Use OnTickTime to re-evaluate AI air group waypoints

[41Sqn_Banks]

I did some experiments on that subject some month ago. The main problem is that you cannot change the existing waypoint objects, this means you have to create and assign new waypoint objects (that include the updated target position). Now the problem is that you cannot simply clone all waypoints of the air group, update the position of the "attack" waypoints with the current target position and then assign them again, because the air group would turn around and fly back to their first (takeoff) waypoint and start all over.