javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - exporter - draco</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 {
				font-family: Monospace;
				background-color: #000;
				color: #fff;
				margin: 0px;
				overflow: hidden;
			}
			#info {
				color: #fff;
				position: absolute;
				top: 10px;
				width: 100%;
				text-align: center;
				display:block;
			}
			#info a {
				color: #046;
				font-weight: bold;
			}
		</style>
	</head>
	<body>
		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - exporter - draco<br/><br/>
			<button onclick="exportFile()">export</button>
			<button onclick="createGeometry()">geometry</button>
			<button onclick="createBufferGeometry()">buffer geometry</button>
		</div>

		<script src="../build/three.js"></script>
		
		<script src="js/libs/draco/draco_encoder.js"></script>

		<script src="js/controls/OrbitControls.js"></script>
		<script src="js/exporters/DRACOExporter.js"></script>

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

		<script>

			if ( WEBGL.isWebGLAvailable() === false ) {

				document.body.appendChild( WEBGL.getWebGLErrorMessage() );

			}

			var scene, camera, renderer, exporter, mesh;

			init();
			animate();

			function createBufferGeometry() {

				scene.remove( mesh );

				var geometry = new THREE.TorusKnotBufferGeometry( 50, 15, 200, 30 );
				var material = new THREE.MeshPhongMaterial( { color: 0x00ff00 } );
				mesh = new THREE.Mesh( geometry, material );
				mesh.castShadow = true;
				mesh.position.y = 25;
				scene.add( mesh );

			}

			function createGeometry() {

				scene.remove( mesh );

				var geometry = new THREE.TorusKnotGeometry( 50, 15, 200, 30 );
				var material = new THREE.MeshPhongMaterial( { color: 0x00ff00 } );
				mesh = new THREE.Mesh( geometry, material );
				mesh.castShadow = true;
				mesh.position.y = 25;
				scene.add( mesh );
			}

			function init() {

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 200, 100, 200 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xa0a0a0 );
				scene.fog = new THREE.Fog( 0xa0a0a0, 200, 1000 );

				exporter = new THREE.DRACOExporter();

				//

				var hemiLight = new THREE.HemisphereLight( 0xffffff, 0x444444 );
				hemiLight.position.set( 0, 200, 0 );
				scene.add( hemiLight );

				var directionalLight = new THREE.DirectionalLight( 0xffffff );
				directionalLight.position.set( 0, 200, 100 );
				directionalLight.castShadow = true;
				directionalLight.shadow.camera.top = 180;
				directionalLight.shadow.camera.bottom = - 100;
				directionalLight.shadow.camera.left = - 120;
				directionalLight.shadow.camera.right = 120;
				scene.add( directionalLight );

				// ground

				var ground = new THREE.Mesh( new THREE.PlaneBufferGeometry( 2000, 2000 ), new THREE.MeshPhongMaterial( { color: 0x999999, depthWrite: false } ) );
				ground.rotation.x = - Math.PI / 2;
				ground.receiveShadow = true;
				scene.add( ground );

				var grid = new THREE.GridHelper( 2000, 20, 0x000000, 0x000000 );
				grid.material.opacity = 0.2;
				grid.material.transparent = true;
				scene.add( grid );

				// export mesh

				var geometry = new THREE.TorusKnotBufferGeometry( 50, 15, 200, 30 );
				var material = new THREE.MeshPhongMaterial( { color: 0x00ff00 } );
				mesh = new THREE.Mesh( geometry, material );
				mesh.castShadow = true;
				mesh.position.y = 25;
				scene.add( mesh );

				//

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

				//

				var controls = new THREE.OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 25, 0 );
				controls.update();

				//

				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 );
				renderer.render( scene, camera );

			}

			function exportFile() {

				var result = exporter.parse( mesh.geometry );
				saveArrayBuffer( result, 'file.drc' );

			}

			var link = document.createElement( 'a' );
			link.style.display = 'none';
			document.body.appendChild( link );

			function save( blob, filename ) {

				link.href = URL.createObjectURL( blob );
				link.download = filename;
				link.click();

			}

			function saveArrayBuffer( buffer, filename ) {

				save( new Blob( [ buffer ], { type: 'application/octet-stream' } ), filename );

			}

		</script>

	</body>
</html>