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sample code for particle.

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0 parents commit 09c2316c45e3b6f91ffcd5dd9629e66364e0e9d8 KATAOKA,Atsushi committed Apr 24, 2011
5 .gitignore
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+api.jsca
+.project
+.settings
+build
+tmp
1 CHANGELOG.txt
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+Place your change log text here. This file will be incorporated with your app at package time.
219 LICENSE
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1 LICENSE.txt
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+Place your license text here. This file will be incorporated with your app at package time.
7 README
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+This is a sample code of javascript particle engine.
+
+This engine written by Jason Harwig.
+I modified some for Titanium Mobile.
+
+original code is here:
+ http://www.nearinfinity.com/blogs/jason_harwig/javascript_particle_engine_in_canvas.html
BIN Resources/KS_nav_ui.png
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39 Resources/app.js
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+// this sets the background color of the master UIView (when there are no windows/tab groups on it)
+Titanium.UI.setBackgroundColor('#000');
+
+var win = Titanium.UI.createWindow();
+win.backgroundColor = '#B5D5FF';
+
+var web = Titanium.UI.createWebView({
+ width:'150',
+ height:'150',
+ bottom:40,
+ url:'../html/particle.html',
+ backgroundColor:'transparent'});
+
+web.addEventListener('error', function(e){
+ // エラー発生時に実行される
+ Ti.API.error(e.message);
+});
+win.add(web);
+
+var button = Ti.UI.createButton({ bottom:6,
+ width:96,
+ height:36,
+ title:'touch me'
+});
+button.addEventListener('click', function(e){
+ web.evalJS('startEmit({y_force:-1.9, max_particles:150, respawn:10, vel:[-2, 2], life:[0.02, .06]});');
+});
+
+win.add(button);
+
+Titanium.App.addEventListener('started', function() {
+ Ti.App.debug("particle started.");
+});
+
+Titanium.App.addEventListener('finshed', function() {
+ Ti.App.debug("particle finished.");
+});
+
+win.open();
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BIN Resources/iphone/Default@2x.png
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BIN Resources/iphone/appicon.png
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223 html/js/particle_canvas.js
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+/**
+ * Javascript Particle Emitter
+ * Written By Jason Harwig
+ * http://nearinfinity.com/blogs/page/jharwig
+ *
+ * This work is licensed under a Creative Commons Attribution 2.5 License
+ * More Info: http://creativecommons.org/licenses/by/2.5/
+ *
+ */
+(function() {
+ var Color = Class.create({
+ initialize: function(hsv) {
+ this.hsv = hsv;
+ },
+ changeHue: function(h) {
+ this.hsv = [h, this.hsv[1], this.hsv[2]];
+ },
+ toRGB: function() {
+ var hsv = this.hsv,
+ h = hsv[0] / 360,
+ s = hsv[1] / 100,
+ v = hsv[2] / 100,
+ rgb = [];
+
+ if (s == 0) {
+ rgb[0] = v * 255;
+ rgb[1] = v * 255;
+ rgb[2] = v * 255;
+ } else {
+ var var_h = h * 6,
+ var_i = Math.floor(var_h),
+ var_1 = v * (1 - s),
+ var_2 = v * (1 - s * (var_h - var_i)),
+ var_3 = v * (1 - s * (1 - (var_h - var_i)));
+
+ if (var_i == 0) {var_r = v; var_g = var_3; var_b = var_1;}
+ else if (var_i == 1) {var_r = var_2; var_g = v; var_b = var_1;}
+ else if (var_i == 2) {var_r = var_1; var_g = v; var_b = var_3;}
+ else if (var_i == 3) {var_r = var_1; var_g = var_2; var_b = v;}
+ else if (var_i == 4) {var_r = var_3; var_g = var_1; var_b = v;}
+ else {var_r = v; var_g = var_1; var_b = var_2;};
