[MethodImpl(MethodImplOptions.Synchronized)] //Alters state of simulation, therefore access synchronized.
public void Step()
{
try
{
Airplane outgoing = null; //Next plane to takeoff.
Airplane incoming = null; //Next plane to land.
AirRoute currRoute = null; //Airplanes current AirRoute.
Airplane ap; //Current airplane of loop.
double currRouteDist;
for (int i = m_airport.Airplanes.Count - 1; i >= 0; i--) //Reverse for loop used because airplanes are removed from list.
{
ap = m_airport.Airplanes[i];
switch (ap.State)
{
case 'I': //In transit
ap.Fuel -= (ap.FuelConsPerHour / 4.0); //Decrement fuel.
ap.DistanceAlongRoute += (ap.CruisingKPH / 4.0); //Increment distance along route.
currRoute = GetRoute(ap.CurrentAirRouteID); //Get airplane's current route.
if (currRoute != null)
{
if (ap.DistanceAlongRoute >= currRoute.DistanceKM) //If reached airport pass control.
{
ap.DistanceAlongRoute = currRoute.DistanceKM;
ap.State = 'C';
m_ATCBiz.PassControl(ap, currRoute.ToAirportID);
m_airport.Airplanes.Remove(ap);
}
else if (ap.DistanceAlongRoute + 300.0 >= currRoute.DistanceKM) //If within 300km of airport pass control.
{
ap.State = 'E';
m_ATCBiz.PassControl(ap, currRoute.ToAirportID);
m_airport.Airplanes.Remove(ap);
}
}
else
{
System.Console.WriteLine("Error: No assigned route for In Transit Airplane " + ap.AirplaneID); //Should never reach this state.
}
currRoute = null; //Reset.
break;
case 'E': //Entering circling
SelectLanding(ap, ref incoming); //Test if this plane should land next.
ap.Fuel -= (ap.FuelConsPerHour / 4.0); //Decrement fuel.
ap.DistanceAlongRoute += (ap.CruisingKPH / 4.0); //Increment distance along route.
currRouteDist = m_ATCBiz.GetRouteDist(ap.CurrentAirRouteID); //Get airplane's current route.
if (ap.Fuel <= 0.0) //Test if crashed.
{
ap.Fuel = 0.0;
ap.State = 'X';
}
else if (currRouteDist != 0)
{
if (ap.DistanceAlongRoute >= currRouteDist) //Can either land this time step (From Entering Circling state) or start Circling.
{
ap.DistanceAlongRoute = currRouteDist;
ap.State = 'C'; //Set to Circling in case plane can't land this time step.
}
}
else
{
System.Console.WriteLine("Error: No assigned route for Entering Circling Airplane " + ap.AirplaneID); //Should never reach this state.
}
break;
case 'C': //Circling
SelectLanding(ap, ref incoming); //Test if this plane should land next.
ap.Fuel -= (ap.FuelConsPerHour / 4.0); //Decrement fuel.
if (ap.Fuel <= 0.0) //Test if crashed.
{
ap.Fuel = 0.0;
ap.State = 'X';
}
break;
case 'L': //Landed
if (ap.TimeLanded >= 60) //If refuelled.
{
if (outgoing != null)
{
if (ap.TimeLanded > outgoing.TimeLanded)
{
outgoing = ap; //Select airplane thats been waiting the longest.
}
}
else
{
outgoing = ap;
}
}
ap.TimeLanded += 15; //Increment time landed.
break;
case 'X': //Crashed
break; //Ignore. No processing required.
default: //Should never reach this.
System.Console.WriteLine("Airplane " + ap.AirplaneID + " in unexpected state: " + ap.State);
break;
}
}
//Finished updating planes status. Now process planes selected to take off & land.
if (outgoing != null) //If a plane has been selected to take off.
{
outgoing.State = 'I'; //Set to In transit and update values.
outgoing.DistanceAlongRoute = 0;
outgoing.CurrentAirRouteID = m_airport.Routes[m_airport.NextRoute].AirRouteID;
outgoing.CurrentAirportID = -1;
outgoing.TimeLanded = -1;
outgoing.Fuel = (m_airport.Routes[m_airport.NextRoute].DistanceKM / outgoing.CruisingKPH) * outgoing.FuelConsPerHour * 1.15;
if (m_airport.Routes[m_airport.NextRoute].DistanceKM <= 300) //If airport within 300km then pass control (Unlikely).
{
m_ATCBiz.PassControl(outgoing, m_airport.Routes[m_airport.NextRoute].ToAirportID);
m_airport.Airplanes.Remove(outgoing);
}
if (m_airport.NextRoute + 2 > m_airport.Routes.Count)
{
m_airport.NextRoute = 0; //Set next airroute.
}
else
{
m_airport.NextRoute += 1;
}
}
if (incoming != null) //If a plane has been selected to land.
{
incoming.State = 'L'; //Set to Landed and update values.
incoming.CurrentAirRouteID = -1;
incoming.DistanceAlongRoute = -1;
incoming.CurrentAirportID = m_airport.AirportID;
incoming.TimeLanded = 0;
}
}
catch (FaultException ex) //SOAP fault.
{
System.Console.WriteLine(ex.Message);
}
catch (CommunicationException ex) //Communication error.
{
System.Console.WriteLine("Can't connect to Server");
System.Console.WriteLine(ex.Message);
}
catch (TimeoutException ex) //Server likely has died or halted.
{
System.Console.WriteLine("Server timed out");
System.Console.WriteLine(ex.Message);
}
catch (Exception ex) //Generic exception for unknown problem.
{
System.Console.WriteLine("Exception type: " + ex.GetType());
System.Console.WriteLine("Exception message: " + ex.Message);
}
}
