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


			
				
					
						
						
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							<html lang="en">
	<head>
		<title>three.js - WebGPU - Depth 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">
		<!-- WebGPU (For Chrome 94-101), expires 09/01/2022 -->
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	</head>
	<body>
		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> WebGPU - Depth Texture
		</div>

		<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>

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

		<script type="module">

			import * as THREE from 'three';
			import * as Nodes from 'three-nodes/Nodes.js';

			import WebGPU from './jsm/capabilities/WebGPU.js';
			import WebGPURenderer from './jsm/renderers/webgpu/WebGPURenderer.js';
			import WebGPUTextureRenderer from './jsm/renderers/webgpu/WebGPUTextureRenderer.js';

			import { smoothstep, negate, positionView, invert } from 'three-nodes/ShaderNode.js';

			import { OrbitControls } from './jsm/controls/OrbitControls.js';

			let camera, scene, controls, renderer;

			let cameraFX, sceneFX, textureRenderer;

			const dpr = window.devicePixelRatio;

			init().then( animate ).catch( error );

			async function init() {

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

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

					throw new Error( 'No WebGPU support' );

				}

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 30 );
				camera.position.z = 4;

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x222222 );

				// depth material

				const material = new Nodes.MeshBasicNodeMaterial();
				material.colorNode = invert( smoothstep( camera.near, camera.far, negate( positionView.z ) ) );

				//

				const geometry = new THREE.TorusKnotGeometry( 1, 0.3, 128, 64 );

				const count = 50;
				const scale = 5;

				for ( let i = 0; i < count; i ++ ) {

					const r = Math.random() * 2.0 * Math.PI;
					const z = ( Math.random() * 2.0 ) - 1.0;
					const zScale = Math.sqrt( 1.0 - z * z ) * scale;

					const mesh = new THREE.Mesh( geometry, material );
					mesh.position.set(
						Math.cos( r ) * zScale,
						Math.sin( r ) * zScale,
						z * scale
					);
					mesh.rotation.set( Math.random(), Math.random(), Math.random() );
					scene.add( mesh );

				}

				//

				renderer = new WebGPURenderer();
				renderer.setPixelRatio( dpr );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				textureRenderer = new WebGPUTextureRenderer( renderer );
				textureRenderer.setSize( window.innerWidth * dpr, window.innerHeight * dpr );

				window.addEventListener( 'resize', onWindowResize );

				// FX

				cameraFX = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
				sceneFX = new THREE.Scene();

				const geometryFX = new THREE.PlaneGeometry( 2, 2 );

				//

				const materialFX = new Nodes.MeshBasicNodeMaterial();
				materialFX.colorNode = new Nodes.TextureNode( textureRenderer.getTexture() );

				const quad = new THREE.Mesh( geometryFX, materialFX );
				sceneFX.add( quad );

				//

				controls = new OrbitControls( camera, renderer.domElement );
				controls.enableDamping = true;

				//

				return renderer.init();

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );
				textureRenderer.setSize( window.innerWidth * dpr, window.innerHeight * dpr );

			}

			function animate() {

				requestAnimationFrame( animate );

				textureRenderer.render( scene, camera );
				renderer.render( sceneFX, cameraFX );

			}

			function error( error ) {

				console.error( error );

			}

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