[Gmsh] Points not used by tetrahedrons

[Christophe Geuzaine]

> On 7 Sep 2020, at 16:05, Tian Xia <tianxia.ui at gmail.com> wrote:
> 
> Dear all, 
> 
> I am generating 3D tetrahedron mesh using gmsh Python API. I found some points are not used by the tetrahedrons. Is there a simple way to remove these points when exporting the *msh file? 

Yes: define a physical group (here a physical volume) for the entities you want to save, and Gmsh will only save nodes/elements discretizing those entities.

Christophe

> 
> Best Regards,
> Tian
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine