def test_get_value_ray_3d_transposed():
"""Test using _get_value_ray to interrogate labels in 3D
with the dimensions trasposed.
"""
# make a mock mouse event
mouse_event = MouseEvent(
pos=[25, 25],
position=[10, 5, 5, 1],
dims_point=[0, 0, 0, 1],
dims_displayed=[1, 3, 2],
view_direction=[1, 0, 0, 0],
)
data = np.zeros((5, 20, 20, 20), dtype=int)
data[1, 0:10, 0:10, 0:10] = 1
labels = Labels(data, scale=(1, 2, 1, 1), translate=(0, 5, 5, 5))
# set the dims to the slice with labels
labels._slice_dims((1, 0, 0, 0), ndisplay=3, order=(0, 1, 3, 2))
labels.set_view_slice()
value = labels._get_value_ray(
start_point=np.array([1, 0, 5, 5]),
end_point=np.array([1, 20, 5, 5]),
dims_displayed=mouse_event.dims_displayed,
)
assert value == 1
