[yt-users] Particle Fields Deposition

[Desika Narayanan]

Hi Bili,

At least some data sets seem to need the bounds specified -- I *think* this
is to obviate a potentially bad guess as to the bounds of the particles,
but I could be wrong about this.

I'll try to have a look into the source tomorrow.
-d


On Tue, Jul 21, 2015 at 3:48 PM, Bili Dong <qobilidop at gmail.com> wrote:

> Thanks Desika!
>
> I’m experimenting on it. Seems that if I don’t specify bounding box, yt
> will try to guess it from the header information, which is exactly what I
> expected to specify. That’s so impressive!
>
> I’m still wondering what the point is in specifying a larger bounding box
> as in the case of the cook book example. Is it just an example to show the
> functionality or am I missing something?
>
> Regards,
> Bili
>
> On Jul 21, 2015, at 12:04 PM, Desika Narayanan <dnarayan at haverford.edu>
> wrote:
>
> no problem.  note - you might need to set a bounding box on the load
> command similar to this cook book example.
>
> http://yt-project.org/doc/cookbook/gadget_notebook.html
>
>
>
> On Tue, Jul 21, 2015 at 2:42 PM, Bili Dong <qobilidop at gmail.com> wrote:
>
>> Hi Desika,
>>
>> Thanks for your help!
>>
>> Regards,
>> Bili
>>
>> > On Jul 20, 2015, at 7:19 PM, Desika Narayanan <dnarayan at haverford.edu>
>> wrote:
>> >
>> >
>> > Hi Bili,
>> > 1 . I wrote an example script that does some of the things you want in
>> > question 1 here
>> >
>> > http://paste.yt-project.org/show/5727/
>> >
>> > 2. When you load the octree, you can change the threshold number of
>> > particles necessary for refinment by :
>> >
>> > ds = load(filename, n_ref = 32)
>> >
>> > Not sure about 3 or 4, but I think the answer is that the kernel is
>> > hardcoded in.
>> >
>> >
>> > -d
>> >
>> > On Mon, Jul 20, 2015 at 4:56 PM, Bili Dong <qobilidop at gmail.com> wrote:
>> >
>> >> Hi yt users,
>> >>
>> >> Recently I started using yt to analyze a Gadget-like data (one of the
>> main
>> >> difference being a different kernel function).  I?ve got several
>> questions
>> >> about the fields depostion mechanism:
>> >>
>> >> 1. How do I get the information of the underlying mesh onto which the
>> >> fields are deposited?
>> >> 2. Can I specify the properties of the underlying mesh? If so, how?
>> >> 3. Can I customize the smoothing process, like using a different
>> smoothing
>> >> kernel?
>> >> 4. I?m looking into the file yt/geometry/particle_smooth.pyx to learn
>> the
>> >> implementation details of the smoothing process. But for me, the code
>> is
>> >> not easy to read. So I?m wondering if there are further documentations
>> I
>> >> could refer to? (The only relevant doc I find for now is this one
>> >> <
>> http://yt-project.org/docs/dev/analyzing/fields.html#general-particle-fields
>> >
>> >> )
>> >>
>> >> I?m new to yt, so these questions might be dumb. Sorry for wasting your
>> >> time if that?s the case.
>> >>
>> >> Thanks,
>> >> Bili
>> >>
>> >>
>> >>
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