[Gmsh] Phyical entity as element tag in command line bdf export

[Bert De Coensel]

Dear Gmsh users,

We are using the the BDF export functionality of Gmsh. When saving a 
mesh in BDF file format through the gui, the BDF options window is 
shown, where one can choose "physical entity" for "element tag", 
which is what we need. However, we would also like to use Gmsh in 
command line mode, e.g. using the command "gmsh.exe test.geo -3 -o 
test.bdf", but elementary entities are then saved by default. Are 
there any command line options to change this behavior? Otherwise the 
command line interface is not very useful for us.

Best regards,
Bert De Coensel