From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: kickash32 Date: Mon, 19 Aug 2019 01:27:58 +0500 Subject: [PATCH] implement optional per player mob spawns diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java index e129794e5cbf5155a232966ef4ff534c0007f1d9..575f277a5d38ade7d70c632712ea895cde3bfaae 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -608,4 +608,12 @@ public class PaperWorldConfig { } } } + + public boolean perPlayerMobSpawns = false; + private void perPlayerMobSpawns() { + if (PaperConfig.version < 22) { + set("per-player-mob-spawns", Boolean.TRUE); + } + perPlayerMobSpawns = getBoolean("per-player-mob-spawns", true); + } } diff --git a/src/main/java/com/destroystokyo/paper/util/PooledHashSets.java b/src/main/java/com/destroystokyo/paper/util/PooledHashSets.java new file mode 100644 index 0000000000000000000000000000000000000000..11de56afaf059b00fa5bec293516bcdce7c4b2b9 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/util/PooledHashSets.java @@ -0,0 +1,241 @@ +package com.destroystokyo.paper.util; + +import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap; +import it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet; +import java.lang.ref.WeakReference; +import java.util.Iterator; + +/** @author Spottedleaf */ +public class PooledHashSets { + + // we really want to avoid that equals() check as much as possible... + protected final Object2ObjectOpenHashMap, PooledObjectLinkedOpenHashSet> mapPool = new Object2ObjectOpenHashMap<>(64, 0.25f); + + protected void decrementReferenceCount(final PooledObjectLinkedOpenHashSet current) { + if (current.referenceCount == 0) { + throw new IllegalStateException("Cannot decrement reference count for " + current); + } + if (current.referenceCount == -1 || --current.referenceCount > 0) { + return; + } + + this.mapPool.remove(current); + return; + } + + public PooledObjectLinkedOpenHashSet findMapWith(final PooledObjectLinkedOpenHashSet current, final E object) { + final PooledObjectLinkedOpenHashSet cached = current.getAddCache(object); + + if (cached != null) { + if (cached.referenceCount != -1) { + ++cached.referenceCount; + } + + decrementReferenceCount(current); + + return cached; + } + + if (!current.add(object)) { + return current; + } + + // we use get/put since we use a different key on put + PooledObjectLinkedOpenHashSet ret = this.mapPool.get(current); + + if (ret == null) { + ret = new PooledObjectLinkedOpenHashSet<>(current); + current.remove(object); + this.mapPool.put(ret, ret); + ret.referenceCount = 1; + } else { + if (ret.referenceCount != -1) { + ++ret.referenceCount; + } + current.remove(object); + } + + current.updateAddCache(object, ret); + + decrementReferenceCount(current); + return ret; + } + + // rets null if current.size() == 1 + public PooledObjectLinkedOpenHashSet findMapWithout(final PooledObjectLinkedOpenHashSet current, final E object) { + if (current.set.size() == 1) { + decrementReferenceCount(current); + return null; + } + + final PooledObjectLinkedOpenHashSet cached = current.getRemoveCache(object); + + if (cached != null) { + if (cached.referenceCount != -1) { + ++cached.referenceCount; + } + + decrementReferenceCount(current); + + return cached; + } + + if (!current.remove(object)) { + return current; + } + + // we use get/put since we use a different key on put + PooledObjectLinkedOpenHashSet ret = this.mapPool.get(current); + + if (ret == null) { + ret = new PooledObjectLinkedOpenHashSet<>(current); + current.add(object); + this.mapPool.put(ret, ret); + ret.referenceCount = 1; + } else { + if (ret.referenceCount != -1) { + ++ret.referenceCount; + } + current.add(object); + } + + current.updateRemoveCache(object, ret); + + decrementReferenceCount(current); + return