[Users] Carpet questions

[Roland Haas]

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Hello Steve,

> First: Is there a way to determine whether a given grid point 
> (regardless of level in the refinement hierarchy) also exists on a
> finer grid?
I don't know of an official way to do so. Essentially you want to do
what the function map_points in CarpetInterp/src/interp.cc does.

A while ago I had need for this functionality and extracted the code
for this and wrapped it into a callable function. Attached please find
the thorn that I had created for this. It exports and aliased function
MapPoints that returns the refinement level and processor owning a
point. It's arguments are more or less the same as the interpolator
call. The code is more or less exactly what is in interp.cc.

> Second: Is there a way to disable subcycling? I.e. what I want to
> do is evolve all levels simultaneously with the finest grid step.
> Is there a way to do that?
Setting all Carpet::time_refinement_factors parameters to 1 might do
the trick.

Yours,
Roland

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