volumevoxeldiameter expression function

Returns the approximage diameter of a volume voxel in world space.

See also: volumeindex, volumesample

surface_node is the full path of the surface node. prim_id is the primitive number of the volume primitive within the surface node.

Returns 0 if out of bound values are specified, or the given primitive is not a volume.

volumevoxeldiameter("/obj/geo1/isooffset1", 0)