Functionspace Restriction

On Mon, Dec 14, 2009 at 11:49:18PM -0000, <email address hidden> wrote:
> New question #94104 on DOLFIN:
> https://answers.launchpad.net/dolfin/+question/94104
>
> Hello,
>
> I hope this is the right list to ask this question. I am trying to restrict a function space in C++, but I get an error saying
>
> Error: FunctionSpace::attach is not working. Please fix the dof map builder.
>
> I am trying to restrict the function space using
>
> boost::shared_ptr<FunctionSpace> W = V.restriction(cells);
>
> Anyone help me figure out whats going wrong here?
>
> -Jehanzeb

Restrictions have been broken for a while after the work on
parallelization of DOLFIN in August.

This needs to be reimplemented. I don't have time for this now so it
will take a while if no one else is willing to fix it.

--
Anders

> Question #94104 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/94104
>
> Status: Open => Answered
>
> Anders Logg proposed the following answer:
> On Mon, Dec 14, 2009 at 11:49:18PM -0000, <email address hidden> wrote:
>> New question #94104 on DOLFIN:
>> https://answers.launchpad.net/dolfin/+question/94104
>>
>> Hello,
>>
>> I hope this is the right list to ask this question. I am trying to
>> restrict a function space in C++, but I get an error saying
>>
>> Error: FunctionSpace::attach is not working. Please fix the dof map
>> builder.
>>
>> I am trying to restrict the function space using
>>
>> boost::shared_ptr<FunctionSpace> W = V.restriction(cells);
>>
>> Anyone help me figure out whats going wrong here?
>>
>> -Jehanzeb
>
> Restrictions have been broken for a while after the work on
> parallelization of DOLFIN in August.
>
> This needs to be reimplemented. I don't have time for this now so it
> will take a while if no one else is willing to fix it.
>
> --
> Anders
>

I am sorry, but the implementation is not suited for parallel meshes. I am
not sure
how to fix it just now.

My best advice is to use some kind of penalty method to "remove" the extra
degrees
of freedom.

Kent

Kent

Kent <email address hidden> writes:

> Question #94104 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/94104
>
> Kent proposed the following answer:
>> Question #94104 on DOLFIN changed:
>> https://answers.launchpad.net/dolfin/+question/94104
>>
>> Status: Open => Answered
>>
>> Anders Logg proposed the following answer:
>> On Mon, Dec 14, 2009 at 11:49:18PM -0000, <email address hidden> wrote:
>>> New question #94104 on DOLFIN:
>>> https://answers.launchpad.net/dolfin/+question/94104
>>>
>>> Hello,
>>>
>>> I hope this is the right list to ask this question. I am trying to
>>> restrict a function space in C++, but I get an error saying
>>>
>>> Error: FunctionSpace::attach is not working. Please fix the dof map
>>> builder.
>>>
>>> I am trying to restrict the function space using
>>>
>>> boost::shared_ptr<FunctionSpace> W = V.restriction(cells);
>>>
>>> Anyone help me figure out whats going wrong here?
>>>
>>> -Jehanzeb
>>
>> Restrictions have been broken for a while after the work on
>> parallelization of DOLFIN in August.
>>
>> This needs to be reimplemented. I don't have time for this now so it
>> will take a while if no one else is willing to fix it.
>>
>> --
>> Anders
>>
>
> I am sorry, but the implementation is not suited for parallel meshes. I am
> not sure
> how to fix it just now.
>
> My best advice is to use some kind of penalty method to "remove" the extra
> degrees
> of freedom.
>
> Kent
>

I can have a look at it during the holidays...but I need to get bzr to
work first.

Niclas

Niclas Jansson wrote:
> Question #94104 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/94104
>
> Niclas Jansson proposed the following answer:
> Kent <email address hidden> writes:
>
>> Question #94104 on DOLFIN changed:
>> https://answers.launchpad.net/dolfin/+question/94104
>>
>> Kent proposed the following answer:
>>> Question #94104 on DOLFIN changed:
>>> https://answers.launchpad.net/dolfin/+question/94104
>>>
>>> Status: Open => Answered
>>>
>>> Anders Logg proposed the following answer:
>>> On Mon, Dec 14, 2009 at 11:49:18PM -0000, <email address hidden> wrote:
>>>> New question #94104 on DOLFIN:
>>>> https://answers.launchpad.net/dolfin/+question/94104
>>>>
>>>> Hello,
>>>>
>>>> I hope this is the right list to ask this question. I am trying to
>>>> restrict a function space in C++, but I get an error saying
>>>>
>>>> Error: FunctionSpace::attach is not working. Please fix the dof map
>>>> builder.
>>>>
>>>> I am trying to restrict the function space using
>>>>
>>>> boost::shared_ptr<FunctionSpace> W = V.restriction(cells);
>>>>
>>>> Anyone help me figure out whats going wrong here?
>>>>
>>>> -Jehanzeb
>>> Restrictions have been broken for a while after the work on
>>> parallelization of DOLFIN in August.
>>>
>>> This needs to be reimplemented. I don't have time for this now so it
>>> will take a while if no one else is willing to fix it.
>>>
>>> --
>>> Anders
>>>
>> I am sorry, but the implementation is not suited for parallel meshes. I am
>> not sure
>> how to fix it just now.
>>
>> My best advice is to use some kind of penalty method to "remove" the extra
>> degrees
>> of freedom.
>>
>> Kent
>>
>
> I can have a look at it during the holidays...but I need to get bzr to
> work first.
>

This needs a good re-think. The original implementation was ad-hoc.

Garth

> Niclas
>

On Tue, Dec 15, 2009 at 06:45:27PM -0000, Niclas Jansson wrote:
> Question #94104 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/94104
>
> Niclas Jansson proposed the following answer:
> Kent <email address hidden> writes:
>
> > Question #94104 on DOLFIN changed:
> > https://answers.launchpad.net/dolfin/+question/94104
> >
> > Kent proposed the following answer:
> >> Question #94104 on DOLFIN changed:
> >> https://answers.launchpad.net/dolfin/+question/94104
> >>
> >> Status: Open => Answered
> >>
> >> Anders Logg proposed the following answer:
> >> On Mon, Dec 14, 2009 at 11:49:18PM -0000, <email address hidden> wrote:
> >>> New question #94104 on DOLFIN:
> >>> https://answers.launchpad.net/dolfin/+question/94104
> >>>
> >>> Hello,
> >>>
> >>> I hope this is the right list to ask this question. I am trying to
> >>> restrict a function space in C++, but I get an error saying
> >>>
> >>> Error: FunctionSpace::attach is not working. Please fix the dof map
> >>> builder.
> >>>
> >>> I am trying to restrict the function space using
> >>>
> >>> boost::shared_ptr<FunctionSpace> W = V.restriction(cells);
> >>>
> >>> Anyone help me figure out whats going wrong here?
> >>>
> >>> -Jehanzeb
> >>
> >> Restrictions have been broken for a while after the work on
> >> parallelization of DOLFIN in August.
> >>
> >> This needs to be reimplemented. I don't have time for this now so it
> >> will take a while if no one else is willing to fix it.
> >>
> >>
> >
> > I am sorry, but the implementation is not suited for parallel meshes. I am
> > not sure
> > how to fix it just now.
> >
> > My best advice is to use some kind of penalty method to "remove" the extra
> > degrees
> > of freedom.
> >
> > Kent
> >
>
> I can have a look at it during the holidays...but I need to get bzr to
> work first.

Ah, you are running BSD...

Did you manage to compile ls yet ;-)

--
Anders