package {
	
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	
	public class GrowDot extends MovieClip {
		
		private var MAX_SCALE:Number;
		private var farthest:Number;
		
		
		public function GrowDot() {
			super();
			
			addEventListener(Event.ADDED_TO_STAGE, onStage);
		}
		
		
		
		private function onStage(e:Event):void {
			farthest = distanceSq(0, 0,  stage.stageWidth, stage.stageHeight);
			MAX_SCALE = Math.pow(farthest, .18);
			stage.addEventListener(MouseEvent.MOUSE_MOVE, onMove);
		}
		private function onMove(e:MouseEvent):void {
			var percent:Number = distanceSq(stage.mouseX, stage.mouseY,  x, y) / farthest;
			scaleX = scaleY = MAX_SCALE * percent;
		}
		
		static private function distanceSq(x1:Number, y1:Number,  x2:Number, y2:Number) {
			var dx:Number = x2 - x1;
			var dy:Number = y2 - y1;
			return dx*dx + dy*dy;
		}
	}
}