On Wed, 10 Nov 2010, Cody Permann wrote:

> Sorry I don't mean to spam but I thought of one other issue to consider with 
> changing
> around the API for the Periodic BC AMR level one constraint issue.  Right now 
> the
> PeriodicBoundaries object is held inside of DofMap but for topological 
> purposes,
> perhaps it doesn't belong there.  At the very least, I clearly need access to 
> it from the
> objects dealing with the Mesh.  If we pass in the PeriodicBoundaries object
> as a reference to the new topological_neighbor function then the callers will 
> need
> access to it only moving the problem "who should own it" problem.
>
> For now I created a pointer in the MeshRefinement object and an accessor in 
> DofMap to
> get a reference for the purpose of setting that pointer.  This doesn't seem 
> like the cleanest
> solution.  If you have some better design ideas let me know.

I thought about the same problem but shoved it to the back of my mind;
you're right to drag it out in the open.  PeriodicBoundaries was
originally deep in DofMap because I'd thought that that was the only
class which needed to use it.  I could definitely see an argument for,
say, attaching it to a MeshBase instead.

Other ideas/opinions are welcome.
---
Roy

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