[Dune] local vertex indices

[Lars Lubkoll]

Dear developers of DUNE,

I am using Dune 2.2.1 with UGGrid and have a question regarding the 
connection between local vertex indices of an intersection and one of 
its neighbouring tetrahedra.
Is there a way to get the vertex indices wrt. the tetrahedron from 
indices wrt. the intersection?
For me the problem seems to be how to get a codim<1>-entity of a cell. 
Then I would use the subEntity-method of GenericReferenceElement to map 
the indices. But it seems as if codim<1>-entities do not exist.

I attached a small example in case it is needed for clarity. This 
example obviously does not work as desired due to the differences 
between intersections and codim-1-entities.

Kind regards


Lars Lubkoll
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