Follow up to 5d40992fe8.
In the PBVH API, some contexts that take a `float *` parameter named
`depth` use it purely as a return value, other places, however, read
from and write to this parameter.
In the former case, this commit either adds or keeps the `r_` prefix, in
the latter, this commit ensures the parameter has no prefix to avoid
misleading future readers.
Pull Request: #127886
Blender is the free and open source 3D creation suite.
It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing,
motion tracking and video editing.
Sean Kim
e37f5616f5
