private float x(TouchState s){
  final float currToTan=(float)Math.sqrt((s.distance * s.distance) - (mScaledTouchSlop * mScaledTouchSlop));
  return currToTan * (currToTan / s.distance);
}

private float x ( TouchState s ) { final float currToTan = ( float ) Math . sqrt ( ( s . distance * s . distance ) - ( mScaledTouchSlop * mScaledTouchSlop ) ) ; return currToTan * ( currToTan / s . distance ) ; }
the change in the x value that is required to move from the current touch point to the tangent .
