Advanced Atmospheric Control Roll Errata

megamek/i18n/megamek/common/options/messages.properties

@@ -440,7 +440,7 @@ GameOptionsInfo.option.advanced_movement.description=Newtonian physics-style mov
 GameOptionsInfo.option.heat_by_bay.displayableName=StratOps Advanced Heat
 GameOptionsInfo.option.heat_by_bay.description=Heat is produced by individual weapons bays rather than arcs
 GameOptionsInfo.option.atmospheric_control.displayableName=StratOps Advanced Atmospheric Control Rolls
-GameOptionsInfo.option.atmospheric_control.description=atmospheric control rolls only made for damage above the damage threshold
+GameOptionsInfo.option.atmospheric_control.description=Atmospheric control rolls occur where the total damage taken by a unit in a turn exceeds its highest damage threshold, or where one damage grouping exceeds the threshold of the target location.
 GameOptionsInfo.option.ammo_explosions.displayableName=StratOps Ammo explosions
 GameOptionsInfo.option.ammo_explosions.description=Roll 2D6 on critical hits to ammo-fed weapons. On a roll of 10 or higher, the ammunition explodes.
 GameOptionsInfo.option.stratops_aa_fire.displayableName=(Unofficial) Advanced Anti-Aircraft
@@ -489,6 +489,8 @@ GameOptionsInfo.option.crashed_dropships_survive.displayableName=(Unofficial) Un
 GameOptionsInfo.option.crashed_dropships_survive.description=If checked, DropShips (and larger) that crash while out of control are not instantly destroyed.
 GameOptionsInfo.option.expanded_kf_drive_damage.displayableName=(Unofficial) Damage individual K-F Drive components on K-F Drive Critical Hit
 GameOptionsInfo.option.expanded_kf_drive_damage.description=If a K-F Drive critical hit is taken, a random component is hit (per BattleSpace rules).
+GameOptionsInfo.option.unoff_adv_atmospheric_control.displayableName=(Unofficial) Old StratOps Advanced Atmospheric Control Rolls
+GameOptionsInfo.option.unoff_adv_atmospheric_control.description=Atmospheric control rolls only apply to hit damage above the damage threshold
 
 
 GameOptionsInfo.group.initiative.displayableName=Initiative Rules

megamek/src/megamek/common/Aero.java

@@ -1609,6 +1609,17 @@ public int getThresh(int loc) {
         return 0;
     }
 
+    @Override
+    public int getHighestThresh() {
+        int max = damThresh[0];
+        for (int i = 1; i < damThresh.length; i++) {
+            if (damThresh[i] > max) {
+                max = damThresh[i];
+            }
+        }
+        return max;
+    }
+
     /**
      * Determine if the unit can be repaired, or only harvested for spares.
      *

megamek/src/megamek/common/IAero.java

@@ -133,6 +133,8 @@ default int getClusterMods() {
 
     int getThresh(int loc);
 
+    int getHighestThresh();
+
     boolean wasCritThresh();
 
     void setCritThresh(boolean b);

megamek/src/megamek/common/LandAirMech.java

@@ -1692,6 +1692,20 @@ public int getThresh(int loc) {
         return getInternal(loc);
     }
 
+    /**
+     * @return the highest damage threshold for the LAM unit
+     */
+    @Override
+    public int getHighestThresh() {
+        int max = getThresh(0);
+        for (int i = 1; i < locations(); i++) {
+            if (getThresh(i) > max) {
+                max = getThresh(i);
+            }
+        }
+        return max;
+    }
+
     @Override
     public boolean wasCritThresh() {
         return critThresh;

megamek/src/megamek/common/options/GameOptions.java

@@ -269,6 +269,7 @@ public synchronized void initialize() {
         addOption(advAeroRules, OptionsConstants.ADVAERORULES_AERO_ARTILLERY_MUNITIONS, false);
         addOption(advAeroRules, OptionsConstants.ADVAERORULES_CRASHED_DROPSHIPS_SURVIVE, false);
         addOption(advAeroRules, OptionsConstants.ADVAERORULES_EXPANDED_KF_DRIVE_DAMAGE, false);
+        addOption(advAeroRules, OptionsConstants.UNOFF_ADV_ATMOSPHERIC_CONTROL, false);
 
