[Gmsh] Physical group associated with elements

[Christophe Geuzaine]

> On 15 Oct 2018, at 21:47, Xin Liu <lambert8809 at gmail.com> wrote:
> 
> Dear Developers,
> 
> I am trying to use the new Gmsh API with SDK to build applications, and I found it is very handy. Thank you for providing such a good tool. Now, I am working on mechanics of composite materials, and very often, I need to get information about the physical group of each element as different materials are assigned to different regions. I notice the V4 mesh format arranges the elements in order of the physical groups, but how can I get such information using API? I also notice the current API provides "getNodesForPhysicalGroup", so I would expect some functions like "getElementsForPhysicalGroup"


Use getEntitiesForPhysicalGroup(), then getElements()


> or better "getPhysicalGroupForElements" which takes input elementID and returns PhysicalGroupID.

That would be quite inefficient, as querying elements individually is slow.

Christophe

> 
> Thanks
> 
> -- 
> ======================================
> Xin Liu
> PhD Candidate, Graduate Research Assistant
> Multiscale Structural Mechanics Group
> School of Aeronautics & Astronautics
> Purdue University
> ======================================
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

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