Add shell type to STEP importer, to fix importing of some STEP files

[scottmudge]

I had a couple STEP files that were not importing for whatever reason. After throwing OrcaSlicer in a debugger, I noticed the shape_type of the imported object was a 'shell', which should still work for STEP->STL/mesh conversion.

I added the TopAbs_SHELL type to getNamedSolids(...), and indeed it imported fine. Not sure why this shape type was not added to begin with, but adding it seemed to improve support for a variety of STEP files.

I've attached an example of a file that would not import before, but imports fine now.

gear-example.step.gz

[SoftFever]

I had a couple STEP files that were not importing for whatever reason. After throwing OrcaSlicer in a debugger, I noticed the shape_type of the imported object was a 'shell', which should still work for STEP->STL/mesh conversion.

I added the TopAbs_SHELL type to getNamedSolids(...), and indeed it imported fine. Not sure why this shape type was not added to begin with, but adding it seemed to improve support for a variety of STEP files.

I've attached an example of a file that would not import before, but imports fine now.

gear-example.step.gz

Thank you so much.
The change makes sense to me.
I will do some tests

[SoftFever]

The fix works well.
Thank you