[yt-users] surf.export_ply issues

Tomer Nussbaum tomer.nussbaum at mail.huji.ac.il
Sun Oct 18 07:44:13 PDT 2015


Hey Jill,

I've checked, and export_obj() does not work. :(
All of this function collapse in "get_vertex_centered_data"...

I would really appreciate if someone could answer me on the questions I've
sent, since I try to write some code to solve this issue.


Thanx,
Tomer


Following is the code and errors (python 2.7, YT3.2):
sp = ds.sphere(center=center, radius=(2,'kpc'))
rho = 5e-27
#surf = ds.surface(sp, ('gas', 'density'), rho)
surf = ds.surface(sp, ("deposit", "all_density"), rho)

surf.export_obj("sph_2.kpc",

                color_field = "temperature")


yt : [INFO     ] 2015-10-18 17:27:05,014 Extracting (sampling: temperature)

---------------------------------------------------------------------------NotImplementedError
                      Traceback (most recent call
last)<ipython-input-8-9ab0ccc2f049> in <module>()      1
surf.export_obj("sph_2.kpc",----> 2                 color_field =
"temperature")/home/sharonl/miniconda/envs/iyt32/lib/python2.7/site-packages/yt/data_objects/construction_data_containers.pyc
in export_obj(self, filename, transparency, dist_fac, color_field,
emit_field, color_map, color_log, emit_log, plot_index,
color_field_max, color_field_min, emit_field_max, emit_field_min)
1233         if self.vertices is None:   1234             if
color_field is not None:-> 1235
self.get_data(color_field,"face")   1236         elif color_field is
not None:   1237             if color_field not in self.field_data:
/home/sharonl/miniconda/envs/iyt32/lib/python2.7/site-packages/yt/data_objects/construction_data_containers.pyc
in get_data(self, fields, sample_type, no_ghost)   1032
 my_verts = self._extract_isocontours_from_grid(   1033
                 block, self.surface_field, self.field_value,-> 1034
                              mask, fields, sample_type,
no_ghost=no_ghost)   1035                 if fields is not None:
1036                     my_verts, svals = my_verts
/home/sharonl/miniconda/envs/iyt32/lib/python2.7/site-packages/yt/data_objects/construction_data_containers.pyc
in _extract_isocontours_from_grid(self, grid, field, value, mask,
sample_values, sample_type, no_ghost)   1053
             sample_type = "face",   1054
          no_ghost = False):-> 1055         vals =
grid.get_vertex_centered_data(field, no_ghost = no_ghost)   1056
  if sample_values is not None:   1057             svals =
grid.get_vertex_centered_data(sample_values)
/home/sharonl/miniconda/envs/iyt32/lib/python2.7/site-packages/yt/data_objects/octree_subset.pyc
in get_vertex_centered_data(self, *args, **kwargs)    443     444
def get_vertex_centered_data(self, *args, **kwargs):--> 445
raise NotImplementedError    446     447     @property
NotImplementedError:



Date: Thu, 15 Oct 2015 08:58:50 -0400
From: "Naiman, Jill" <jill.naiman at cfa.harvard.edu>
To: Discussion of the yt analysis package
        <yt-users at lists.spacepope.org>
Subject: Re: [yt-users] surf.export_ply issues
Message-ID:
        <CAFwWoV9HeT2UE33LFJHwW7sto0zV6RiX5VojYGFb0PCsLizccg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi Tomer,

One thing you might try is the export_obj function instead of the
export_ply since its been updated more recently.  I think it *should* work
on particle data these days (though, someone should correct me if I'm
wrong).

If that doesn't work, please let the list know though.

Cheers,
-Jill

On Thu, Oct 15, 2015 at 4:26 AM, Tomer Nussbaum <
tomer.nussbaum at mail.huji.ac.il> wrote:

> Hello there,
>
>
> I want to make a 3D model of my ART simulation with the YT platform. After
> much reading and talking in the YT mirc I understand some code is needed
to
> make it work.
>
> I would appreciate if you could answer me about some questions I have had
> through the last couple of days:
>
> 0. I understand that "export_ply" and the other functions in YTSurfaceBase
> work on other simulation but not on "particle based simulations" like ART.
> is this correct?
> 1. Why does it not work on ART sim?
> 2. What should I do in order to make it run on ART sim?
> 3. What does "get_vertex_centered_data" suppose to do? most of the time
> the error come from this function (not implemented..), is it a the main
> problem? can I work around it?
> 4. Is there a way to transform the ART data to some data that do work in
> order to make it work?
> 5. What is "particle based simulations"?
>
>
>
> Thnx,
> Tomer
>
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