flash on 2012-5-28

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

package {
    import flash.display.Sprite;
    import flash.events.*;
    import flash.text.*;
    public class FlashTest extends Sprite {
        private var s1:Sprite =new Sprite();
        private var angle1:Number = 0;
        private var angle2:Number = 0;
        private var tf1:TextField = new TextField();
        public function FlashTest() {
            // write as3 code here..
            addChild(s1);
            addChild(tf1);
            
            addEventListener(Event.ENTER_FRAME,onFrame);
        }
        private var cnt:int=0;
        private function onFrame(e:Event):void{
            cnt++;
            if(cnt<2)return;
            cnt=0;
            angle1-=Math.PI/18;
           //// if(angle1>Math.PI)angle1-=Math.PI*2;
           // else if(angle1<Math.PI)angle1+=Math.PI*2;
            angle1%=Math.PI*2;
            
            var n1:Number;
            
            n1 = angle1 - angle2;
            n1+=Math.PI*2;
            n1%=Math.PI*2;
            if(n1>Math.PI)n1-=Math.PI*2;
            
            tf1.text = "angle1: "+Math.round(angle1/Math.PI*180).toString();
            tf1.appendText("\nangle2: "+Math.round(angle2/Math.PI*180).toString());
            tf1.appendText("\nn1: "+Math.round(n1/Math.PI*180).toString());
            angle2 = angle1;
            
            with(s1.graphics){
                clear();
                lineStyle(1,0x000000);
                moveTo(100,100);
                lineTo(100+Math.cos(angle1)*50,100+Math.sin(angle1)*50);
            }

        }

    }
}