examples/webgl_marching_cubes.html

﻿<!DOCTYPE HTML>
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<head>
	<title>three.js webgl - marching cubes</title>
	<meta charset="utf-8">
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		body {
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		  width: 475px;
		  margin: 5em auto 0;

		  display: none;
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	</style>
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<body>

	<div id="container"></div>
	<div id="info">
		<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> -
		marching cubes -
		[based on greggman's <a href="http://webglsamples.googlecode.com/hg/blob/blob.html">blob</a>, original code by Henrik Rydgård]
	</div>

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

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

	<script src="js/ShaderExtras.js"></script>
	<script src="js/ShaderToon.js"></script>

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

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


	<script src="js/Detector.js"></script>
	<script src="js/Stats.js"></script>
	<script src="js/DAT.GUI.min.js"></script>


	<script>
		if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

		var MARGIN = 0;

		var SCREEN_WIDTH = window.innerWidth;
		var SCREEN_HEIGHT = window.innerHeight - 2 * MARGIN;

		var container, stats;

		var camera, scene, renderer;

		var mesh, texture, geometry, materials, material, current_material;

		var light, pointLight, ambientLight;

		var effect, resolution, numBlobs;

		var composer, effectFXAA, hblur, vblur;

		var effectController;

		var time = 0;
		var clock = new THREE.Clock();

		init();
		animate();

		function init() {

			container = document.getElementById( 'container' );

			// SCENE

			scene = new THREE.Scene();

			// CAMERA

			camera = new THREE.PerspectiveCamera( 45, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
			camera.position.set( -500, 500, 1500 );

			scene.add( camera );

			// CONTROLS

			controls = new THREE.TrackballControls( camera );

			// LIGHTS

			light = new THREE.DirectionalLight( 0xffffff );
			light.position.set( 0.5, 0.5, 1 );
			scene.add( light );

			pointLight = new THREE.PointLight( 0xff3300 );
			pointLight.position.set( 0, 0, 100 );
			scene.add( pointLight );

			ambientLight = new THREE.AmbientLight( 0x080808 );
			scene.add( ambientLight );

			// MATERIALS

			materials = generateMaterials();
			current_material = "shiny";

			// MARCHING CUBES

			resolution = 28;
			numBlobs = 10;

			effect = new THREE.MarchingCubes( resolution, materials[ current_material ].m );
			effect.position.set( 0, 0, 0 );
			effect.scale.set( 700, 700, 700 );
			scene.add( effect );

			// RENDERER

			renderer = new THREE.WebGLRenderer( { clearColor: 0x050505, clearAlpha: 1, alpha: false } );
			renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );

			renderer.domElement.style.position = "absolute";
			renderer.domElement.style.top = MARGIN + "px";
			renderer.domElement.style.left = "0px";

			container.appendChild( renderer.domElement );
			//

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

			// STATS

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

			stats.domElement.children[ 0 ].children[ 0 ].style.color = "#888";
			stats.domElement.children[ 0 ].style.background = "transparent";
			stats.domElement.children[ 0 ].children[ 1 ].style.display = "none";

			// COMPOSER

			renderer.autoClear = false;

			renderTargetParameters = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat, stencilBuffer: false };
			renderTarget = new THREE.WebGLRenderTarget( SCREEN_WIDTH, SCREEN_HEIGHT, renderTargetParameters );

			effectFXAA = new THREE.ShaderPass( THREE.ShaderExtras[ "fxaa" ] );

			hblur = new THREE.ShaderPass( THREE.ShaderExtras[ "horizontalTiltShift" ] );
			vblur = new THREE.ShaderPass( THREE.ShaderExtras[ "verticalTiltShift" ] );

			var bluriness = 8;

			hblur.uniforms[ 'h' ].value = bluriness / SCREEN_WIDTH;
			vblur.uniforms[ 'v' ].value = bluriness / SCREEN_HEIGHT;

			hblur.uniforms[ 'r' ].value = vblur.uniforms[ 'r' ].value = 0.5;

			effectFXAA.uniforms[ 'resolution' ].value.set( 1 / SCREEN_WIDTH, 1 / SCREEN_HEIGHT );

			composer = new THREE.EffectComposer( renderer, renderTarget );

			var renderModel = new THREE.RenderPass( scene, camera );

			vblur.renderToScreen = true;
			//effectFXAA.renderToScreen = true;

			composer = new THREE.EffectComposer( renderer, renderTarget );

			composer.addPass( renderModel );

			composer.addPass( effectFXAA );

			composer.addPass( hblur );
			composer.addPass( vblur );

			// GUI

			setupGui();

			// EVENTS

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

		}

		//

		function onWindowResize( event ) {

			SCREEN_WIDTH = window.innerWidth;
			SCREEN_HEIGHT = window.innerHeight - 2 * MARGIN;

			renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );

			camera.aspect = SCREEN_WIDTH / SCREEN_HEIGHT;
			camera.updateProjectionMatrix();

			renderTarget = new THREE.WebGLRenderTarget( SCREEN_WIDTH, SCREEN_HEIGHT, renderTargetParameters );

			composer.reset( renderTarget );

			hblur.uniforms[ 'h' ].value = 4 / SCREEN_WIDTH;
			vblur.uniforms[ 'v' ].value = 4 / SCREEN_HEIGHT;

			effectFXAA.uniforms[ 'resolution' ].value.set( 1 / SCREEN_WIDTH, 1 / SCREEN_HEIGHT );

		}

		function generateMaterials() {

			// environment map

			var path = "textures/cube/SwedishRoyalCastle/";
			var format = '.jpg';
			var urls = [
				path + 'px' + format, path + 'nx' + format,
				path + 'py' + format, path + 'ny' + format,
				path + 'pz' + format, path + 'nz' + format
			];

			var reflectionCube = THREE.ImageUtils.loadTextureCube( urls );
			reflectionCube.format = THREE.RGBFormat;

			var refractionCube = new THREE.Texture( reflectionCube.image, new THREE.CubeRefractionMapping() );
			reflectionCube.format = THREE.RGBFormat;

			// toons

			var toonMaterial1 = createShaderMaterial( "toon1", light, ambientLight ),
			toonMaterial2 = createShaderMaterial( "toon2", light, ambientLight ),
			hatchingMaterial = createShaderMaterial( "hatching", light, ambientLight ),
			hatchingMaterial2 = createShaderMaterial( "hatching", light, ambientLight ),
			dottedMaterial = createShaderMaterial( "dotted", light, ambientLight ),
			dottedMaterial2 = createShaderMaterial( "dotted", light, ambientLight );

			hatchingMaterial2.uniforms.uBaseColor.value.setRGB( 0, 0, 0 );
			hatchingMaterial2.uniforms.uLineColor1.value.setHSV( 0, 0.9, 0.9 );
			hatchingMaterial2.uniforms.uLineColor2.value.setHSV( 0, 0.9, 0.9 );
			hatchingMaterial2.uniforms.uLineColor3.value.setHSV( 0, 0.9, 0.9 );
			hatchingMaterial2.uniforms.uLineColor4.value.setHSV( 0.1, 0.9, 0.9 );

			dottedMaterial2.uniforms.uBaseColor.value.setRGB( 0, 0, 0 );
			dottedMaterial2.uniforms.uLineColor1.value.setHSV( 0.05, 1.0, 1.0 );

			var materials = {

			"chrome" :
			{
				m: new THREE.MeshLambertMaterial( { color: 0xffffff, envMap: reflectionCube } ),
				h: 0, s: 0, v: 1
			},

			"liquid" :
			{
				m: new THREE.MeshLambertMaterial( { color: 0xffffff, envMap: refractionCube, refractionRatio: 0.85 } ),
				h: 0, s: 0, v: 1
			},

