Tag Archives: actionscript

Obfuscated Slider

By Zevan | November 16, 2009
CLICK HERE TO COPY
Actionscript:
  1. var slider:MovieClip = makeSlider();
  2. slider.addEventListener(Event.CHANGE, function(evt:Event):void{
  3.     trace(evt.currentTarget.percent);                                  
  4. });
  5.  
  6. function makeSlider():MovieClip{
  7.     var slider:MovieClip = MovieClip(addChild(new MovieClip()));
  8.     var circle:Sprite = Sprite(slider.addChild(new Sprite()));
  9.     with (circle.graphics) beginFill(0x000000), drawCircle(0,0,10);
  10.     var line:Shape = Shape(slider.addChild(new Shape()));
  11.     with (line.graphics) lineStyle(0,0x000000), lineTo(0, 100);
  12.     slider.x = slider.y = 100;
  13.     circle.addEventListener(MouseEvent.MOUSE_DOWN, function(evt:Event):void{ evt.currentTarget.startDrag(false, new Rectangle(0,0,0,100)), slider.addEventListener(Event.ENTER_FRAME, onChange) });
  14.     var stopIt:Function = function(){ stopDrag(), slider.removeEventListener(Event.ENTER_FRAME, onChange) };
  15.     stage.addEventListener(Event.MOUSE_LEAVE, stopIt);
  16.     stage.addEventListener(MouseEvent.MOUSE_UP, stopIt);
  17.     return slider;
  18. }
  19. function onChange(evt:Event):void { evt.currentTarget.percent = evt.currentTarget.getChildAt(0).y / 100, evt.currentTarget.dispatchEvent(new Event(Event.CHANGE)) }

This is a pretty nasty implementation of a basic slider. Just felt like writing some obfuscated code today... It could probably be made even more confusing with some additional tweaks...

Have a look at the swf over at wonderfl...

Posted in UI | Also tagged , | Comments closed

Bounce Ball Inside a Circle

By ascontest | November 9, 2009
CLICK HERE TO COPY
Actionscript:
  1. package  {
  2.     import flash.display.Shape;
  3.     import flash.display.Sprite;
  4.     import flash.geom.Point;
  5.  
  6.     /**
  7.      * Re: http://board.flashkit.com/board/showthread.php?t=797453
  8.      * @author makc
  9.      * @license WTFPLv2
  10.      */
  11.     public class BouncingBall extends Sprite{
  12.         public function BouncingBall () {
  13.             r = 10;
  14.             ball = new Shape;
  15.             ball.graphics.beginFill (0);
  16.             ball.graphics.drawCircle (0, 0, r);
  17.             addChild (ball);
  18.             v = new Point;
  19.             v.x = Math.random ();
  20.             v.y = Math.random ();
  21.             V = 1 + 20 * Math.random ();
  22.             v.normalize (V);
  23.             R = 200; X = 465 / 2; Y = 465 / 2;
  24.             graphics.lineStyle (0);
  25.             graphics.drawCircle (X, Y, R);
  26.             ball.x = X + 100;
  27.             ball.y = Y - 100;
  28.             addEventListener ("enterFrame", loop);
  29.         }
  30.         private var r:Number;
  31.         private var ball:Shape;
  32.         private var v:Point;
  33.         private var V:Number;
  34.         private var R:Number;
  35.         private var X:Number;
  36.         private var Y:Number;
  37.         private function loop (e:*):void {
  38.             ball.x += v.x;
  39.             ball.y += v.y;
  40.             // R-r vector
  41.             var P:Point = new Point (X - ball.x, Y - ball.y);
  42.             if (P.length> Math.sqrt ((R - r) * (R - r))) {
  43.                 // normalize R-r vector
  44.                 P.normalize (1);
  45.                 // project v onto it
  46.                 var vp:Number = v.x * P.x + v.y * P.y;
  47.                 // subtract projection
  48.                 v.x -= 2 * vp * P.x;
  49.                 v.y -= 2 * vp * P.y;
  50.                 v.normalize (V);
  51.                 // move away from bounding circle
  52.                 P = new Point (X - ball.x, Y - ball.y);
  53.                 while (P.length> Math.sqrt ((R - r) * (R - r))) {
  54.                     ball.x += v.x;
  55.                     ball.y += v.y;
  56.                     P = new Point (X - ball.x, Y - ball.y);
  57.                 }
  58.             }
  59.         }
  60.     }
  61. }

