/// <summary>
/// Starts navigation to target city with duration (seconds). Returns false if not found.
/// </summary>
public void FlyToCity (City city, float duration) {
FlyToLocation(city.unitySphereLocation, duration);
}
/// <summary>
/// Returns the index of a city in the cities collection by its reference.
/// </summary>
public int GetCityIndex(City city) {
return GetCityIndex(city, true);
}
/// <summary>
/// Starts navigation to target city. Returns false if not found.
/// </summary>
public void FlyToCity (City city) {
FlyToCity(city, _navigationTime);
}