[yt-users] How yt deals with AMR grids and data objects

[Alex Bogert]

Hi Kearn,

Maybe, I'm misunderstanding you, but it sounds like you are trying to map
different layers of the RAMSES AMR to a new grid. Then analyse the new grid?

For example, grab the 5 highest levels of refinement in a 20kpc region
around the highest density then remap these into a simple Y x Y x Y grid,
afterwards properties can be analyzed on the simpler grid. If this sounds
analogous to what your're asking for we should chat, because I'm working on
this as well.

Alex


On Mon, Dec 16, 2013 at 7:23 AM, <k.grisdale at surrey.ac.uk> wrote:

> Dear yt-users
>
> I am attempting to make a tool that will sample the properties of a RAMSES
> galactic disk simulation. The tools needs to be able to work on different
> scales going from very large (10kpc) to the very small (2x the size of the
> smallest cell ~140pc). So far I have achieved this using data objects and
> calling required property/Quantities that I need. On large scales this
> works very well, however on small scales I have run into the issue that
> only part of cells are within in my data object. While this is to be
> expected it is presenting so interesting results. From what I can tell if
> the centre of the cell is in my data object yt treats the cell as if the
> whole cell is within my data object but if the centre is missed it treats
> it as if the whole cell is absent from the data object, I’m looking for a
> median between these extremes.
>
> My question is is there a way to get yt to only take into account the
> proportion of the cell in side my data object?
>
> Also if the cell only has small corner in my data object is there away to
> get yt to fetch the properties of that cell (say the density and cell
> volume) and then multiply these values by the proportion of the cell that
> is in my object?
>
> Thank you in advance for you help
>
> Kearn
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