/// <summary>
///
/// </summary>
/// <param name="r0"></param>
/// <param name="r1"></param>
/// <returns></returns>
public static Quaterniond CreateFromTo(Quaterniond r0, Quaterniond r1)
{
return(r1.Apply(r0.Inverse));
}
/// <summary>
/// Applies the given rotation to this object.
/// </summary>
/// <param name="rotation"></param>
public void Rotate(Quaterniond rotation)
{
SetOrthoXY(rotation.Apply(_x), rotation.Apply(_y));
}