Same as the Bitmaps HitTest v01 sample, i use BitmapData.loadBitmap() to load a bitmap from the library. This is more direct rather then creating a new BitmapData instance and using the BitmapData.draw() to create the bitmap.
var bm:BitmapData=BitmapData.loadBitmap("pixelStretch");
Here i use Robert Penner Easing Class to animate the stretching from left to right.
Speed can be adjust through the slidebar.
// variables needed for robert penner easing
// set the inital distance var b:Number=0; // set the destination distance var e:Number=500; // find the diff in distance var c:Number=e-b; // set the duration for the tween var d:Number=200; // set timer to 0 var t:Number=0;
// create 2 BitmapData instance to load the bitmap var bm:BitmapData=BitmapData.loadBitmap("pixelStretch"); var bmf:BitmapData=bm.clone();
// create a movieclip to perform the pixel stretch var mc:MovieClip=createEmptyMovieClip("mc",getNextHighestDepth());
mc._y=15;
this.onEnterFrame=function(){
pixel();
}
function pixel():Void{
// perform easing and return the value into a variable with(this){
var n:Number=Linear.easeInOut(t++,b,c,d); if(t>d) delete this.onEnterFrame;
}
var w=bm.width; var h=bm.height;
// copypixels to ensure a sharp image is created
bmf.copyPixels(bm,new Rectangle(0,0,w,h),new Point(0,0));
while(h--){
// return new rectangle of height 1 var r:Rectangle=new Rectangle(n,h,w,1); // return an ARGB value that conatin alpha channel and RGB data
//
getPixel only return RGB, without the alpha data) var c:Number=bm.getPixel32(n,h); // fills a rectangular area of pixels with a specified ARGB color
bmf.fillRect(r,c);
}
// attach bitmap to movieclip
mc.attachBitmap(bmf,1);
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