Actionscript:
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package com.hapticdata.utils
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{
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import flash.external.ExternalInterface;
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/**
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* Simplifies posting to Google's Analytics Tracker, allows easily disabling for development phase
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* and uses ExternalInterface rather than navigateToURL
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* @class Urchin
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* @author Kyle Phillips - <a href="http://www.haptic-data.com">http://www.haptic-data.com</a>
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* @created October 28, 2008
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* @example Analytics.post("section");
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*/
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public class Analytics
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{
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public static var enabled:Boolean = true;
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//appended as a directory to all trackings
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public static var swfID:String="/flashevent/";
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//correct for default snippet. Change this if you have a custom-wrapped analytics method
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public static var functionToCall:String = "pageTracker._trackPageview";
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/**
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* Will invoke the set javascript function
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* @param location:String - a string identifying where the user is in the site
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*/
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public static function post(location:String):void
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{
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if(enabled && ExternalInterface.available)
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{
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ExternalInterface.call(functionToCall,swfID+location);
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}
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}
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}
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}
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 
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)....
Actionscript:
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package app{
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import flash.events.IEventDispatcher;
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public interface IBaseModel extends IEventDispatcher{
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function set decimal(val:int):void;
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function get decimal():int ;
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function get stringValue():String;
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function get errorMessage():String;
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function set base(val:int):void;
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function get base():int;
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function startCounting(interval:Number, changeBy:Number):void;
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function stopCounting():void;
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}
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}
Also posted in OOP | Tagged actionscript, as3, flash |
By Zevan | October 29, 2009
Actionscript:
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[SWF(width = 100, height = 100)]
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var circle:Shape = new Shape();
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with(circle.graphics) beginFill(0x000000), drawCircle(20,20,20);
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var currFrame:Frame;
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// populate the linked list
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generateAnimation();
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var canvas:BitmapData = new BitmapData(stage.stageWidth,stage.stageHeight,false, 0x000000);
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addChild(new Bitmap(canvas));
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var loc:Point = new Point(20, 20);
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addEventListener(Event.ENTER_FRAME, onLoop);
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function onLoop(evt:Event):void {
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// clear the canvas
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canvas.fillRect(canvas.rect, 0x000000);
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// draw the current frame
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canvas.copyPixels(currFrame.bitmap, currFrame.bitmap.rect, loc, null, null, true);
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// get the next frame of the animation
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currFrame = currFrame.next;
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}
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// generate and capture 40 bitmaps by altering the colorTransform of the circle shape
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function generateAnimation():void{
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var channel:uint = 0;
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var ct:ColorTransform = new ColorTransform();
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var increase:Boolean = true;
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var firstFrame:Frame;
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var pFrame:Frame;
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for (var i:int = 0; i<40; i++){
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if (increase){
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channel += 10;
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if (channel == 200){
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increase = false;
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}
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}else{
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channel -= 10;
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}
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ct.color = channel <<16 | channel <<8 | channel;
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circle.transform.colorTransform = ct;
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// populate linked list
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currFrame = capture(circle);
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if (pFrame){
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pFrame.next = currFrame;
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}
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if (i == 0){
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firstFrame = currFrame;
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}
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pFrame = currFrame;
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}
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// close the list
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currFrame.next = firstFrame;
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currFrame = firstFrame;
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}
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// create the Frame instance and draw the circle to it
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// preserving the colorTransform information
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function capture(target:Shape):Frame{
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var frame:Frame = new Frame();
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frame.bitmap = new BitmapData(target.width, target.height, true, 0x00000000);
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frame.bitmap.draw(target, null, target.transform.colorTransform);
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return frame;
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}
Requires this little Frame class
Actionscript:
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package {
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import flash.display.*;
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final public class Frame{
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public var bitmap:BitmapData;
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public var next:Frame;
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}
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}
This is a small test I did today to see how easy it would be to use a circular linked list to loop an animation of bitmaps. I did this because I was thinking about using some animated sprites in conjunction with Utils3D.projectVectors() to do an orthographic 3D demo with lots of animating sprites. In the past I've had up to 7,000 animated sprites running nicely using arrays and copyPixels... figured it would be interesting to try and do the same with a circular linked list.
When compiled, this test simply draws a circle that fades from black to gray and back again... Pretty boring, but I threw it up over at wonderfl anyway... check it out.
I recently saw a few tweets (forget who from) about using the final keyword on linked list nodes... haven't tested it myself but it's supposed to be faster...
By Zevan | October 20, 2009
Actionscript:
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[SWF(width = 500, height = 500)]
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var txt:TextField = TextField(addChild(new TextField()));
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txt.defaultTextFormat = new TextFormat("_sans", 4);
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txt.width = stage.stageWidth;
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txt.height = stage.stageHeight+4;
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txt.z = -1;
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txt.x = stage.stageWidth
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txt.rotation = 90;
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var count:int = 0;
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addEventListener(Event.ENTER_FRAME, onLoop);
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function onLoop(evt:Event):void{
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count++;
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txt.appendText(triangular(count).toString(2) + "\n");
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txt.scrollV= txt.maxScrollV;
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}
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function triangular(n:int):int{
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return (n * (n + 1)) / 2;
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}
Calculate some triangular numbers... (n * (n + 1)) / 2....
Check out the swf on wonderfl
Also posted in Math | Tagged actionscript, as3, flash |