examples/webgl2_multisampled_renderbuffers.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js WebGL 2 - Multisampled Renderbuffers</title>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			html, body {
				height: 100%;
			}

			body {
				background: #ffffff;
				padding: 0;
				margin: 0;
				font-family: Monospace;
				font-size: 13px;
				overflow: hidden;
			}

			#info {
				top: 0px;
				width: 100%;
				color: #000000;
				margin: 6px 0px;
				text-align: center;
			}

			#info a {
				color: #000000;
			}

			#container {
				width: 100%;
				height: calc(100% - 80px);
			}
		</style>
	</head>

	<body>

		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - Multisampled Renderbuffers<br />
			Left scene is multi-sampled, right scene is rendered without anti-aliasing.
		</div>
		<div id="container">
		</div>

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

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

		<script src="js/postprocessing/EffectComposer.js"></script>
		<script src="js/postprocessing/RenderPass.js"></script>
		<script src="js/postprocessing/ShaderPass.js"></script>

		<script>

			if ( WEBGL.isWebGL2Available() === false ) {

				document.body.appendChild( WEBGL.getWebGL2ErrorMessage() );

			}

			var camera, scene, renderer, clock, group;

			var composer1, composer2;

			init();
			animate();

			function init() {

				var container = document.getElementById( 'container' );

				camera = new THREE.PerspectiveCamera( 45, ( window.innerWidth * 0.5 ) / window.innerHeight, 1, 2000 );
				camera.position.z = 500;

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xffffff );
				scene.fog = new THREE.Fog( 0xcccccc, 100, 1500 );

				clock = new THREE.Clock();

				//

				var hemiLight = new THREE.HemisphereLight( 0xffffff, 0x444444 );
				hemiLight.position.set( 0, 1000, 0 );
				scene.add( hemiLight );

				var dirLight = new THREE.DirectionalLight( 0xffffff, 0.8 );
				dirLight.position.set( - 3000, 1000, - 1000 );
				scene.add( dirLight );

				//

				group = new THREE.Group();

				var geometry = new THREE.IcosahedronBufferGeometry( 10, 2 );
				var material = new THREE.MeshStandardMaterial( { color: 0xee0808, flatShading: true } );

				for ( var i = 0; i < 100; i ++ ) {

					var mesh = new THREE.Mesh( geometry, material );
					mesh.position.x = Math.random() * 500 - 250;
					mesh.position.y = Math.random() * 500 - 250;
					mesh.position.z = Math.random() * 500 - 250;
					mesh.scale.setScalar( Math.random() * 2 + 1 );
					group.add( mesh );

				}

				scene.add( group );

				//

				var canvas = document.createElement( 'canvas' );
				var context = canvas.getContext( 'webgl2', { antialias: false } );

				renderer = new THREE.WebGLRenderer( { canvas: canvas, context: context } );
				renderer.autoClear = false;
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				//

				var parameters = {
					format: THREE.RGBFormat,
					stencilBuffer: false
				};

				var size = renderer.getDrawingBufferSize( new THREE.Vector2() );
				var renderTarget = new THREE.WebGLMultisampleRenderTarget( size.width, size.height, parameters );

				var renderPass = new THREE.RenderPass( scene, camera );
				var copyPass = new THREE.ShaderPass( THREE.CopyShader );

				//

				composer1 = new THREE.EffectComposer( renderer, renderTarget );
				composer1.addPass( renderPass );
				composer1.addPass( copyPass );

				//

				composer2 = new THREE.EffectComposer( renderer );
				composer2.addPass( renderPass );
				composer2.addPass( copyPass );

				//

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

			}

			function onWindowResize() {

				camera.aspect = ( window.innerWidth * 0.5 ) / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );
				composer1.setSize( window.innerWidth, window.innerHeight );
				composer2.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				requestAnimationFrame( animate );

				var halfWidth = window.innerWidth / 2;

				group.rotation.y += clock.getDelta() * 0.1;

				renderer.setViewport( 0, 0, halfWidth, window.innerHeight );

				composer1.render();

				renderer.setViewport( halfWidth, 0, halfWidth, window.innerHeight );

				composer2.render();

			}

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