[Gmsh] Bug with Frontal and Delaunay 2D mesh algorithms ( A little more insight)

[Christophe Geuzaine]

CEM ALBUKREK wrote:
> By the way what I mean by non-uniform orientation is that neighboring 2D 
> facet normals point in opposite directions in a random fashion. This 
> behaviour is observed in GMSH version gmsh-2.2.1. After correcting the 
> 2D mesh normals using an external meshing software tool and bringing 
> back the STL file in, the GMSH volume mesher works perfectly fine.

Hi Cem - Yes, it's a known bug (recent versions actually display a 
warning dialog about it). We're working on a fix.


> 
> On Thu, Oct 16, 2008 at 5:17 PM, CEM ALBUKREK <calbukrek at gmail.com 
> <mailto:calbukrek at gmail.com>> wrote:
> 
>     Dear Christophe,
> 
>     I have observed a minor bug associated with non-uniform orientation
>     of surface facets generated using Frontal and Delaunay 2D mesh
>     algorithms. The discrepancy causes the 3D Netgen volume mesh
>     generation to fail.
> 
>     Best,
> 
>     Cem
> 
> 
> 
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> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine