[yt-users] Enzo cic_particle_* error

Matthew Turk matthewturk at gmail.com
Thu Feb 23 19:26:09 PST 2012


Hi Casey,

On Thu, Feb 23, 2012 at 10:23 PM, Casey W. Stark <caseywstark at gmail.com> wrote:
> Hi all.
>
> I'm trying to make a covering grid of the full domain of an enzo
> (cosmological) simulation, getting the dark matter density and velocity
> fields. This works fine with the gas:
>
> In [1]: cg = pf.h.covering_grid(0, [0,0,0], [256,256,256],
> fields=["Density", "x-velocity", "y-velocity", "z-velocity"])
>
> But then I try the DM fields:
>
> In [2]: cg = pf.h.covering_grid(0, [0,0,0], [256,256,256],
> fields=["Dark_Matter_Density", "cic_particle_velocity_x",
> "cic_particle_velocity_y", "cic_particle_velocity_z"])
>
> ... ipython cruft ...
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/data_objects/data_containers.pyc
> in __init__(self, level, left_edge, dims, fields, pf, num_ghost_zones,
> use_pbar, **kwargs)
>    3342         self.domain_width = na.rint((self.pf.domain_right_edge -
>    3343
> self.pf.domain_left_edge)/self.dds).astype('int64')
> -> 3344         self._refresh_data()
>    3345
>    3346     def _get_list_of_grids(self, buffer = 0.0):
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/data_objects/data_containers.pyc
> in _refresh_data(self)
>    3359
>    3360     def _refresh_data(self):
> -> 3361         AMR3DData._refresh_data(self)
>    3362         self['dx'] = self.dds[0] * na.ones(self.ActiveDimensions,
> dtype='float64')
>    3363         self['dy'] = self.dds[1] * na.ones(self.ActiveDimensions,
> dtype='float64')
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/data_objects/data_containers.pyc
> in _refresh_data(self)
>     307         """
>     308         self.clear_data()
> --> 309         self.get_data()
>     310
>     311     def keys(self):
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/data_objects/data_containers.pyc
> in get_data(self, fields)
>    3377                 try:
>    3378                     #print "Generating", field
>
> -> 3379                     self._generate_field(field)
>    3380                     continue
>    3381                 except NeedsOriginalGrid, ngt_exception:
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/data_objects/data_containers.pyc
> in _generate_field(self, field)
>    3404             # First we check the validator; this might even raise!
>
>    3405             self.pf.field_info[field].check_available(self)
> -> 3406             self[field] = self.pf.field_info[field](self)
>    3407         else: # Can't find the field, try as it might
>    3408             raise KeyError(field)
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/data_objects/field_info_container.pyc
> in __call__(self, data)
>     314         ii = self.check_available(data)
>     315         original_fields = data.keys()  # Copy
> --> 316         dd = self._function(self, data)
>     317         dd *= self._convert_function(data)
>     318         for field_name in data.keys():
>
> /project/projectdirs/nyx/yt-installs/yt-hopper/src/yt-hg/yt/frontends/enzo/fields.pyc
> in _cic_particle_field(field, data)
>     332     particle_field = field.name[4:]
>     333     top = na.zeros(data.ActiveDimensions, dtype='float32')
> --> 334     if data.NumberOfParticles == 0: return top
>     335     particle_field_data = data[particle_field] *
> data['particle_mass']
>     336
> amr_utils.CICDeposit_3(data["particle_position_x"].astype(na.float64),
>
> AttributeError: 'AMRCoveringGrid' object has no attribute
> 'NumberOfParticles'
>
> Are you not supposed to use a covering grid with these fields or am I
> creating the covering grid incorrectly? I get reasonable looking plots if I
> slice/project cic_particle_velocity_x, so I believe it's working otherwise.

As it stands, covering grids do not yet have particle support.

Adding support should be relatively straightforward; inside get_data,
if it's a particle field, set up a shadow region from the left_edge to
the right_edge, and then retrieve the field from that.

-Matt

>
> Best,
> Casey
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>



More information about the yt-users mailing list