[Dune] boundaryId ?

[Oliver Sander]

Hi Benedikt,
the boundaryId method was an experimental grid extension, added to suit the
needs of the DGF reader, but it was never clearly stated what it does.
In particular, you will notice that it only works with ALUGrid (and possibly
with Alberta), but definitely not with the other grid managers.  To clearly
mark it as 'experimental' it is now hidden behind the DUNE_GRID_EXPERIMENTAL_GRID_EXTENSIONS
macro.  If you want to continue using boundaryId you'll have to set that flag.

On the other hand, boundarySegmentIndex implements an index in the Dune sense
(i.e., a consecutive, zero-starting set of integers) for the boundary segments
of the macro grid.  Following the Dune philosophy, if you want to attach data
to these segments (like, e.g., an integer giving the type of boundary conditions),
than that is external data and needs to be done outside of the grid interface.

Note that there are problems with boundarySegmentIndex when working on parallel
grids.  A discussion about this was scheduled at the last dev meeting, but
unfortunately we ran out of time before getting to this point.

Best,
Oliver

Am 19.10.2013 10:52, schrieb Bernd Flemisch:
> Hi Benedikt, 
> 
> please have a look here:
> http://lists.dune-project.org/pipermail/dune/2013-October/012490.html
> especially at the second answer.
> 
> To my understanding, boundarySegmentIndex is a different concept:
> http://www.dune-project.org/doc/doxygen/dune-grid-html/class_dune_1_1_intersection.html#a576b6611af20e6676706a68f33fef09e
> In particular, I think that you can't set a particular index in the DGF file. 
> 
> Kind regards
> Bernd 
> 
> On Fri, 18 Oct 2013 23:24:34 +0200
>  Benedikt Oswald <benedikt.oswald at lspr.ch> wrote:
>> Dear Dune,
>>
>> I have come to realize that the boundaryId method in the IntersectionIterator has obviously disappeared
>> by default. Still, I need to access the id's of a boundary as they are stored in the DGF file.
>>
>> My question: is the new method boundarySegmentIndex() in the grid api equivalent ?
>>
>> Second, is this also available for AluSimplexGrid ?
>>
>> There is no documentation for AluGridSimplex on the dune-project site ?
>>
>> Thanks for some hints and greetings, Benedikt
>>
>>
>>
>>
>> ----------------------------------------------------------------------------------------------------------------------------------------------
>> Dr. sc. techn. Benedikt Oswald - first engineer - LSPR AG - phone - +41 76 380 91 33
>> Technoparkstrasse 1, CH-8005 Zürich, benedikt.oswald at lspr.ch
>> "Passion is required for any great work, and for the Revolution passion and audacity are required in big doses." 
>> Ernesto 'Che' Guevara, Letter to his parents.
>> ----------------------------------------------------------------------------------------------------------------------------------------------
>>
>>
>>
>>
> 
> _______________________________________________________________
> 
>     !!!! CMWR 2014: 10th - 13th June 2014 in Stuttgart !!!!
>                   Please visit www.cmwr14.de
> _______________________________________________________________
> 
> Bernd Flemisch                         phone: +49 711 685 69162
> IWS, Universitaet Stuttgart              fax: +49 711 685 67020
> Pfaffenwaldring 61            email: bernd at iws.uni-stuttgart.de
> D-70569 Stuttgart            url: www.hydrosys.uni-stuttgart.de
> _______________________________________________________________
> 
> _______________________________________________
> Dune mailing list
> Dune at dune-project.org
> http://lists.dune-project.org/mailman/listinfo/dune
> 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 551 bytes
Desc: OpenPGP digital signature
URL: <https://lists.dune-project.org/pipermail/dune/attachments/20131019/28728ba1/attachment.sig>