Sewing faces / keep track of sewed faces - Forum Open Cascade Technology

Samuel Vogel
Thu, 11/17/2016 - 14:10

Forums:

Hello,

I have a question regarding the sewing of faces to a (manifold) shell. How can I determine the matching of the initial faces i added to sew and the faces of the resulting shell. If I just loop over the faces of the shell with an explorer, the order of faces (in the ordering of adding the faces to the brepbuilderapi_sewing) is not retained in all cases. How can I determine the assignment of the original faces to the faces of the resulting shell?

Thanks,

Samuel

qa qa
Thu, 11/17/2016 - 14:30

Hello, Samuel

you can use ModifiedSubShape(originalShape) method. If it returns empty shape then sewer don't modified originalShape.

TopoDS_Shape F = Sewer.ModifiedSubShape(originalShape);
const TopoDS_Shape& SewingResult = F.IsNull()? originalShape: F;

qa qa

Samuel Vogel
Thu, 11/17/2016 - 14:45

Thanks a lot.

Ok. Then I get the the information if it was modified. But do you have an idea how I still can get the matching of the original faces to the sewed faces (my original problem)?

Samuel

qa qa
Thu, 11/17/2016 - 14:57

This piece of code does this. SewingResult shape contains result of sewing. You can use it to build map of (originalFace, sewedFace).

qa qa

Samuel Vogel
Thu, 11/17/2016 - 15:05

Thanks a lot.

I try it...

Samuel