} // end GenerateArrivalEvents
private void GenerateDepartureEvent(Registrant registrant)
{
// generates a random interval for how long the person takes, with a minimum of 1 minute
// and 30 seconds
TimeSpan wait = new TimeSpan(0, 0, (int)(90 + NegExp(AvgRegistrationTime.TotalSeconds - 90)));
// Creates departure event based on the time interval plus the time we are currently
// at in the Priority Queue
Event newDepartureEvent = new Event(EventType.DEPARTURE, ((EventPQ.Peek( ).Time + wait)));
//Associates departure event with registrant
newDepartureEvent.Registrant = registrant;
registrant.Departure = newDepartureEvent;
// Adds departure event to the queue
EventPQ.Enqueue(newDepartureEvent);
// Update wait times for statistic counters
TotalWait += wait;
if (wait > LongestWait)
{
LongestWait = wait;
}
if (wait < ShortestWait)
{
ShortestWait = wait;
}
} // end GenerateDepartureEvents
} // end SetupSimulation
#region Generate Arrival and Departure Events
/// <summary>
/// Generates the arrival events for registrants and adds them to event Priority Queue
/// </summary>
private void GenerateArrivalEvents( )
{
TimeSpan start;
TimeSpan timeOpen = EndTime - StartTime;
for (int registrant = 1; registrant <= NumRegistrants; registrant++)
{
// Generate random amount of time between 0 and registration open period
start = new TimeSpan(0, 0, R.Next((int)timeOpen.TotalSeconds));
// Create arrival event
Event newEvent = new Event(EventType.ARRIVAL, (StartTime + start));
// Create registrant
Registrant newRegistrant = new Registrant(registrant, newEvent);
// Associate registrant with event
newEvent.Registrant = newRegistrant;
newRegistrant.Arrival = newEvent;
// Add arrival event to Priority Queue of events
EventPQ.Enqueue(newEvent);
}
} // end GenerateArrivalEvents
} // end GenerateDepartureEvents
#endregion
public void RunSimulation( )
{
Queue <Registrant> shortestLine = null;
Queue <Registrant> currentLine = null;
if (EventPQ.IsEmpty( )) // Indicates simulation is finished running
{
Complete = true;
return;
}
if (EventPQ.Peek( ).Type == EventType.ARRIVAL) // If the event is an arrival
{
// Find shortest line and add registrant
shortestLine = FindShortestLine( );
shortestLine.Enqueue(EventPQ.Peek( ).Registrant);
// Increment if new largest queue found
if (shortestLine.Count > LargestQueue)
{
LargestQueue++;
}
// Generate departure event if this customer is at the front of the line
if (shortestLine.Count == 1)
{
GenerateDepartureEvent(shortestLine.Peek( ));
}
// Event completely handled; remove the event and add to counter
EventPQ.Dequeue( );
TotalArrivals++;
TotalEvents++;
}
else // If the event is a departure
{
// Get the line that registrant is about to leave
for (int i = 0; i < WaitLines.Count; i++)
{
if (WaitLines[i].Count > 0)
{
if (WaitLines[i].Peek( ).ID == EventPQ.Peek( ).Registrant.ID)
{
currentLine = WaitLines[i];
break;
}
}
}
// Remove registrant from wait line
currentLine.Dequeue( );
TotalDepartures++;
TotalEvents++;
// If the wait line is not empty, generate a departure event for the next registrant
if (currentLine.Count > 0)
{
GenerateDepartureEvent(currentLine.Peek( ));
}
// Departure event handled; remove from Priority Queue
EventPQ.Dequeue( );
}
} // end RunSimulation