classification in simmetrix mesh converter about omega_h

[joshia5]

@cwsmith , setting the "class_dim" and "class_id" tags directly will only work for elements and vertices, not for other entities because they are created using omegah build functions:

omega_h/src/Omega_h_meshsim.cpp

Line 133 in 1235d6f

build_from_elems_and_coords(

I think a thorough fix would be to create omegah mesh entities while preserving mapping of ids with simmetrix mesh ents and then we can set the tags directly. This build process was implemented for mixed mesh here:

omega_h/src/Omega_h_meshsim.cpp

Line 111 in d96f537

mesh->set_ents(Topo_type::edge, Topo_type::vertex, Adj(ev2v));

although iirc specific omegah functions for mixed mesh building were created for that.

[cwsmith]

This is resolved with #15 .