Hi Tomer, Its possible its a problem with particle data then. Matt Turk or Chris Moody - ideas? I don't think I've ever gotten surface generation to work with particle data, but admittedly, I didn't try very hard :P Cheers, -Jill On Sun, Oct 18, 2015 at 4:44 PM, Tomer Nussbaum < tomer.nussbaum@mail.huji.ac.il> wrote:

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" To: Discussion of the yt analysis package Subject: Re: [yt-users] surf.export_ply issues Message-ID: < CAFwWoV9HeT2UE33LFJHwW7sto0zV6RiX5VojYGFb0PCsLizccg@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@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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