[Gmsh] neighbors+ruled surfaces

[David Colignon]

Denis Martynov wrote:
> Dear sir!
> My name is Denis Martynov, I'm a student of Moscow Institute of Physics 
> and Technology, department of general and applied physics. My science 
> team needs tetrahedral meshes in physical space for solving our tasks. 
> At this stage I build mesh using GMSH, then save it using binary .msh 
> format, and then load this file to my C++ program. Now I have to find 
> out for each tetrahedron its neighbours myself and this takes some 
> time...I wonder if GMSH can type a list of neighbors for each 
> tetrahedron? 

Hi Denis,

no, Gmsh cannot give you "out of the box" a list of neighbors for each tetrahedron. I suppose it has these connectivity 
information in its internal meshing database, but you would have to modify the source code to query and output these 
informations in a new mesh format that you will define.

Regards,

Dave

-- 
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
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I use Delaynay algorithm that is optimized by Netgen.
> And I have another question. It is actual if GMSH can't type neighbors 
> of each tetrahedron. This is about ruled surfaces. In GMSH tutorial one 
> can read about ruled surface: "a surface that can be interpolated using 
> transfinite interpolation". How can I get the equation of the surface to 
> define which tetrahedrons border this surface?
> Sincerely,
> Denis Martynov.
> 
> 
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