			"shiny"  :
			{
				m: new THREE.MeshPhongMaterial( { color: 0x550000, specular: 0x440000, envMap: reflectionCube, combine: THREE.MixOperation, reflectivity: 0.3, perPixel: true, metal: true } ),
				h: 0, s: 0.9, v: 0.3
			},

			"matte" :
			{
				m: new THREE.MeshPhongMaterial( { color: 0x000000, specular: 0x111111, shininess: 1, perPixel: true } ),
				h: 0, s: 0, v: 1
			},

			"plastic" :
			{
				m: new THREE.MeshPhongMaterial( { color: 0x000000, specular: 0x888888, ambient: 0x000000, shininess: 250, perPixel: true } ),
				h: 0.6, s: 0.9, v: 0.2
			},

			"toon1"  :
			{
				m: toonMaterial1,
				h: 0.2, s: 0.5, v: 1
			},

			"toon2" :
			{
				m: toonMaterial2,
				h: 0.4, s: 0.5, v: 1
			},

			"hatching" :
			{
				m: hatchingMaterial,
				h: 0.2, s: 0.2, v: 1
			},

			"hatching2" :
			{
				m: hatchingMaterial2,
				h: 0.0, s: 0.9, v: 0.9
			},

			"dotted" :
			{
				m: dottedMaterial,
				h: 0.2, s: 0.2, v: 1
			},

			"dotted2" :
			{
				m: dottedMaterial2,
				h: 0.1, s: 1.0, v: 1
			}

			};

			return materials;

		}

		function createShaderMaterial( id, light, ambientLight ) {

			var shader = THREE.ShaderToon[ id ];

			var u = THREE.UniformsUtils.clone( shader.uniforms );

			var vs = shader.vertexShader;
			var fs = shader.fragmentShader;

			var material = new THREE.ShaderMaterial( { uniforms: u, vertexShader: vs, fragmentShader: fs } );

			material.uniforms.uDirLightPos.value = light.position;
			material.uniforms.uDirLightColor.value = light.color;

			material.uniforms.uAmbientLightColor.value = ambientLight.color;

			return material;

		}

		//

		function setupGui() {

			var createHandler = function( id ) {

				return function() {

					var mat_old = materials[ current_material ];
					mat_old.h = m_h.getValue();
					mat_old.s = m_s.getValue();
					mat_old.v = m_v.getValue();

					current_material = id;

					var mat = materials[ id ];
					effect.material = mat.m;

					m_h.setValue( mat.h );
					m_s.setValue( mat.s );
					m_v.setValue( mat.v );

					mm.setValue( current_material );

				};

			};

			function toggle( e ) {

				if ( e.style.display === "block" )
					e.style.display = "none";
				else
					e.style.display = "block";

			}

			effectController = {

			material:   "shiny",

			speed :   1.0,
			numBlobs:   10,
			resolution: 28,
			isolation:  80,

			floor: true,
			wallx: false,
			wallz: false,

			hue:    0.0,
			saturation: 0.9,
			value:    0.3,

			lhue:     0.04,
			lsaturation: 1.0,
			lvalue:     1.0,

			lx: 0.5,
			ly: 0.5,
			lz: 1.0,

			postprocessing: false,

			h_m:  function() {
			  for (var i = 0; i < g_m.length; i++)  toggle(g_m[ i ].domElement);
			},
			h_c:  function() {
			  for (var i = 0; i < g_c.length; i++)  toggle(g_c[ i ].domElement);
			},
			h_pc: function() {
			  for (var i = 0; i < g_pc.length; i++) toggle(g_pc[ i ].domElement);
			},
			h_do: function() {
			  for (var i = 0; i < g_do.length; i++) toggle(g_do[ i ].domElement);
			},
			h_s:  function() {
			  for (var i = 0; i < g_s.length; i++)  toggle(g_s[ i ].domElement);
			},
			h_r:  function() {
			  for (var i = 0; i < g_r.length; i++)  toggle(g_r[ i ].domElement);
			},

			dummy: function() {
			}

			};

			var e1, e2, e3, e4, e5, e6, h, m_h, m_s, m_v,
			g_m = [], g_c, g_pc, g_do, g_s, g_r, mm,
			gui = new DAT.GUI();

