Computer player: strategic move for transporting flying units

[ledpup]

• Flying units only get ready to transport when they are in the pickup state
• Flying units that can only transport units that are in the embark state
• Land units that are ready to embark will move towards either a port or a flying transport unit, whichever is closer. If it's a flying unit, the land unit moves towards the flying units current location and submits a transport order. It also sets the strategic destination of the flying unit to the destination of the land units move order.
• The flying unit will fly towards the land units move order destination
• Once a land unit has embarked, it switches to the disembark state.
• Once a land unit has embarked, the flying unit transports to the closest enemy region.

[ledpup]

TODO: Find destination region to drop airlifted units

[ledpup]

TODO: have land units dis-embark as soon as they reach landfall, not at the start of the next turn - which wastes a turn for both the flier and the land unit. To do this, will need to make disembark orders executable before or after move orders.

[ledpup]

Done

[ledpup]

Adding an unload unit order to execute after a move is not a good approach because the transporter could get intercepted and stop moving but the transportee will still try to unload.

Instead, at the start of the turn, the transporter/transportee should decide to change their orders from the outset.

[ledpup]

Alternative solution: transportees unload at the end of a turn if they've arrived at a suitable destination - a conditional unload unit order.