how to edit *.IGES file

I just learn opencascade ,I found that it can import the *.IGES file.but I don't know how to edit this file ,so I need your help.
Thank you.

Fabian Hachenberg's picture

During import, Open CASCADE creates a representation of your IGES data using Open CASCADE data structures. You can edit your file by modifying the created data structures (edges, faces, solids, ...) and exporting the result back to IGES