TYPE: POP
TITLE: Lineage POP

The Lineage POP can be used change characteristics associated with
the particle's genealogy or family tree.

This POP modifies the following attributes: gen, id, origin, parent.

Parameters:
    Activation          - Turns the POP on and off		/activate
    Source Group        - Subset of points to act on
    ID                  - ID identifier				/id
    Origin              - Original particle source		/origin
    Parent              - ID of particle's parent		/parent
    Generation          - How many times particle has split	/gen

Local Variables 
    Overview - The standard local variables are usable in this POP.  Please
               refer to the Houdini manual for more details.
