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


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <title>three.js webgl - materials - compressed textures</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <style>
        body {
            margin: 0px;
            background-color: #050505;
            color: #fff;
            overflow: hidden;
        }

        a { color: #e00 }

        #info {
            position: absolute;
            top: 0px; width: 100%;
            color: #ffffff;
            padding: 5px;
            font-family:Monospace;
            font-size:13px;
            text-align:center;
            z-index:1000;
        }
    </style>
</head>
<body>

<div id="info">
    <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl - compressed KTX textures -
    <a href="http://opengameart.org/node/10505">Khronos Texture</a> is a lightweight file format for OpenGL
</div>

<script src="../build/three.js"></script>
<script src="js/loaders/KTXLoader.js"></script>

<script src="js/Detector.js"></script>

<script>

	/*
    This is how compressed textures are supposed to be used:

    best for desktop:
    BC1(DXT1) - opaque textures
    BC3(DXT5) - transparent textures with full alpha range

    best for iOS:
    PVR2, PVR4 - opaque textures or alpha

    best for Android:
    ETC1 - opaque textures
    ASTC_4x4, ASTC8x8 - transparent textures with full alpha range
    */

	if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

	var camera, scene, renderer;
	var meshes = [];

	init();
	animate();

	function init() {

		renderer = new THREE.WebGLRenderer( { antialias: true } );
		renderer.setPixelRatio( window.devicePixelRatio );
		renderer.setSize( window.innerWidth, window.innerHeight );
		document.body.appendChild( renderer.domElement );

		var formats = {};
		formats.pvrtc = renderer.extensions.get( 'WEBGL_compressed_texture_pvrtc' );
		formats.s3tc = renderer.extensions.get( 'WEBGL_compressed_texture_s3tc' );
		formats.etc1 = renderer.extensions.get( 'WEBGL_compressed_texture_etc1' );
		formats.astc = renderer.extensions.get( 'WEBGL_compressed_texture_astc' );

		camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
		camera.position.z = 1000;

		scene = new THREE.Scene();

		var geometry = new THREE.BoxGeometry( 200, 200, 200 );
		var material1, material2;

		// TODO: add cubemap support
		var loader = new THREE.KTXLoader();

		if ( formats.pvrtc ) {

			material1 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/disturb_PVR2bpp.ktx' )
			} );
			material2 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/lensflare_PVR4bpp.ktx' ),
				depthTest: false,
				transparent: true,
				side: THREE.DoubleSide
			} );

			meshes.push( new THREE.Mesh( geometry, material1 ) );
			meshes.push( new THREE.Mesh( geometry, material2 ) );

		}

		if ( formats.s3tc ) {

			material1 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/disturb_BC1.ktx' )
			} );
			material2 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/lensflare_BC3.ktx' ),
				depthTest: false,
				transparent: true,
				side: THREE.DoubleSide
			} );

			meshes.push( new THREE.Mesh( geometry, material1 ) );
			meshes.push( new THREE.Mesh( geometry, material2 ) );

		}

		if ( formats.etc1 ) {

			material1 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/disturb_ETC1.ktx' )
			} );

			meshes.push( new THREE.Mesh( geometry, material1 ) );

		}

		if ( formats.astc ) {

			material1 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/disturb_ASTC4x4.ktx' )
			} );
			material2 = new THREE.MeshBasicMaterial( {
				map: loader.load( 'textures/compressed/lensflare_ASTC8x8.ktx' ),
				depthTest: false,
				transparent: true,
				side: THREE.DoubleSide
			} );

			meshes.push( new THREE.Mesh( geometry, material1 ) );
			meshes.push( new THREE.Mesh( geometry, material2 ) );

		}

		var x = - meshes.length / 2 * 150;
		for ( var i = 0; i < meshes.length; ++ i, x += 300 ) {

			var mesh = meshes[ i ];
			mesh.position.x = x;
			mesh.position.y = 0;
			scene.add( mesh );

		}

		window.addEventListener( 'resize', onWindowResize, false );

	}

	function onWindowResize() {

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

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

	}

	function animate() {

		requestAnimationFrame( animate );

		var time = Date.now() * 0.001;

		for ( var i = 0; i < meshes.length; i ++ ) {

			var mesh = meshes[ i ];
			mesh.rotation.x = time;
			mesh.rotation.y = time;

		}

		renderer.render( scene, camera );

	}

</script>

</body>
</html>