private float angle(TouchState s){
  return (float)Math.toDegrees(Math.atan2(s.yDown - s.yCurrent,s.xDown - s.xCurrent));
}

private float angle ( TouchState s ) { return ( float ) Math . toDegrees ( Math . atan2 ( s . yDown - s . yCurrent , s . xDown - s . xCurrent ) ) ; }
angle between the current touch coordinates and the down coordinates
