TYPE: POP
TITLE: Kill POP

The Kill POP kills particles based on rules. If the rule evaluates to
a non-zero value for any particle in the inputs, the particle is killed.
An event can be generated if any particles are killed. In addition, all 
killed particles can be added to a point group.

This POP modifies the following attributes: pstate.

Parameters:
    Activation       - Turns the POP on and off			/activate
    Source Group     - Subset of points to act on
    Predefined Rules - Use some predefined rules 
    Rule             - If this rule evaluates to 1 for any particle, 
                       that particle is killed.
    Event            - Name of event to generate
    Group            - Name of new group to contain killed particles
    Preserve Group   - Add particles to group instead of clearing group first

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