[yt-users] Gadget blocks' configuration

[Britton Smith]

Hi Bernhard,

Does your data come from a specific flavor of Gadget that is supported by
yt?  For example, we currently support OWLS, EAGLE, and Gizmo data that
have fields for individual elements.  If not, then it is probably best to
try and put together a new frontend for this data.  If the type of data
that you're working with is not public or widely used, the best thing may
be to create a frontend that exists as a yt extension (an external module
not inside the main yt codebase).  Here is an example of one that I created
a while back for the FIRE simulation data:
https://bitbucket.org/brittonsmith/yt_fire

If the only thing that is different about your data is the way that the
metallicity fields are defined, then it shouldn't be too difficult to
create a subclass of an existing Gadget frontend that overrides the field
definitions.  Please, let us know if you're interested in pursuing this and
we can work with you.

Britton

On Sat, Sep 17, 2016 at 11:45 AM, Bernhard Röttgers <
broett at mpa-garching.mpg.de> wrote:

> Hello!
>
> I am trying to use trident <https://bitbucket.org/trident-project/trident> (yt-based
> code) to generate spectra out of my Gadget simulations (stored in HDF5). I
> could get the code running, but the spectra are scaled weirdly. I was able
> to track the problem down to a weirdly scaled metallicity block within yt.
> I am guessing that the issue is related to the fact, that my block
> “Metallicity” is in fact element masses for individual elements, i.e. for
> each particle I have an array of masses for the 12 elements He, C, Mg, O,
> Fe, Si, H, N, Ne, S, Ca, and the rest (I know, a crappy naming for such a
> block, but that’s the way it is).
>
> Is there a way to force yt to create the metallicity block correctly?.
>
> Cheers,
> Bernhard
>
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