package org.Geometria{
	import flash.display.*;
	import flash.utils.*;
	import flash.geom.Point;
	import flash.events.*;
	public class PolarCurve extends MovieClip {
		protected var teta:Number=0;
		protected var maxTeta:Number=uint.MAX_VALUE;
		protected var speed:Number=0.1;
		private var old,current:Point=null;
		private var lineColor:uint=0;

		public function PolarCurve() {

		}
		public function disegna():void {
			addEventListener(Event.ENTER_FRAME,disegna_);
		}
		public function stoppa():void {
			removeEventListener(Event.ENTER_FRAME,disegna_);
		}
		public function setColor(col:uint) {
			lineColor=col;
		}
		private function disegna_(event:Event):void {
			current=new Point();
			var effe:Number=f();
			current.x=effe*Math.cos(teta);
			current.y=effe*Math.sin(teta);
			if (old!=null) {
				var linea:Shape=new Shape();
				linea.graphics.lineStyle(0,lineColor);
				linea.graphics.moveTo(old.x,old.y);
				linea.graphics.lineTo(current.x,current.y);
				addChild(linea);
			}
			old=current;
			teta+=speed;
			if (teta>maxTeta) {
				removeEventListener(Event.ENTER_FRAME,disegna_);
			}
			current=null;
		}
		protected function f():Number {
			return 0;
		}
	}
	
}