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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - 2d texture array</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> - 2D Texture array<br />
			Scanned head data by
			<a href="https://www.codeproject.com/Articles/352270/Getting-started-with-Volume-Rendering" target="_blank" rel="noopener">Divine Augustine</a><br />
			licensed under
			<a href="https://www.codeproject.com/info/cpol10.aspx" target="_blank" rel="noopener">CPOL</a>
		</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 { texture, uv, oscTriangle, timerLocal } from 'three/tsl';

			import Stats from 'three/addons/libs/stats.module.js';
			import { unzipSync } from 'three/addons/libs/fflate.module.js';

			let camera, scene, mesh, renderer, stats;

			const planeWidth = 50;
			const planeHeight = 50;

			init();

			function init() {

				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 2000 );
				camera.position.z = 70;

				scene = new THREE.Scene();

				// width 256, height 256, depth 109, 8-bit, zip archived raw data

				new THREE.FileLoader()
					.setResponseType( 'arraybuffer' )
					.load( 'textures/3d/head256x256x109.zip', function ( data ) {

						const zip = unzipSync( new Uint8Array( data ) );
						const array = new Uint8Array( zip[ 'head256x256x109' ].buffer );

						const map = new THREE.DataArrayTexture( array, 256, 256, 109 );
						map.format = THREE.RedFormat;
						map.needsUpdate = true;

						let coord = uv();
						coord = coord.setY( coord.y.oneMinus() ); // flip y

						let oscLayers = oscTriangle( timerLocal( .5 ) ); // [ /\/ ] triangle osc animation
						oscLayers = oscLayers.add( 1 ).mul( .5 ); // convert osc range of [ -1, 1 ] to [ 0, 1 ]
						oscLayers = oscLayers.mul( map.image.depth ); // scale osc range to texture depth

						const material = new THREE.MeshBasicNodeMaterial();
						material.colorNode = texture( map, coord ).depth( oscLayers ).r.remap( 0, 1, - .1, 1.8 ); // remap to make it more visible

						const geometry = new THREE.PlaneGeometry( planeWidth, planeHeight );

						mesh = new THREE.Mesh( geometry, material );

						scene.add( mesh );

					} );

				renderer = new THREE.WebGPURenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				container.appendChild( renderer.domElement );

				stats = new Stats();
				container.appendChild( stats.dom );

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

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

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

			}

			function animate() {

				render();
				stats.update();

			}

			function render() {

				renderer.render( scene, camera );

			}

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