[petsc-users] DASetCoordinates

[Jed Brown]

On Tue, Sep 28, 2010 at 20:59, Randall Mackie <rlmackie862 at gmail.com> wrote:
> I'm trying to use the DMMG structure to do multi-grid as a preconditioner.
> My grids have non-uniform
> spacing. I can compute the non-uniform spacing at each level, and I assume I
> can get that information
> to the multigrid solver using DASetCoordinates. I also assume that this is
> needed to correctly compute
> the matrices that allow you to go from one level to another. My questions
> are:
>
> 1) Where exactly should DASetCoordinates be called?

You will have to call it at every level, DARefine and DACoarsen do not
currently interpolate coordinates.  Maybe they should?

Jed