[Gmsh] ERROR: Edge x-y multiple times in surface mesh

[Christophe Geuzaine]

michal.kasparek at tul.cz wrote:
> Hello
> 
> I am solving conversion STL to GEO (I have some surface stl models of 
> vertebra or
> so), so GMSH could generate 3D mesh from my model (dont know of a better 
> way then
> this).
> 
> I have written a conversion algorithm, but when i try to gnerate the 
> mesh, GMSH
> crashes.
> 
> Im new to this stuff and I couldnt find answer...
> 
> I use GMSH 2-2-0. STL/GEO in attachement.

You don't need to convert the .stl file into a .geo file to do the 
meshing. You can simply merge the .stl file and define the volume.

For example "yourfile.geo" could contain

//////////
Merge "obratel_2_blend_2_ascii.stl";
Surface Loop(1) = 1;
Volume(1) = 1;
//////////

This of course assumes that the surface mesh in the .stl file is closed, 
which is not the case in the file you sent: cf. attached picture.



> 
> Thanks a lot for answers
> 
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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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