/// <summary>
/// Applies the given rotation to this object.
/// </summary>
/// <param name="rotation"></param>
public void Rotate(ref AxisAngle3d rotation)
{
SetXY(rotation.Apply(_x), rotation.Apply(_y));
}
/// <summary>
/// Applies the given rotation to the axis of this rotation.
/// </summary>
/// <param name="rotation"></param>
public void RotateAxis(AxisAngle3d rotation)
{
_axis = rotation.Apply(_axis);
}