I have some doubts on the correct use of GMSH and Freefem for 3D meshes.
(1) I would like to understand what is the difference between :
mesh3 Th = gmshload3(“maillage.msh”);
mesh3 Th = readmesh3(“maillage.mesh”);
(2) As I read on an article of 2018, Freefem can’t read *.msh and only *.mesh?
But with correct use of Physical Volume or Surface it seems to me that *.msh work. So, what’s true?
(3) Another information saw on a forum claims that we should take care of format following :
// Select older mesh version, for compatibility of FF++
Mesh.MshFileVersion = 2.2;
(4) And finally on this link : https://www.um.es/freefem/ff++/pmwiki.php?n=Main.GMSH3D
mesh3 Th1 = gmshload3(“essai.msh”);
mesh3 Th = tetg(Th1,switch=“pqaAAYYQ”);
as I read that the mesh read from gmsh is not correct for freefem and we should transform by the command tetg etc…
For the two last commands I have an error.
So, I would be happy to understand and follow the best way to use GMSH and Freefem for 3D meshes.
Thanks in advance.