// quadrant the angle is in... Though, if the y-coordinate of the vector is
// negative, that means that the angle is in quadrants III - IV.
double rawAngle = acos(Unit().x);
// quadrant the angle is in... Though, if the y-coordinate of the vector is
// negative, that means that the angle is in quadrants III - IV.
double rawAngle = acos(Unit().x);