public static Matrix3d P2M(this Viewport vp)
{
if (vp.PerspectiveOn)
{
return(new Matrix3d());
}
if (vp.Number == 1)
{
return(new Matrix3d());
}
return(vp.Dcs2Wcs() * vp.Dcs2Psdcs().Inverse());
}
/// <summary>
/// Gets the transformation matrix from the Paper Space Display Coordinate System (PSDCS)
/// to the specified paper space viewport Display Coordinate System (DCS).
/// </summary>
/// <param name="vp">The instance to which this method applies.</param>
/// <returns>The PSDCS to DCS transformation matrix.</returns>
public static Matrix3d Psdcs2Dcs(this Viewport vp)
{
return(vp.Dcs2Psdcs().Inverse());
}