Added a new setting: "Maximum frontline length (km)"

It replaces the FRONTLINE_LENGTH constant, which was used previously. The default setting for the frontline length has been set to match the FRONTLINE_LENGTH value (80 km), but I feel the default should be a bit shorter. Discussion on the topic would be welcome.

game/ato/flightplans/cas.py

@@ -52,9 +52,8 @@ class CasFlightPlan(PatrollingFlightPlan[CasLayout]):
 
     @property
     def engagement_distance(self) -> Distance:
-        from game.missiongenerator.frontlineconflictdescription import FRONTLINE_LENGTH
-
-        return meters(FRONTLINE_LENGTH) / 2
+        max_length = self.flight.coalition.game.settings.max_frontline_length * 1000
+        return meters(max_length) / 2
 
     @property
     def combat_speed_waypoints(self) -> set[FlightWaypoint]:
@@ -79,7 +78,7 @@ class Builder(IBuilder[CasFlightPlan, CasLayout]):
         )
 
         ingress, heading, distance = FrontLineConflictDescription.frontline_vector(
-            location, self.theater
+            location, self.theater, self.coalition.game.settings
         )
         center = ingress.point_from_heading(heading.degrees, distance / 2)
         egress = ingress.point_from_heading(heading.degrees, distance)

game/game.py

@@ -490,7 +490,7 @@ class Game:
         # By default, use the existing frontline conflict position
         for front_line in self.theater.conflicts():
             position = FrontLineConflictDescription.frontline_position(
-                front_line, self.theater
+                front_line, self.theater, self.settings
             )
             zones.append(position[0])
             zones.append(front_line.blue_cp.position)

game/missiongenerator/drawingsgenerator.py

@@ -90,7 +90,7 @@ class DrawingsGenerator:
                 heading,
                 distance,
             ) = FrontLineConflictDescription.frontline_vector(
-                front_line, self.game.theater
+                front_line, self.game.theater, self.game.settings
             )
 
             end_point = plane_start.point_from_heading(heading.degrees, distance)

game/missiongenerator/flotgenerator.py

@@ -97,11 +97,11 @@ class FlotGenerator:
 
     def generate(self) -> None:
         position = FrontLineConflictDescription.frontline_position(
-            self.conflict.front_line, self.game.theater
+            self.conflict.front_line, self.game.theater, self.game.settings
         )
 
         frontline_vector = FrontLineConflictDescription.frontline_vector(
-            self.conflict.front_line, self.game.theater
+            self.conflict.front_line, self.game.theater, self.game.settings
         )
 
         # Create player groups at random position

game/missiongenerator/frontlineconflictdescription.py

@@ -7,14 +7,12 @@ from dcs.country import Country
 from dcs.mapping import Point
 from shapely.geometry import LineString, Point as ShapelyPoint
 
+from game.settings import Settings
 from game.theater.conflicttheater import ConflictTheater, FrontLine
 from game.theater.controlpoint import ControlPoint
 from game.utils import Heading
 
 
-FRONTLINE_LENGTH = 80000
-
-
 class FrontLineConflictDescription:
     def __init__(
         self,
@@ -54,12 +52,12 @@ class FrontLineConflictDescription:
 
     @classmethod
     def frontline_position(
-        cls, frontline: FrontLine, theater: ConflictTheater
+        cls, frontline: FrontLine, theater: ConflictTheater, settings: Settings
     ) -> Tuple[Point, Heading]:
         attack_heading = frontline.attack_heading
         position = cls.find_ground_position(
             frontline.position,
-            FRONTLINE_LENGTH,
+            settings.max_frontline_length * 1000,
             attack_heading.right,
             theater,
         )
@@ -69,19 +67,25 @@ class FrontLineConflictDescription:
 
     @classmethod
     def frontline_vector(
-        cls, front_line: FrontLine, theater: ConflictTheater
+        cls, front_line: FrontLine, theater: ConflictTheater, settings: Settings
     ) -> Tuple[Point, Heading, int]:
         """
         Returns a vector for a valid frontline location avoiding exclusion zones.
         """
-        center_position, heading = cls.frontline_position(front_line, theater)
+        center_position, heading = cls.frontline_position(front_line, theater, settings)
         left_heading = heading.left
         right_heading = heading.right
         left_position = cls.extend_ground_position(
-            center_position, int(FRONTLINE_LENGTH / 2), left_heading, theater
+            center_position,
+            int(settings.max_frontline_length * 1000 / 2),
+            left_heading,
+            theater,
         )
         right_position = cls.extend_ground_position(
-            center_position, int(FRONTLINE_LENGTH / 2), right_heading, theater
+            center_position,
+            int(settings.max_frontline_length * 1000 / 2),
+            right_heading,
+            theater,
         )
         distance = int(left_position.distance_to_point(right_position))
         return left_position, right_heading, distance
@@ -95,9 +99,12 @@ class FrontLineConflictDescription:
         defender: Country,
         front_line: FrontLine,
         theater: ConflictTheater,
+        settings: Settings,
     ) -> FrontLineConflictDescription:
         assert cls.has_frontline_between(front_line.blue_cp, front_line.red_cp)
-        position, heading, distance = cls.frontline_vector(front_line, theater)
+        position, heading, distance = cls.frontline_vector(
+            front_line, theater, settings
+        )
         conflict = cls(
             position=position,
             heading=heading,

game/missiongenerator/missiongenerator.py

@@ -202,6 +202,7 @@ class MissionGenerator:
                 self.mission.country(self.game.red.country_name),
                 front_line,
                 self.game.theater,
+                self.game.settings,
             )
             # Generate frontline ops
             player_gp = self.game.ground_planners[player_cp.id].units_per_cp[

game/missiongenerator/visualsgenerator.py

@@ -84,7 +84,7 @@ class VisualsGenerator:
                 heading,
                 distance,
             ) = FrontLineConflictDescription.frontline_vector(
-                front_line, self.game.theater
+                front_line, self.game.theater, self.game.settings
             )
             if not plane_start:
                 continue

game/settings/settings.py

@@ -394,6 +394,15 @@ class Settings:
         min=30,
         max=150,
     )
+    # Mission specific
+    max_frontline_length: int = bounded_int_option(
+        "Maximum frontline length (km)",
+        page=MISSION_GENERATOR_PAGE,
+        section=GAMEPLAY_SECTION,
+        default=80,
+        min=1,
+        max=100,
+    )
 
     # Performance
     perf_smoke_gen: bool = boolean_option(