Revert "Remove front line minimum distance."

This reverts commit dbe9691

changelog.md

@@ -18,7 +18,6 @@ Saves from 5.0.0 are compatible with 5.1.0
 * **[Mission Generation]** Fixed mission scripting error when using a dedicated server.
 * **[Mission Generation]** Fixed an issue where empty convoys lead to an index error when a point capture made a pending transfer of units not completable anymore.
 * **[Mission Generation]** Corrected Viggen FR22 & FR24 preset channels for the DCS 2.7.9 update
-* **[Mission Generation]** Fixed an issue which prevented the mission generation if two controlpoints are really close to each other (e.g. Marianas campaigns)
 * **[Mission Generation]** Fixed the SA-5 Generator to use the P-19 FlatFace SR as a Fallback radar if the faction does not have access to the TinShield SR.
 * **[UI]** Enable / Disable the settings, save and stats actions if no game is loaded to prevent an error as these functions can only be used on a valid game.
 

game/theater/frontline.py

@@ -14,6 +14,9 @@
 from ..utils import Heading, pairwise
 
 
+FRONTLINE_MIN_CP_DISTANCE = 5000
+
+
 @dataclass
 class FrontLineSegment:
     """
@@ -169,8 +172,23 @@ def _position_distance(self) -> float:
         """
         total_strength = self.blue_cp.base.strength + self.red_cp.base.strength
         if self.blue_cp.base.strength == 0:
-            return 0
+            return self._adjust_for_min_dist(0)
         if self.red_cp.base.strength == 0:
-            return self.attack_distance
+            return self._adjust_for_min_dist(self.attack_distance)
         strength_pct = self.blue_cp.base.strength / total_strength
-        return strength_pct * self.attack_distance
+        return self._adjust_for_min_dist(strength_pct * self.attack_distance)
+
+    def _adjust_for_min_dist(self, distance: float) -> float:
+        """
+        Ensures the frontline conflict is never located within the minimum distance
+        constant of either end control point.
+        """
+        if (distance > self.attack_distance / 2) and (
+            distance + FRONTLINE_MIN_CP_DISTANCE > self.attack_distance
+        ):
+            distance = self.attack_distance - FRONTLINE_MIN_CP_DISTANCE
+        elif (distance < self.attack_distance / 2) and (
+            distance < FRONTLINE_MIN_CP_DISTANCE
+        ):
+            distance = FRONTLINE_MIN_CP_DISTANCE
+        return distance