         IBasicOptionGroup initiative = addGroup("initiative");
         addOption(initiative, OptionsConstants.INIT_INF_MOVE_EVEN, false);

megamek/src/megamek/common/options/OptionsConstants.java

@@ -218,6 +218,7 @@ public class OptionsConstants {
     public static final String UNOFF_BLIND_FIGHTER = "blind_fighter";
     public static final String UNOFF_SENSOR_GEEK = "sensor_geek";
     public static final String UNOFF_SMALL_PILOT = "small_pilot";
+    public static final String UNOFF_ADV_ATMOSPHERIC_CONTROL = "unoff_adv_atmospheric_control";
 
     // EDGE
     public static final String EDGE = "edge";

megamek/src/megamek/server/totalwarfare/TWGameManager.java

@@ -58,6 +58,7 @@
 import java.util.List;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 /**
  * Manages the Game and processes player actions.
@@ -19336,9 +19337,10 @@
                 }
             }
             if (entity.isAero() && entity.isAirborne() && !game.getBoard().inSpace()) {
-                // if this aero has any damage, add another roll to the list.
+                // check if aero unit meets conditions for control rolls and add to the list
                 if (entity.damageThisPhase > 0) {
-                    if (!getGame().getOptions().booleanOption(OptionsConstants.ADVAERORULES_ATMOSPHERIC_CONTROL)) {
+                    if (!getGame().getOptions().booleanOption(OptionsConstants.ADVAERORULES_ATMOSPHERIC_CONTROL)
+                          && !getGame().getOptions().booleanOption(OptionsConstants.UNOFF_ADV_ATMOSPHERIC_CONTROL)) {
                         int damMod = entity.damageThisPhase / 20;
                         PilotingRollData damPRD = new PilotingRollData(entity.getId(), damMod,
                                 entity.damageThisPhase + " damage +" + damMod);
@@ -19348,13 +19350,24 @@
                         }
                         getGame().addControlRoll(damPRD);
                     } else {
-                        // was the damage threshold exceeded this round?
-                        if (((IAero) entity).wasCritThresh()) {
+                        // was the damage threshold in a single location exceeded this round?
+                        if ((((IAero) entity).wasCritThresh())) {
                             PilotingRollData damThresh = new PilotingRollData(entity.getId(), 0,
-                                    "damage threshold exceeded");
+                                "damage threshold exceeded");
                             if (entity.hasQuirk(OptionsConstants.QUIRK_POS_EASY_PILOT)
-                                    && (entity.getCrew().getPiloting() > 3)) {
-                                damThresh.addModifier(-1, "easy to pilot");
+                                && (entity.getCrew().getPiloting() > 3)) {
+                              damThresh.addModifier(-1, "easy to pilot");
+                            }
+                            getGame().addControlRoll(damThresh);
+                        }
+                        if (getGame().getOptions().booleanOption(OptionsConstants.ADVAERORULES_ATMOSPHERIC_CONTROL)
+                            && entity.damageThisPhase > ((IAero) entity).getHighestThresh()) {
+                            // did the total damage this round exceed the unit's highest threshold?
+                            PilotingRollData damThresh = new PilotingRollData(entity.getId(), 0,
+                                "highest damage threshold exceeded");
+                            if (entity.hasQuirk(OptionsConstants.QUIRK_POS_EASY_PILOT)
+                                && (entity.getCrew().getPiloting() > 3)) {
+                              damThresh.addModifier(-1, "easy to pilot");
                             }
                             getGame().addControlRoll(damThresh);
                         }
@@ -20092,18 +20105,22 @@
             if (e.isUsingManAce()) {
                 target.addModifier(-1, "maneuvering ace");
             }
-            for (Enumeration<PilotingRollData> j = game.getControlRolls(); j.hasMoreElements(); ) {
-                final PilotingRollData modifier = j.nextElement();
-                if (modifier.getEntityId() != e.getId()) {
-                    continue;
-                }
-                // found a roll, add it
-                rolls.addElement(modifier);
-                if (reasons.length() > 0) {
-                    reasons.append("; ");
-                }
-                reasons.append(modifier.getCumulativePlainDesc());
-                target.append(modifier);
+            if (game.getOptions().booleanOption(OptionsConstants.ADVAERORULES_ATMOSPHERIC_CONTROL)) {
+                addControlWithAdvAtmospheric(e, rolls, reasons);
+            } else {
+                for (Enumeration<PilotingRollData> j = game.getControlRolls(); j.hasMoreElements(); ) {
+                    final PilotingRollData modifier = j.nextElement();
+                    if (modifier.getEntityId() != e.getId()) {
+                        continue;
+                    }
+                    // found a roll, add it
+                    rolls.addElement(modifier);
+                    if (!reasons.isEmpty()) {
+                        reasons.append("; ");
+                    }
+                    reasons.append(modifier.getCumulativePlainDesc());
+                    target.append(modifier);
+                  }
             }
             // any rolls needed?
             if (!rolls.isEmpty()) {
@@ -20269,6 +20286,54 @@
         return vReport;
     }
 
