This Pull Request lets users plan Tanker flights.
Features:
- Introduction of `Refueling` flight type.
- Tankers can be purchased at airbases and carriers.
- Tankers get planned by AI.
- Tankers are planned from airbases and at aircraft carriers.
- Tankers aim to be at high, fast, and 70 miles from the nearest threat.
(A10s won't be able to tank)
- Tankers racetrack orbit for one hour.
- Optional Tickbox to enable legacy tankers.
- S-3B Tanker added to factions.
- KC-130 MPRS added to factions.
- Kneeboard shows planned tankers, their tacans, and radios.
Limitations:
- AI doesn't know whether to plan probe and drogue or boom refueling
tankers.
- User can't choose tanker speed. Heavily loaded aircraft may have
trouble.
- User can't choose tanker altitude. A-10s will not make it to high
altitude.
Problems:
- Tanker callsigns do not increment, see attached image. (Investigated:
Need to use `FlyingType.callsign_dict`, instead of just
`FlyingType.callsign`. This seems like it might be significant work
to do.).
- Having a flight of two or more tankers only spawns one tanker.
- Let me know if you have a solution, or feel free to commit one.
https://user-images.githubusercontent.com/74509817/120909602-d7bc3680-c633-11eb-80d7-eccd4e095770.png
In the *new* package dialog, a package has been created and may have
aircraft assigned to it, but it is not a part of the ATO until the user
saves it.
Other actions (modifying settings, closing some other dialogs like the
base menu) can cause a Game update which will forcibly close this window
without either accepting or rejecting it, so we neither save the package
nor release any allocated units.
While it would be preferable to be able to update this dialog as needed
in the event of game updates, the quick fix is to just not allow
interaction with other UI elements until the new package has either been
finalized or canceled.
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1027
The AI purchaser will aim to have a 50/50 ground/air investment mix.
This allows it to overspend on one category if significant losses were
taken the previous turn.
The total purchase amount is still limited, so if the bases are full
when only 10% of the investment is in ground units, the full budget for
the turn will still go to air.
Missions with very large numbers of packages and short mission windows
would raise an exception here because we couldn't schedule more
frequently than once a minute. Switch to using seconds instead of
minutes to avoid that problem. If there are more packages than there are
seconds in the mission the game is broken for other reasons.
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1154
