[Carpet] Buffer zones in old and new Carpet

[Ian Hinder]

Erik Schnetter wrote:
> On Mar 3, 2008, at 18:59:14, Ian Hinder wrote:
> 
>> Erik Schnetter wrote:
>>
>>> We can add a #define CARPET_HAVE_BUFFER_WIDTH to dd.hh.  Please make
>>> your thorn work before you push this change.
>>
>> In what sense do you mean this?
> 
> 
> I mean that it would not be necessary to add CARPET_HAVE_BUFFER_WIDTH
> unless you actually use it.  If it turns out that your idea for a common
> regridding thorn doesn't work out in the end, then
> CARPET_HAVE_BUFFER_WIDTH doesn't need to be added to Carpet.

In CarpetRegrid2, the dd object that contains the buffer_width member is
obtained by

    assert (Carpet::is_singlemap_mode());
    ...
    dh const & dd = * Carpet::vdd.at (Carpet::map);

I don't really know what singlemap_mode is, but this assertion fails
when I call my equivalent code in global mode.  Is there a way to do
what I am trying to do?

-- 
Ian Hinder
hinder at gravity.psu.edu
http://www.gravity.psu.edu/~hinder