gistfile1.as

package {
	import com.mdiconcept.graphics.BezierCurve;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.geom.Point;
	
	/**
	 * ...
	 * @author Juan Pablo Califano <califa010@gmail.com>
	 */
	public class Main extends Sprite {
		
		private var _sp:Sprite;
		private var _bezierCurve:BezierCurve;
		private var _position:Number = 0;
		
		public function Main():void {
			if (stage) init();
			else addEventListener(Event.ADDED_TO_STAGE, init);
		}
		
		private function init(e:Event = null):void {
			removeEventListener(Event.ADDED_TO_STAGE, init);
			// entry point
			
			_sp = new Sprite();
			addChild(_sp);	
							
			var points:Array = [
				new Point(100,100),
				new Point(90,30),
				new Point(200,30),
				new Point(230,100),
				new Point(260,50),
			];
			
			_bezierCurve = new BezierCurve(points);
			
			addEventListener(Event.ENTER_FRAME,handleEnterFrame);
			
		}
		
		private function handleEnterFrame(e:Event):void {
			_position += 0.01;
			if(_position > 1) {
				_position = 0;
			}
			
			_sp.graphics.clear();
			
			_bezierCurve.drawCurveEnvelope(_sp.graphics,_position);
			
			_sp.graphics.lineStyle(2,0xff0000);
			_bezierCurve.draw(_sp.graphics,100);
			var bezierPoint:Point = _bezierCurve.getPointAtPosition(_position);
			
			_sp.graphics.lineStyle(0);
			_sp.graphics.drawCircle(bezierPoint.x,bezierPoint.y,3);
			_sp.graphics.endFill();		
			
			
			
		}
		
	}
	
}