mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-26 23:44:56 +01:00
346 lines
8.6 KiB
HTML
346 lines
8.6 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js canvas - particles with shapes</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<style>
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body {
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font-family: Monospace;
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background-color: #f0f0f0;
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margin: 0px;
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overflow: hidden;
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}
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</style>
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</head>
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<body>
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<script src="../build/three.min.js"></script>
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<script src="js/renderers/Projector.js"></script>
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<script src="js/renderers/CanvasRenderer.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script src="js/libs/tween.min.js"></script>
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<script src="js/Sparks.js"></script>
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<!-- load the font file from canvas-text -->
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<script src="fonts/helvetiker_regular.typeface.js"></script>
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<script>
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var container, stats;
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var camera, scene, renderer;
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var group, text, plane;
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var targetRotation = 0;
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var targetRotationOnMouseDown = 0;
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var mouseX = 0;
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var mouseXOnMouseDown = 0;
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var windowHalfX = window.innerWidth / 2;
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var windowHalfY = window.innerHeight / 2;
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var heartShape, particleCloud, sparksEmitter, emitterPos;
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var _rotation = 0;
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var timeOnShapePath = 0;
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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var info = document.createElement( 'div' );
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info.style.position = 'absolute';
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info.style.top = '10px';
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info.style.width = '100%';
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info.style.textAlign = 'center';
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info.innerHTML = 'Three.js with Love. Simple Particle Systems with Shapes by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br>Move your mouse.';
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container.appendChild( info );
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 150, 700 );
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scene = new THREE.Scene();
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group = new THREE.Group();
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scene.add( group );
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// Get text from hash
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var string = "THREE.JS";
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var hash = document.location.hash.substr( 1 );
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if ( hash.length !== 0 ) {
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string = hash;
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}
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var text3d = new THREE.TextGeometry( string, {
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size: 80,
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height: 20,
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curveSegments: 2,
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font: "helvetiker"
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});
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text3d.computeBoundingBox();
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var centerOffset = -0.5 * ( text3d.boundingBox.max.x - text3d.boundingBox.min.x );
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var textMaterial = new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, overdraw: 0.5 } );
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text = new THREE.Mesh( text3d, textMaterial );
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// Potentially, we can extract the vertices or faces of the text to generate particles too.
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// Geo > Vertices > Position
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text.position.x = centerOffset;
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text.position.y = 100;
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text.position.z = 0;
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text.rotation.x = 0;
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text.rotation.y = Math.PI * 2;
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group.add( text );
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particleCloud = new THREE.Object3D(); // Just a group
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particleCloud.y = 800;
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group.add( particleCloud );
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// Create Particle Systems
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// Heart
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var x = 0, y = 0;
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heartShape = new THREE.Shape();
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heartShape.moveTo( x + 25, y + 25 );
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heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
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heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35,x - 30,y + 35 );
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heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
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heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
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heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
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heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );
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var hue = 0;
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var hearts = function ( context ) {
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context.globalAlpha = 0.5;
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var x = 0, y = 0;
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context.scale(0.05, -0.05); // Scale so canvas render can redraw within bounds
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context.beginPath();
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// From http://blog.burlock.org/html5/130-paths
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context.bezierCurveTo( x + 2.5, y + 2.5, x + 2.0, y, x, y );
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context.bezierCurveTo( x - 3.0, y, x - 3.0, y + 3.5,x - 3.0,y + 3.5 );
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context.bezierCurveTo( x - 3.0, y + 5.5, x - 1.0, y + 7.7, x + 2.5, y + 9.5 );
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context.bezierCurveTo( x + 6.0, y + 7.7, x + 8.0, y + 5.5, x + 8.0, y + 3.5 );
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context.bezierCurveTo( x + 8.0, y + 3.5, x + 8.0, y, x + 5.0, y );
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context.bezierCurveTo( x + 3.5, y, x + 2.5, y + 2.5, x + 2.5, y + 2.5 );
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context.fill();
