void AddWaypoint(int x, int y, ref Waypoint waypointCurrent, ref Waypoint waypointPrevious)
{
GameObject gameObject = Instantiate(waypointObject, MapToUnityPosition(MapPositionToGridPosition(x, y)), Quaternion.identity);
waypointCurrent = gameObject.GetComponent <Waypoint>();
if (waypointPrevious != null)
{
waypointPrevious.AddNextWaypoint(waypointCurrent);
waypointCurrent.AddPreviousWaypoint(waypointPrevious);
}
walkableFields.Add(waypointCurrent);
waypointPrevious = waypointCurrent;
waypointCurrent.transform.parent = transform;
}