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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <title>three.js webgl - materials - compressed textures</title>
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+ <meta charset="utf-8">
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+ <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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+ <style>
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+ body {
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+ margin: 0px;
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+ background-color: #050505;
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+ color: #fff;
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+ overflow: hidden;
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+ }
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+
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+ a { color: #e00 }
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+
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+ #info {
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+ position: absolute;
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+ top: 0px; width: 100%;
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+ color: #ffffff;
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+ padding: 5px;
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+ font-family:Monospace;
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+ font-size:13px;
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+ text-align:center;
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+ z-index:1000;
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+ }
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+ </style>
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+</head>
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+<body>
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+
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+<div id="info">
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+ <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl - compressed KTX textures -
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+ <a href="http://opengameart.org/node/10505">Khronos Texture</a> is a lightweight file format for OpenGL
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+</div>
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+
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+<script src="../build/three.js"></script>
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+<script src="js/loaders/KTXLoader.js"></script>
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+
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+<script src="js/Detector.js"></script>
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+
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+<script>
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+
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+ if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
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+
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+ var camera, scene, renderer;
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+ var meshes = [];
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+
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+ init();
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+ animate();
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+
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+ function init() {
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+
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+ camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
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+ camera.position.z = 1000;
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+
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+ scene = new THREE.Scene();
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+
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+ var geometry = new THREE.BoxGeometry( 200, 200, 200 );
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+
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+ /*
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+ This is how compressed textures are supposed to be used:
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+
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+ DXT1 - RGB - opaque textures
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+ DXT3 - RGBA - transparent textures with sharp alpha transitions
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+ DXT5 - RGBA - transparent textures with full alpha range
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+ */
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+
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+ var loader = new THREE.KTXLoader();
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+
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+ var map1 = loader.load( 'textures/compressed/disturb_rgb.ktx' );
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+
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+ var map2 = loader.load( 'textures/compressed/disturb_rgba.ktx' );
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+
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+ // TODO: fix cubemap support in disturb_cube.ktx
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+ var cubemap = loader.load( 'textures/compressed/disturb_rgb.ktx', function ( texture ) {
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+ texture.magFilter = THREE.LinearFilter;
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+ texture.minFilter = THREE.LinearFilter;
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+ texture.mapping = THREE.CubeReflectionMapping;
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+ } );
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+
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+ var material1 = new THREE.MeshBasicMaterial( { map: map1 } );
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+ var material2 = new THREE.MeshBasicMaterial( { map: map1 } );
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+ var material3 = new THREE.MeshBasicMaterial( { map: map2, alphaTest: 0.5, side: THREE.DoubleSide } );
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+
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+
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+ var mesh = new THREE.Mesh( new THREE.TorusGeometry( 100, 50, 32, 16 ), material1 );
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+ mesh.position.x = -200;
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+ mesh.position.y = -200;
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+ scene.add( mesh );
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+ meshes.push( mesh );
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+
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+ mesh = new THREE.Mesh( geometry, material2 );
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+ mesh.position.x = -200;
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+ mesh.position.y = 200;
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+ scene.add( mesh );
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+ meshes.push( mesh );
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+
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+ mesh = new THREE.Mesh( geometry, material3 );
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+ mesh.position.x = 200;
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+ mesh.position.y = 200;
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+ scene.add( mesh );
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+ meshes.push( mesh );
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+
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+
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+ renderer = new THREE.WebGLRenderer( { antialias: true } );
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+ renderer.setPixelRatio( window.devicePixelRatio );
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+ document.body.appendChild( renderer.domElement );
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+
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+ window.addEventListener( 'resize', onWindowResize, false );
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+
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+ }
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+
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+ function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ camera.updateProjectionMatrix();
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+
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+
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+ }
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+
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+ function animate() {
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+
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+ requestAnimationFrame( animate );
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+
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+ var time = Date.now() * 0.001;
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+
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+ for ( var i = 0; i < meshes.length; i ++ ) {
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+
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+ var mesh = meshes[ i ];
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+ mesh.rotation.x = time;
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+ mesh.rotation.y = time;
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+
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+ }
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+
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+ renderer.render( scene, camera );
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+
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+ }
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+
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+</script>
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+
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+</body>
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+</html>
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amakaseev