[MOAB-dev] get uniquely owned vertices

[Nico Schlömer]

Hi everyone,

When reading a mesh in parallel, I would like to get the vertices such that
every vertex belong to exactly one process. When reading with
```
  moab::Range verts;
  ierr = mb->get_entities_by_dimension(0, 0, verts);
```
the vertices along the process interfaces will be shared, i.e., they appear
on two processes.

I used to believe the above does the right thing and I have to use get the
shared entities separately
```
  moab::Range shared;
  ierr = mcomm_->get_shared_entities(-1, shared, 0);
  all.merge(shared);
```
but it seems I'm on the wrong track.

Any hints?

Cheers,
Nico
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