[Gmsh] [GMSH] remeshing capabilities

[Christophe Geuzaine]

Pierre JUILLARD wrote:
> Thank you very much for this information!
> 
> Is it possible to know the title of this paper, so that I can find it?
> Also, do the examples illustrate this feature in GMSH (I mean, is it 
> possible to see how the *.geo file look like to see what kind of 
> commands should be used and do some trials with a mesh of my own?)?
> 
> Finally, just out of curiosity, does it replace the remeshing feature 
> which was existing in former GMSH versions, and that Christophe
> talked about in this email 
> http://www.geuz.org/pipermail/gmsh/2007/002719.html?

Yes. Here is a small example: reparam.geo will load the fine mesh in 
input.msh and coarsen it.

Note that the interfaces to these new capabilities are not documented 
and still in flux. They will likely change in the future...



> 
> I thank you very much again!
> 
> Best regards,
> 
> Pierre
> 
> 
> 2009/9/20 Jean-Francois Remacle <Jean-Francois.Remacle at uclouvain.be 
> <mailto:Jean-Francois.Remacle at uclouvain.be>>
> 
>     Helo,
> 
>     There is indeed a new stuf about that. We have a paper that
>     has just been accepted in IJNME. It is now possible to reparametrize
>     triangulated surfaces and therefore remes them. I have cc the
>     mail to my colleague emilie that has also worked on the paper
>     and that has maybe one or 2 biomedical examples that illustrate
>     the new stuff
> 
>     JF
> 
>     Le 19-sept.-09 à 23:00, Pierre JUILLARD a écrit :
> 
>>
>>     Hi Jean-François.
>>
>>     Yes, this is what I mean.
>>     I would like to remesh a initial mesh deformed using the thin
>>     plate transform algorithm from the VTK library (basically, it is a
>>     deformation using morphing). After this deformation, the original
>>     CAD is not representative anymore of the the shape I finally have,
>>     and I would like to remesh it such that it is suitable for FE
>>     calculations using standard meshing parameters that I can use in
>>     GMSH when I'm using it to mesh a CAD geometry.
>>
>>     To have a relevant new deformed shape (after morphing), I think to
>>     apply the morphing on a very fine mesh, such that even where there
>>     is no geometrical features before morphing, new ones can be
>>     represented after morphing (creation of a local bending or
>>     stiffner for instance). Will very fine meshes be a problem to
>>     remesh in coarser one?
>>
>>     Any help and advices would really be appreciated.
>>     Best regards,
>>
>>
>>     Pierre
>>
>>
>>
>>     2009/9/19 Jean-Francois Remacle
>>     <jean-francois.remacle at uclouvain.be
>>     <mailto:jean-francois.remacle at uclouvain.be>>
>>
>>
>>         Le 19-sept.-09 à 00:15, Pierre JUILLARD a écrit :
>>
>>
>>             Hi alll,
>>
>>             Interested in remeshing, I had a search on the net to see
>>             if there is such a capability in GMSH.
>>             It seemed so in GMSH 1.61, but seems to have been removed
>>             since.
>>
>>
>>         You mean remeshing of triangulated surfaces without cad (STL's
>>         for example ?)
>>
>>             Please could you tell me if it is foreseen to re-introduce
>>             this feature, and if so, when it is foreseen?
>>             I thank you in advance.
>>
>>             Best regards,
>>
>>             Pierre
>>
>>             _______________________________________________
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>>             gmsh at geuz.org <mailto:gmsh at geuz.org>
>>             http://www.geuz.org/mailman/listinfo/gmsh
>>
>>
>>         ----------------
>>         Prof. Jean-Francois Remacle
>>         Universite catholique de Louvain (UCL)
>>         Tel : +32-10-472352 -- Mobile : +32-473-909930
>>
>>
>>
>>
>>
>>
> 
>     ----------------
>     Prof. Jean-Francois Remacle
>     Universite catholique de Louvain (UCL)
>     Tel : +32-10-472352 -- Mobile : +32-473-909930 
> 
> 
> 
> 
> 
> 
> 
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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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