dolfin team mailing list archive

["Johan Hoffman" <jhoffman@xxxxxxxxxx>]

>
> Johan Hoffman wrote:
>> About the global dof numbering for the different components in a
>> function
>> defined by a mixed element: I get the impression that we use a different
>> ordering for the mixed dofs than for the dofs of a regular vector valued
>> function?
>>
>
> I don't think so. For both mixed and vector elements, dofs at the same
> node do not lie next to each other in the dof mapping.
>
> It will be possible to choose the dof ordering soon when the new
> assembly is  up and running. There is already a new class DofMap which
> will handle this.
>
> Garth

Ok, thanks, so it would be "block-ordering" in both. Then our problem is
probably related to something else...

/Johan




>
>
>
>> I guess the natural way is to order the global dofs such that all
>> components for a given node (e.g. a vertex for Lagrange elements) lies
>> together, which I think gives the better block structure? It appears
>> that
>> the mixed dofs are ordered differently?
>>
>> Maybe I'm wrong? But if not, we should take care of this as soon as
>> possible, since it is very confusing.
>>
>> /Johan
>>
>>
>>
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