[Customized] Allow the aircraft to enter area guard mission and not crash immediately without any airport

CREDITS.md

@@ -543,6 +543,7 @@ This page lists all the individual contributions to the project by their author.
   - Jumpjet Climbing Logic Enhancement
   - Fix for pathfinding crashes on big maps due to too small pathfinding node buffer
   - Fix an issue that units' `LaserTrails` will always lags behind by one frame
+  - Allow the aircraft to enter area guard mission and not crash immediately without any airport
 - **Ollerus**:
   - Build limit group enhancement
   - Customizable rocker amplitude

docs/Fixed-or-Improved-Logics.md

@@ -323,14 +323,16 @@ FiringForceScatter=true   ; boolean
 ### Extended Aircraft Missions
 
 - Aircraft will now be able to use waypoints.
-- When a `guard` command (`[G]` by default) is issued, the aircraft will search for targets around the current location and return immediately when target is not found, target is destroyed or ammos are depleted.
-  - If the target is destroyed but ammos are not depleted yet, it will also return because the aircraft's command is one-time.
+- When a `guard` command (`[G]` by default) or a `area guard` command (`[Ctrl]+[Alt]`) is issued, the aircraft will search for targets around the position (for `guard` is the current location, for `area guard` is the target position) and return immediately when ammos are depleted.
+  - If the target is not found, or if there is still ammo when the target is destroyed, it will continue to hover over the guarded area.
 - When an `attack move` command (`[Ctrl]+[Shift]`) is issued, the aircraft will move towards the destination and search for nearby targets on the route for attack. Once ammo is depleted or the destination is reached, it will return.
   - If the automatically selected target is destroyed but ammo is not depleted yet during the process, the aircraft will continue flying to the destination.
 - In addition, the actions of aircraft are also changed.
   - `ExtendedAircraftMissions.SmoothMoving` controls whether the aircraft will return to the airport when the distance to the destination is less than half of `SlowdownDistance` or its turning radius.
   - `ExtendedAircraftMissions.EarlyDescend` controls whether the aircraft not have to fly directly above the airport before starting to descend when the distance between the aircraft and the landing point is less than `SlowdownDistance` (also work for aircraft spawned by aircraft carriers).
   - `ExtendedAircraftMissions.RearApproach` controls whether the aircraft should start landing at the airport from the opposite direction of `LandingDir`.
+  - `ExtendedAircraftMissions.FastScramble` controls whether the aircraft can scramble when its airport has been destroyed.
+  - `ExtendedAircraftMissions.UnlandDamage` controls the damage suffered by the aircraft every 4 frames when there is no airport for the aircraft to land. If the value is negative, it will crash immediately. Not recommended to use when `ExtendedAircraftMissions` is not enabled.
 
 In `rulesmd.ini`:
 ```ini
@@ -341,6 +343,8 @@ ExtendedAircraftMissions=false          ; boolean
 ExtendedAircraftMissions.SmoothMoving=  ; boolean, default to [General] -> ExtendedAircraftMissions
 ExtendedAircraftMissions.EarlyDescend=  ; boolean, default to [General] -> ExtendedAircraftMissions
 ExtendedAircraftMissions.RearApproach=  ; boolean, default to [General] -> ExtendedAircraftMissions
+ExtendedAircraftMissions.FastScramble=  ; boolean, default to [General] -> ExtendedAircraftMissions
+ExtendedAircraftMissions.UnlandDamage=  ; integer, default to 1 if [General] -> ExtendedAircraftMissions = true, otherwise -1
 ```
 
 ### Fixed spawn distance & spawn height for airstrike / SpyPlane aircraft
@@ -1737,7 +1741,7 @@ DestroyAnim.Random=true                ; boolean
 
 - `Ammo.AddOnDeploy` determines the number of ammo added or subtracted after the vehicle has deployed or undeployed.
   - Ammo count cannot go below 0 or above the maximum ammo for vehicle's type (in case the deploy results in type conversion, type is the one after the conversion).
- 
+
 In `rulesmd.ini`:
 ```ini
 [SOMEVEHICLE]       ; VehicleType

docs/Whats-New.md

@@ -443,6 +443,7 @@ New:
 - [Ammo-based deploy customizations for vehicles expanded to non-IsSimpleDeployer deploy functions](New-or-Enhancerd-Logics.md#Automatic-deploy-and-blocking-deploying-based on-ammo) (by Starkku)
 - Randomized anims for several behaviors (by Ollerus)
 - Shield respawn animation and weapon (by Ollerus)
+- Allow the aircraft to enter area guard mission and not crash immediately without any airport (by CrimRecya)
 
 Vanilla fixes:
 - Fixed sidebar not updating queued unit numbers when adding or removing units when the production is on hold (by CrimRecya)