[Gmsh] save surface normals

[Umut Tabak]

Aron Wahlberg wrote:
> I don't really know, but, maybe you could access them if you save your surface mesh as .stl. In the stl-file you have all the normals.
>
> Hope this can help you, but I also hope there is an easier way!
>
> Good Luck!
>   
Hi Aron,

I did not know that ,in stl files, the normals of the surfaces were also 
saved, there is a subtle point that the mesh should be triangulated as 
far as I can read from the wikipedia...

Thanks.
Umut