生成条件和json

（高度限制了，还差白天也能生成

src/main/java/org/confluence/mod/entity/BloodCrawler/BloodCrawler.java

@@ -1,6 +1,10 @@
 package org.confluence.mod.entity.BloodCrawler;
 
+import net.minecraft.core.BlockPos;
+import net.minecraft.util.RandomSource;
 import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.Mob;
+import net.minecraft.world.entity.MobSpawnType;
 import net.minecraft.world.entity.ai.attributes.AttributeSupplier;
 import net.minecraft.world.entity.ai.attributes.Attributes;
 import net.minecraft.world.entity.ai.goal.*;
@@ -10,6 +14,7 @@
 import net.minecraft.world.entity.monster.Spider;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.level.Level;
+import net.minecraft.world.level.LevelAccessor;
 import org.confluence.mod.entity.boss.TerraBossBase;
 import software.bernie.geckolib.animatable.GeoEntity;
 import software.bernie.geckolib.constant.DataTickets;
@@ -56,10 +61,25 @@ public static AttributeSupplier.Builder createAttributes() {
             .add(Attributes.SPAWN_REINFORCEMENTS_CHANCE, 0.01)  // 召唤物品的几率
             .add(Attributes.KNOCKBACK_RESISTANCE, 0.5);     // 击退抗性
     }
+    public static boolean checkBloodCrawlerSpawn(EntityType<? extends Mob> type, LevelAccessor pLevel, MobSpawnType pSpawnType, BlockPos pPos, RandomSource pRandom) {
+        if (!(pLevel instanceof Level level)) {
+            return false; // 如果 pLevel 不是 Level 的实例，返回 false
+        }
 
+        if (!checkMobSpawnRules(type, pLevel, pSpawnType, pPos, pRandom)) {
+            return false; // 如果不满足基本生成规则，返回 false
+        }
 
+        int y = pPos.getY();
+        if (y >= 260) {
+            return false; // 不能生成在 y = 260 或更高的位置
+        }
 
-    private final AnimatableInstanceCache cache = GeckoLibUtil.createInstanceCache(this);
+        return true;
+    }
+
+
+        private final AnimatableInstanceCache cache = GeckoLibUtil.createInstanceCache(this);
     @Override
     public AnimatableInstanceCache getAnimatableInstanceCache() {
         return cache;

src/main/java/org/confluence/mod/event/ModEvents.java

@@ -166,6 +166,7 @@ public static void spawnPlacementRegister(SpawnPlacementRegisterEvent event) {
         event.register(ModEntities.BLACK_SLIME.get(), SpawnPlacements.Type.ON_GROUND, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, BaseSlime::checkSlimeSpawn, SpawnPlacementRegisterEvent.Operation.REPLACE);
 
         event.register(ModEntities.DEMON_EYE.get(), SpawnPlacements.Type.ON_GROUND, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, DemonEye::checkDemonEyeSpawn, SpawnPlacementRegisterEvent.Operation.REPLACE);
+        event.register(ModEntities.BLOOD_CRAWLER.get(), SpawnPlacements.Type.ON_GROUND, Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, BloodCrawler::checkBloodCrawlerSpawn, SpawnPlacementRegisterEvent.Operation.REPLACE);
     }
 
     @SubscribeEvent

src/main/resources/data/confluence/forge/biome_modifier/mob_spawner/blood_crawler.json

@@ -0,0 +1,12 @@
+{
+    "type": "forge:add_spawns",
+    "biomes": [
+        "confluence:tr_crimson"
+    ],
+    "spawners": {
+        "type": "confluence:blood_crawler",
+        "weight": 60,
+        "minCount": 1,
+        "maxCount": 1
+    }
+}

src/main/resources/data/confluence/loot_tables/entities/blood_crawler.json

@@ -0,0 +1,29 @@
+{
+  "type": "minecraft:entity",
+  "pools": [
+    {
+      "rolls": 1,
+      "entries": [
+        {
+          "type": "minecraft:item",
+          "name": "confluence:vertebra",
+          "weight": 33,
+          "functions": [
+            {
+              "function": "set_count",
+              "count": {
+                "min": 1,
+                "max": 1
+              }
+            }
+          ]
+        },
+        {
+          "type": "minecraft:empty",
+          "weight": 67
+        }
+      ]
+    }
+  ],
+  "random_sequence": "confluence:entity/blood_crawler"
+}