+    /**
+     * Processes pending control roll events, merging triggers that would be multiple rolls in standard
+     * rules but are combined into a single roll under the Advanced Atmospheric Control Rolls rule.
+     *
+     * @param e         The entity whose pending rolls are being processed
+     * @param rolls     List of rolls to be added to
+     * @param reasons   Text representing the reason for the rolls
+     */
+    void addControlWithAdvAtmospheric(Entity e, Vector<PilotingRollData> rolls, StringBuilder reasons) {
+        // The August 2024 errata changed this rule to only trigger one control roll per
+        // round regardless of how many crits or thresholds occurred. As a result, the rolls
+        // need to be combined here at the end phase because not all the information is known
+        // when the individual rolls are first added throughout the round and previously added
+        // rolls can't easily be modified.
+        PilotingRollData atmosphericControlRoll = null;
+        for (Enumeration<PilotingRollData> j = game.getControlRolls(); j.hasMoreElements(); ) {
+            final PilotingRollData modifier = j.nextElement();
+            if (modifier.getEntityId() != e.getId()) {
+                continue;
+            }
+            if (Stream.of("threshold", "avionics hit", "critical hit").anyMatch(s -> modifier.getDesc().contains(s))) {
+                if (atmosphericControlRoll == null) {
+                    atmosphericControlRoll = modifier;
+                } else {
+                    // Modify the description of the pending atmospheric control roll instead of adding another one
+                    if (!reasons.isEmpty()) {
+                        reasons.append("; ");
+                    }
+                    reasons.append(modifier.getPlainDesc());
+                }
+            } else {
+                // Not an atmospheric control roll under the new rules, so treat normally
+                rolls.addElement(modifier);
+                if (!reasons.isEmpty()) {
+                    reasons.append("; ");
+                }
+                reasons.append(modifier.getPlainDesc());
+              }
+        }
+        if (atmosphericControlRoll != null) {
+            rolls.addElement(atmosphericControlRoll);
+            if (!reasons.isEmpty()) {
+                reasons.append("; ");
+            }
+            reasons.append(atmosphericControlRoll.getPlainDesc());
+        }
+    }
+
     /**
      * Check all aircraft that may have used internal bomb bays for incidental explosions
      * caused by ground fire.

