Easy to generate file format for efficient FreeCAD import

[crobar]

If you are working with linear segments there is no point in importing the data into CAD program, besides using the present mesh interfaces. If I understand you correctly, you currently do not intend to use the model in FreeCAD. But there is no purpose in saving a STEP file which bears the same information as a STL file.

Well, the idea is to be able to convert the shape I've created using an optimisation program to a form where it can be used in engineering drawings and manipulated by people who aren't using my custom system.

[crobar]

Here is a Python macro that might be useful

Thanks! This will certainly be useful for this particular case, but a more general solution, where it's not in fact a simple linear extrusion is still something I'd want ideally.