javascript
/
three.js
Mirror von https://github.com/tazdij/three.js.git


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119
							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - KTX2 texture loader</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> - webgl - KTX2 texture loader<br />
			<a href="http://github.khronos.org/KTX-Specification/" target="_blank" rel="noopener">KTX2</a> with
			<a href="https://github.com/binomialLLC/basis_universal" target="_blank">Basis Universal GPU Texture Codec</a>
		</div>

		<script src="./js/libs/basis/msc_basis_transcoder.js"></script>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import { KTX2Loader } from './jsm/loaders/KTX2Loader.js';
			import { OrbitControls } from './jsm/controls/OrbitControls.js';

			var width = window.innerWidth;
			var height = window.innerHeight;

			var renderer = new THREE.WebGLRenderer( { antialias: true } );
			renderer.setSize( width, height );
			renderer.outputEncoding = THREE.sRGBEncoding;
			document.body.appendChild( renderer.domElement );

			var scene = new THREE.Scene();
			scene.background = new THREE.Color( 0xF0F0F0 );

			var camera = new THREE.PerspectiveCamera( 60, width / height, 0.1, 100 );
			camera.position.set( 2, 1.5, 1 );
			camera.lookAt( scene.position );
			scene.add(camera);

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

			// PlaneBufferGeometry UVs assume flipY=true, which compressed textures don't support.
			var geometry = flipY( new THREE.PlaneBufferGeometry() );
			var material = new THREE.MeshBasicMaterial( {
				color: 0xFFFFFF,
				side: THREE.DoubleSide
			} );
			var mesh = new THREE.Mesh(geometry, material);
			scene.add(mesh);

			var formatStrings = {
					[THREE.RGBA_ASTC_4x4_Format]: "RGBA_ASTC_4x4",
					[THREE.RGB_S3TC_DXT1_Format]: "RGB_S3TC_DXT1",
					[THREE.RGBA_S3TC_DXT5_Format]: "RGBA_S3TC_DXT5",
					[THREE.RGB_PVRTC_4BPPV1_Format]: "RGB_PVRTC_4BPPV1",
					[THREE.RGBA_PVRTC_4BPPV1_Format]: "RGBA_PVRTC_4BPPV1",
					[THREE.RGB_ETC1_Format]: "RGB_ETC1",
					[THREE.RGB_ETC2_Format]: "RGB_ETC2",
					[THREE.RGBA_ETC2_EAC_Format]: "RGB_ETC2_EAC",
			};

			// Samples: sample_etc1s.ktx2, sample_uastc.ktx2
			new KTX2Loader()
				.detectSupport( renderer )
				.load( './textures/compressed/sample_uastc.ktx2', ( texture ) => {

					console.info( `transcoded to ${formatStrings[texture.format]}` );

					material.map = texture;

					material.needsUpdate = true;

				}, ( p ) => console.log( `...${p}` ), ( e ) => console.error( e ) );

			animate();

			function animate() {

				requestAnimationFrame( animate );

				controls.update();

				renderer.render( scene, camera );

			}

			window.addEventListener( 'resize', () => {

				var width = window.innerWidth;
				var height = window.innerHeight;

				camera.aspect = width / height;
				camera.updateProjectionMatrix();
				renderer.setSize( width, height );

			}, false );

			/** Correct UVs to be compatible with `flipY=false` textures. */
			function flipY ( geometry ) {

				var uv = geometry.attributes.uv;

				for ( var i = 0; i < uv.count; i ++ ) {

					uv.setY( i, 1 - uv.getY( i ) );

				}

				return geometry;

			}

		</script>

	</body>
</html>