[Gmsh] R: information on generated mesh

[Alessandro Vicini]

In my case this mesh "pre-processing" may be a bit time consuming, when mesh size begins to grow, that's why I was wondering if the information could be obtained directly from gmsh...

A.



-----Messaggio originale-----
Da: Jose Paulo Moitinho de Almeida [mailto:moitinho at civil.ist.utl.pt] 
Inviato: martedì 11 ottobre 2016 13.07
A: gmsh at onelab.info
Cc: jeremy theler; Alessandro Vicini; Luiz Fernando Martha
Oggetto: Re: [Gmsh] information on generated mesh


"Me too"

We created a matlab class that from a .msh file (2D or 3D) creates a topological data structure of the mesh (*). After that functions like 

[ cell_edges, cell_verts ] = prob.mesh.get_ev_c(elem);

[ cell_faces, cell_edges, cell_verts ] = prob.mesh.get_fev_c(elem);

for a 2D or a 3D mesh respectively, are processed "efficiently". 

(Note that all the other topological queries are available.)

ZP

(*) described in "IBHM: index-based data structures for 2D and 3D hybrid meshes" http://link.springer.com/article/10.1007/s00366-015-0395-0


On Tuesday 11 October 2016 09:56:14 jeremy theler wrote:
> Hi Alessandro! Find below some historic questions similar to yours...
> Long story short: I did the same you did.
> 
> http://onelab.info/pipermail/gmsh/2011/006878.html
> http://onelab.info/pipermail/gmsh/2011/006881.html
> http://onelab.info/pipermail/gmsh/2012/007480.html
> http://onelab.info/pipermail/gmsh/2013/008183.html
> http://onelab.info/pipermail/gmsh/2014/008833.html
> http://onelab.info/pipermail/gmsh/2014/008914.html
> http://onelab.info/pipermail/gmsh/2015/009739.html
> http://onelab.info/pipermail/gmsh/2015/009920.html
> 
> --
> Jeremy Theler
> www.seamplex.com
> 
> 
> On Tue, Oct 11, 2016 at 5:09 AM Alessandro Vicini <
> 
> alessandro.vicini at sitael.com> wrote:
> > In my code I need to know the list of neighbor nodes of each grid node,
> > and the list of neighbor cells of each grid cell, so I wrote a routine
> > to get this information, but I was wondering whether it would be possible
> > to obtain it directly from Gmsh….
> > 
> > 
> > 
> > Alessandro
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
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