private async Task UpdateVehicleAction(QueuedVehicleAction queuedVehicleAction)
{
if (queuedVehicleAction.Handled)
{
// this queuedVehicleAction has already been handled
return;
}
// This function must be re-entrant as it's running as a timer interval handler
await _VehiclePositionsLock.WaitAsync();
try
{
if (!_updatingVehiclePositions)
{
_updatingVehiclePositions = true;
foreach (var vehicle in this._gameScenario.Vehicles
.Where(v => v.Key == queuedVehicleAction.Name)
.Select(x => x.Value))
{
if (TryUpdateVehicleAction(vehicle, queuedVehicleAction))
{
if (this._constants.allowSubjectNextInsideGameLoop)
{
_subject.OnNext(vehicle.ToModel());
}
if (queuedVehicleAction.VehicleAction == VehicleAction.TurnLeft || queuedVehicleAction.VehicleAction == VehicleAction.TurnRight)
{
await CheckVehicleForUnsafeVehiclesToSave(vehicle);
}
}
}
// very important!! don't forget to mark this as handled
queuedVehicleAction.Handled = true;
_updatingVehiclePositions = false;
}
}
finally
{
_VehiclePositionsLock.Release();
}
}
private bool TryUpdateVehicleAction(Vehicle host, QueuedVehicleAction action)
{
if (host.DrivingStatus == DrivingStatus.Crashed.ToString())
{
return(false);
}
switch (action.VehicleAction)
{
case VehicleAction.IncreaseSpeed_CruiseInitiated:
if (!host.IsGoingDesiredMph)
{
// accelerating to desired speed
host.AddMph(_constants.VEHICLE_MPH_ACCELERATION_INCREMENT_RATE, isHumanInitiating: false);
if (host.DrivingStatus != DrivingStatus.Resuming.ToString())
{
host.Status = $"resuming to {host.AdaptiveCruiseDesiredMph} mph";
host.DrivingStatus = DrivingStatus.Resuming.ToString();
if (this._constants.allowSubjectNextInsideGameLoop)
{
_subject.OnNext(host.ToModel());
}
}
this._gameScenario.Vehicles[host.Name] = host;
}
break;
case VehicleAction.IncreaseSpeed_UserInitiated:
if (TryIncreaseVehicleMph(host, this._constants.VEHICLE_MPH_ACCELERATION_INCREMENT_RATE))
{
host.DrivingStatus = DrivingStatus.Accelerating.ToString();
if (host.AdaptiveCruiseOn)
{
// keep in AdaptiveCruiseMph insync w/ human accelerating
host.AdaptiveCruiseDesiredMph = host.Mph;
}
}
break;
case VehicleAction.DecreaseSpeed_CruiseInitiated:
if (host.AdaptiveCruiseDesiredMph == 0)
{
// store original speed (so we can return to it when the slow car moves)
host.AdaptiveCruiseDesiredMph = host.Mph;
}
host.SubtractMph(this._constants.VEHICLE_GRADUAL_MPH_BRAKE_RATE);
if (host.Mph == 0)
{
if (host.DrivingStatus != DrivingStatus.Stopped.ToString())
{
host.Status = $"stopped for {action.leadVehicleName}";
host.DrivingStatus = DrivingStatus.Stopped.ToString();
if (this._constants.allowSubjectNextInsideGameLoop)
{
_subject.OnNext(host.ToModel());
}
}
this._gameScenario.Vehicles[host.Name] = host;
}
else
{
if (host.DrivingStatus != DrivingStatus.AutoBraking.ToString())
{
host.Status = $"autobraking for {action.leadVehicleName}";
host.DrivingStatus = DrivingStatus.AutoBraking.ToString();
if (this._constants.allowSubjectNextInsideGameLoop)
{
_subject.OnNext(host.ToModel());
}
}
this._gameScenario.Vehicles[host.Name] = host;
}
break;
case VehicleAction.DecreaseSpeed_UserInitiated:
if (TryDecreaseVehicleMph(host, this._constants.VEHICLE_GRADUAL_MPH_BRAKE_RATE))
{
if (host.Mph == 0)
{
if (host.DrivingStatus != DrivingStatus.Stopped.ToString())
{
TryUpdateVehicleDrivingStatus(host, DrivingStatus.Stopped);
host.DrivingStatus = DrivingStatus.Stopped.ToString();
host.Status = $"stopped by {action.leadVehicleName}";
if (this._constants.allowSubjectNextInsideGameLoop)
{
_subject.OnNext(host.ToModel());
}
}
this._gameScenario.Vehicles[host.Name] = host;
}
else
{
TryUpdateVehicleDrivingStatus(host, DrivingStatus.Braking);
}
if (host.AdaptiveCruiseOn)
{
// keep in AdaptiveCruiseMph insync w/ human deaccelaration
host.AdaptiveCruiseDesiredMph = host.Mph;
}
}
break;
case VehicleAction.TurnLeft:
if (host.Mph > 0 && host.Y >= 3)
{
host.Y -= 1;
TryUpdateVehicleDrivingStatus(host, DrivingStatus.TurningLeft);
CheckVehicleForUnsafeVehiclesToSave(host);
}
break;
case VehicleAction.TurnRight:
if (host.Mph > 0 && host.Y < 8)
{
host.Y += 1;
TryUpdateVehicleDrivingStatus(host, DrivingStatus.TurningRight);
CheckVehicleForUnsafeVehiclesToSave(host);
}
break;
case VehicleAction.ToggleAdaptiveCruise:
host.AdaptiveCruiseOn = !host.AdaptiveCruiseOn;
if (host.Mph == 0)
{
host.AdaptiveCruiseDesiredMph = 0;
}
else if (host.AdaptiveCruiseOn && host.Mph > 0)
{
TryUpdateVehicleDrivingStatus(host, DrivingStatus.Cruising);
// keep AdaptiveCruiseMph insync w/ human initiated events, like enabled AC
host.AdaptiveCruiseDesiredMph = host.Mph;
}
else if (!host.AdaptiveCruiseOn && host.Mph > 0)
{
TryUpdateVehicleDrivingStatus(host, DrivingStatus.Driving);
host.AdaptiveCruiseDesiredMph = 0;
}
break;
}
return(true);
}
