[Gmsh] Create different areas in a mesh.

[jean pierre aubry]

hello

that is very simple 
"Physical" for Point Line etc are done for that
these entities are more commonly known as groups
this is well described in the doc
example

Physical Point ("fixadm") = {5301:5304};
Physical Line ("fixvhaut") = {3026:3029};
Physical Line ("fixvlat") = {5020, 5028, 5032, 5037};

-- 
jean pierre aubry
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