Re: [dealii-developers] Upcoming p4est release

[Matthias Maier]

On Thu, Sep  1, 2016, at 10:03 CDT, carsten.burste...@gmail.com wrote:

> Hi everybody,
>
> I'm about to bump the p4est master branch significantly.  Could some of you 
> please check whether the current develop branch on github works with deal.ii?
>
> /Carsten

Will do, ETA ~24h.

I will also review the debian specific patches (only tiny modifications
for the build system and to comply with debian policies) whether
something is worth upstreaming. If yes, I'll make a pull request on
github.

Best,
Matthias

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[dealii-developers] Upcoming p4est release

[carsten . burstedde]

Hi everybody,

I'm about to bump the p4est master branch significantly.  Could some of you 
please check whether the current develop branch on github works with deal.ii?

/Carsten

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Re: [deal.II] Re: assembling individual block step 43

['Franck Kalala' via deal.II User Group]

True,

dealii documentation is huge!,
One can lost easily

Best

2016-08-29 16:56 GMT+02:00 Daniel Arndt :

>
>> There actually *is* a function that takes two DoFHandler objects, but it
>> doesn't take a constraint matrix or the last boolean argument.
>>
> [...]
>
>> You can of course see what variants of the make_sparsity_pattern function
>> there are by looking here:
>>https://www.dealii.org/8.4.1/doxygen/deal.II/namespaceDoFTools.html
>
> Yes, I must have overlooked that... Well hidden from the other
> make_sparsity_pattern_functions.
>
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Re: [deal.II] Re: assembling individual block step 43

['Franck Kalala' via deal.II User Group]

Many Thanks W

Best

2016-08-29 16:35 GMT+02:00 Wolfgang Bangerth :

>
> DoFTools::make_sparsity_pattern (saturation_dof_handler,
>> darcy_dof_handler, dsp,
>> saturation_constraints, false);
>> ssemble_matrix_H.reinit(dsp);
>>
>>
>>
>> dealii is complaining and is saying
>>
>> /home/franckm/apps/candi/deal.II-toolchain/deal.II-v8.4.0/in
>> clude/deal.II/dofs/dof_tools.h:563:3:
>> note: template void
>> dealii::DoFTools::make_sparsity_pattern(const DoFHandlerType&, const
>> DoFHandlerType&, SparsityPatternType&)
>>make_sparsity_pattern (const DoFHandlerType _row,
>>^
>> /home/franckm/apps/candi/deal.II-toolchain/deal.II-v8.4.0/in
>> clude/deal.II/dofs/dof_tools.h:563:3:
>> note:   template argument deduction/substitution failed:
>> /home/franckm/candi-examples/step-43b/step-43b.cc:918:68: note:
>> candidate expects 3 arguments, 5 provided
>>saturation_constraints, false);
>> ^
>> make[3]: *** [CMakeFiles/step-43b.dir/step-43b.cc.o] Error 1
>>
>> The error is not surprising as there isn't a variant of
>> DoFTools::make_sparsity_pattern that takes two DoFHandlers.
>>
>
> There actually *is* a function that takes two DoFHandler objects, but it
> doesn't take a constraint matrix or the last boolean argument. (The reason
> is that if you consider different row and column spaces suggested by the
> two DoFHandlers, you would also have to consider different constraints on
> rows and columns; so, if that were implemented, there would need to be a
> function that takes *two* ConstraintMatrix objects; but that isn't
> implemented -- the function that is there assumes no constraints on either
> of the DoFs that form the row and column spaces, and leaves it to you to
> later eliminate the constraints you may have through other means.)
>
> You can of course see what variants of the make_sparsity_pattern function
> there are by looking here:
>   https://www.dealii.org/8.4.1/doxygen/deal.II/namespaceDoFTools.html
>
> Best
>  W.
>
> --
> 
> Wolfgang Bangerth  email: bange...@colostate.edu
>www: http://www.math.colostate.edu/~bangerth/
>
>
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[deal.II] Re: nearest neighbor

[Jean-Paul Pelteret]

Hi Joel,

Do you mean the index to a vertex? And by nearest, do you mean the vertex 
that shares the shortest common edge with the specified vertex? If so, then 
no. But it shouldn't be hard to write such a function. You would need to 
find all cells that share the initial vertex (I believe this is implemented 
),
 
then from that find all edges that share this vertex and simply compute the 
edge lengths and sort/filter accordingly. If you really need the DoFs 
associated with this index, then you can determine them at this point.

Regards,
J-P

On Thursday, September 1, 2016 at 4:05:39 PM UTC+2, Joel Davidsson wrote:
>
> Dear all,
>
> If I have the index to a dof, is there any easy way I can get indexes to 
> the nearest neighbor?
>
> Thanks,
>
> Joel
>

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[deal.II] nearest neighbor

[Joel Davidsson]

Dear all,

If I have the index to a dof, is there any easy way I can get indexes to 
the nearest neighbor?

Thanks,

Joel

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