private void AddRandomCar(Random rng)
{
// Try adding a car until one succeeds (adding may fail if the selected lane does not have enough free space)
// Limit the number of tries, because otherwise we may loop forever (no lane may have enough space)
bool added = false;
int numTries = 0;
while (!added && numTries++ < 2 * world.Roads.Count)
{
Road randomRoad = world.Roads.ToList()[rng.Next(0, world.Roads.Count)];
Lane[] lanes = rng.Next() % 2 == 0 ? randomRoad.OutLanes : randomRoad.InLanes;
if (lanes.Length > 0)
{
VehicleParams carParams;
if (rng.Next() % 4 != 0)
{
carParams = VehicleParams.Car;
}
else
{
carParams = VehicleParams.Truck;
}
Lane randomLane = lanes[rng.Next(0, lanes.Length)];
if (randomLane.FreeLaneSpace() > carParams.VehicleLength + IntelligentDriverModel.MIN_BUMPER_TO_BUMPER_DISTANCE)
{
// Offset to spawn the car into the lane, offset by carLength / 2
float offset = carParams.VehicleLength / (2 * randomLane.Path.Length);
Vehicle car = new Vehicle(world.Cars.Count, carParams, randomLane, offset);
world.AddCar(car);
added = true;
}
}
}
}
