[Gmsh] visualization problem ?

Christophe Geuzaine cgeuzaine at ulg.ac.be
Thu Feb 11 13:39:58 CET 2016

> On 07 Feb 2016, at 19:25, walter steffe <walter.steffe at alice.it> wrote:
> The attached file is a mesh generated by Gmsh library linked to EmCAD.
> The mesh associated with Elementary Entity Surface number 4 (and also e
> few other faces) is incomplete.
> This surface mesh should copied from an other surface. EmCAD makes use
> of GFace::setMeshMaster to enforce this condition. The affine
> transformation relating the two faces is a rotation about the cylinder
> axis.
> It is quite strange that the original face is properly meshed while the
> copy is not. It is even more strange that other 18 copies of the
> same original face (with different rotation angles) are properly meshed
> while only 3 faces are incomplete.
> I do not understand well the mesh file format but I think that the slave
> face meshes should just refer to the master face and the related
> transformation.
> So I do not understand why there is such big difference between master
> and slave meshes. Is it a visualization problem ?.

I don't think so: the actual mesh is indeed incomplete. The problem is most probably in the generation of the slave mesh. Quite a bit of work has been going on on periodic meshes in recent releases: I would try with the latest stable release to see if the problem persists.

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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 

Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be
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