Question

Analyze the distinctive points between fixed time step vs. event-to-event model.

Answer 1

Fixed time-step model

In fixed time-step model the timer simulated by the computer is updated at a fixed interval of time. The system is checked to see if any event has taken place during that interval. All the events that  occur during the time interval are considered to have taken place simultaneously at the end of the interval.

 

Event-to-event model

Event-to-event model is also known as the next-event model. In this model the computer advances the time to the occurrence of the next event. In this way, it shifts from one event to the next event and the system state does not change in between. A track of the current time is kept when something interesting happens to the system.