// return "arr" or "x min" of bus reaching next stop
// to show on bus on road
public static string GetArrivalTiming(string vehiclePlate)
{
BusOnRoad bor = ActiveBuses [vehiclePlate];
BusSvc svc = BusSvcs [bor.routeName];
string busStopCode = (string)bor.nextStopEnumerator.Current;
// get diff of distance travelled by bus and distance between stops for the service
var diffDist = svc.distanceBetweenStops [bor.stopCounter] - bor.distanceTravelled;
var time = (int)((diffDist / bor.avgSpeed) / 60); // in min
// if arrived bus stop
if (diffDist < MARGIN_OF_ERROR &&
((string)bor.nextStopEnumerator.Current).Equals(busStopCode))
{
// shift next stop indicator
// if no more stop, finish service
// else, keep counting
if (!bor.nextStopEnumerator.MoveNext())
{
bor.finished = true;
}
else
{
bor.stopCounter++;
}
}
// generate display string (give +- 1 allowance)
return((time == 0 || time == -1) ? "Arr" : ((time > 60 || time < -1) ? "--" : time + " min"));
}
// add bus when bus starts to ply on road
public static void AddBusOnRoad(string vehiclePlate, string routeName)
{
var svc = BusSvcs[routeName];
var stopEnum = svc.stops.GetEnumerator();
// start from the second bus stop for next stop
if (!stopEnum.MoveNext())
{
return;
}
stopEnum.MoveNext();
// construct bor object
var bor = new BusOnRoad {
vehiclePlate = vehiclePlate,
routeName = routeName,
firstStop = svc.firstStop,
lastStop = svc.lastStop,
loopStop = svc.loopStop,
stopCounter = 0,
nextStopEnumerator = stopEnum,
// take firstStop position as initial bus position
latitude = BusStops[svc.firstStop].latitude,
longitude = BusStops[svc.firstStop].longitude,
avgSpeed = 5.0,
currSpeed = 5.0,
distanceTravelled = 0.0,
finished = false
};
ActiveBuses.Add(vehiclePlate, bor);
// start/restart timer dispatch
StartTimerDispatch(svc);
}
public static void GoToNextCheckpoint(BusOnRoad bor)
{
var svc = BusHelper.BusSvcs [bor.routeName];
if (bor.nextCheckpointEnumerator == null)
{
bor.nextCheckpointEnumerator = svc.checkpoints.GetEnumerator();
}
double longitude = BusHelper.BusStops [svc.firstStop].longitude;
double latitude = BusHelper.BusStops [svc.firstStop].latitude;
// update position based on checkpoint
if (bor.nextCheckpointEnumerator.MoveNext())
{
longitude = (double)bor.nextCheckpointEnumerator.Current;
}
else
{
BusHelper.RemoveBusOnRoad(bor.vehiclePlate);
return;
}
if (bor.nextCheckpointEnumerator.MoveNext())
{
latitude = (double)bor.nextCheckpointEnumerator.Current;
}
bor.longitude = longitude;
bor.latitude = latitude;
}
// TODO: helper methods to extract specific bus data
// add bus when bus starts to ply on road
public static void AddBusOnRoad(string vehiclePlate, string routeName)
{
var svc = BusSvcs[routeName];
var stopEnum = svc.stops.GetEnumerator();
stopEnum.MoveNext();
var bus = new BusOnRoad {
vehiclePlate = vehiclePlate,
routeName = routeName,
firstStop = svc.firstStop,
lastStop = svc.lastStop,
nextStopEnumerator = stopEnum,
// take firstStop position as initial bus position
latitude = BusStops[svc.firstStop].latitude,
longitude = BusStops[svc.firstStop].longitude,
speed = 5.0
};
ActiveBuses.Add(vehiclePlate, bus);
}
// simulate bus moving along the route (via checkpoints on route)
public static void GoToNextCheckpoint(BusOnRoad bor)
{
// init if needed
BusSvc svc = BusHelper.BusSvcs [bor.routeName];
if (bor.nextCheckpointEnumerator == null)
{
bor.nextCheckpointEnumerator = svc.checkpoints.GetEnumerator();
}
else if (bor.nextDistanceEnumerator == null)
{
bor.nextDistanceEnumerator = svc.distanceBetweenCheckpoints.GetEnumerator();
}
// default position at first stop
double longitude = BusHelper.BusStops [svc.firstStop].longitude;
double latitude = BusHelper.BusStops [svc.firstStop].latitude;
// update position and distance based on checkpoint
if (bor.nextCheckpointEnumerator.MoveNext())
{
longitude = (double)bor.nextCheckpointEnumerator.Current;
}
if (bor.nextCheckpointEnumerator.MoveNext())
{
latitude = (double)bor.nextCheckpointEnumerator.Current;
}
if (bor.nextDistanceEnumerator != null && bor.nextDistanceEnumerator.MoveNext())
{
bor.distanceTravelled += (double)bor.nextDistanceEnumerator.Current;
}
// update bus position
bor.longitude = longitude;
bor.latitude = latitude;
}