[Gmsh] bug in bdf export?

Christophe Geuzaine cgeuzaine at ulg.ac.be
Fri Sep 21 17:17:43 CEST 2007

Hi Claus - Indeed: it looks like on your machine Gmsh wrote "E-00"
instead of "E-04" in the BDF file (if I fix the 4 occurrences in the 
file by hand the mesh looks OK).

Here's something strange: on my machine if I open the .msh file and
re-save it as BDF, everything is fine.

Maybe the bug depends on the machine/operating system? (I'm on Mac; 
looking at the screenshots you seem to be on Windows.) We use 
"sprintf(str, "%.2E", val);" to print the numbers in "small field"
format, since they must take exactly 8 characters. Maybe sprintf works 
slightly differently on Windows?

Do you observe the same problem if you choose the "long field" BDF format?

Thanks for the report!


cLAUS wEYAND wrote:
> I use gmsh to visualize finite element structures of bevel gears. The 
> gmsh file is generated as a .msh type 2 format file (attached file 
> tooth3dg.msh, screen shot "gear.jpg"). The mesh looks good after opening 
> the file with gmsh version 2.0.8. I exported the mesh using the Save as 
> menu using the bdf filter to a file labeled gear.bdf. After opening the 
> file gear.bdf with gmsh a few points of the FE mesh are out of place 
> (see screen shot "gear saved as bdf and opened with gmsh.jpg").
> Thanks for your help.
> Claus
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science