Makc3d said I could choose one of his excellent wonderfl.net pieces and submit it to the contest. This snippet creates a ball that bounces off the inside of a circle. I thought this was a pretty unique way to go about doing this - and found it easy to add gravity and other cool features to it.

Have a look at the swf over at wonderfl....

Some Makc3d links:
>> http://makc3d.wordpress.com/
>>http://code.google.com/p/makc/
>> http://wonderfl.net/user/makc3d

Makc3d elaborated on his code a bit via e-mail. He said that his technique sacrifices accuracy for simplicity... and that if you simplify too much it would be easy to break the code. "e.g. comment out piece of code where it says "move away from bounding circle""...

Here is a picture that Makc3d drew explaining why you need to multiply by 2:

Posted in motion | Also tagged , , | Comments closed

Google Analytics Utility

By ascontest | November 9, 2009
CLICK HERE TO COPY
Actionscript:
  1. package com.hapticdata.utils
  2. {
  3.     import flash.external.ExternalInterface;
  4.     /**
  5.      * Simplifies posting to Google's Analytics Tracker, allows easily disabling for development phase
  6.      * and uses ExternalInterface rather than navigateToURL
  7.      * @class Urchin
  8.      * @author Kyle Phillips - <a href="http://www.haptic-data.com">http://www.haptic-data.com</a>
  9.      * @created October 28, 2008
  10.      * @example Analytics.post("section");
  11.      */
  12.    
  13.    
  14.     public class Analytics
  15.     {
  16.        
  17.         public static var enabled:Boolean = true;
  18.         //appended as a directory to all trackings
  19.         public static var swfID:String="/flashevent/";
  20.         //correct for default snippet. Change this if you have a custom-wrapped analytics method
  21.         public static var functionToCall:String = "pageTracker._trackPageview";
  22.        
  23.         /**
  24.          * Will invoke the set javascript function
  25.          * @param location:String - a string identifying where the user is in the site
  26.          */
  27.         public static function post(location:String):void
  28.         {
  29.             if(enabled && ExternalInterface.available)
  30.             {
  31.                 ExternalInterface.call(functionToCall,swfID+location);
  32.             }
  33.         }
  34.     }
  35. }

This contest entry by Kyle Phillips is a utility class for dealing with google analytics. If you haven't messed with google analytics I suggest you give it a try.

Kyle Phillips links:
>> http://workofkylephillips.com
>> http://labs.hapticdata.com

I usually find myself adding google analytics code in a very hacky way... usually because the client asks for it at the 11th hour. Using a class like Kyle's would enable you to simply add the tracking code from the start and then if the client doesn't ask for it... you can just keep the class disabled... or charge more when you offer google analytics tracking for "phase 2" of the project ;)

Posted in external data, misc | Also tagged , , , | 2 Comments

Paste Your Interface

By Zevan | November 4, 2009

Are you working on something right now that makes use of interfaces? Copy and paste an interface into the comments of this post (no need for code tags or anything)....

CLICK HERE TO COPY
Actionscript:
  1. package app{
  2.    
  3.     import flash.events.IEventDispatcher;
  4.    
  5.     public interface IBaseModel extends IEventDispatcher{
  6.        
  7.         function set decimal(val:int):void;
  8.    
  9.         function get decimal():int ;
  10.        
  11.         function get stringValue():String;
  12.        
  13.         function get errorMessage():String;
  14.        
  15.         function set base(val:int):void;
  16.        
  17.         function get base():int;
  18.        
  19.         function startCounting(interval:Number, changeBy:Number):void;
  20.          
  21.         function stopCounting():void;
  22.     }
  23. }

Posted in OOP, misc | Also tagged , | 14 Comments