[Gmsh] information

David Colignon David.Colignon at ulg.ac.be
Fri Apr 16 07:36:14 CEST 2010

Hi Donato,

if you load an iges geometry in Gmsh and then save it as a .geo Gmsh geometry file, only points, lines and plane 
surfaces will be saved, because nurbs surfaces are not implemented in the native Gmsh language.



David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Institut Montefiore B28
Université de Liège
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
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On 16/04/10 0:51, Geordie McBain wrote:
> 2010/4/15 donato.stante at tiscali.it<donato.stante at tiscali.it>:
>> Hello, I use File/Merge from menu but when I save the Gmsh geometry I
>> have same problem with the mesh because not all surfaces are created.
>> Thanks for the reply.
>> Can you help me? Can I send the file?
> Hello.  I recommend you send it to the Gmsh list, as I've never
> actually created a Gmsh geometry or mesh from IGES or STEP myself,
> I've only seen others do it; I do know it's possible though, as I've
> seen the resulting three-dimensional meshes successfully used in
> FreeFem++ finite element calculations.
> I sounds as if your original IGES geometry is deficient.  Can you
> define the missing geometrical entities in Gmsh based on whatever it
> is that the IGES does provide?
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