			// material (type)

			mm = gui.add( effectController, "material" );
			mm.domElement.style.display = "none";

			h = gui.add( effectController, "h_m" ).name( "Materials" );
			setGuiHeaderStyle(h, 0, 65, 50);

			for ( var m in materials ) {

				effectController[ m ] = createHandler( m );

				e1 = gui.add( effectController, m ).name( m );
				setGuiElementStyle( [ e1 ], 0, 65, 50, "block" );
				g_m.push( e1 );

			}

			// material (color)

			h = gui.add( effectController, "h_c" ).name( "Material color" );

			m_h = gui.add( effectController, "hue", 0.0, 1.0, 0.025 );
			m_s = gui.add( effectController, "saturation", 0.0, 1.0, 0.025 );
			m_v = gui.add( effectController, "value", 0.0, 1.0, 0.025 );

			g_c = [ m_h, m_s, m_v ];

			setGuiHeaderStyle( h, 20, 65, 50 );
			setGuiElementStyle( g_c, 20, 65, 50, "block" );

			// light (point)

			h = gui.add(effectController, "h_pc").name("Point light color");

			e1 = gui.add(effectController, "lhue", 0.0, 1.0, 0.025).name("hue");
			e2 = gui.add(effectController, "lsaturation", 0.0, 1.0, 0.025).name("saturation");
			e3 = gui.add(effectController, "lvalue", 0.0, 1.0, 0.025).name("value");

			g_pc = [ e1, e2, e3 ];

			setGuiHeaderStyle(h, 50, 65, 50);
			setGuiElementStyle(g_pc, 50, 65, 50);

			// light (directional)

			h = gui.add(effectController, "h_do").name("Directional light orientation");

			e1 = gui.add(effectController, "lx", -1.0, 1.0, 0.025).name("x");
			e2 = gui.add(effectController, "ly", -1.0, 1.0, 0.025).name("y");
			e3 = gui.add(effectController, "lz", -1.0, 1.0, 0.025).name("z");

			g_do = [ e1, e2, e3 ];

			setGuiHeaderStyle(h, 80, 65, 50);
			setGuiElementStyle(g_do, 80, 65, 50);

			// simulation

			h = gui.add(effectController, "h_s").name("Simulation");

			e1 = gui.add(effectController, "speed", 0.1, 8.0, 0.05);
			e2 = gui.add(effectController, "numBlobs", 1, 50, 1);
			e3 = gui.add(effectController, "resolution", 14, 40, 1);
			e4 = gui.add(effectController, "isolation", 10, 300, 1);

			e5 = gui.add(effectController, "floor");
			e6 = gui.add(effectController, "wallx");
			e7 = gui.add(effectController, "wallz");

			e5.updateDisplay();
			e6.updateDisplay();
			e7.updateDisplay();

			g_s = [ e1, e2, e3, e4, e5, e6, e7 ];

			setGuiHeaderStyle(h, 200, 65, 50);
			setGuiElementStyle(g_s, 200, 65, 50, "block");

			// rendering

			h = gui.add(effectController, "h_r").name("Rendering");
			e1 = gui.add(effectController, "postprocessing");

			g_r = [ e1 ];

			setGuiHeaderStyle(h, 225, 65, 50);
			setGuiElementStyle(g_r, 225, 65, 50, "block");

			// save

			//e1 = gui.add(GUI, "saveURL").name("Save to URL");
			//setGuiHeaderStyle(e1, 250, 65, 50, "block");

			gui.domElement.style.backgroundColor = "#222";