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context.lineWidth = 0.5; //0.05
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context.stroke();
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}
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var setTargetParticle = function() {
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var material = new THREE.SpriteCanvasMaterial( {
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program: hearts
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} );
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material.color.setHSL(hue, 1, 0.75);
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hue += 0.001;
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if (hue>1) hue-=1;
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particle = new THREE.Sprite( material );
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particle.scale.x = particle.scale.y = Math.random() * 40 + 40;
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particleCloud.add( particle );
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return particle;
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};
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var onParticleCreated = function( p ) {
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p.target.position.copy( p.position );
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};
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var onParticleDead = function( particle ) {
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particle.target.visible = false;
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particleCloud.remove( particle.target );
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};
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sparksEmitter = new SPARKS.Emitter(new SPARKS.SteadyCounter(160));
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emitterpos = new THREE.Vector3();
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sparksEmitter.addInitializer(new SPARKS.Position( new SPARKS.PointZone( emitterpos ) ) );
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sparksEmitter.addInitializer(new SPARKS.Lifetime(0,2));
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sparksEmitter.addInitializer(new SPARKS.Target(null, setTargetParticle));
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sparksEmitter.addInitializer(new SPARKS.Velocity(new SPARKS.PointZone(new THREE.Vector3(0,-50,10))));
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// TOTRY Set velocity to move away from centroid
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sparksEmitter.addAction(new SPARKS.Age());
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//sparksEmitter.addAction(new SPARKS.Accelerate(0.2));
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sparksEmitter.addAction(new SPARKS.Move());
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sparksEmitter.addAction(new SPARKS.RandomDrift(50,50,2000));
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sparksEmitter.addCallback("created", onParticleCreated);
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sparksEmitter.addCallback("dead", onParticleDead);
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sparksEmitter.addCallback("updated", function( particle ) {
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particle.target.position.copy( particle.position );
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});
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sparksEmitter.start();
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// End Particles
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renderer = new THREE.CanvasRenderer();
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renderer.setClearColor( 0xf0f0f0 );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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stats = new Stats();
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stats.domElement.style.position = 'absolute';
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stats.domElement.style.top = '0px';
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container.appendChild( stats.domElement );
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document.addEventListener( 'mousedown', onDocumentMouseDown, false );
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document.addEventListener( 'touchstart', onDocumentTouchStart, false );
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document.addEventListener( 'touchmove', onDocumentTouchMove, false );
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//
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window.addEventListener( 'resize', onWindowResize, false );
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}
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function onWindowResize() {
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windowHalfX = window.innerWidth / 2;
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windowHalfY = window.innerHeight / 2;
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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//
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document.addEventListener( 'mousemove', onDocumentMouseMove, false );
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function onDocumentMouseDown( event ) {
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event.preventDefault();
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mouseXOnMouseDown = event.clientX - windowHalfX;
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targetRotationOnMouseDown = targetRotation;
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if ( sparksEmitter.isRunning() ) {
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sparksEmitter.stop();
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} else {
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sparksEmitter.start();
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}
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}
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function onDocumentMouseMove( event ) {
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mouseX = event.clientX - windowHalfX;
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targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
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}
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function onDocumentTouchStart( event ) {
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if ( event.touches.length == 1 ) {
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event.preventDefault();
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mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
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targetRotationOnMouseDown = targetRotation;
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}
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}
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function onDocumentTouchMove( event ) {
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if ( event.touches.length == 1 ) {
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event.preventDefault();
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mouseX = event.touches[ 0 ].pageX - windowHalfX;
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targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;
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}
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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timeOnShapePath += 0.0337;
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if (timeOnShapePath > 1) timeOnShapePath -= 1;
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// TODO Create a PointOnShape Action/Zone in the particle engine
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var pointOnShape = heartShape.getPointAt( timeOnShapePath );
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emitterpos.x = pointOnShape.x * 5 - 100;
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emitterpos.y = -pointOnShape.y * 5 + 400;
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// Pretty cool effect if you enable this
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// particleCloud.rotation.y += 0.05;
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group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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