[Gmsh] Problem with Reading the mesh generated into freefem.

[Jacob Abdelfatah Ndioubnane]

Thank you Cristophe. It looks wonderful!

I generated the mesh and effectively now is readable by freefem.

Sometimes ,It is very tricky to handle 2d meshes in gmsh, and now with this methodology I have a way to work with 2d geometries in a more straight way.

Best regards
Jacob


________________________________
De: Christophe Geuzaine <cgeuzaine at uliege.be>
Enviado: Monday, May 20, 2019 6:24:48 AM
Para: G. D. McBain
Cc: Jacob Abdelfatah Ndioubnane; gmsh
Asunto: Re: [Gmsh] Problem with Reading the mesh generated into freefem.


Here's a modified file that fixes the orientation (the original file mixes OpenCASACDE and the built-in kernel) and defines a nicer mesh size field.

Christophe

[cid:13f54fe1-f29a-4ac2-8de6-3dc79a8473a2 at eurprd09.prod.outlook.com]



> On 20 May 2019, at 04:31, G. D. McBain <gdmcbain at protonmail.com> wrote:
>
>
>> I checked also that when the program generates the mesh it displays a warning error due to It can’t orient the normal of the Surface.
>>
> Yes, on running 'gmsh -2 Dominio.geo', I see this too:
>
>     Warning : Could not orient normal of surface 1
>
> I'm not immediately sure why though...  I continue to suspect that this warning is associated with the error from FreeFEM about triangular elements having negative areas, but I haven't been able to work out what the problem with Dominio.brep is, i.e. why Gmsh can't orient the Plane Surface.
>
> I even get the same warning from Gmsh when trying to make a simple Plane Surface from either of the two Curve Loops separately.  That does seem odd to me since the second, which looks like an island (or is it a lake) is simple enough to be inspected manually in the Gmsh GUI and it looks fine.
>
> Sorry, I'm not sure what to suggest from here...
>
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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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