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M3isFather
Returns 1 if the '_father_' object is indeed above the '_son_' object in the tree structure.

I M3isFather (
S3d _session_
H3d _son_
H3d _father_
)
Parameters

_session_
3D Session
_son_
3D object
_father_
3D object
Return value

1 if successful, otherwise nil