[Gmsh] How to set MSH file format to 2

[Andress]

Christophe ,
Many thanks!  I suppose I should read all the FAQ :-(
Kind regards,
Randal

-----Original Message----- 
From: Christophe Geuzaine
Sent: Tuesday, March 24, 2020 2:03 AM
To: Andress
Cc: Gmsh
Subject: Re: [Gmsh] How to set MSH file format to 2



> On 24 Mar 2020, at 05:33, Andress <randalandress1507 at comcast.net> wrote:
>
> Is it possible to set MSH file format to 2 as an option for the later 
> versions (4.5.4) of Gmsh, so that when the .msh is saved from the GUI, it 
> will produce MSH2 instead of MSH4 ascii files?
>

Sure. With the GUI, select File->Export, enter a .msh filename, then select 
the format you want in the dropdown menu. Then use File->Save Options as 
Default. This will save your options in ~/.gmsh-options.

See also FAQ 17 in 
http://gmsh.info/doc/texinfo/gmsh.html#Mesh-module-questions:

```
How can I save a mesh file with a given (e.g. older) MSH file format 
version?
• In the GUI: open ‘File->Export’, enter your filename.msh and then pick the 
version in the dropdown menu.
• On the command line: use the -format option (e.g. gmsh file.geo -format 
msh2 -2).
• In a .geo script: add the line Mesh.MshFileVersion = x.y; for any version 
number x.y. You can also save this in your default options.
• In the API: gmsh::option::setNumber("Mesh.MshFileVersion", x.y).
As an alternative method, you can also not specify the format explicitly, 
and just choose a filename with the .msh2 or .msh4 extension.
```

Christophe


> Kind regards,
> Randal
>
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—
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine