TYPE: SOP
TITLE: Pop Merge SOP

This SOP uses an external POP network to run a particle simulation.
It will import the state of the external POP network using the
provided parameters.  By connecting SOPs to the inputs of this SOP,
one can override the Context Geometry which is used by the POP
network. 

Parameters:

    POP Path      - A path to the POP to cook.  If it points to a POP
                    network, it will use the cook POP of that network.
Standard
    Start Time    - Time at which simulation starts		/timestart
    Preroll Time  - At start time, simulation has already been running
                    this long					/timepreroll
    Initial State - geometry to use as initial state of simulation
    Oversampling  - How many times to cook in between frames 	/oversample
    Max # of Particles - Controls the maximum number of particles that
                         can exist in the simulation at any given
                         moment. A value of 0 means particles can
                         always be birthed.			/maxparticles
    Remove Unused Points - Remove unused points from input geometry.
RBD
    Rest Threshold     - The minimum relative velocity two RBD particles
                         must have to be considered colliding.	/restthreshold
    Contact Tolerance  - The distance at which RBD particles are treated
                         as being in contact.	/contacttol
    Max Time Splits    - A measure of how accurately RBD collisions should
                         be detected.	/maxdivisions
    Constraint Time    - Approximate time allowed to satisfy RBD
			 constraints.	/constrainttime
    Solver Type        - Type of solver to be used by the RBD solver.
Input Geo
    SOP                - The path to a SOP to use as a Context Geometry

See also: Particle, POP Network(popnet)
