[Dune-devel] idset.subId() only for codim=0?

[Aleksejs Fomins]

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Hey Jö,

Thanks for your advice.

In fact, the reason for this functionality is the correct orientation of basis. If one wishes to have a basis associated with an interior surface in a 3D mesh, it is essential that the orientation of the basis must be the same, when seen from the two elements sharing a face of that surface. This is implemented by enforcing the orientation of the basis with respect to globalId of the vertices of the underlying face.

I currently have sufficient connectivity implemented in Curvilinear Grid, and thus I will use EXPERIMENTAL_GRID_EXTENSIONS for this.

All the best,
Aleksejs

On 22.02.2016 12:27, Jö Fahlke wrote:
> Am Mon, 22. Feb 2016, 11:54:42 +0100 schrieb Aleksejs Fomins:
>> Date: Mon, 22 Feb 2016 11:54:42 +0100
>> From: Aleksejs Fomins <aleksejs.fomins at lspr.ch>
>> To: "dune-devel at dune-project.org" <dune-devel at dune-project.org>
>> Subject: [Dune-devel] idset.subId() only for codim=0?
> 
>> Can somebody please explain what is the motivation behind idset.subId(Entity, index, codim) in dune-grid being restricted to codim=0 entities?
>>
>> I was trying to find the Ids of the vertices of a face in 3D.
> 
> Well, I think you are the first one to request that feature.  And I think that
> if you require that functionality in general for all grids, most grids would
> have to store *a lot* more connectivity information than they are doing
> already to implement it.  So that may be the reason why this has never been
> part of the interface.
> 
> Regards,
> Jö.
> 
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