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[Peter Brune <question152565@xxxxxxxxxxxxxxxxxxxxx>]

Question #152565 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/152565

Peter Brune proposed the following answer:
It's pretty easy to do this for any point on the mesh for general function
spaces using basis function evaluations if you know what cell your point
resides in (even in the mixed/vector case).  Right now I have it implemented
as a boundary condition, but I sort of agree that it really should look like
it's a coefficient if people are going to use it generally.

- Peter

On Tue, Apr 12, 2011 at 2:00 PM, Anders Logg <
question152565@xxxxxxxxxxxxxxxxxxxxx> wrote:

> Question #152565 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/152565
>
> Anders Logg proposed the following answer:
> On Tue, Apr 12, 2011 at 05:54:02PM -0000, Garth Wells wrote:
> > Question #152565 on DOLFIN changed:
> > https://answers.launchpad.net/dolfin/+question/152565
> >
> > Garth Wells proposed the following answer:
> > You can add the source term to the RHS vector. It would correspond to to
> > a Delta function at a node. The trick is to find the right node.
>
> It would be good though to be able to handle this without the need for
> setting the Delta function at a node (but at an arbitrary point).
>
> --
> Anders
>
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