javascript
/
three.js
peilaus alkaen https://github.com/tazdij/three.js.git


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647
							<!DOCTYPE HTML>
<html lang="en">
	<head>
		<title>three.js webgl - particles - shapes</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/>
		<style type="text/css">
			body {
				font-family: Monospace;
				background-color: #000;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>


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

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

		<script type="text/javascript" src="js/ShaderExtras.js"></script>
		<script type="text/javascript" src="js/postprocessing/EffectComposer.js"></script>
		<script type="text/javascript" src="js/postprocessing/RenderPass.js"></script>
		<script type="text/javascript" src="js/postprocessing/ShaderPass.js"></script>
		<script type="text/javascript" src="js/postprocessing/MaskPass.js"></script>
		<script type="text/javascript" src="js/postprocessing/BloomPass.js"></script>
		<script type="text/javascript" src="js/postprocessing/FilmPass.js"></script>

		<!-- load the font file from canvas-text -->


		<script type="text/javascript" src="fonts/helvetiker_regular.typeface.js"></script>

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

				attribute float size;
				attribute vec3 pcolor;

				varying vec3 vColor;

				void main() {

					vColor = pcolor;

					vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );

					gl_PointSize = size * ( 200.0 / length( mvPosition.xyz ) );

					gl_Position = projectionMatrix * mvPosition;

				}

			</script>

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

				uniform sampler2D texture;

				varying vec3 vColor;

				void main() {

					vec4 outColor = texture2D( texture, gl_PointCoord );

					gl_FragColor = outColor * vec4( vColor, 1.0 );

				}

			</script>

		<script type="text/javascript">

			var container, stats;

			var camera, scene, renderer;

			var text, plane;

			var oldTime = new Date().getTime() * 0.001;
			var delta = 1;
			var speed = 50;

			var pointLight;

			var targetRotation = 0;
			var targetRotationOnMouseDown = 0;

			var mouseX = 0;
			var mouseXOnMouseDown = 0;

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


			var heartShape, particleCloud, sparksEmitter, emitterPos;
			var _rotation = 0;
			var timeOnShapePath = 0;

			init();
			animate();

			function init() {

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

				var info = document.createElement( 'div' );
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = 'Three.js with WebGL Love. Simple Particle Systems with Shapes by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br/>Move your mouse. Click to pause/resume.';
				container.appendChild( info );

				// CAMERA

				camera = new THREE.Camera( 70, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.y = 150;
				camera.position.z = 400;
				camera.target.position.y = 150;

				// SCENE

				scene = new THREE.Scene();

				var directionalLight = new THREE.DirectionalLight( 0xffffff, 0.5 );
				directionalLight.position.set( 0, -1, 1 );
				directionalLight.position.normalize();
				scene.add( directionalLight );

				pointLight = new THREE.PointLight( 0xffffff, 2, 300 );
				pointLight.position.set( 0, 0, 0 );
				scene.add( pointLight );

				// TEXT

				var theText = "THREE.JS";

				// Get text from hash

				var hash = document.location.hash.substr( 1 );

				if ( hash.length !== 0 ) {

					theText = hash;

				}

                var textMaterialFront = new THREE.MeshLambertMaterial( { color: 0xffffff, shading: THREE.FlatShading, opacity: 0.95 } );
                var textMaterialSide = new THREE.MeshLambertMaterial( { color: 0xffffff } );

				var text3d = new THREE.TextGeometry( theText, {

					size: 70,
					height: 25,
					curveSegments: 4,
					font: "helvetiker",

					bevelEnabled: true,
					bevelThickness: 2,
					bevelSize: 2,

					material: textMaterialFront,
					extrudeMaterial: textMaterialSide

				});

				text3d.computeVertexNormals();
				text3d.computeBoundingBox();

				var centerOffset = -0.5 * ( text3d.boundingBox.x[ 1 ] - text3d.boundingBox.x[ 0 ] );

				text = new THREE.Mesh( text3d, new THREE.MeshFaceMaterial() );

				// Potentially, we can extract the vertices or faces of the text to generate particles too.
				// Geo > Vertices > Position

                text.position.x = centerOffset;
                text.position.y = 130;
                text.position.z = -50;

                text.rotation.x = 0;
                text.rotation.y = Math.PI * 2;

				parent = new THREE.Object3D();
                parent.addChild( text );
				scene.addObject( parent );

				///// Create particle objects for Three.js

				var particlesLength = 70000;

				var particles = new THREE.Geometry();

				function newpos( x, y, z ) {

					return new THREE.Vertex( new THREE.Vector3( x, y, z ) );

				}


				var Pool = {

					__pools: [],

					// Get a new Vector

					get: function() {

						if ( this.__pools.length > 0 ) {

							return this.__pools.pop();

						}

						console.log( "pool ran out!" )
						return null;

					},

					// Release a vector back into the pool

					add: function( v ) {

						this.__pools.push( v );

					}

				};


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

					particles.vertices.push( newpos( Math.random() * 200 - 100, Math.random() * 100 + 150, Math.random() * 50 ) );
					Pool.add( i );

