修复部分情况下DamageModifier未正确初始化的问题，优化初始数据同步方法

src/main/java/com/atsuishio/superbwarfare/data/vehicle/VehicleData.java

@@ -13,11 +13,13 @@ import org.jetbrains.annotations.NotNull;
 public class VehicleData {
 
     public final String id;
-    private final DefaultVehicleData data;
+    public final DefaultVehicleData data;
+    public final VehicleEntity vehicle;
 
     private VehicleData(VehicleEntity entity) {
         this.id = EntityType.getKey(entity.getType()).toString();
         this.data = VehicleDataTool.vehicleData.getOrDefault(id, new DefaultVehicleData());
+        this.vehicle = entity;
     }
 
     public static final LoadingCache<VehicleEntity, VehicleData> dataCache = CacheBuilder.newBuilder()
@@ -60,21 +62,29 @@ public class VehicleData {
         return data.mass;
     }
 
+    public static final LoadingCache<String, DamageModifier> damageModifiers = CacheBuilder.newBuilder()
+            .build(new CacheLoader<>() {
+                public @NotNull DamageModifier load(@NotNull String id) {
+                    var data = VehicleDataTool.vehicleData.getOrDefault(id, new DefaultVehicleData());
+                    var modifier = new DamageModifier();
+
+                    if (data.applyDefaultDamageModifiers) {
+                        modifier.immuneTo(EntityType.POTION)
+                                .immuneTo(EntityType.AREA_EFFECT_CLOUD)
+                                .immuneTo(DamageTypes.FALL)
+                                .immuneTo(DamageTypes.DROWN)
+                                .immuneTo(DamageTypes.DRAGON_BREATH)
+                                .immuneTo(DamageTypes.WITHER)
+                                .immuneTo(DamageTypes.WITHER_SKULL)
+                                .reduce(5, ModDamageTypes.VEHICLE_STRIKE);
+                    }
+
+                    return modifier.addAll(data.damageModifiers);
+                }
+            });
+
     public DamageModifier damageModifier() {
-        var modifier = new DamageModifier();
+        return damageModifiers.getUnchecked(id);
-
-        if (data.applyDefaultDamageModifiers) {
-            modifier.immuneTo(EntityType.POTION)
-                    .immuneTo(EntityType.AREA_EFFECT_CLOUD)
-                    .immuneTo(DamageTypes.FALL)
-                    .immuneTo(DamageTypes.DROWN)
-                    .immuneTo(DamageTypes.DRAGON_BREATH)
-                    .immuneTo(DamageTypes.WITHER)
-                    .immuneTo(DamageTypes.WITHER_SKULL)
-                    .reduce(5, ModDamageTypes.VEHICLE_STRIKE);
-        }
-
-        return modifier.addAll(data.damageModifiers);
     }
 
 }

src/main/java/com/atsuishio/superbwarfare/data/vehicle/VehicleDataTool.java

@@ -24,6 +24,7 @@ public class VehicleDataTool {
     public static void initJsonData(ResourceManager manager) {
         vehicleData.clear();
         VehicleData.dataCache.invalidateAll();
+        VehicleData.damageModifiers.invalidateAll();
 
         for (var entry : manager.listResources(VEHICLE_DATA_FOLDER, file -> file.getPath().endsWith(".json")).entrySet()) {
             var attribute = entry.getValue();
@@ -53,6 +54,11 @@ public class VehicleDataTool {
     @SubscribeEvent
     public static void onPlayerLogin(PlayerEvent.PlayerLoggedInEvent event) {
         if (event.getEntity() instanceof ServerPlayer player) {
+            var server = player.getServer();
+            if (server != null && server.isSingleplayer()) {
+                return;
+            }
+
             PacketDistributor.sendToPlayer(player, VehiclesDataMessage.create());
         }
     }
@@ -66,6 +72,10 @@ public class VehicleDataTool {
     public static void onDataPackSync(OnDatapackSyncEvent event) {
         initJsonData(event.getPlayerList().getServer().getResourceManager());
 
+        if (event.getPlayerList().getServer().isSingleplayer()) {
+            return;
+        }
+
         event.getRelevantPlayers().forEach(player -> PacketDistributor.sendToPlayer(player, VehiclesDataMessage.create()));
     }
 }

src/main/java/com/atsuishio/superbwarfare/entity/vehicle/base/VehicleEntity.java

@@ -403,7 +403,7 @@ public abstract class VehicleEntity extends Entity {
         if (source.is(DamageTypes.CACTUS) || source.is(DamageTypes.SWEET_BERRY_BUSH) || source.is(DamageTypes.IN_WALL))
             return false;
         // 计算减伤后的伤害
-        float computedAmount = damageModifier.compute(source, amount);
+        float computedAmount = getDamageModifier().compute(source, amount);
         this.crash = source.is(ModDamageTypes.VEHICLE_STRIKE);
 
         if (source.getEntity() != null) {
@@ -444,8 +444,6 @@ public abstract class VehicleEntity extends Entity {
         return true;
     }
 
-    protected final DamageModifier damageModifier = this.getDamageModifier();
-
     /**
      * 控制载具伤害免疫
      *

src/main/java/com/atsuishio/superbwarfare/entity/vehicle/damage/DamageModifier.java

@@ -218,8 +218,6 @@ public class DamageModifier {
         return this;
     }
 
-    private final List<DamageModify> combinedList = new ArrayList<>();
-
     /**
      * 计算减伤后的伤害值
      *
@@ -228,14 +226,14 @@ public class DamageModifier {
      * @return 减伤后的伤害值
      */
     public float compute(DamageSource source, float damage) {
-        if (combinedList.isEmpty()) {
+        var list = new ArrayList<DamageModify>();
-            // 计算优先级 免疫 > 固定减伤 > 乘
-            combinedList.addAll(immuneList);
-            combinedList.addAll(reduceList);
-            combinedList.addAll(multiplyList);
-        }
 
-        for (DamageModify damageModify : combinedList) {
+        // 计算优先级 免疫 > 固定减伤 > 乘
+        list.addAll(immuneList);
+        list.addAll(reduceList);
+        list.addAll(multiplyList);
+
+        for (DamageModify damageModify : list) {
             if (damageModify.match(source)) {
                 damage = damageModify.compute(damage);
 

src/main/java/com/atsuishio/superbwarfare/tools/GunsTool.java

@@ -62,6 +62,11 @@ public class GunsTool {
     @SubscribeEvent
     public static void onPlayerLogin(PlayerEvent.PlayerLoggedInEvent event) {
         if (event.getEntity() instanceof ServerPlayer player) {
+            var server = player.getServer();
+            if (server != null && server.isSingleplayer()) {
+                return;
+            }
+
             PacketDistributor.sendToPlayer(player, GunsDataMessage.create());
         }
     }
@@ -75,6 +80,10 @@ public class GunsTool {
     public static void onDataPackSync(OnDatapackSyncEvent event) {
         initJsonData(event.getPlayerList().getServer().getResourceManager());
 
+        if (event.getPlayerList().getServer().isSingleplayer()) {
+            return;
+        }
+
         event.getRelevantPlayers().forEach(player -> PacketDistributor.sendToPlayer(player, GunsDataMessage.create()));
     }