[yt-users] Clump Finding in yt-3.0

[Matthew Turk]

Hi Peter,

On Thu, Jul 3, 2014 at 4:46 PM, Peter Teuben <teuben at astro.umd.edu> wrote:
> Hi All,
>     have a look at GRID-core,  which came out of H.Gong's thesis.
> It's also in ASCL:
>
> http://ascl.net/GRID-core
>
> Would be cool to have this in yt.
>
> peter
>

Hm, I think this does something different.  It looks like it does
clump finding on projected gravitational potential from FITS files?
The yt grav potential calculator (which currently works in yt-2.x)
does computation of the gravitational potential, which can be applied
to the (3d) contours identified in density pulled out of the clump
finder.  This hasn't been ported to 3.0 yet because the tree code we
used hasn't been ported to use the octree infrastructure in 3.0.  It
would be neat to do this with the contours of potential energy,
though.  Do you know if the GRID-core code works with multi-resolution
regions?

>
> On 07/03/2014 05:18 PM, Matthew Turk wrote:
>> Hi Elina,
>>
>> Finding gravitationally bound regions won't work as is, but finding
>> topologically connected regions will.  I do not think we have the
>> ability at the moment to do anything better than an N^2 binding energy
>> calculation; if you're interested in that, we can have a shot at it,
>> however.
>>
>> -Matt
>>
>> On Thu, Jul 3, 2014 at 4:16 PM, Sendonaris, Elina
>> <16elinas at students.harker.org> wrote:
>>> Hi all,
>>>
>>> I'm working with data from a simulation and would like to find the
>>> gravitationally bound regions of particles in the data. I'm using yt-3.0,
>>> and the documentation says that the code is broken in this version. Have any
>>> of you used this feature in this version, and if so, could you explain how
>>> using it is different from past versions?
>>>
>>> Thank you,
>>> Elina
>>>
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