On Wed, 15 Sep 2010, Tim Kroeger wrote:
> On Tue, 14 Sep 2010, Roy Stogner wrote:
>
>> Are you looking at just all elements which have a shape function
>> associated with this DoF, or are you also including every element
>> which supports an associated basis function? In the former case it's
>> enough to find elements which point to this DoF's node; in the latter
>> case in an adapted mesh you've also got to check for other DoFs which
>> are constrained by this one.
>
> Good point, I didn't think of this. I'll try to sort things in my brain and
> see which of these is what I want. I see that in the latter case, I can use
> DofMap::constrain_nothing() to get the correct dof list, right?
I don't think so. Suppose there's one hanging node where DoF 10 is
constrained in terms of DoFs 3 and 4, and another where DoF 15 is
constrained in terms of DoFs 5 and 3. DoFMap::constrain_nothing({10})
will give you {10,3,4}, but what you'd want to be able to do is go from
{3} to {3,10,15}. I don't think there's anything in the library that
does that right now.
---
Roy
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