There is some human logic to the origin/rest rotation of most LDraw parts. But I don't think you could use those rules to automate conversion transformations.
Far as I know the only thing you can correct for automatically is the negative y axis. This is done by rotating e.g. 180 degrees around the x axis.
Other differences you will have to put in some kind of pep part transformation look up table I guess.
Far as I know the only thing you can correct for automatically is the negative y axis. This is done by rotating e.g. 180 degrees around the x axis.
Other differences you will have to put in some kind of pep part transformation look up table I guess.