According to your first reply, I extracted the points of the boundaries and I noted that, as you said, the points are ordered in a clockwise sens(Freefem only reads in a counterclockwise sens). So I created a Matlab script that reads the points in .xyz format and creates a .geo file with the points and lines:
When I imported the points into a matrix, I reversed the order using the comand “flip”. Then I defined the points and lines according to the gmsh nomenclature, and when I created the mesh and exported in a .mesh format, FreeFem reads it without problems. Thanks for your reply, it helped me to find another way to solve the problem. I attach the .m script, the .xyz points and the generated .geo file. Best Regards, Jacob ________________________________ De: G. D. McBain <[email protected]> Enviado: Monday, May 20, 2019 3:31:21 AM Para: Jacob Abdelfatah Ndioubnane Cc: gmsh Asunto: RE: Problem with Reading the mesh generated into freefem. 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...
Costa1.xyz
Description: Costa1.xyz
datatogeosea.m
Description: datatogeosea.m
dominio.geo
Description: dominio.geo
Roca.xyz
Description: Roca.xyz
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