ret; + } + + public static final class PooledObjectLinkedOpenHashSet implements Iterable { + + private static final WeakReference NULL_REFERENCE = new WeakReference(null); + + final ObjectLinkedOpenHashSet set; + int referenceCount; // -1 if special + int hash; // optimize hashcode + + // add cache + WeakReference lastAddObject = NULL_REFERENCE; + WeakReference> lastAddMap = NULL_REFERENCE; + + // remove cache + WeakReference lastRemoveObject = NULL_REFERENCE; + WeakReference> lastRemoveMap = NULL_REFERENCE; + + public PooledObjectLinkedOpenHashSet() { + this.set = new ObjectLinkedOpenHashSet<>(2, 0.6f); + } + + public PooledObjectLinkedOpenHashSet(final E single) { + this(); + this.referenceCount = -1; + this.add(single); + } + + public PooledObjectLinkedOpenHashSet(final PooledObjectLinkedOpenHashSet other) { + this.set = other.set.clone(); + this.hash = other.hash; + } + + // from https://github.com/Spottedleaf/ConcurrentUtil/blob/master/src/main/java/ca/spottedleaf/concurrentutil/util/IntegerUtil.java + // generated by https://github.com/skeeto/hash-prospector + static int hash0(int x) { + x *= 0x36935555; + x ^= x >>> 16; + return x; + } + + public PooledObjectLinkedOpenHashSet getAddCache(final E element) { + final E currentAdd = this.lastAddObject.get(); + + if (currentAdd == null || !(currentAdd == element || currentAdd.equals(element))) { + return null; + } + + final PooledObjectLinkedOpenHashSet map = this.lastAddMap.get(); + if (map == null || map.referenceCount == 0) { + // we need to ret null if ref count is zero as calling code will assume the map is in use + return null; + } + + return map; + } + + public PooledObjectLinkedOpenHashSet getRemoveCache(final E element) { + final E currentRemove = this.lastRemoveObject.get(); + + if (currentRemove == null || !(currentRemove == element || currentRemove.equals(element))) { + return null; + } + + final PooledObjectLinkedOpenHashSet map = this.lastRemoveMap.get(); + if (map == null || map.referenceCount == 0) { + // we need to ret null if ref count is zero as calling code will assume the map is in use + return null; + } + + return map; + } + + public void updateAddCache(final E element, final PooledObjectLinkedOpenHashSet map) { + this.lastAddObject = new WeakReference<>(element); + this.lastAddMap = new WeakReference<>(map); + } + + public void updateRemoveCache(final E element, final PooledObjectLinkedOpenHashSet map) { + this.lastRemoveObject = new WeakReference<>(element); + this.lastRemoveMap = new WeakReference<>(map); + } + + boolean add(final E element) { + boolean added = this.set.add(element); + + if (added) { + this.hash += hash0(element.hashCode()); + } + + return added; + } + + boolean remove(Object element) { + boolean removed = this.set.remove(element); + + if (removed) { + this.hash -= hash0(element.hashCode()); + } + + return removed; + } + + @Override + public Iterator iterator() { + return this.set.iterator(); + } + + @Override + public int hashCode() { + return this.hash; + } + + @Override + public boolean equals(final Object other) { + if (!(other instanceof PooledObjectLinkedOpenHashSet)) { + return false; + } + if (this.referenceCount == 0) { + return other == this; + } else { + if (other == this) { + // Unfortunately we are never equal to our own instance while in use! + return false; + } + return this.hash == ((PooledObjectLinkedOpenHashSet)other).hash && this.set.equals(((PooledObjectLinkedOpenHashSet)other).set); + } + } + + @Override + public String toString() { + return "PooledHashSet: size: " + this.set.size() + ", reference count: " + this.referenceCount + ", hash: " + + this.hashCode() + ", identity: " + System.identityHashCode(this) + " map: " + this.set.toString(); + } + } +} diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java