Tag Archives: flash

Bounds 3 Ways

By Zevan | May 21, 2009
CLICK HERE TO COPY
Actionscript:
  1. // make a complex poly and position it randomly
  2. var poly:Sprite = Sprite(addChild(new Sprite()));
  3. poly.graphics.lineStyle(3, 0xFF0000);
  4. poly.graphics.beginFill(0x00FF00);
  5. for (var i:int = 0; i<10; i++) {
  6.     poly.graphics.lineTo(Math.random()*100 - 50, Math.random()*100 - 50);
  7. }
  8. poly.x=Math.random()*stage.stageWidth;
  9. poly.y=Math.random()*stage.stageHeight;
  10.  
  11. // get bound information:
  12.  
  13. // is in pixels (whole numbers)
  14. trace("pixelBounds: ", poly.transform.pixelBounds);
  15. // doesn't include stroke width
  16. trace("getBounds: ", poly.getBounds(this));
  17. // includes stroke width
  18. trace("getRect: ", poly.getRect(this));

Three different ways to get the boundaries of a DisplayObject.

Posted in DisplayObject | Also tagged | 1 Comment

More Messy Code

By Zevan | May 20, 2009
CLICK HERE TO COPY
Actionscript:
  1. var size:Number = 800;
  2. var canvas:BitmapData = new BitmapData(size,size,false, 0x000000);
  3. addChild(new Bitmap(canvas, "auto", true));
  4.  
  5. scaleX = scaleY = .5;
  6. var pix:Number = size * size;
  7. var scale:Number = 1/(size/3);
  8.  
  9. for (var i:Number = 0; i<pix; i++){
  10.        var xp:Number = (i % size);
  11.        var yp:Number = int(i / size);
  12.        var xt:Number = xp * scale;
  13.        var yt:Number = yp * scale;
  14.        var ca:Number =  (Math.abs(Math.tan(yt) * Math.pow(Math.sin(xt),3)) * 100 ) % 155;
  15.        var cb:Number =  (Math.abs(Math.tan(xt) * Math.pow(Math.sin(yt),3)) * 100)  % 155;
  16.        ca|= cb;
  17.        canvas.setPixel(xp, yp,  ca <<16 | ca <<8 | ca);
  18. }

Another messy code snippet that I e-mailed to myself at some point...

Try replacing line 16 with some of these variations:

ca &= cb;
ca += cb;
ca -= cb;
ca ^= cb;
ca %= cb

Posted in BitmapData, misc, pixel manipulation, setPixel | Also tagged | Leave a comment

QuickBox2D Documentation

By Zevan | May 18, 2009

I finally finished the QuickBox2D documentation. Check it out here.

You can download QuickBox2D and see a few example code snippets on the QuickBox2D page. Should have a tutorial on that page in the next couple of days.

Posted in Box2D, QuickBox2D, motion | Also tagged | 5 Comments

Instantiate and Set Properties

By Zevan | May 17, 2009
CLICK HERE TO COPY
Actionscript:
  1. function create(obj:Class, props:Object):*{
  2.     var o:* = new obj();
  3.     for (var p:String in props){
  4.         o[p] = props[p];
  5.     }
  6.     return o;
  7. }
  8.  
  9. // test out the function
  10.  
  11. var txt:TextField = create(TextField, {x:200, y:100, selectable:false, text:"hello there", textColor:0xFF0000, defaultTextFormat:new TextFormat("_sans", 20)});
  12. addChild(txt);
  13.  
  14. var s:Sprite = Sprite(addChild(create(Sprite, {x:100, y:100, rotation:45, alpha:.5})));
  15.  
  16. with (s.graphics) beginFill(0xFF0000), drawRect(-20,-20,40,40);
  17.  
  18. var blur:BlurFilter = create(BlurFilter, {blurX:2, blurY:8, quality:1});
  19.  
  20. s.filters = [blur];

This snippet shows a function called create() that takes two arguments. The first argument is the name of a class to instantiate. The second is an Object with a list of properties to set on a newly created instance of the class (referenced in the first argument).

This could be particularly useful for TextFields which for some reason have no arguments in their constructor.

This will currently only work for classes that have either all optional constructor arguments or no constructor arguments.

Posted in dynamic, functions, one-liners, properties | Also tagged | Comments closed