yt-project/yt

Off axis Slice Plot breaks when using derived field and default center

biboyd opened this issue · 1 comments

biboyd commented

Bug report

Bug summary

Creating an OffAxisSlicePlot with a derived field (e.g. ('gas', 'radial_velocity') yields an error unless the center is defined (e.g. center=ds.domain_center).

Code for reproduction
Using IsolatedGalaxy dataset

import yt

ds = yt.load("IsolatedGalaxy/galaxy0030/galaxy0030")
yt.SlicePlot(ds, [0.5, 0., 0.5], ("gas", "radial_velocity"))

Actual outcome

Traceback (most recent call last):
  File "/home/biboyd/workspace/yt_bug_fix/test_yt.py", line 4, in <module>
    yt.SlicePlot(ds, [0.5, 0., 0.5], ("gas", "radial_velocity"))
  File "/home/biboyd/Repo/my_yt/yt/visualization/plot_window.py", line 2238, in __init__
    cutting.get_data(fields)
  File "/home/biboyd/Repo/my_yt/yt/data_objects/selection_objects/data_selection_objects.py", line 220, in get_data
    self._generate_fields(fields_to_generate)
  File "/home/biboyd/Repo/my_yt/yt/data_objects/selection_objects/data_selection_objects.py", line 252, in _generate_fields
    fd = self._generate_field(field)
  File "/home/biboyd/Repo/my_yt/yt/data_objects/data_containers.py", line 273, in _generate_field
    tr = self._generate_fluid_field(field)
  File "/home/biboyd/Repo/my_yt/yt/data_objects/data_containers.py", line 291, in _generate_fluid_field
    rv = finfo(gen_obj)
  File "/home/biboyd/Repo/my_yt/yt/fields/derived_field.py", line 285, in __call__
    dd = self._function(self, data)
  File "/home/biboyd/Repo/my_yt/yt/fields/geometric_fields.py", line 175, in _spherical_theta
    coords = get_periodic_rvec(data)
  File "/home/biboyd/Repo/my_yt/yt/fields/field_functions.py", line 47, in get_periodic_rvec
    coords = obtain_position_vector(data).d
  File "yt/utilities/lib/misc_utilities.pyx", line 586, in yt.utilities.lib.misc_utilities.obtain_position_vector
AttributeError: 'str' object has no attribute 'to'

Expected outcome

Expected a Slice

Version Information

  • Operating System: Ubuntu 22.04
  • Python Version: 3.10.12
  • yt version: 4.4.dev0 Changeset = c148f72
  • Other Libraries (if applicable):

yt installed from source

chrishavlin commented

Thanks for the report, @biboyd ! Turned out to be a simple one-line fix I think. If you want to install from source to try it out while it awaits review, you can do:

pip install git+https://github.com/chrishavlin/yt.git@fix_off_axis_set_center
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