[Gmsh] 1D mesh from .igs file

[Christophe Geuzaine]

Olivier Pierard wrote:
> Dear all,
> 
> Please find in attachment a very simple 1D .igs file (which is a not 
> closed curve).  When I open it in Gmsh, it tries to close the curve so 
> that the mesh is far from what I expect.  Why is it behaving so and is 
> there any way to avoid it ?
> 

Disabling OpenCascade CAD healing for small edges seems to fix the
problem: use "Geometry.OCCFixSmallEdges=0;" in a script, or
"Tools->Geometry->General->Remove small edges..." in the GUI.

PS: if possible use STEP files instead of IGES. The geometrical
tolerances required by IGES files are an unending source of problems.



> Thanks for any hint,
> 
> Olivier Pierard
> 
> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine