Get Rotation of a Group or Object

[jmaida]

I have examining the file format for rotation values. The description of the format says that there a field called "rot" followed by values of the rotation matrix. After rotating objects and groups of objects all over the place and saving the file at various steps of the process, I failed to find "rot" anywhere in the saved file. It appears that a rotation is applied to the vertices then simply forgotten. However, that does not seem to be the case for translations. This seems to me to be an odd inconsistancy and an omission of some useful information that is needed to restore the initial condition of object.