, camera );

			}

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