javascript
/
three.js
oglindă de https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE HTML>
<html lang="en">
	<head>
		<title>three.js webgl - materials - shaders [lava]</title>
		<meta charset="utf-8">
		<style type="text/css">
			body {
				color: #ffffff;
				font-family:Monospace;
				font-size:13px;
				text-align:center;
				font-weight: bold;

				background-color: #000000;
				margin: 0px;
				overflow: hidden;
			}

			#info {
				position: absolute;
				top: 0px; width: 100%;
				padding: 5px;
			}

			a {

				color: #ffffff;
			}

			#oldie a { color:#da0 }
		</style>
	</head>
	<body>

		<div id="container"></div>
		<div id="info"><a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - shader material demo. featuring lava shader by <a href="http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=21057" target="_blank">TheGameMaker</a></div>

		<script type="text/javascript" src="../build/Three.js"></script>

		<script type="text/javascript" src="js/Detector.js"></script>
		<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
		<script type="text/javascript" src="js/Stats.js"></script>

		<script id="fragmentShader" type="x-shader/x-fragment">

			uniform float time;
			uniform vec2 resolution;
			
			uniform float fogDensity;
			uniform vec3 fogColor;

			uniform sampler2D texture1;
			uniform sampler2D texture2;

			varying vec2 vUv;

			void main( void ) {

				vec2 position = -1.0 + 2.0 * vUv;

				vec4 noise = texture2D( texture1, vUv );
				vec2 T1 = vUv + vec2( 1.5, -1.5 ) * time  *0.02;
				vec2 T2 = vUv + vec2( -0.5, 2.0 ) * time * 0.01;
				
				T1.x += noise.x * 2.0;
				T1.y += noise.y * 2.0;
				T2.x -= noise.y * 0.2;
				T2.y += noise.z * 0.2;
				
				float p = texture2D( texture1, T1 * 2.0 ).a;
				
				vec4 color = texture2D( texture2, T2 * 2.0 );
				vec4 temp = color * ( vec4( p, p, p, p ) * 2.0 ) + ( color * color - 0.1 );
				
				if( temp.r > 1.0 ){ temp.bg += clamp( temp.r - 2.0, 0.0, 100.0 ); }
				if( temp.g > 1.0 ){ temp.rb += temp.g - 1.0; }
				if( temp.b > 1.0 ){ temp.rg += temp.b - 1.0; }
				
				gl_FragColor = temp;

				float depth = gl_FragCoord.z / gl_FragCoord.w;
				const float LOG2 = 1.442695;
				float fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );
				fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );
				
				gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );

			}
		</script>

		<script id="vertexShader" type="x-shader/x-vertex">

			uniform vec2 uvScale;
			varying vec2 vUv;

			void main()
			{

				vUv = uvScale * uv;
				vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
				gl_Position = projectionMatrix * mvPosition;

			}

		</script>

		<script type="text/javascript">

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

			var container, stats;

			var start_time;

			var camera, scene, renderer;

			var uniforms, material, mesh;

			var mouseX = 0, mouseY = 0,
			lat = 0, lon = 0, phy = 0, theta = 0;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			var postprocessing = { enabled : true };
			
			init();
			animate();

			function init() {

				container = document.getElementById( 'container' );

				camera = new THREE.Camera( 35, windowHalfX / windowHalfY, 1, 3000 );
				camera.position.z = 4;

				scene = new THREE.Scene();

				start_time = new Date().getTime();

				uniforms = {
				
					fogDensity: { type: "f", value: 0.45 },
					fogColor: 	{ type: "v3", value: new THREE.Vector3( 0, 0, 0 ) },
					time: 		{ type: "f", value: 1.0 },
					resolution: { type: "v2", value: new THREE.Vector2() },
					uvScale: 	{ type: "v2", value: new THREE.Vector2( 3.0, 1.0 ) },
					texture1: 	{ type: "t", value: 0, texture: ImageUtils.loadTexture( "textures/lava/cloud.png" ) },
					texture2: 	{ type: "t", value: 1, texture: ImageUtils.loadTexture( "textures/lava/lavatile.jpg" ) }

				};

				uniforms.texture1.texture.wrapS = uniforms.texture1.texture.wrapT = THREE.Repeat;
				uniforms.texture2.texture.wrapS = uniforms.texture2.texture.wrapT = THREE.Repeat;

				var size = 0.65;

				material = new THREE.MeshShaderMaterial( {

					uniforms: uniforms,
					vertexShader: document.getElementById( 'vertexShader' ).textContent,
					fragmentShader: document.getElementById( 'fragmentShader' ).textContent

				} );

				mesh = new THREE.Mesh( new Torus( size, 0.3, 30, 30 ), [ material /*, new THREE.MeshBasicMaterial( { color: 0x000000, wireframe: true, wireframeLinewidth: 2 } ) */ ] );
				mesh.position.x = 0;
				mesh.position.y = 0;
				mesh.rotation.x = 0.3;
				scene.addObject( mesh );


				renderer = new THREE.WebGLRenderer( { antialias: true } );
				container.appendChild( renderer.domElement );

				initPostprocessing();
				renderer.autoClear = false;

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

				onWindowResize();

