root/as3/PotrAs/samples/potras/algorithm/TraceTest.as

package
{
        import com.nitoyon.potras.*;
        import flash.display.*;
        import flash.geom.*;
        import flash.events.*;

        [SWF(width="320",height="320")]
        public class TraceTest extends Sprite
        {
                [Embed(source='data1.gif')]
                private var Data1:Class;

                private static const SCALE:int = 8;

                public function TraceTest():void
                {
                        var bmp:Bitmap = new Data1();
                        bmp.scaleX = bmp.scaleY = SCALE;
                        addChild(bmp);

                        var pathList:Array = PathList.create(bmp.bitmapData);
                        trace(pathList[0].priv.join("\n")  + "\n\n");
                        trace(pathList[1].priv.join("\n")  + "\n\n");
                        
                        var i:int = 0;
                        var j:int = 0;

                        var bmdOver:BitmapData = new BitmapData(bmp.bitmapData.width, bmp.bitmapData.height);
                        var bmpOver:Bitmap = new Bitmap(bmdOver);
                        bmpOver.scaleX = bmpOver.scaleY = SCALE;
                        bmpOver.alpha = 0.5;
                        addChild(bmpOver);

                        addEventListener("enterFrame", function(event:Event):void
                        {
                                var pt:Point = pathList[i].priv[j] as Point;
                                bmdOver.setPixel32(pt.x, pt.y, 0xffff0000);

                                if(++j >= pathList[i].priv.length)
                                {
                                        i++;
                                        j = 0;

                                        if(i >= pathList.length)
                                        {
                                                i = 0;
                                                bmdOver.fillRect(new Rectangle(0, 0, bmdOver.width, bmdOver.height), 0xffffffff);
                                        }
                                }
                        });
                }
        }
}