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path: root/patches/server/0682-add-per-world-spawn-limits.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: chase <chasewhip20@gmail.com>
Date: Wed, 2 Dec 2020 22:43:39 -0800
Subject: [PATCH] add per world spawn limits

Taken from #2982. Credit to Chasewhip8

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index e6935a01c648773c83f0d1ad2ba0fc9e9e169d6c..3831ac4a373009ef2c06fd329459cd84b6329003 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -53,6 +53,11 @@ public class PaperWorldConfig {
 
             set("despawn-ranges.soft", null);
             set("despawn-ranges.hard", null);
+
+            set("spawn-limits.monsters", null);
+            set("spawn-limits.animals", null);
+            set("spawn-limits.water-animals", null);
+            set("spawn-limits.water-ambient", null);
         }
 
         if (needsSave) {
@@ -688,6 +693,21 @@ public class PaperWorldConfig {
         zombieVillagerInfectionChance = getDouble("zombie-villager-infection-chance", zombieVillagerInfectionChance);
     }
 
+    public Reference2IntMap<MobCategory> perWorldSpawnLimits = new Reference2IntOpenHashMap<>(net.minecraft.world.level.NaturalSpawner.SPAWNING_CATEGORIES.length);
+    private void perWorldSpawnLimits() {
+        perWorldSpawnLimits.defaultReturnValue(-1);
+        if (PaperConfig.version < 24) {
+            // ambient category already had correct name
+            perWorldSpawnLimits.put(MobCategory.MONSTER, getInt("spawn-limits.monsters", -1, false));
+            perWorldSpawnLimits.put(MobCategory.CREATURE, getInt("spawn-limits.animals", -1, false));
+            perWorldSpawnLimits.put(MobCategory.WATER_CREATURE, getInt("spawn-limits.water-animals", -1, false));
+            perWorldSpawnLimits.put(MobCategory.WATER_AMBIENT, getInt("spawn-limits.water-ambient", -1, false));
+        }
+        for (MobCategory value : net.minecraft.world.level.NaturalSpawner.SPAWNING_CATEGORIES) {
+            perWorldSpawnLimits.put(value, getInt("spawn-limits." + value.getName(), perWorldSpawnLimits.getInt(value)));
+        }
+    }
+
     public int lightQueueSize = 20;
     private void lightQueueSize() {
         lightQueueSize = getInt("light-queue-size", lightQueueSize);
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 2e938d257de3df9ce571a6b850fc1a5ca5790cf7..b4a1346eb90864c1eeb46b22a61f3adcd352aa19 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -212,6 +212,14 @@ public class CraftWorld extends CraftRegionAccessor implements World {
         this.biomeProvider = biomeProvider;
 
         this.environment = env;
+        // Paper start - per world spawn limits
+        this.monsterSpawn = this.world.paperConfig.perWorldSpawnLimits.getInt(net.minecraft.world.entity.MobCategory.MONSTER);
+        this.animalSpawn = this.world.paperConfig.perWorldSpawnLimits.getInt(net.minecraft.world.entity.MobCategory.CREATURE);
+        this.waterAnimalSpawn = this.world.paperConfig.perWorldSpawnLimits.getInt(net.minecraft.world.entity.MobCategory.WATER_CREATURE);
+        this.waterAmbientSpawn = this.world.paperConfig.perWorldSpawnLimits.getInt(net.minecraft.world.entity.MobCategory.WATER_AMBIENT);
+        this.ambientSpawn = this.world.paperConfig.perWorldSpawnLimits.getInt(net.minecraft.world.entity.MobCategory.AMBIENT);
+        this.waterUndergroundCreatureSpawn = this.world.paperConfig.perWorldSpawnLimits.getInt(net.minecraft.world.entity.MobCategory.UNDERGROUND_WATER_CREATURE);
+        // Paper end
     }
 
     @Override