[Gmsh] Problem with Reading the mesh generated into freefem.

G. D. McBain gdmcbain at protonmail.com
Mon May 20 04:31:21 CEST 2019

> I checked also that when the program generates the mesh it displays a warning error due to It can’t orient the normal of the Surface.

Yes, on running 'gmsh -2 Dominio.geo', I see this too:

    Warning : Could not orient normal of surface 1

I'm not immediately sure why though...  I continue to suspect that this warning is associated with the error from FreeFEM about triangular elements having negative areas, but I haven't been able to work out what the problem with Dominio.brep is, i.e. why Gmsh can't orient the Plane Surface.

I even get the same warning from Gmsh when trying to make a simple Plane Surface from either of the two Curve Loops separately.  That does seem odd to me since the second, which looks like an island (or is it a lake) is simple enough to be inspected manually in the Gmsh GUI and it looks fine.

Sorry, I'm not sure what to suggest from here...
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