[Gmsh] Writing node-data from ".geo" file

[Aditya Kommajosula]

Hello,

Thank you for your prompt responses. I must admit I had narrowed down my
options to either using physical groups, or find a way to use 'NodeData',
but the former seems to be popular and intuitive. I will go ahead and
implement that to see if it serves the needful.

Thanks again!

Regards,
Aditya K

On Tue, Jun 20, 2017 at 2:04 AM, DILASSER Guillaume <
Guillaume.DILASSER at cea.fr> wrote:

> Hi Aditya,
>
>
>
> The enclosed file shows how you can generate post-processing datasets
> directly from within Gmsh and save them into a .msh file. Basically, it
> uses the following steps :
>
> ·         Create a geometry and mesh it.
>
> ·         Generate a new post processing view on that geometry,
> containing the values to assign to each node. Here for the example I use
> the MathEval Plugin to compute the distance from each node to the origin.
> Here you will probably have to dig into Gmsh Plugins to find which are
> useful in your case.
>
> ·         Save the post-processing view within a mesh-oriented .pos file
> (renamed with a .msh extension).
>
> You can run this example from the command line with *gmsh example1.geo -2*
> (*-0* should also work). In any case, it should output a NodeData.msh
> file that contains the meshed geometry along with a node-based
> post-processing view.
>
>
>
> However, on a more fundamental level, if you aim is simply to “mark”
> specific nodes of the mesh for whatever reason, why not defining Physical
> Entities
> <http://gmsh.info/doc/texinfo/gmsh.html#Elementary-vs-physical-entities>
> instead of using a post-processing view ? That would be much easier…
>
>
>
> Hoping this helps, let me know if your still have questions.
>
>
>
> Sincerely Yours,
>
>
>
> Guillaume DILASSER
>
> Doctorant SACM / LEAS
>
> CEA - Centre de Saclay - Bât.123 - PC 319c
>
> 91191 Gif sur Yvette Cedex - France -
>
>
>
> guillaume.dilasser at cea.fr
>
>
>
>
>
>
>
> *De :* gmsh [mailto:gmsh-bounces at ace20.montefiore.ulg.ac.be] *De la part
> de* Aditya Kommajosula
> *Envoyé :* lundi 19 juin 2017 23:08
> *À :* gmsh at onelab.info
> *Objet :* [Gmsh] Writing node-data from ".geo" file
>
>
>
> Hello,
>
>
>
> I was wondering if it is possible to write node-data to a ".msh" file from
> within the ".geo" file. All the examples from the documentation seem to
> explain the format of a ".msh" file containing node-data, but I would like
> gmsh to write out node-data (if possible) to the ".msh" file it generates
> (I need this to place "markers" on specific boundary nodes)
>
>
>
> Thank you!
>
>
>
> Regards
>



-- 
*Aditya Kommajosula*
*Graduate Research Assistant, Lab of Mechanics*
*Mechanical Engineering, Iowa State University*
*(adityak at iastate.edu <k.aditya.subramanyam at gmail.com>)*
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