[yt-users] yt.utilities.amr_utils
Renyue Cen
cen at astro.princeton.edu
Sun Jan 13 10:31:04 PST 2013
Hi Matt,
Thanks very much for your prompt help.
Ok, I switched to lib now.
I am trying to do volume rendering of young stars (those formed in the last 100 Myrs, say),
so I did (by emulating some routines I found):
from yt.utilities.lib import CICDeposit_3
def _convertDensity(data):
return data.convert("Density")
def _spdensity(field, data):
blank = na.zeros(data.ActiveDimensions, dtype='float32')
if data.NumberOfParticles == 0: return blank
filter = data.pf.time_units['years']*(data.pf.current_time - data['creation_time']) < 1.e8
if not filter.any(): return blank
amr_utils.CICDeposit_3(data["particle_position_x"][filter].astype(na.float64),
data["particle_position_y"][filter].astype(na.float64),
data["particle_position_z"][filter].astype(na.float64),
data["particle_mass"][filter].astype(na.float32),
na.int64(na.where(filter)[0].size),
blank, na.array(data.LeftEdge).astype(na.float64),
na.array(data.ActiveDimensions).astype(na.int32),
na.float64(data['dx']))
return blank
add_field("star_density", function=_spdensity,
validators=[ValidateSpatial(0)], convert_function=_convertDensity)
this new "star_density" of my own is actually for young stars only
(I initially named things like SFR_density instead of the already defined star_density in the above,
but AMRKDTree does not seem to recognize it, so I am re-using the already defined variable "star_density"
to see if that works). Could I do better in this case?
Best,
Renyue
On Jan 13, 2013, at 1:20 PM, Matthew Turk wrote:
> Hi Renyue,
>
> The module amr_utils became lib a while back. But my guess is that
> you probably don't need to import it anyway, unless you are explicitly
> using one of the routines it provides.
>
> -Matt
>
> On Sun, Jan 13, 2013 at 12:18 PM, Renyue Cen <cen at astro.princeton.edu> wrote:
>> Hi,
>>
>> I am trying to compute gridded density of some subset of particles.
>> So I tried to import some modules first in the python script as follows:
>>
>> from yt.data_objects.field_info_container import \
>> FieldInfoContainer, \
>> NullFunc, \
>> TranslationFunc, \
>> FieldInfo, \
>> ValidateParameter, \
>> ValidateDataField, \
>> ValidateProperty, \
>> ValidateSpatial, \
>> ValidateGridType
>> import yt.data_objects.universal_fields
>> from yt.utilities.physical_constants import mh
>> from yt.funcs import *
>> import yt.utilities.amr_utils as amr_utils
>>
>>
>> But I got this error message:
>>
>> Traceback (most recent call last):
>> File "SFR.py", line 28, in <module>
>> import yt.utilities.amr_utils as amr_utils
>> ImportError: No module named amr_utils
>>
>>
>> Am I doing something wrong?
>>
>> Thanks,
>> Renyue
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