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 - postprocessing - masking</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 {
				background-color: #000;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>

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

		<script src="js/shaders/CopyShader.js"></script>

		<script src="js/postprocessing/EffectComposer.js"></script>
		<script src="js/postprocessing/ClearPass.js"></script>
		<script src="js/postprocessing/TexturePass.js"></script>
		<script src="js/postprocessing/ShaderPass.js"></script>
		<script src="js/postprocessing/MaskPass.js"></script>

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

		<script>

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

			var composer, renderer;
			var box, torus;

			init();
			animate();

			function init() {

				var camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.z = 10;

				var scene1 = new THREE.Scene();
				var scene2 = new THREE.Scene();

				box = new THREE.Mesh( new THREE.BoxGeometry( 4, 4, 4 ) );
				scene1.add( box );

				torus = new THREE.Mesh( new THREE.TorusGeometry( 3, 1, 16, 32 ) );
				scene2.add( torus );

				renderer = new THREE.WebGLRenderer();
				renderer.setClearColor( 0xe0e0e0 );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.autoClear = false;
				document.body.appendChild( renderer.domElement );

				//

				var clearPass = new THREE.ClearPass();

				var clearMaskPass = new THREE.ClearMaskPass();

				var maskPass1 = new THREE.MaskPass( scene1, camera );
				var maskPass2 = new THREE.MaskPass( scene2, camera );

				var texture1 = new THREE.TextureLoader().load( 'textures/758px-Canestra_di_frutta_(Caravaggio).jpg' );
				var texture2 = new THREE.TextureLoader().load( 'textures/2294472375_24a3b8ef46_o.jpg' );

				var texturePass1 = new THREE.TexturePass( texture1 );
				var texturePass2 = new THREE.TexturePass( texture2 );

				var outputPass = new THREE.ShaderPass( THREE.CopyShader );
				outputPass.renderToScreen = true;

				var parameters = {
					minFilter: THREE.LinearFilter,
					magFilter: THREE.LinearFilter,
					format: THREE.RGBFormat,
					stencilBuffer: true
				};

				var renderTarget = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, parameters );

				composer = new THREE.EffectComposer( renderer, renderTarget );
				composer.addPass( clearPass );
				composer.addPass( maskPass1 );
				composer.addPass( texturePass1 );
				composer.addPass( clearMaskPass );
				composer.addPass( maskPass2 );
				composer.addPass( texturePass2 );
				composer.addPass( clearMaskPass );
				composer.addPass( outputPass );

			}

			function animate() {

				requestAnimationFrame( animate );

				var time = performance.now() * 0.001;

				box.position.x = Math.cos( time / 1.5 ) * 2;
				box.position.y = Math.sin( time ) * 2;
				box.rotation.x = time;
				box.rotation.y = time / 2;

				torus.position.x = Math.cos( time ) * 2;
				torus.position.y = Math.sin( time / 1.5 ) * 2;
				torus.rotation.x = time;
				torus.rotation.y = time / 2;

				renderer.clear();
				composer.render( time );

			}

		</script>
	</body>
</html>