[yt-dev] Deposited particle velocities

[Nathan Goldbaum]

Thanks for the hint, this modification seems to fix things:
http://paste.yt-project.org/show/5070/

I'll be PRing that shortly after testing it out today.

Back to my original question - do you you know where in the code the
deposited fields are set up?  I'd like to look there to see how I should
set up deposited particle velocity fields.


On Wed, Aug 27, 2014 at 8:06 AM, Matthew Turk <matthewturk at gmail.com> wrote:

> Hi Nathan,
>
> Hmm, this looks to me like it could be fixed by smoothing onto the
> final field, rather than an intermediate step.  Does that match your
> expectations?  If so, in the past we've had ways to declaring that
> some fields are derived at the level of the final result.  Perhaps
> anything in the "deposit" namespace could be special-cased that way.
>
> On Tue, Aug 26, 2014 at 7:16 PM, Nathan Goldbaum <nathan12343 at gmail.com>
> wrote:
> > Backing up, there seems to be issues with creating smoothed covering
> grids
> > of any deposited particle field.
> >
> > Take for example the following script:
> > http://paste.yt-project.org/show/5068/
> >
> > This produces the following traceback:
> > http://paste.yt-project.org/show/5069/
> >
> > To fix the error, I tried making the following modification to yt:
> >
> https://bitbucket.org/ngoldbaum/yt/commits/ccc8424f7310070db04f4416b21262504f4a36d3
> >
> > Unfortunately this doesn't help because the smoothed covering grid's
> > _fill_fields function never gets called, which means
> _initialize_level_state
> > never gets called either.  I'm poking around in the smoothed covering
> grid
> > to try to fix this but any help from someone who's more familiar with
> this
> > part of the code would be very much appreciated.
> >
> > -Nathan
> >
> >
> > On Tue, Aug 26, 2014 at 1:33 PM, Nathan Goldbaum <nathan12343 at gmail.com>
> > wrote:
> >>
> >> Hi all,
> >>
> >> I'd like to setup deposition fields for particle velocities.  This means
> >> doing a mass-weighted nearest neighbor or cloud-in-cell deposition of
> the
> >> particle velocities in a grid dataset.  I'm using this to analyze the
> >> stellar velocity dispersions in a simulation, so it's much more
> convenient
> >> to have the particle velocities interpolated onto a grid to calculate
> the
> >> local velocity dispersion using a 3D convolution.
> >>
> >> Does anyone have an example of setting up a particle deposition field?
> If
> >> not, where should I look in the source?
> >>
> >> Thanks for your help!
> >>
> >> -Nathan
> >
> >
> >
> > _______________________________________________
> > yt-dev mailing list
> > yt-dev at lists.spacepope.org
> > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
> >
> _______________________________________________
> yt-dev mailing list
> yt-dev at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.spacepope.org/pipermail/yt-dev-spacepope.org/attachments/20140827/0f2626ed/attachment.htm>