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STEP geometry: Boundaries

Other usage issuesTue, 02/19/2013 - 21:202 replies

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QuestionAuthor

Hello all,

I have a STEP geometry, a box. I can build a mesh from this geometry (with nglib) and I can explore the topology hierarchy, but i want to get and identify some boundaries (faces and edges) in order to create face groups.

At this point I wonder if it is possible to extract a submesh that corresponds to a topology, or in another way, if it is possible to identify each element (triangle or tetra), from the mesh, with any topology.

Are there any function/method for this?

I accept any suggest. Thanks! :D

Discussion

2 archived replies

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01Commenter-1

Hi Victor,
I bet the answer is no. Native Netgen-OCC binding does not support a notion of submesh and face-to-{set_of_elements} mapping. At least in 4.9.x.
You might want to consider Salome's SMESH which does this or make your own implementation of that.
Hope this helps.
Commenter-1
P.S. The question is probably more relevant to Netgen than to OCC forum though.

02Author

wow! what a quick response! Thanks :D

Ok, I will post the same message in the Netgen forum.

Anyway, i was reading some of the "Modeling Data User's Guide" and i find the "Extrema" in the geometry utilities. I think that knowing the distance of a point to an edge or a surface will be enought to know if this point belongs to the edge or the surface.

What do you know?