forked from: flash on 2010-3-1

/**
 * Copyright PESakaTFM ( http://wonderfl.net/user/PESakaTFM )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/aPtx
 */

// forked from hosaka893's flash on 2010-3-1
package {
    import flash.display.Sprite;
    import flash.display.Graphics;
    import flash.events.Event;
    
    public class FlashTest extends Sprite {
            public var rot:Number = 0;
            
        public function FlashTest() {
            // write as3 code here..
            addEventListener(Event.ENTER_FRAME, onEnter);
        }
        
        public function onEnter(event:Event):void
        {
                rot += .02;
                
                graphics.clear();
            graphics.lineStyle(1,0);
            graphics.beginFill(0xFFFF00,1);
            drawStar(graphics, 100, 100, 50, 20, rot);
            drawPentagram(graphics, 200, 200, 50, -rot);
            graphics.endFill();
        }
        
        /**
         *  @public
         *  Draws a pentagram (without the circle).
         *
         *  @param g        The Graphics object you want to draw to.
         *  @param _x    The x value of the center
         *  @param _y    The y value of the center
         *  @param r        The radius of the circle which we use make an even pentagram
         *  @param rot    The rotation in radians
         **/
        public function drawPentagram(g:Graphics, _x:Number=0, _y:Number=0, r:Number=50, rot:Number=0):void
        {
            var angle:Number = rot+Math.PI/2;
            var px:Number = _x+Math.cos(angle)*r;
            var py:Number = _y+Math.sin(angle)*r;
            
            g.moveTo(px,py);
            for(var i:int=0; i<5; i++)
            {
                angle += 4*Math.PI/5;
                px = _x+Math.cos(angle)*r;
                py = _y+Math.sin(angle)*r;
                g.lineTo(px,py);
            }
        }
        
        /**
         *  @public
         *  Draws a star shape.
         *
         *  @param g            The Graphics object you want to draw to.
         *  @param _x        The x value of the center
         *  @param _y        The y value of the center
         *  @param outer        The distance of the outer points from center
         *  @param inner        The distance of the inner points from center
         *  @param rot        The rotation in radians
         **/
        public function drawStar(g:Graphics, _x:Number=0, _y:Number=0, outer:Number=50, inner:Number=20, rot:Number=0):void
        {
            var angle:Number = rot+Math.PI/2;
            var px:Number = _x+Math.cos(angle)*outer;
            var py:Number = _y+Math.sin(angle)*outer;
            
            g.moveTo(px,py);
            for(var i:int=0; i<5; i++)
            {
                angle += Math.PI/5;
                px = _x+Math.cos(angle)*inner;
                py = _y+Math.sin(angle)*inner;
                g.lineTo(px,py);
                
                angle += Math.PI/5;
                px = _x+Math.cos(angle)*outer;
                py = _y+Math.sin(angle)*outer;
                g.lineTo(px,py);
            }
        }
    }
}