[Dune] Creating an ALUCubeGrid from a DGF file

[Sven Marnach]

Andreas Dedner schrieb am Mo, 14. Jun 2010, um 14:10:49 +0200:
> If the ordering of the local vertices of the cube elements does not
> follow the Dune reference element then the mapping between the local
> numbering used and the dune reference cube has to be prescribed by a
> line starting with the keyword map followed by dimworld^2 values
> describing the mapping between the local vertex numbers.

There are three points I do not understand:

 1. What do the dimworld^2 "values" (i.e. 9 in my case) describe?  Are
    they integers or real numbers?

 2. Is this the mapping from the local numbering in your file to the
    DUNE numbering or the other way around?  In the example you gave
    the two possibilities would be the same, because the permutation
    is an involution.  But in other cases I just wouldn't know.

 3. Is a map line also possible for a BoundarySegment block? The
    documentation does not say so, but the parser does not give an
    error as well.

To be honest, I would know the answer to the first question :)

Greetings,
    Sven