Hi Michael,

>But for example I can't remember ever seeing an IGES part that was not oriented with Z-Up, I'm not quite sure if it is absolutely specified >to be that in the IGES spec but it is certainly the standard convention.
>I've got some IGES parts from SolidWorks before and they seem to remap their coordinates to fit the standard convention there during their >export.

There is no re-mapping on export of iges from solidworks, it is just a case that in SW Y is up, Z if forward, the output is simply xyz co-ordinates, so when imported into MoI then Z is up.


>Similarly they should pay attention to the standard convention of the 3DM coordinate system when they read 3DM data

SW reads the data and places the object according to its XYZ coordinates, it is just a case that Z if forward and the top plane is X/Z.


- Steve