[Dune] attaching data to intersections

[Jurgis Pods]

Hi Steffen,

this approach (using PDELab's IntersectionIndexSet) will not work on 
grids which do not support codim-1 entities, will it? Does this mean I 
have to use an IdSet in this case?

Jurgis


On 07.11.2012 22:21, Steffen Müthing wrote:
> Hi Marco,
>
> as long as your grid has a conforming macro grid (which is true for every Dune grid I know),
> you can always associate the data with the face belonging to the more-refined
> entity (the one with the higher level), or with the face belonging to the cell with
> the lower index (if the levels are the same). To get the index of that face, you can
> use the subIndex() method of the IndexSet with the cell and the value of indexInInside()
> or indexInOutside() from the intersection.
>
> In PDELab, there is an IntersectionIndexSet that does something like that. Perhaps you
> can simply use that, or you can use it as inspiration for your own implementation... ;-)
>
> Steffen
>
>
> Am 07.11.2012 um 18:03 schrieb Marco Cisternino:
>
>> Hi Duners,
>> I need to attach data to intersections. I would like to avoid redundance of data (using a mapper to elements and attaching a stl container to store values on its intersections) and time consumption to access data (using a stl map).
>> I wonder if something like a mapper is available for intersections. Choosing the right layout for a MCMG mapper would not work, I guess, on non conforming grid, doesn't it?
>> Thank you very much, again.
>>
>> Marco
>>
>>
>> -- 
>> Marco Cisternino
>> Optimad Engineering s.r.l.
>> www.optimad.it
>> marco.cisternino at optimad.it
>> +3901119719782
>>
>>
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> Steffen Müthing
> Universität Stuttgart
> Institut für Parallele und Verteilte Systeme
> Universitätsstr. 38
> 70569 Stuttgart
> Tel: +49 711 685 88429
> Fax: +49 711 685 88340
> Email: steffen.muething at ipvs.uni-stuttgart.de
>
>
>
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