			// restore material from URL

			id = mm.getValue()
			current_material = id;
			var mat = materials[ id ];
			effect.material = mat.m;

		}


		function setGuiHeaderStyle( g, h, s, v ) {

			var color = "hsl(" + h + "," + s + "%, " + v + "%)";

			g.domElement.style.borderLeft = "solid 5px " + color;
			g.domElement.style.background = color;
			g.domElement.style.fontWeight = "bold";

		}

		function setGuiElementStyle( a, h, s, v, display ) {

			var s, color = "hsl(" + h + "," + s + "%, " + v + "%)";

			for ( i = 0; i < a.length; i ++ ) {

				s = a[ i ].domElement.style;
				s.borderLeft = "solid 5px " + color;
				s.display = display ? display : "none";

			}

		}

		// this controls content of marching cubes voxel field

		function updateCubes( object, time, numblobs, floor, wallx, wallz ) {

			object.reset();

			// fill the field with some metaballs

			var i, ballx, bally, ballz, subtract, strength;

			subtract = 12;
			strength = 1.2 / ( ( Math.sqrt( numblobs ) - 1 ) / 4 + 1 );

			for ( i = 0; i < numblobs; i ++ ) {

				ballx = Math.sin( i + 1.26 * time * ( 1.03 + 0.5 * Math.cos( 0.21 * i ) ) ) * 0.27 + 0.5;
				bally = Math.abs( Math.cos( i + 1.12 * time * Math.cos( 1.22 + 0.1424 * i ) ) ) * 0.77; // dip into the floor
				ballz = Math.cos( i + 1.32 * time * 0.1 * Math.sin( ( 0.92 + 0.53 * i ) ) ) * 0.27 + 0.5;

				object.addBall(ballx, bally, ballz, strength, subtract);

			}

			if ( floor ) object.addPlaneY( 2, 12 );
			if ( wallz ) object.addPlaneZ( 2, 12 );
			if ( wallx ) object.addPlaneX( 2, 12 );

		}

		//


		function animate() {

			requestAnimationFrame( animate );

			render();
			stats.update();

		}

		function render() {

			var delta = clock.getDelta();

			time += delta * effectController.speed * 0.5;

			controls.update( delta );

			// marching cubes

			if ( effectController.resolution !== resolution ) {

				resolution = effectController.resolution;
				effect.init( resolution );

			}

			if ( effectController.isolation !== effect.isolation ) {

				effect.isolation = effectController.isolation;

			}

			updateCubes( effect, time, effectController.numBlobs, effectController.floor, effectController.wallx, effectController.wallz );

			// materials

			if ( effect.material instanceof THREE.ShaderMaterial ) {

				if ( current_material === "dotted2" ) {

					effect.material.uniforms.uLineColor1.value.setHSV( effectController.hue, effectController.saturation, effectController.value );

				} else if ( current_material === "hatching2" ) {

					u = effect.material.uniforms;

					u.uLineColor1.value.setHSV( effectController.hue, effectController.saturation, effectController.value );
					u.uLineColor2.value.setHSV( effectController.hue, effectController.saturation, effectController.value );
					u.uLineColor3.value.setHSV( effectController.hue, effectController.saturation, effectController.value );
					u.uLineColor4.value.setHSV( ( effectController.hue + 0.2 % 1.0 ), effectController.saturation, effectController.value );

				} else {

					effect.material.uniforms.uBaseColor.value.setHSV( effectController.hue, effectController.saturation, effectController.value );

				}

			} else {

				effect.material.color.setHSV( effectController.hue, effectController.saturation, effectController.value );

			}

			// lights

			light.position.set( effectController.lx, effectController.ly, effectController.lz );
			light.position.normalize();

			pointLight.color.setHSV( effectController.lhue, effectController.lsaturation, effectController.lvalue );

			// render

			if ( effectController.postprocessing ) {

				composer.render( delta );

			} else {

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

			}

		}

</script>

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</html>