samien
/
three.js
зеркало из https://github.com/mrdoob/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
			<br>Texture generated using GPU Compute.
		</div>

		<script async src="https://unpkg.com/es-module-shims@1.8.0/dist/es-module-shims.js"></script>

		<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 { ShaderNode, 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';

			let camera, scene, renderer;

			init();

			function init() {

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

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

					throw new Error( 'No WebGPU support' );

				}

				camera = new THREE.OrthographicCamera( - 1.0, 1.0, 1.0, - 1.0, 0, 1 );
				camera.position.z = 1;

				scene = new THREE.Scene();

				// texture

				const width = 512, height = 512;

				const storageTexture = new THREE.Texture();
				storageTexture.image = { width, height };
				storageTexture.magFilter = THREE.LinearFilter;
				storageTexture.minFilter = THREE.NearestFilter;

				// create function

				const computeShaderNode = new ShaderNode( ( stack ) => {

					// the first function will be the main one

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

							let posX = index % ${ width };
							let posY = index / ${ width };
							let indexUV = vec2<u32>( posX, posY );
							let uv = getUV( posX, posY );

							textureStore( storageTex, indexUV, vec4f( uv, 0, 1 ) );

						}

						fn getUV( posX:u32, posY:u32 ) -> vec2<f32> {

							let uv = vec2<f32>( f32( posX ) / ${ width }.0, f32( posY ) / ${ height }.0 );

							return uv;

						}
					` );

					stack.add( computeWGSL( { storageTex: textureStore( storageTexture ), index: instanceIndex } ) );

				} );

				// compute

				const computeNode = computeShaderNode.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();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				// compute texture
				renderer.compute( computeNode );

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.updateProjectionMatrix();

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

			}

			function animate() {

				renderer.render( scene, camera );

			}

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