def star_filter(pfilter,data):
age = data["all", "particle_age"]
filter=age.in_units('Myr')>0
return filter
data={'star_density':dd[('deposit', 'new_stars_density')]}
print(data)
Did you cut off the error message? I think there are more lines.The problem here is that "data" should be a dictionary mapping a field name to a 3D array:data = {'star_density': dd[('deposit', 'new_stars_density')]}That should get past the error you are currently seeing.You will then hit another error because the MeshSource is only appropriate to use with unstructured mesh data.Take a look at the volume rendering documentation for more detail about how to use the volume renderer:In particular you should be able to use yt.create_scene with the reloaded dataset.-Nathan_______________________________________________On Tue, Jan 8, 2019 at 11:45 AM Vadlamani Samhitha <vadlamani.samhitha@gmail.com> wrote:Thanks for the suggestion. However, this is how I'm doing it, but not sure if this is the right way to proceed as I end up with an error:filename="/lunarc/nobackup/users/samvad/FINAL-50-0.5/output/output_00051/info_00051.txt"
ds=yt.load(filename
ad=ds.all_data()
dd=ds.arbitrary_grid(left_edge=[0,0,0], right_edge=[1,1,1], dims=[512,512,512])
data=dd[('deposit', 'new_stars_density')]
bbox=np.array([[0,1],[0,1],[0,1]])
ds=yt.load_uniform_grid(data, data.shape, bbox)
ms =MeshSource(ds, ('deposit', 'new_stars_density'))ERROR:Traceback (most recent call last):
File "movie_new_stars.py", line 36, in <module>
ds=yt.load_uniform_grid(data, data.shape, bbox)
File "/home/samvad/yt-conda/lib/python3.6/site-packages/yt/frontends/stream/data_structures.py", line 666, in load_uniform_grid
data, grid_dims=tuple(domain_dimensions))
File "/home/samvad/yt-conda/lib/python3.6/site-packages/yt/frontends/stream/data_structures.py", line 477, in process_data
for field, val in data.items():Thanks!_______________________________________________On Mon, Jan 7, 2019 at 7:27 PM Nathan Goldbaum <nathan12343@gmail.com> wrote:This failure is happening because the MeshSource only works with unstructured mesh data. It will not work with your RAMSES AMR data.Your best bet for volume rendering RAMSES data is to first deposit the data onto a uniform resolution mesh, reaload that data using yt.load_uniform_grid, and volume render the reloaded dataset.We currently do not support volume rendering RAMSES data. We realize this is something that a lot of users want but unfortunately do not have funded developer time right now for working on fixing that situation.Apologies for the trouble, hopefully this makes more sense now.-Nathan_______________________________________________On Mon, Jan 7, 2019 at 4:30 AM Vadlamani Samhitha <vadlamani.samhitha@gmail.com> wrote:_______________________________________________Hi,I'm trying to make a movie by depositing particles on to the mesh:import yt
from yt.visualization.volume_rendering.api import MeshSource
from yt.units import Myr
import yt.visualization.eps_writer as eps
from yt.data_objects.particle_filters import add_particle_filter
import pylab as plt
plt.switch_backend('agg')
def star_filter(pfilter,data):
age = data["all", "particle_age"]
filter = age.in_units('Myr') > 0
return filter
add_particle_filter("new_stars", function=star_filter, filtered_type="all", requires=["particle_age"])
ini=19
fin=21
CMAP = 'hot'
VMIN = 1e3
VMAX = 1e10
for x in range(ini, fin):
filename="/lunarc/nobackup/users/samvad/FINAL-50-0.5/output/output_%0*d/info_%0*d.txt" % (5,x,5,x)
ds=yt.load(filename)
time = ds.current_time
ds.add_particle_filter("new_stars")
ms =MeshSource(ds, ('deposit', 'new_stars_density'))
sc.add_camera(ds)
camera_position = ds.arr([0, 0, 0], 'code_length')
cam.focus = ds.domain_center
north_vector = ds.arr([0, 0, 0], 'dimensionless')
cam.width = ds.arr([ 400, 400, 400], 'kpc')
cam.resolution = (800, 800)
cam.set_position(camera_position, north_vector)# actually make the image here
im = ms.render(cam, cmap=CMAP, color_bounds=(VMIN, VMAX))
plt.clf()
fig = plt.gcf()
ax = plt.gca()
ax.imshow(im, interpolation='nearest', origin='lower')
p = ax.imshow(ms.data, visible=False, cmap=CMAP, vmin=VMIN, vmax=VMAX)
cb = fig.colorbar(p)
cb.set_label(field_name[1])
ax.text(25, 750, 'time = %.2e' % time, color='k')
ax.axes.get_xaxis().set_visible(False)plt.savefig('movie_frames/test_%.3d' % x)But ending up with error:Traceback (most recent call last):
File "movie_new_stars.py", line 32, in <module>
ms =MeshSource(ds, ('deposit', 'new_stars_density'))
File "/home/samvad/yt-conda/lib/python3.6/site-packages/yt/visualization/volume_rendering/render_source.py", line 536, in __init__
self.build_volume_embree()
File "/home/samvad/yt-conda/lib/python3.6/site-packages/yt/visualization/volume_rendering/render_source.py", line 593, in build_volume_embree
mesh_id = int(ftype[-1]) - 1
ValueError: invalid literal for int() with base 10: 't'Any leads on this are highly appreciated.
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