index f1bf847a498023ce8729315c6ec68f1d16cab822..a0ffdeaad5c375539857d6a5a94832216d09f024 100644 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java @@ -155,6 +155,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider private final Long2LongMap chunkSaveCooldowns; private final Queue unloadQueue; int viewDistance; + public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerMobDistanceMap; // Paper // CraftBukkit start - recursion-safe executor for Chunk loadCallback() and unloadCallback() public final CallbackExecutor callbackExecutor = new CallbackExecutor(); @@ -184,16 +185,31 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider int chunkX = MCUtil.getChunkCoordinate(player.getX()); int chunkZ = MCUtil.getChunkCoordinate(player.getZ()); // Note: players need to be explicitly added to distance maps before they can be updated + // Paper start - per player mob spawning + if (this.playerMobDistanceMap != null) { + this.playerMobDistanceMap.add(player, chunkX, chunkZ, this.distanceManager.getSimulationDistance()); + } + // Paper end - per player mob spawning } void removePlayerFromDistanceMaps(ServerPlayer player) { + // Paper start - per player mob spawning + if (this.playerMobDistanceMap != null) { + this.playerMobDistanceMap.remove(player); + } + // Paper end - per player mob spawning } void updateMaps(ServerPlayer player) { int chunkX = MCUtil.getChunkCoordinate(player.getX()); int chunkZ = MCUtil.getChunkCoordinate(player.getZ()); // Note: players need to be explicitly added to distance maps before they can be updated + // Paper start - per player mob spawning + if (this.playerMobDistanceMap != null) { + this.playerMobDistanceMap.update(player, chunkX, chunkZ, this.distanceManager.getSimulationDistance()); + } + // Paper end - per player mob spawning } // Paper end // Paper start @@ -268,6 +284,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider this.dataRegionManager = new io.papermc.paper.chunk.SingleThreadChunkRegionManager(this.level, 2, (1.0 / 3.0), 1, 6, "Data", DataRegionData::new, DataRegionSectionData::new); this.regionManagers.add(this.dataRegionManager); // Paper end + this.playerMobDistanceMap = this.level.paperConfig.perPlayerMobSpawns ? new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets) : null; // Paper } protected ChunkGenerator generator() { @@ -285,6 +302,31 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider }); } + // Paper start + public void updatePlayerMobTypeMap(Entity entity) { + if (!this.level.paperConfig.perPlayerMobSpawns) { + return; + } + int index = entity.getType().getCategory().ordinal(); + + final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet inRange = this.playerMobDistanceMap.getObjectsInRange(entity.chunkPosition()); + if (inRange == null) { + return; + } + final Object[] backingSet = inRange.getBackingSet(); + for (int i = 0; i < backingSet.length; i++) { + if (!(backingSet[i] instanceof final ServerPlayer player)) { + continue; + } + ++player.mobCounts[index]; + } + } + + public int getMobCountNear(ServerPlayer entityPlayer, net.minecraft.world.entity.MobCategory mobCategory) { + return entityPlayer.mobCounts[mobCategory.ordinal()]; + } + // Paper end + private static double euclideanDistanceSquared(ChunkPos pos, Entity entity) { double d0 = (double) SectionPos.sectionToBlockCoord(pos.x, 8); double d1 = (double) SectionPos.sectionToBlockCoord(pos.z, 8); diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java index 1e066a35b53b1f71a0e6376a22d51fc4c0a412dc..6228f2f67541da62b0ae093de987662db9643740 100644 --- a/src/main/java/net/minecraft/server/level/DistanceManager.java +++ b/src/main/java/net/minecraft/server/level/DistanceManager.java @@ -326,6 +326,12 @@ public