Ensure AI planes spawn at ramps

[togfoxy]

AI planes need to spawn at ramps (in prep for departure) in a random way. This involves:

• understand the current airport the player is at
• understanding the available gates/ramps
• determining which gates/ramps can and will spawn an AI plane
• determining which plane will be spawned
• spawning that plane
• ensuring another plane doesn't spawn there (two planes at one gate/ramp)

[felix-b]

Current status (as of demo # 3):

• understand the current airport the player is at - TODO
• understanding the available gates/ramps - DONE
• determining which gates/ramps can and will spawn an AI plane - DONE but can be improved to account for specific airlines
• determining which plane will be spawned - TODO: currently B738 is always spawned (will post a separate comment on that)
• spawning that plane - DONE
• ensuring another plane doesn't spawn there (two planes at one gate/ramp) - DONE, must be maintained through the progress

[felix-b]

What's necessary to allow multiple aircraft models:

• the user will have to download a full CSL package (https://forums.x-plane.org/index.php?/files/file/37041-bluebell-obj8-csl-packages/). In #15 (nightly build) I put B738 with all available liveries into a ZIP - so B738 can work out of the box, but that's all

• every model has to be configured with a vertical offset and a pitch angle to correctly position it on the ground, otherwise some wheels get sunken into the ground while some are hanging in the air: https://forums.x-plane.org/index.php?/forums/topic/214646-xpmp2-library/&tab=comments#comment-2008952 (you can see what happened to A320). Interesting to check if I can parse OBJ8 files to retrieve these values automatically.

[felix-b]

I think this bullet is necessary to implement the others:

• generate a random flight schedule with departures (and arrivals?) from/to the airport

[togfoxy]

Repeating in this issue:

navref = XPLMFindNavAid( nil, nil, LATITUDE, LONGITUDE, nil, xplm_Nav_Airport)

will return an ICAO code for the players closest (current) airport.

[togfoxy]

When starting at a large airport (YBBN) some planes will spawn at only a few ramps. I would expect a lot more ramps to spawn planes.

[togfoxy]

From Felix: I always take 10 first gates in the order they appear in apt.dat the even one for arrivals, and the odd ones for departures

[togfoxy]

Should this be closed? The issue seems to be 'done'. See the 'next level' issue:

https://github.com/felix-b/atc/issues/200

[felix-b]

Yep, closing this one