g_hash_table_foreach(mdb->materials, &put_mat_in_graph, &propmap);
//graph_add_linear_connectors(propmap.graph);
g_hash_table_foreach(mdb->materials, &link_materials, &propmap);
g_hash_table_foreach(mdb->materials, &put_mat_in_graph, &propmap);
//graph_add_linear_connectors(propmap.graph);
g_hash_table_foreach(mdb->materials, &link_materials, &propmap);