				}


				// Create pools of vectors

				attributes = {

					size:  { type: 'f', value: [] },
					pcolor: { type: 'c', value: [] }

				};

				var sprite = generateSprite() ;

				texture = new THREE.Texture( sprite );
				texture.needsUpdate = true;

				uniforms = {

					texture:   { type: "t", value: 0, texture: texture }

				};

				// PARAMETERS

				// Steadycounter
				// Life
				// Opacity
				// Hue Speed
				// Movement Speed

				function generateSprite() {

					var canvas = document.createElement( 'canvas' );
					canvas.width = 128;
					canvas.height = 128;

					var context = canvas.getContext( '2d' );


					// Just a square, doesnt work too bad with blur pp.
					// context.fillStyle = "white";
					// context.strokeStyle = "white";
					// context.fillRect(0, 0, 63, 63) ;

					// Heart Shapes are not too pretty here
					// var x = 4, y = 0;
					// context.save();
					// context.scale(8, 8); // Scale so canvas render can redraw within bounds
					// context.beginPath();
					// context.bezierCurveTo( x + 2.5, y + 2.5, x + 2.0, y, x, y );
					// context.bezierCurveTo( x - 3.0, y, x - 3.0, y + 3.5,x - 3.0,y + 3.5 );
					// context.bezierCurveTo( x - 3.0, y + 5.5, x - 1.0, y + 7.7, x + 2.5, y + 9.5 );
					// context.bezierCurveTo( x + 6.0, y + 7.7, x + 8.0, y + 5.5, x + 8.0, y + 3.5 );
					// context.bezierCurveTo( x + 8.0, y + 3.5, x + 8.0, y, x + 5.0, y );
					// context.bezierCurveTo( x + 3.5, y, x + 2.5, y + 2.5, x + 2.5, y + 2.5 );
					// context.closePath();

					context.beginPath();
					context.arc( 64, 64, 60, 0, Math.PI * 2, false) ;
					context.closePath();

					context.lineWidth = 0.5; //0.05
					context.stroke();
					context.restore();

					var gradient = context.createRadialGradient( canvas.width / 2, canvas.height / 2, 0, canvas.width / 2, canvas.height / 2, canvas.width / 2 );

					gradient.addColorStop( 0, 'rgba(255,255,255,1)' );
					gradient.addColorStop( 0.2, 'rgba(255,255,255,1)' );
					gradient.addColorStop( 0.4, 'rgba(200,200,200,1)' );
					gradient.addColorStop( 1, 'rgba(0,0,0,1)' );

					context.fillStyle = gradient;

					context.fill();

					//var idata =context.getImageData(0, 0, canvas.width, canvas.height);
					//document.body.appendChild(canvas);
					return canvas;

				}


				var shaderMaterial = new THREE.MeshShaderMaterial( {

					uniforms: 		uniforms,
					attributes:     attributes,

					vertexShader:   document.getElementById( 'vertexshader' ).textContent,
					fragmentShader: document.getElementById( 'fragmentshader' ).textContent,

					blending: 		THREE.AdditiveBlending,
					depthWrite:		false,
					transparent:	true

				});

				particleCloud = new THREE.ParticleSystem( particles, shaderMaterial );

				particleCloud.dynamic = true;
				//particleCloud.sortParticles = true;

				var vertices = particleCloud.geometry.vertices;
				var values_size = attributes.size.value;
				var values_color = attributes.pcolor.value;

				for( var v = 0; v < vertices.length; v ++ ) {

					values_size[ v ] = 50;

					values_color[ v ] = new THREE.Color( 0xffffff );
					values_color[ v ].setHSV( 0, 0, 0 );

					particles.vertices[ v ].position.set( Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY );

				}

				parent.addChild( particleCloud );
				particleCloud.y = 800;


				// Create Particle Systems

				// EMITTER STUFF

				// Heart

				var x = 0, y = 0;

				heartShape = new THREE.Shape();

				heartShape.moveTo( x + 25, y + 25 );
				heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
				heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35,x - 30,y + 35 );
				heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
				heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
				heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
				heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );


				var hue = 0;

				var setTargetParticle = function() {

					var target = Pool.get();
					values_size[ target ] = Math.random() * 200 + 100;

					return target;

				};

				var onParticleCreated = function( p ) {

					var position = p.position;
					p.target.position = position;

					var target = p.target;

					if ( target ) {

						//console.log(target,particles.vertices[target]);
						//values_size[target]
						//values_color[target]

						hue += 0.0003 * delta;
						if ( hue > 1 ) hue -= 1;

						// TODO Create a PointOnShape Action/Zone in the particle engine

						timeOnShapePath += 0.00035 * delta;
						if ( timeOnShapePath > 1 ) timeOnShapePath -= 1;

						var pointOnShape = heartShape.getPointAt( timeOnShapePath );

						emitterpos.x = pointOnShape.x * 5 - 100;
						emitterpos.y = -pointOnShape.y * 5 + 400;