abstract class DistanceManager { } + // Paper start + public int getSimulationDistance() { + return this.simulationDistance; + } + // Paper end + public int getNaturalSpawnChunkCount() { this.naturalSpawnChunkCounter.runAllUpdates(); return this.naturalSpawnChunkCounter.chunks.size(); diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java index 98f3b91605ecf81538659220354f78d4de9d203e..39b4ddbb87e6ec2e8103445625ff0d7d368bd513 100644 --- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java +++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java @@ -907,7 +907,18 @@ public class ServerChunkCache extends ChunkSource { gameprofilerfiller.push("naturalSpawnCount"); this.level.timings.countNaturalMobs.startTiming(); // Paper - timings int l = this.distanceManager.getNaturalSpawnChunkCount(); - NaturalSpawner.SpawnState spawnercreature_d = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, new LocalMobCapCalculator(this.chunkMap)); + // Paper start - per player mob spawning + NaturalSpawner.SpawnState spawnercreature_d; // moved down + if ((this.spawnFriendlies || this.spawnEnemies) && this.chunkMap.playerMobDistanceMap != null) { // don't count mobs when animals and monsters are disabled + // re-set mob counts + for (ServerPlayer player : this.level.players) { + Arrays.fill(player.mobCounts, 0); + } + spawnercreature_d = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, null, true); + } else { + spawnercreature_d = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, this.chunkMap.playerMobDistanceMap == null ? new LocalMobCapCalculator(this.chunkMap) : null, false); + } + // Paper end this.level.timings.countNaturalMobs.stopTiming(); // Paper - timings this.lastSpawnState = spawnercreature_d; diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java index 910991b0c153a74d35cf097e0ac5a02559729a2e..9815bb19b8210493d549bed5b2baa95331d71469 100644 --- a/src/main/java/net/minecraft/server/level/ServerPlayer.java +++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java @@ -225,6 +225,11 @@ public class ServerPlayer extends Player { public boolean queueHealthUpdatePacket = false; public net.minecraft.network.protocol.game.ClientboundSetHealthPacket queuedHealthUpdatePacket; // Paper end + // Paper start - mob spawning rework + public static final int MOBCATEGORY_TOTAL_ENUMS = net.minecraft.world.entity.MobCategory.values().length; + public final int[] mobCounts = new int[MOBCATEGORY_TOTAL_ENUMS]; // Paper + public final com.destroystokyo.paper.util.PooledHashSets.PooledObjectLinkedOpenHashSet cachedSingleMobDistanceMap; + // Paper end // CraftBukkit start public String displayName; @@ -315,6 +320,7 @@ public class ServerPlayer extends Player { this.adventure$displayName = net.kyori.adventure.text.Component.text(this.getScoreboardName()); // Paper this.bukkitPickUpLoot = true; this.maxHealthCache = this.getMaxHealth(); + this.cachedSingleMobDistanceMap = new com.destroystokyo.paper.util.PooledHashSets.PooledObjectLinkedOpenHashSet<>(this); // Paper } // Yes, this doesn't match Vanilla, but it's the best we can do for now. diff --git a/src/main/java/net/minecraft/world/level/NaturalSpawner.java b/src/main/java/net/minecraft/world/level/NaturalSpawner.java index 474dc6302d2b0f8c629b2e1f6de9d4ba6faf398b..1622450b53e0f0f48c3ca107e4d705b4ad29dadf 100644 --- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java +++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java @@ -67,7 +67,13 @@ public final class NaturalSpawner { private NaturalSpawner() {} + // Paper start - add countMobs parameter public static NaturalSpawner.SpawnState createState(int spawningChunkCount, Iterable entities, NaturalSpawner.ChunkGetter chunkSource, LocalMobCapCalculator localmobcapcalculator) { + return