dolfin team mailing list archive

["Garth N. Wells" <gnw20@xxxxxxxxx>]

On 12/03/11 17:20, Marie E. Rognes wrote:
> On 03/12/2011 06:02 PM, Garth N. Wells wrote:
>>
>>
>> On 12/03/11 09:41, Marie E. Rognes wrote:
>>> On 03/12/2011 10:03 AM, Anders Logg wrote:
>>>> Nice! Is it working?
>>>
>>> Yes.
>>>
>>> As in, the logic is in place. The technicalities are not. Same for facet
>>> functions.
>>>
>>> Is it ok to make MeshFunction Hierarchical, or are there some template
>>> issues that one should be aware of?
>>>
>>
>> Sounds a bit complicated to me - would it be better to associate
>> relevant MeshFunctions with a Mesh, and take care of the hierarchy that
>> way (since there is a hierarchy of meshes)?
> 
> I was aiming for consistency. The other classes that depend on a mesh
> and need updating after mesh refinement are dealt with using Hierarchical.
> 

Consistency in complication? ;)

Along the lines a simplicity, and I don't like the circular nature of
making MeshFunctions hierarchical. A mesh is hierarchical, and
hierarchical a MeshFunction stores a pointer to a  hierarchical mesh.

> But following up on your suggestion: So, say we get a couple of forms
> with attached mesh functions. Instead of transferring the refined mesh
> functions to the refined forms, one could associate the refined mesh
> functions with the refined mesh, and by the "override" order specified
> by the Assembler, these would be applied to the refined forms. However,
> there can be different mesh functions (for instance different
> exterior_facet_domains) attached to the different forms, and so storing
> these with the mesh using single named mesh functions would not be
> sufficient. Bottomline, I don't quite see how that would work without
> getting "creative".
> 

I only plead for simplicity, and avoiding a viral design. The details
are up to you ;).

Garth

> -- 
> Marie
> 
> 
>>
>> Garth
>>
>>> I'll merge with main _later_ today, sort out changes wrt
>>> shared_ptrs/MeshFunctions and any other issues, and then continue.
>>>
>>> -- 
>>> Marie
>>>
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> 
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