+
+ rgb[0] = var_r * 255;
+ rgb[1] = var_g * 255;
+ rgb[2] = var_b * 255;
+ }
+ return [Math.floor(rgb[0]), Math.floor(rgb[1]), Math.floor(rgb[2])];
+ }
+ });
+ var DT = 0.05;
+
+ window.Particle = Class.create({
+ initialize: function(x, y, engine) {
+ this.initPos = [x, y];
+ this.pos = [x, y];
+ this.calc_random = engine.calc_random;
+ this.vel = [this.calc_random(engine.vel_range[0], engine.vel_range[1]),
+ this.calc_random(engine.vel_range[0], engine.vel_range[1])];
+ this.opacity = 0;
+ this.alive = true;
+ this.life_dec = this.calc_random(engine.life_range[0], engine.life_range[1]);
+ this.engine = engine;
+ this.respawn = engine.respawn;
+ this.curr_respawn = engine.respawn;
+ this.previousPositions = [];
+ },
+
+ circle: function(g, x, y, r) {
+ g.beginPath();
+
+ var grad = g.createRadialGradient(x, y, 1, x, y, r);
+ grad.addColorStop(0, 'rgba(' + this.color[0] + ',' + this.color[1] + ',' + this.color[2] + ',' + this.opacity + ')');
+ grad.addColorStop(1, 'rgba(' + this.color[0] + ',' + this.color[1] + ',' + this.color[2] + ',0)');
+ g.fillStyle = grad;
+ g.arc(x, y, r, 0, Math.PI/180*360, false);
+ g.fill();
+
+ this.previousPositions.push({x:x-r, y:y-r, w:r*2, h:r*2});
+ },
+
+ draw: function(g, velocity_callback) {
+
+ if (this.opacity < 0) {
+ this.reset(false);
+ } else {
+ if (this.opacity > 1.0) {
+ this.opacity = 1;
+ this.opacity_delta *= -1/5;
+ }
+
+ this.circle(g, this.pos[0], this.pos[1], this.black ? 5 : 10);
+
+ this.vel = velocity_callback(this.vel);
+ this.pos[0] += this.vel[0] * DT;
+ this.pos[1] += this.vel[1] * DT;
+ this.opacity += this.opacity_delta;
+ }
+ },
+
+ dirtyRect: function() {
+ var pos = this.previousPositions;
+
+ return pos.length > 0 ? pos.shift() : undefined;
+ },
+
+ reset: function(shouldBeAlive) {
+ this.alive = shouldBeAlive;
+ this.opacity = 1.0;
+ this.opacity_delta = this.life_dec*5;
+ this.pos[0] = this.initPos[0];
+ this.pos[1] = this.initPos[1];
+ if (Math.random() > 0.9) {
+ this.black = true;
+ this.color = new Color([0, 0, this.calc_random(0, 50)]).toRGB();
+ this.opacity = 0.5;
+ } else {
+ this.black = false;
+ this.color = new Color([this.calc_random(0, 60), 100, 100]).toRGB();
+ }
+ this.vel = [this.calc_random(this.engine.vel_range[0], this.engine.vel_range[1]),
+ this.calc_random(this.engine.vel_range[0], this.engine.vel_range[1])];
+ this.life_dec = this.calc_random(this.engine.life_range[0], this.engine.life_range[1]);
+ }
+ });
+
+
+ window.Emitter = Class.create({
+ initialize: function(options, style) {
+ this.options = options;
+ this.canvas = $("particle_canvas");
+ this.particles = [];
+ this.max_particles = this.options.max_particles || 10;
+ this.vel_range = [(this.options.vel && this.options.vel[0]) || -1, (this.options.vel && this.options.vel[1]) || 1];
+ this.life_range = [(this.options.life && this.options.life[0]) || .01, (this.options.life && this.options.life[1]) || .02];
+ this.event_type = this.options.event_type || 'click';
+ this.x_force = this.options.x_force || 0;
+ this.y_force = this.options.y_force || 0;
+ this.size = this.options.size;
+ this.respawn = this.options.respawn || 1;
+ this.prepareParticles();
+ },
+
+ calc_random: function(min, max) {
+ var rnd = (max - min) * Math.random() + min;
+ return rnd;
+ },
+
+ prepareParticles: function() {
+ var inst = this,
+ halfInputW = this.canvas.width/2 * 0.6,
+ x1 = +this.canvas.width / 2 - halfInputW,
+ x2 = +this.canvas.width / 2 + halfInputW,
+ y = +this.canvas.height;
+
+ this.max_particles.times(function(value, index) {
+ var x = inst.calc_random(x1, x2);
+ inst.particles.push(new Particle(x, y, inst));
