/// <summary>
///
/// </summary>
/// <param name="direction"></param>
/// <param name="up"></param>
/// <returns></returns>
public static Quaterniond CreateLookAt(Vector3d direction, Vector3d up)
{
// impl ref
// http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-17-quaternions/
return(new Quaterniond(OrthoBasis3d.CreateLookAt(direction, up)));
}
/// <summary>
///
/// </summary>
/// <param name="eye"></param>
/// <param name="target"></param>
/// <param name="up"></param>
/// <returns></returns>
public static Orient3d CreateLookAt(Vector3d eye, Vector3d target, Vector3d up)
{
return(new Orient3d(OrthoBasis3d.CreateLookAt(target - eye, up), eye));
}
