BUG: fix a defect in OffAxisProjectionFixedResolutionBuffer._generate…

…_image_and_mask

yt/utilities/lib/pixelization_routines.pyx

@@ -2112,6 +2112,8 @@ def off_axis_projection_SPH(np.float64_t[:] px,
  depth = 2. * np.sqrt((bounds[1] - bounds[0])**2
  + (bounds[3] - bounds[2])**2
  + (bounds[5] - bounds[4])**2)
+ print("depth=",depth)
+ print("depth.shape=", depth.shape)
  px_rotated, py_rotated, pz_rotated, \
  rot_bounds_x0, rot_bounds_x1, \
  rot_bounds_y0, rot_bounds_y1, \

yt/visualization/fixed_resolution.py

@@ -639,6 +639,7 @@ def _generate_image_and_mask(self, item) -> None:
  self.bounds[5] - self.bounds[4],
  )
  )
+ depth = dd.depth[0] if dd.depth is not None else None
  buff = off_axis_projection(
  dd.dd,
  dd.center,
@@ -651,7 +652,7 @@ def _generate_image_and_mask(self, item) -> None:
  no_ghost=dd.no_ghost,
  interpolated=dd.interpolated,
  north_vector=dd.north_vector,
- depth=dd.depth,
+ depth=depth,
  method=dd.method,
  )
  if self.data_source.moment == 2: