Lets you create and edit particle collision events.
Particles > Particle Collision Event Editor
Click a particle object in the Objects list to select it. All events belonging to the selected particle object are displayed in the Events window.
The Event Procedure is a MEL script procedure that will be executed whenever any particle in the particle object that owns the event collides with an object. The procedure must have the following format and argument list:
global proc myEventProc(string $particleName, int $particleID, string $objectName)
where $particleName is the name of the particle object that owns the event, $particleID is the ID number of the particle in that object that has collided, and $objectName is the name of the object against which the particle collided.