Who can tell me how to open the STEP file and display it? Thank you!
You may read the STEP file with OpenCascade kernel and then visualize it in a VTK scene after faceting (generating visualization mesh from a CAD model). Here is the project where this workflow is readily available: https://gitlab.com/ssv/AnalysisSitus
thank you Quaoar!
There is now a vtkOCCTReader in VTK able to read step files.