						//pointLight.position.copy( emitterpos );
						pointLight.position.x = emitterpos.x;
						pointLight.position.y = emitterpos.y;
						pointLight.position.z = 100;

						particles.vertices[ target ].position = p.position;

						values_color[ target ].setHSV( hue, 0.8, 0.15 );

						pointLight.color.setHSV( hue, 0.8, 0.95 );


					};

				};

				var onParticleDead = function( particle ) {

					var target = particle.target;

					if ( target ) {

						// Hide the particle

						values_color[ target ].setHSV( 0, 0, 0 );
						particles.vertices[ target ].position.set( Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY );

						// Mark particle system as available by returning to pool

						Pool.add( particle.target );

					}

				};

				var engineLoopUpdate = function() {

				};


				sparksEmitter = new SPARKS.Emitter( new SPARKS.SteadyCounter( 500 ) );

				emitterpos = new THREE.Vector3( 0, 0, 0 );

				sparksEmitter.addInitializer( new SPARKS.Position( new SPARKS.PointZone( emitterpos ) ) );
				sparksEmitter.addInitializer( new SPARKS.Lifetime( 1, 40 ));
				sparksEmitter.addInitializer( new SPARKS.Target( null, setTargetParticle ) );


				sparksEmitter.addInitializer( new SPARKS.Velocity( new SPARKS.PointZone( new THREE.Vector3( 0, -5, 1 ) ) ) );
				// TOTRY Set velocity to move away from centroid

				sparksEmitter.addAction( new SPARKS.Age() );
				sparksEmitter.addAction( new SPARKS.Accelerate( 0, 0, -50 ) );
				sparksEmitter.addAction( new SPARKS.Move() );
				sparksEmitter.addAction( new SPARKS.RandomDrift( 90, 100, 2000 ) );


				sparksEmitter.addCallback( "created", onParticleCreated );
				sparksEmitter.addCallback( "dead", onParticleDead );
				sparksEmitter.start();

				//sparksEmitter.addCallback("loopUpdated", engineLoopUpdate);

				//sparksEmitter.addCallback("updated", function(p) {
					// var target = particle.target;
					// 					if (target) {
					// 						// update energy properties
					// 						//values_size[target] = Math.random()*100;
					// 					}
				//});
				//
				// End Particles


				renderer = new THREE.WebGLRenderer();
                renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setClearColorHex( 0x000000, 1 );

				container.appendChild( renderer.domElement );

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

				// POST PROCESSING

				var effectFocus = new THREE.ShaderPass( THREE.ShaderExtras[ "focus" ] );

				var effectScreen = new THREE.ShaderPass( THREE.ShaderExtras[ "screen" ] );
				effectFilm = new THREE.FilmPass( 0.5, 0.25, 2048, false );

				var shaderBlur = THREE.ShaderExtras[ "triangleBlur" ];
				var effectBlurX = new THREE.ShaderPass( shaderBlur, 'texture' );
				var effectBlurY = new THREE.ShaderPass( shaderBlur, 'texture' );

				var radius = 15;
				var blurAmountX = radius / window.innerWidth;
				var blurAmountY = radius / window.innerHeight;

				effectBlurX.uniforms['delta'].value = new THREE.Vector2( blurAmountX, 0 );
				effectBlurY.uniforms['delta'].value = new THREE.Vector2( 0, blurAmountY );

				effectFocus.uniforms[ 'sampleDistance' ].value = 0.99; //0.94
				effectFocus.uniforms[ 'waveFactor' ].value = 0.003;  //0.00125

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

				composer = new THREE.EffectComposer( renderer );
				composer.addPass( renderScene );
				//composer.addPass( effectBlurX );
				//composer.addPass( effectBlurY );
				//composer.addPass( effectScreen );
				composer.addPass( effectFocus );
				//composer.addPass( effectFilm );

				//effectBlurY.renderToScreen = true;

				effectFocus.renderToScreen = true;
				effectScreen.renderToScreen = true;
				effectFilm.renderToScreen = true;

				document.addEventListener( 'mousedown', onDocumentMouseDown, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );

			}

			//

			document.addEventListener( 'mousemove', onDocumentMouseMove, false );


			function onDocumentMouseDown( event ) {

				event.preventDefault();

				mouseXOnMouseDown = event.clientX - windowHalfX;
				targetRotationOnMouseDown = targetRotation;

				if ( sparksEmitter.isRunning() ) {

					sparksEmitter.stop();

				} else {

					sparksEmitter.start();

				}

			}

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;

				targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;

			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
					targetRotationOnMouseDown = targetRotation;

				}

			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;

				}

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}


			function render() {

				var time = new Date().getTime() * 0.001;
				delta = speed * ( time - oldTime );
				oldTime = time;

				particleCloud.geometry.__dirtyVertices = true;

				attributes.size.needsUpdate = true;
				attributes.pcolor.needsUpdate = true;

				// Pretty cool effect if you enable this
				//particleCloud.rotation.y += 0.05;

				parent.rotation.y += ( targetRotation - parent.rotation.y ) * 0.05;

				renderer.clear();

				//renderer.render( scene, camera );
				composer.render( 0.1 );


			}

		</script>

	</body>
</html>