flash on 2015-10-5

/**
 * Copyright mutantleg ( http://wonderfl.net/user/mutantleg )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/4FxD
 */

package {
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            
            stage.addEventListener(Event.ENTER_FRAME, onEnter);
        }//ctor
        
        public function onEnter(e:Event):void
        {
            graphics.clear();
            graphics.lineStyle(2, 0);
            
            
            var cx:Number; var cy:Number;
            cx = 230; cy = 230;
            
            var vx:Number; var vy:Number;
            var ta:Number; ta = 0.7;
            vx = Math.cos(ta)*64;
            vy = Math.sin(ta)*64;
            
            
            graphics.drawCircle(cx,cy, 8);
            graphics.moveTo(cx,cy);
            graphics.lineTo(cx+vx,cy+vy);
            
            
            var nx:Number; var ny:Number;
            
            
            ta = 0.7+3.14;
           // ta = 0.3+3.14;
            
            ta = Math.atan2(300-stage.mouseY,100-stage.mouseX);
            nx = Math.cos(ta) ;
            ny = Math.sin(ta) ;
            
            graphics.drawCircle(100, 300, 8);
            graphics.moveTo(100, 300);
            graphics.lineTo(100+nx*64, 300+ny*64);
            
            
            var dot:Number;
            dot = nx*vx + ny*vy;
            
            var kx:Number; var ky:Number;
            kx = nx * -dot;
            ky = ny * -dot;
            
            graphics.lineStyle(2, 0xFF);
            graphics.moveTo(cx,cy);
            graphics.lineTo(cx+kx,cy+ky);
            
            vx += kx;
            vy += ky;
            
            graphics.lineStyle(2, 0xFF0000);            
            graphics.moveTo(cx,cy);
            graphics.lineTo(cx+vx,cy+vy);
            
            
        }//onenter
        
        
    }//classend
}