megamek/unittests/megamek/server/totalwarfare/TWGameManagerTest.java

@@ -0,0 +1,92 @@
+package megamek.server.totalwarfare;
+
+import megamek.common.*;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.Vector;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TWGameManagerTest {
+    private Player player;
+    private TWGameManager gameManager;
+    private Game game;
+
+    @BeforeAll
+    static void before() {
+        EquipmentType.initializeTypes();
+    }
+
+    @BeforeEach
+    void setUp() {
+        player = new Player(0, "Test");
+        gameManager = new TWGameManager();
+        game = gameManager.getGame();
+        game.addPlayer(0, player);
+    }
+
+    @Test
+    void testAddControlWithAdvAtmosphericMergesIntoOneRollAero() {
+        AeroSpaceFighter aero = new AeroSpaceFighter();
+        game.addEntity(aero);
+        Vector<PilotingRollData> rolls = new Vector<>();
+        StringBuilder reasons = new StringBuilder();
+
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "critical hit"));
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "avionics hit"));
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "threshold"));
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "highest damage threshold exceeded"));
+        gameManager.addControlWithAdvAtmospheric(aero, rolls, reasons);
+        assertEquals(1, rolls.size());
+    }
+
+    @Test
+    void testAddControlWithAdvAtmosphericIncludesAllReasonsAero() {
+        AeroSpaceFighter aero = new AeroSpaceFighter();
+        game.addEntity(aero);
+        Vector<PilotingRollData> rolls = new Vector<>();
+        StringBuilder reasons = new StringBuilder();
+
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "critical hit"));
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "avionics hit"));
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "threshold"));
+        game.addControlRoll(new PilotingRollData(aero.getId(), 0, "highest damage threshold exceeded"));
+        gameManager.addControlWithAdvAtmospheric(aero, rolls, reasons);
+        assertTrue(reasons.toString().contains("critical hit"));
+        assertTrue(reasons.toString().contains("avionics hit"));
+        assertTrue(reasons.toString().contains("threshold"));
+        assertTrue(reasons.toString().contains("highest damage threshold exceeded"));
+    }
+
+    @Test
+    void testAddControlWithAdvAtmosphericMergesIntoOneRollLAM() {
+        LandAirMech mech = new LandAirMech(LandAirMech.GYRO_STANDARD, LandAirMech.COCKPIT_STANDARD, LandAirMech.LAM_STANDARD);
+        game.addEntity(mech);
+        Vector<PilotingRollData> rolls = new Vector<>();
+        StringBuilder reasons = new StringBuilder();
+
+        game.addControlRoll(new PilotingRollData(mech.getId(), 0, "avionics hit"));
+        game.addControlRoll(new PilotingRollData(mech.getId(), 0, "threshold"));
+        game.addControlRoll(new PilotingRollData(mech.getId(), 0, "highest damage threshold exceeded"));
+        gameManager.addControlWithAdvAtmospheric(mech, rolls, reasons);
+        assertEquals(1, rolls.size());
+    }
+
+    @Test
+    void testAddControlWithAdvAtmosphericIncludesAllReasonsLAM() {
+        LandAirMech mech = new LandAirMech(LandAirMech.GYRO_STANDARD, LandAirMech.COCKPIT_STANDARD, LandAirMech.LAM_STANDARD);
+        game.addEntity(mech);
+        Vector<PilotingRollData> rolls = new Vector<>();
+        StringBuilder reasons = new StringBuilder();
+
+        game.addControlRoll(new PilotingRollData(mech.getId(), 0, "avionics hit"));
+        game.addControlRoll(new PilotingRollData(mech.getId(), 0, "threshold"));
+        game.addControlRoll(new PilotingRollData(mech.getId(), 0, "highest damage threshold exceeded"));
+        gameManager.addControlWithAdvAtmospheric(mech, rolls, reasons);
+        assertTrue(reasons.toString().contains("avionics hit"));
+        assertTrue(reasons.toString().contains("threshold"));
+        assertTrue(reasons.toString().contains("highest damage threshold exceeded"));
+    }
+}