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

			}

			function onWindowResize( event ) {

				uniforms.resolution.value.x = window.innerWidth;
				uniforms.resolution.value.y = window.innerHeight;

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

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

			}

			function initPostprocessing() {

				postprocessing.scene = new THREE.Scene();

				postprocessing.camera = new THREE.Camera();
				postprocessing.camera.projectionMatrix = THREE.Matrix4.makeOrtho( window.innerWidth / - 2, window.innerWidth / 2,  window.innerHeight / 2, window.innerHeight / - 2, -10000, 10000 );
				postprocessing.camera.position.z = 100;

				var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter };
				postprocessing.rtTexture1 = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, pars );
				postprocessing.rtTexture2 = new THREE.WebGLRenderTarget( 512, 512, pars );
				postprocessing.rtTexture3 = new THREE.WebGLRenderTarget( 512, 512, pars );

				var screen_shader = ShaderUtils.lib["screen"];
				var screen_uniforms = Uniforms.clone( screen_shader.uniforms );

				screen_uniforms["tDiffuse"].texture = postprocessing.rtTexture1;
				screen_uniforms["opacity"].value = 1.0;

				postprocessing.materialScreen = new THREE.MeshShaderMaterial( {

					uniforms: screen_uniforms,
					vertexShader: screen_shader.vertexShader,
					fragmentShader: screen_shader.fragmentShader,
					blending: THREE.AdditiveBlending,
					transparent: true

				} );

				var convolution_shader = ShaderUtils.lib["convolution"];
				var convolution_uniforms = Uniforms.clone( convolution_shader.uniforms );

				postprocessing.blurx = new THREE.Vector2( 0.001953125, 0.0 ),
				postprocessing.blury = new THREE.Vector2( 0.0, 0.001953125 );

				convolution_uniforms["tDiffuse"].texture = postprocessing.rtTexture1;
				convolution_uniforms["uImageIncrement"].value = postprocessing.blurx;
				convolution_uniforms["cKernel"].value = ShaderUtils.buildKernel( 4.0 );

				postprocessing.materialConvolution = new THREE.MeshShaderMaterial( {

					uniforms: convolution_uniforms,
					vertexShader:   "#define KERNEL_SIZE 25.0\n" + convolution_shader.vertexShader,
					fragmentShader: "#define KERNEL_SIZE 25\n"   + convolution_shader.fragmentShader

				} );

				var film_shader = ShaderUtils.lib["film"];
				var film_uniforms = Uniforms.clone( film_shader.uniforms );
				
				film_uniforms["tDiffuse"].texture = postprocessing.rtTexture1;
				
				postprocessing.materialFilm = new THREE.MeshShaderMaterial( { uniforms: film_uniforms, vertexShader: film_shader.vertexShader, fragmentShader: film_shader.fragmentShader } );
				postprocessing.materialFilm.uniforms.grayscale.value = 0;
				postprocessing.materialFilm.uniforms.nIntensity.value = 0.35;
				postprocessing.materialFilm.uniforms.sIntensity.value = 0.95;
				postprocessing.materialFilm.uniforms.sCount.value = 2048;

				postprocessing.quad = new THREE.Mesh( new Plane( window.innerWidth, window.innerHeight ), postprocessing.materialConvolution );
				postprocessing.quad.position.z = -500;
				postprocessing.scene.addObject( postprocessing.quad );

			}
			
			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				uniforms.time.value += 0.02;

				mesh.rotation.y += 0.00125;
				mesh.rotation.x += 0.005;

				if ( postprocessing.enabled ) {

					renderer.clear();

					// Render scene into texture

					renderer.render( scene, camera, postprocessing.rtTexture1, true );

					// Render quad with blured scene into texture (convolution pass 1)

					postprocessing.quad.materials = [ postprocessing.materialConvolution ];

					postprocessing.materialConvolution.uniforms.tDiffuse.texture = postprocessing.rtTexture1;
					postprocessing.materialConvolution.uniforms.uImageIncrement.value = postprocessing.blurx;

					renderer.render( postprocessing.scene, postprocessing.camera, postprocessing.rtTexture2, true );

					// Render quad with blured scene into texture (convolution pass 2)

					postprocessing.materialConvolution.uniforms.tDiffuse.texture = postprocessing.rtTexture2;
					postprocessing.materialConvolution.uniforms.uImageIncrement.value = postprocessing.blury;

					renderer.render( postprocessing.scene, postprocessing.camera, postprocessing.rtTexture3, true );

					// Render original scene with superimposed blur to texture

					postprocessing.quad.materials = [ postprocessing.materialScreen ];

					postprocessing.materialScreen.uniforms.tDiffuse.texture = postprocessing.rtTexture3;
					postprocessing.materialScreen.uniforms.opacity.value = 1.25;

					renderer.render( postprocessing.scene, postprocessing.camera, postprocessing.rtTexture1, false );

					// Render to screen

					postprocessing.materialFilm.uniforms.time.value += 0.01;
					postprocessing.quad.materials = [ postprocessing.materialFilm ];

					postprocessing.materialScreen.uniforms.tDiffuse.texture = postprocessing.rtTexture1;
					renderer.render( postprocessing.scene, postprocessing.camera );

				} else {

					renderer.clear();
					renderer.render( scene, camera );

				}

			}

		</script>

	</body>
</html>