+ });
+ },
+
+ start: function() {
+ this.particles.each(function(particle) {
+ particle.reset(true);
+ });
+
+ var inst = this,
+ FPS = Math.floor(1000/60),
+ startTime = new Date().getTime(),
+ lastTime = startTime,
+ tmr = setInterval(function() {
+ var now = new Date().getTime(),
+ elapsedTime = now - startTime,
+ expired = elapsedTime > 10000,
+ dt = now - lastTime / FPS;
+
+ lastTime = now;
+ if (!inst.update(dt, expired)) {
+ clearInterval(tmr);
+ }
+ }, FPS);
+ Titanium.App.fireEvent("started", {});
+ },
+
+ update: function(dt, expired) {
+ var inst = this, g = this.canvas.getContext('2d');
+
+ //g.clearRect(0,0,150,150);
+ this.particles.each(function(particle) {
+ var rect = particle.dirtyRect();
+
+ if (rect) {
+ g.clearRect(rect.x, rect.y, rect.w, rect.h);
+ }
+ });
+
+ this.particles.each(function(particle) {
+ if (particle.alive) {
+ particle.draw(g, function(vel) {
+ vel[0] += inst.x_force;
+ vel[1] += inst.y_force;
+ return vel;
+ });
+ }
+ });
+ var anyAlive = this.particles.inject(false, function(anyAlive, particle) {
+ if (!particle.alive && --particle.curr_respawn > 0 && !expired) {
+ particle.reset(true);
+ }
+ return anyAlive || particle.alive;
+ });
+
+ if (anyAlive) {
+ return true;
+ } else {
+ this.particles.each(function(p) {
+ p.curr_respawn = p.respawn;
+ });
+ Titanium.App.fireEvent("finished", {});
+ return false;
+ }
+ }
+ });
+})();
6,082 html/js/prototype.js
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15 html/particle.html
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+<html>
+ <head>
+ <title>particle</title>
+ <script type="text/javascript" src="js/prototype.js"></script>
+ <script type="text/javascript" src="js/particle_canvas.js"></script>
+ <script type="text/javascript">
+ function startEmit(params){
+ new Emitter(params).start();
+ }
+ </script>
+ </head>
+ <body>
+ <canvas id="particle_canvas" style="width:100%;height:100%;"></canvas>
+ </body>
+</html>
8 manifest
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+#appname:tiparticle
+#publisher:atsusy
+#url:http://marshmallow.com
+#image:appicon.png
+#appid:com.marshmallow.tiparticle
+#desc:not specified
+#type:mobile
+#guid:e9f4d455-7851-4115-b484-9dc5fd8e401a
39 tiapp.xml
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<ti:app xmlns:ti="http://ti.appcelerator.org">
+ <deployment-targets>
+ <target device="iphone">true</target>
+ <target device="ipad">false</target>
+ <target device="android">false</target>
+ </deployment-targets>
+ <id>com.marshmallow.tiparticle</id>
+ <name>tiparticle</name>
+ <version>1.0</version>
+ <publisher>atsusy</publisher>
+ <url>http://marshmallow.com</url>
+ <description>not specified</description>
+ <copyright>2011 by atsusy</copyright>
+ <icon>appicon.png</icon>
+ <persistent-wifi>false</persistent-wifi>
+ <prerendered-icon>false</prerendered-icon>
+ <statusbar-style>default</statusbar-style>
+ <statusbar-hidden>false</statusbar-hidden>
+ <fullscreen>false</fullscreen>
+ <navbar-hidden>false</navbar-hidden>
+ <analytics>true</analytics>
+ <guid>e9f4d455-7851-4115-b484-9dc5fd8e401a</guid>
+ <iphone>
+ <orientations device="iphone">
+ <orientation>Ti.UI.PORTRAIT</orientation>
+ </orientations>
+ <orientations device="ipad">
+ <orientation>Ti.UI.PORTRAIT</orientation>
+ <orientation>Ti.UI.UPSIDE_PORTRAIT</orientation>
+ <orientation>Ti.UI.LANDSCAPE_LEFT</orientation>
+ <orientation>Ti.UI.LANDSCAPE_RIGHT</orientation>
+ </orientations>
+ </iphone>
+ <android xmlns:android="http://schemas.android.com/apk/res/android">
+ </android>
+ <modules>
+ </modules>
+</ti:app>

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