For plotting purposes, linear interpolation is fine. There are other things we could do with higher order interpolation, but they're not critical yet.
-David On Sun, Aug 14, 2011 at 9:45 AM, Aron Ahmadia <aron.ahmadia at kaust.edu.sa>wrote: > I'm pretty sure our needs are simple for image coarsening, but I'm going to > cc Manuel and David because I seem to recall that the levels of linear > interpolation available on PETSc grids are only suitable for image > rendering, not, for example, obtaining an accurate low-resolution coarsening > of a solution that you could do numerical analysis on, and I don't remember > if they had grander ambitions for DA interpolation before they discovered > petsc-3.1's current limitations. > > A > > On Sun, Aug 14, 2011 at 9:29 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote: > >> On Sun, Aug 14, 2011 at 01:21, Aron Ahmadia <aron.ahmadia at >> kaust.edu.sa>wrote: >> >>> For what it's worth, one of the PetClaw features (grid coarsening for 2D >>> image rendering), relies on interpolation working for 1 and 2-dimensional >>> uniform and periodic grids, so having this code ready would be useful to us >>> as well. >> >> >> Cool, we all agree that the simple periodic case has to work for the >> release. >> >> Is this application using a linear interpolation procedure or is it based >> on some nonlinear reconstruction? >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20110814/7d48a620/attachment.html>
