javascript
/
three.js
spiegel van https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>threejs webgl - materials</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 {
				color: #fff;
				font-family:Monospace;
				font-size:13px;
				text-align:center;

				background-color: #000;

				margin: 0px;
				overflow: hidden;
			}

			#info {
				position: absolute;
				top: 0px; width: 100%;
				padding: 5px;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>
		<div id="info"><a href="http://threejs.org" target="_blank">threejs</a> - Transparency with Non-Premultipled Alpha (left) versus Premultiplied Alpha (right) with RGBA8 Buffers by <a href="http://clara.io/" target="_blank">Ben Houston</a>.</div>

		<script src="../build/three.min.js"></script>
		<script src="../examples/js/controls/OrbitControls.js"></script>
		<script src="../src/loaders/BinaryTextureLoader.js"></script>

		<script src="../examples/js/Detector.js"></script>
		<script src="../examples/js/libs/stats.min.js"></script>

		<script src="../examples/js/libs/dat.gui.min.js"></script>

		<script src="../examples/js/postprocessing/EffectComposer.js"></script>
		<script src="../examples/js/postprocessing/RenderPass.js"></script>
		<script src="../examples/js/postprocessing/MaskPass.js"></script>
		<script src="../examples/js/postprocessing/ShaderPass.js"></script>
		<script src="../examples/js/shaders/CopyShader.js"></script>
		<script src="../examples/js/shaders/FXAAShader.js"></script>
		<script src="../examples/js/postprocessing/BloomPass.js"></script>
		<script src="../examples/js/shaders/ConvolutionShader.js"></script>

		<script>

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

			var container, stats;
			var params = {
				opacity: 0.5,
				roughness: 1.0,
				bumpScale: 0.3
			};
			var camera, scene, renderer, controls, objects = [];
			var composer;
			var standardMaterial, standardMaterialPremultiplied;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.set( 0.0, 40, 40 * 3.5 );

				scene = new THREE.Scene();

				renderer = new THREE.WebGLRenderer( { antialias: false } );

				var roughnessTexture = THREE.ImageUtils.loadTexture( "../examples/textures/roughness_map.jpg" );
				roughnessTexture.wrapS = THREE.RepeatWrapping;
				roughnessTexture.wrapT = THREE.RepeatWrapping;
				roughnessTexture.repeat.set( 9, 2 );

				standardMaterial = new THREE.MeshStandardMaterial( {
					map: null,
					roughnessMap: roughnessTexture,
					bumpScale: - 0.05,
					bumpMap: roughnessTexture,
					color: 0xffffff,
					metalness: 0.9,
					roughness: 1.0,
					shading: THREE.SmoothShading,
					transparent: true
				} );
				var geometry = new THREE.SphereGeometry( 18, 30, 30 );
				var torusMesh1 = new THREE.Mesh( geometry, standardMaterial );
				torusMesh1.position.x = -20.0;
				torusMesh1.castShadow = true;
				scene.add( torusMesh1 );
				objects.push( torusMesh1 );

				standardMaterialPremultiplied = new THREE.MeshStandardMaterial( {
					map: null,
					roughnessMap: roughnessTexture,
					bumpScale: - 0.05,
					bumpMap: roughnessTexture,
					color: 0xffffff,
					metalness: 0.9,
					roughness: 1.0,
					shading: THREE.SmoothShading,
					blending: THREE.PremultipliedAlphaBlending,
					transparent: true
				} );

				console.log( 'standardMaterialPremultiplied', standardMaterialPremultiplied );

				var torusMesh2 = new THREE.Mesh( geometry, standardMaterialPremultiplied );
				torusMesh2.position.x = 20.0;
				torusMesh2.castShadow = true;
				scene.add( torusMesh2 );
				objects.push( torusMesh2 );

				var floorMaterial = new THREE.MeshStandardMaterial( {
					map: null,
					roughnessMap: null,
					color: 0xffffff,
					metalness: 0.0,
					roughness: 0.0,
					shading: THREE.SmoothShading
				} );

				var planeGeometry = new THREE.PlaneBufferGeometry( 200, 200 );
				var planeMesh1 = new THREE.Mesh( planeGeometry, floorMaterial );
				planeMesh1.position.y = - 50;
				planeMesh1.rotation.x = - Math.PI * 0.5;
				planeMesh1.receiveShadow = true;
				scene.add( planeMesh1 );


				// Lights

				scene.add( new THREE.AmbientLight( 0x222222 ) );

				var spotLight = new THREE.SpotLight( 0xffffff );
				spotLight.position.set( 50, 100, 50 );
				spotLight.angle = Math.PI / 7;
				spotLight.penumbra = 0.8
				spotLight.castShadow = true;
				scene.add( spotLight );

				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.shadowMap.enabled = true;
				container.appendChild( renderer.domElement );

				renderer.gammaInput = true;
				renderer.gammaOutput = true;

				composer = new THREE.EffectComposer( renderer );
				composer.setSize( window.innerWidth, window.innerHeight );

				var renderScene = new THREE.RenderPass( scene, camera );
				composer.addPass( renderScene );

				var copyPass = new THREE.ShaderPass( THREE.CopyShader );
				copyPass.renderToScreen = true;
				composer.addPass( copyPass );

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';

				container.appendChild( stats.domElement );

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

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

				var gui = new dat.GUI();

				gui.add( params, 'roughness', 0, 1 );
				gui.add( params, 'bumpScale', - 1, 1 );
				gui.add( params, 'opacity', 0, 1 );
				gui.open();

			}

			function onWindowResize() {

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

				camera.aspect = width / height;
				camera.updateProjectionMatrix();

				renderer.setSize( width, height );
				composer.setSize( width, height );

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				if ( standardMaterial !== undefined ) {


					standardMaterial.roughness = params.roughness;
					standardMaterialPremultiplied.roughness = params.roughness;

					standardMaterial.bumpScale = - 0.05 * params.bumpScale;
					standardMaterialPremultiplied.bumpScale = - 0.05 * params.bumpScale;

					standardMaterial.opacity = params.opacity;
					standardMaterialPremultiplied.opacity = params.opacity;

				}

				var timer = Date.now() * 0.00025;

				camera.lookAt( scene.position );

				for ( var i = 0, l = objects.length; i < l; i ++ ) {

					var object = objects[ i ];
					object.rotation.y += 0.005;

				}

				composer.render();

			}

		</script>

	</body>
</html>