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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">
		<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 - compressed textures<br/>
			leaf texture by <a href="http://opengameart.org/node/10505">lauris71</a>, explosion texture by <a href="http://opengameart.org/node/7728">bart</a>
		</div>

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

		<script type="module">

			import * as THREE from 'three';

			import { DDSLoader } from 'three/addons/loaders/DDSLoader.js';

			let camera, scene, renderer;
			const meshes = [];

			init();

			function init() {

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.z = 15;

				scene = new THREE.Scene();

				const geometry = new THREE.BoxGeometry( 2, 2, 2 );

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

				DXT1 - RGB - opaque textures
				DXT3 - RGBA - transparent textures with sharp alpha transitions
				DXT5 - RGBA - transparent textures with full alpha range
				*/

				const loader = new DDSLoader();

				const map1 = loader.load( 'textures/compressed/disturb_dxt1_nomip.dds' );
				map1.minFilter = map1.magFilter = THREE.LinearFilter;
				map1.anisotropy = 4;
				map1.colorSpace = THREE.SRGBColorSpace;

				const map2 = loader.load( 'textures/compressed/disturb_dxt1_mip.dds' );
				map2.anisotropy = 4;
				map2.colorSpace = THREE.SRGBColorSpace;

				const map3 = loader.load( 'textures/compressed/hepatica_dxt3_mip.dds' );
				map3.anisotropy = 4;
				map3.colorSpace = THREE.SRGBColorSpace;

				const map4 = loader.load( 'textures/compressed/explosion_dxt5_mip.dds' );
				map4.anisotropy = 4;
				map4.colorSpace = THREE.SRGBColorSpace;

				const map5 = loader.load( 'textures/compressed/disturb_argb_nomip.dds' );
				map5.minFilter = map5.magFilter = THREE.LinearFilter;
				map5.anisotropy = 4;
				map5.colorSpace = THREE.SRGBColorSpace;

				const map6 = loader.load( 'textures/compressed/disturb_argb_mip.dds' );
				map6.anisotropy = 4;
				map6.colorSpace = THREE.SRGBColorSpace;

				const map7 = loader.load( 'textures/compressed/disturb_dx10_bc6h_signed_nomip.dds' );
				map7.anisotropy = 4;

				const map8 = loader.load( 'textures/compressed/disturb_dx10_bc6h_signed_mip.dds' );
				map8.anisotropy = 4;

				const map9 = loader.load( 'textures/compressed/disturb_dx10_bc6h_unsigned_nomip.dds' );
				map9.anisotropy = 4;

				const map10 = loader.load( 'textures/compressed/disturb_dx10_bc6h_unsigned_mip.dds' );
				map10.anisotropy = 4;


				const cubemap1 = loader.load( 'textures/compressed/Mountains.dds', function ( texture ) {

					texture.magFilter = THREE.LinearFilter;
					texture.minFilter = THREE.LinearFilter;
					texture.mapping = THREE.CubeReflectionMapping;
					texture.colorSpace = THREE.SRGBColorSpace;
					material1.needsUpdate = true;

				} );

				const cubemap2 = loader.load( 'textures/compressed/Mountains_argb_mip.dds', function ( texture ) {

					texture.magFilter = THREE.LinearFilter;
					texture.minFilter = THREE.LinearFilter;
					texture.mapping = THREE.CubeReflectionMapping;
					texture.colorSpace = THREE.SRGBColorSpace;
					material5.needsUpdate = true;

				} );

				const cubemap3 = loader.load( 'textures/compressed/Mountains_argb_nomip.dds', function ( texture ) {

					texture.magFilter = THREE.LinearFilter;
					texture.minFilter = THREE.LinearFilter;
					texture.mapping = THREE.CubeReflectionMapping;
					texture.colorSpace = THREE.SRGBColorSpace;
					material6.needsUpdate = true;

				} );

				const material1 = new THREE.MeshBasicMaterial( { map: map1, envMap: cubemap1 } );
				const material2 = new THREE.MeshBasicMaterial( { map: map2 } );
				const material3 = new THREE.MeshBasicMaterial( { map: map3, alphaTest: 0.5, side: THREE.DoubleSide } );
				const material4 = new THREE.MeshBasicMaterial( { map: map4, side: THREE.DoubleSide, blending: THREE.AdditiveBlending, depthTest: false, transparent: true } );
				const material5 = new THREE.MeshBasicMaterial( { envMap: cubemap2 } );
				const material6 = new THREE.MeshBasicMaterial( { envMap: cubemap3 } );
				const material7 = new THREE.MeshBasicMaterial( { map: map5 } );
				const material8 = new THREE.MeshBasicMaterial( { map: map6 } );
				const material9 = new THREE.MeshBasicMaterial( { map: map7 } );
				const material10 = new THREE.MeshBasicMaterial( { map: map8 } );
				const material11 = new THREE.MeshBasicMaterial( { map: map9 } );
				const material12 = new THREE.MeshBasicMaterial( { map: map10 } );

				let mesh = new THREE.Mesh( new THREE.TorusGeometry(), material1 );
				mesh.position.x = - 10;
				mesh.position.y = - 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material2 );
				mesh.position.x = - 6;
				mesh.position.y = - 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material3 );
				mesh.position.x = - 6;
				mesh.position.y = 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material4 );
				mesh.position.x = - 10;
				mesh.position.y = 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material5 );
				mesh.position.x = - 2;
				mesh.position.y = 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material6 );
				mesh.position.x = - 2;
				mesh.position.y = - 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material7 );
				mesh.position.x = 2;
				mesh.position.y = - 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material8 );
				mesh.position.x = 2;
				mesh.position.y = 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material9 );
				mesh.position.x = 6;
				mesh.position.y = - 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material10 );
				mesh.position.x = 6;
				mesh.position.y = 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material11 );
				mesh.position.x = 10;
				mesh.position.y = - 2;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material12 );
				mesh.position.x = 10;
				mesh.position.y = 2;
				scene.add( mesh );
				meshes.push( mesh );

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

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

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

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

			}

			function animate() {

				const time = Date.now() * 0.001;

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

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

				}

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>