createState(spawningChunkCount, entities, chunkSource, localmobcapcalculator, false); + } + + public static NaturalSpawner.SpawnState createState(int spawningChunkCount, Iterable entities, NaturalSpawner.ChunkGetter chunkSource, LocalMobCapCalculator localmobcapcalculator, boolean countMobs) { + // Paper end PotentialCalculator spawnercreatureprobabilities = new PotentialCalculator(); Object2IntOpenHashMap object2intopenhashmap = new Object2IntOpenHashMap(); Iterator iterator = entities.iterator(); @@ -103,11 +109,16 @@ public final class NaturalSpawner { spawnercreatureprobabilities.addCharge(entity.blockPosition(), biomesettingsmobs_b.getCharge()); } - if (entity instanceof Mob) { + if (localmobcapcalculator != null && entity instanceof Mob) { // Paper localmobcapcalculator.addMob(chunk.getPos(), enumcreaturetype); } object2intopenhashmap.addTo(enumcreaturetype, 1); + // Paper start + if (countMobs) { + chunk.level.getChunkSource().chunkMap.updatePlayerMobTypeMap(entity); + } + // Paper end }); } } @@ -142,13 +153,37 @@ public final class NaturalSpawner { continue; } - if ((spawnAnimals || !enumcreaturetype.isFriendly()) && (spawnMonsters || enumcreaturetype.isFriendly()) && (rareSpawn || !enumcreaturetype.isPersistent()) && info.canSpawnForCategory(enumcreaturetype, chunk.getPos(), limit)) { + // Paper start - only allow spawns upto the limit per chunk and update count afterwards + int currEntityCount = info.mobCategoryCounts.getInt(enumcreaturetype); + int k1 = limit * info.getSpawnableChunkCount() / NaturalSpawner.MAGIC_NUMBER; + int difference = k1 - currEntityCount; + + if (world.paperConfig.perPlayerMobSpawns) { + int minDiff = Integer.MAX_VALUE; + final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet inRange = world.getChunkSource().chunkMap.playerMobDistanceMap.getObjectsInRange(chunk.getPos()); + if (inRange != null) { + final Object[] backingSet = inRange.getBackingSet(); + for (int k = 0; k < backingSet.length; k++) { + if (!(backingSet[k] instanceof final net.minecraft.server.level.ServerPlayer player)) { + continue; + } + minDiff = Math.min(limit - world.getChunkSource().chunkMap.getMobCountNear(player, enumcreaturetype), minDiff); + } + } + difference = (minDiff == Integer.MAX_VALUE) ? 0 : minDiff; + } + if ((spawnAnimals || !enumcreaturetype.isFriendly()) && (spawnMonsters || enumcreaturetype.isFriendly()) && (rareSpawn || !enumcreaturetype.isPersistent()) && difference > 0) { + // Paper end // CraftBukkit end Objects.requireNonNull(info); NaturalSpawner.SpawnPredicate spawnercreature_c = info::canSpawn; Objects.requireNonNull(info); - NaturalSpawner.spawnCategoryForChunk(enumcreaturetype, world, chunk, spawnercreature_c, info::afterSpawn); + // Paper start + int spawnCount = NaturalSpawner.spawnCategoryForChunk(enumcreaturetype, world, chunk, spawnercreature_c, info::afterSpawn, + difference, world.paperConfig.perPlayerMobSpawns ? world.getChunkSource().chunkMap::updatePlayerMobTypeMap : null); + info.mobCategoryCounts.mergeInt(enumcreaturetype, spawnCount, Integer::sum); + // Paper end } } @@ -156,12 +191,18 @@ public final class NaturalSpawner { world.getProfiler().pop(); } + // Paper start - add parameters and int ret type public static void spawnCategoryForChunk(MobCategory group, ServerLevel world, LevelChunk chunk, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner) { + spawnCategoryForChunk(group, world, chunk, checker, runner, Integer.MAX_VALUE, null); + } + public static int spawnCategoryForChunk(MobCategory group, ServerLevel world, LevelChunk chunk, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner, int maxSpawns, Consumer trackEntity) { + // Paper end - add parameters and int ret type BlockPos blockposition = NaturalSpawner.getRandomPosWithin(world, chunk); if (blockposition.getY() >= world.getMinBuildHeight() + 1) { - NaturalSpawner.spawnCategoryForPosition(group, world, chunk, blockposition, checker, runner); + return NaturalSpawner.spawnCategoryForPosition(group, world, chunk, blockposition, checker, runner, maxSpawns, trackEntity); // Paper } + return 0; // Paper } @VisibleForDebug @@ -172,15 +213,21 @@ public final class NaturalSpawner { }); } + // Paper start - add maxSpawns parameter and return spawned mobs public static void spawnCategoryForPosition(MobCategory group, ServerLevel world, ChunkAccess chunk, BlockPos pos, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner) { + spawnCategoryForPosition(group, world,chunk, pos, checker, runner, Integer.MAX_VALUE, null); + } + public static int spawnCategoryForPosition(MobCategory group, ServerLevel world, ChunkAccess chunk, BlockPos pos, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner, int maxSpawns, Consumer trackEntity) { + // Paper end - add maxSpawns parameter and return spawned mobs StructureFeatureManager structuremanager = world.structureFeatureManager(); ChunkGenerator chunkgenerator = world.getChunkSource().getGenerator(); int i = pos.getY(); BlockState iblockdata = world.getBlockStateIfLoadedAndInBounds(pos); // Paper - don't load chunks for mob spawn + int j = 0; // Paper - moved up if (iblockdata != null && !iblockdata.isRedstoneConductor(chunk, pos)) { // Paper - don't load chunks for mob spawn BlockPos.MutableBlockPos blockposition_mutableblockposition = new BlockPos.MutableBlockPos(); - int j = 0; + //int j = 0; // Paper - moved up int k = 0; while (k < 3) { @@ -222,14 +269,14 @@ public final class NaturalSpawner { // Paper start Boolean doSpawning = isValidSpawnPostitionForType(world, group, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2); if (doSpawning == null) { - return; + return j; // Paper } if (doSpawning && checker.test(biomesettingsmobs_c.type, blockposition_mutableblockposition, chunk)) { // Paper end Mob entityinsentient = NaturalSpawner.getMobForSpawn(world, biomesettingsmobs_c.type); if (entityinsentient == null) { - return; + return j; // Paper } entityinsentient.moveTo(d0, (double) i, d1, world.random.nextFloat() * 360.0F, 0.0F); @@ -241,10 +288,15 @@ public final class NaturalSpawner { ++j; ++k1; runner.run(entityinsentient, chunk); + // Paper start + if (trackEntity != null) { + trackEntity.accept(entityinsentient); + } + // Paper end } // CraftBukkit end - if (j >= entityinsentient.getMaxSpawnClusterSize()) { - return; + if (j >= entityinsentient.getMaxSpawnClusterSize() || j >= maxSpawns) { // Paper + return j; // Paper } if (entityinsentient.isMaxGroupSizeReached(k1)) { @@ -266,6 +318,7 @@ public final class NaturalSpawner { } } + return j; // Paper } private static boolean isRightDistanceToPlayerAndSpawnPoint(ServerLevel world, ChunkAccess chunk, BlockPos.MutableBlockPos pos, double squaredDistance) { @@ -551,7 +604,7 @@ public final class NaturalSpawner { MobCategory enumcreaturetype = entitytypes.getCategory(); this.mobCategoryCounts.addTo(enumcreaturetype, 1); - this.localMobCapCalculator.addMob(new ChunkPos(blockposition), enumcreaturetype); + if (this.localMobCapCalculator != null) this.localMobCapCalculator.addMob(new ChunkPos(blockposition), enumcreaturetype); // Paper } public int getSpawnableChunkCount() { @@ -567,6 +620,7 @@ public final class NaturalSpawner { int i = limit * this.spawnableChunkCount / NaturalSpawner.MAGIC_NUMBER; // CraftBukkit end + if (this.localMobCapCalculator == null) return this.mobCategoryCounts.getInt(enumcreaturetype) < i; // Paper return this.mobCategoryCounts.getInt(enumcreaturetype) >= i ? false : this.localMobCapCalculator.canSpawn(enumcreaturetype, chunkcoordintpair); } }