package
{
    import com.flashdynamix.motion.extras.MatrixTransform;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.display.GradientType
    import flash.geom.Matrix
    import flash.geom.Point;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    /**
     * ...
     * @author
     */
    public class Main extends Sprite
    {

        public function Main():void
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }


        private function degreesToXY(radius:Number, degree:Number):Point {
            var myPoint:Point = new Point()
            var radians:Number=Math.PI/180;
            myPoint.x = radius * Math.cos(degree*(radians));
            myPoint.y = radius * Math.sin(degree*(radians));
            return myPoint;
        }

        private function init(e:Event = null):void
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            // entry point

            var diag:Sprite = new Sprite();
            addChild(diag);
            diag.x = 400;
            diag.y = 400

            var radius:int = 250;

            var deg2rad:Number = Math.PI/180;
            var rad2deg:Number = 180 / Math.PI;

            var step:Number = 60;

            //for (var a:int = 0; a < 360; a = a + 20)
            for (var angle:int = 0; angle < 360; angle+=step )
            {

                var line:Sprite = new Sprite();
                diag.addChild(line);

                var p1x:Number = Math.cos(deg2rad * angle) * radius;
                var p1y:Number = Math.sin(deg2rad * angle) * radius

                var r:Number = Math.random() * 360

                var ang2:Number = (r - angle);

                var p1:Point = degreesToXY(radius, angle)
                var p2:Point = degreesToXY(radius, r)

                var txt1:TextField = new TextField();

                txt1.x = p1.x+8;
                txt1.y = p1.y-8;

                txt1.backgroundColor=0xFF0000
                txt1.textColor = 0xFFFFFF

                var txt2:TextField = new TextField();
                txt2.x = p2.x+8;
                txt2.y = p2.y-8;

                txt2.textColor = 0xFFFFFF
                txt2.backgroundColor = 0x0000FF
                txt1.autoSize = TextFieldAutoSize.LEFT
                txt1.text = angle/step + " (begin " + Math.round(angle) + "=>"+Math.round(r) + "="+Math.round(ang2)+")"
                txt2.text = angle/step + " (end)"

                diag.addChild(txt1);
                diag.addChild(txt2);


                var len:Number = Math.sqrt(Math.pow(p2.x - p1.x, 2) + (Math.pow(p2.y - p1.y, 2)))
                //var arbitraryLength:Number = len * Math.sin(deg2rad * 60)v
                var arbitraryLength:Number = 100;
                var a:Point = Point.interpolate(p1, p2, 0.5);
                var t:Point = new Point(p2.y - p1.y, -(p2.x - p1.x));
                t.normalize(arbitraryLength);

                a = a.add(t)

                var mxBox:Matrix = new Matrix();

                /*
                mxBox.createGradientBox(a.x, a.y, angle);
                mxBox.translate(p2x, p2y)
                mxBox.rotate(deg2rad * angle)
                */

                // draw the bezier
                line.graphics.lineStyle(2, 0, 0xFF0000,true);
                line.graphics.lineGradientStyle(GradientType.LINEAR,  [0x0000FF, 0xFF0000], [1,1], [0, 255], mxBox, "pad", "rgb");
                line.graphics.moveTo(p1.x, p1.y);
                line.graphics.curveTo(a.x, a.y, p2.x, p2.y);

                // draw the triangle {p1,p2,a}
                line.graphics.lineStyle(1, 0x00FF00, 0.2);

                line.graphics.moveTo(p1.x, p1.y);
                line.graphics.lineTo(p2.x, p2.y);

                line.graphics.moveTo(p1.x, p1.y)
                line.graphics.lineTo(a.x, a.y)

                line.graphics.moveTo(p2.x, p2.y)
                line.graphics.lineTo(a.x, a.y)


                // draw the outer circle
                var circle:Sprite = new Sprite();
                circle.graphics.lineStyle(1, 0xFFFFFF, 1, true)
                circle.graphics.drawCircle(0,0,radius);
                diag.addChild(circle)
            }



        }

    }

}