[Dune] How to obtain an EntityPointer from an Entity ?

[Jö Fahlke]

Am Tue, 25. Jan 2011, 15:39:35 +0100 schrieb Benedikt Oswald:
> probably a silly question, but how do I create an EntityPointer from an Entity  ?
> 
> 
> defining
> 
> typedef typename Grid::template Codim<Grid::dimension-3>::EntityPointer EntityPointerElement;
> 
> 
> and then doing something like:
> 
> EntityPointerElement entityPointer(entity);
> 
> where entity is of type Entity, as in the Dune::CommDataHandleIF gather and scatter functions
> won't work ?

AFAICT that should work.  The Entity must be of the same codimension as the
EntityPointer, of course (Grid::dimension-3 in your case).

I'm not sure what CommDataHandleIF has got to do with it.  If you're trying to
write a CommDataHandle, be aware that gather() and scatter() are instanciated
for all codimensions supported by the grid.  Returning false from contains()
will inhibit the call to gather() and scatter(), but not their instantiation,
since the returned boolean value is not static.

Bye,
Jö.

-- 
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