forked from: flash on 2010-3-23

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

// forked from bigfish's flash on 2010-3-23
package {

    import flash.display.Sprite;
    import flash.utils.getTimer;

    public class CircleDraw extends Sprite {
        
        private const NUM_POINTS:int = 100;
        private const RADIUS:Number = 100;
        private const TWOPI:Number = Math.PI*2;
        private var points:Vector.<Number> = new Vector.<Number>(NUM_POINTS*2);
        private var cmds:Vector.<int> = new Vector.<int>(NUM_POINTS+2);

        public function CircleDraw() {
            
            var start1:Number = getTimer();
            for(var c:int = 0; c < 1000; ++c)
            {
                trigDrawCircle();
                renderCircle();
            }
            var time1:Number = getTimer() - start1;
            trace(time1);
        }
        
        private function trigDrawCircle():void
        {
            cmds[0] = 1;
            var cx:Number = RADIUS + Math.random()*(stage.stageWidth - RADIUS*2);
            var cy:Number = RADIUS + Math.random()*(stage.stageHeight - RADIUS*2);

            for(var i:int = 0; i < NUM_POINTS*2; i+=2)
            {
                points[i] = cx + RADIUS*Math.cos(TWOPI*i/NUM_POINTS);
                points[i+1] = cy + RADIUS*Math.sin(TWOPI*i/NUM_POINTS);

                cmds[int(i*.5)] = i?2:1;
            }
            //cmds[NUM_POINTS+1] = 2;
        }

        private function renderCircle():void
        {
            graphics.lineStyle(0);
            graphics.drawPath(cmds, points);
        }

    }
}