#871: Hierarchical STEP Importer/Exporter

[vejmarie]

Hi,

I just made some homework I promised to easyw, to enhance our STEP Importer/Exporter capabilities. With the new App::Part object and some additionnal C++ code, we are now able to export native FreeCAD assembly tree into STEP files and re-read them.

I am using the Placement feature to run with relative placement of the various object instead of using absolute placement which made STEP file integration harder

https://github.com/FreeCAD/FreeCAD/pull/871

The PR doesn't go through the MacOS test case, but the issue reported are not related to my code, looks like something is broken there, so if you could integrate it, it might be great to enhance StepUp tool !

[yorik]

Yes the compile error is because of a FEM issue that has been solved already. I'm committing your PR now...

[vejmarie]

thanks !