[Users] prolongation, interpolation

[Erik Schnetter]

Steve

This is the linear prolongation operation in Carpet for vertex-centred
mesh refinement. You'd set order_space=1.

The error message looks off -- op = "lagrange" and order_space = 1 is
exactly what you want, so your parameters may be specifying something
else.

-erik

On Fri, Feb 26, 2016 at 11:33 AM, Steven R. Brandt <sbrandt at cct.lsu.edu> wrote:
> I'm looking for a very simple prolongation strategy, if two points
> exactly coincide the copy the values. If it is between, assign the
> average of the 2 (or 4) neighboring points. How do I get this behavior?
> I tried various interpolators (is it "copy"?), some work and some don't.
> If I try to use "copy", I get an error:
>
> There is no vertex-centred stencil for op="LAGRANGE" or op="COPY" with
> order_space not in {1, 3, 5, 7, 9, 11}
>
> I am setting prolongation_order_space = 1, however. I assume it's the
> vertex centering that's the problem. Thanks.
>
> Cheers,
> Steve
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-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/