The model is basic in concept... I'd like to read in an external file that has a schedule of when objects should enter the system along with other attributes specific to each object that is created.  I then want to track if any collisions occur between the objects.  I have a Processing visualization completed where I have objects entering a space (not using an external file yet!), and registering if a collision occurs between objects as they move along random vector paths.  

The question I have for the forum in general is if anyone has implemented in Processing some sort of simulation clock for scheduled events/creation of objects, recording times/durations of events, and other elements useful for discrete-event simulations?  I have found references for using a library called SimPackJ with Processing, but it seems it was last updated in 2006.  Is there anything more current, or any ideas on how to best accomplish traditional simulation modeling while leveraging the considerable visualization capabilities of Processing?

Many thanks in advance.