[yt-users] Enzo cic_particle_* error
Matthew Turk
matthewturk at gmail.com
Fri Feb 24 15:17:18 PST 2012
Hi Casey,
Yes, point me to it.
-Matt
On Fri, Feb 24, 2012 at 6:14 PM, Casey W. Stark <caseywstark at gmail.com> wrote:
> So I figured out a way to load particle fields onto AMRCoveringGridBase. I
> also had to tack on NumberOfParticles inside the get_data method. cic_*
> expects this attribute, and I couldn't figure out a better way to check for
> it.
>
> My solution is a serious hack right now and performs a lot of extra reads,
> but it would be nice to support this eventually. I will stash it to a branch
> for now. Would anyone be interested in coming back to this and getting it
> into a good enough state to push back to yt/yt?
>
> Best,
> Casey
>
>
> On Thu, Feb 23, 2012 at 7:47 PM, Casey W. Stark <caseywstark at gmail.com>
> wrote:
>>
>> Okay, that explains it. Thanks Matt.
>>
>> I will try the shadow region solution tomorrow.
>>
>> Best,
>> Casey
>>
>>
>> On Thu, Feb 23, 2012 at 7:26 PM, Matthew Turk <matthewturk at gmail.com>
>> wrote:
>>>
>>> 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
>>> >
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>>
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