def rotate_x(pt: Vector3, rad: float) -> Vector3:
y_ = pt.y * cos(rad) - pt.z * sin(rad)
z_ = pt.y * sin(rad) + pt.z * cos(rad)
pt.y = y_
pt.z = z_
return pt
def rotate_z(pt: Vector3, rad: float) -> Vector3:
x_ = pt.x * cos(rad) - pt.y * sin(rad)
y_ = pt.x * sin(rad) + pt.y * cos(rad)
pt.x = x_
pt.y = y_
return pt