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PaperMC/paper-server/patches/sources/net/minecraft/world/level/NaturalSpawner.java.patch
Aikar 2cd6ace7ab Only count Natural Spawned mobs towards natural spawn mob limit 
This resolves the super common complaint about mobs not spawning.

This was ultimately a flaw in the vanilla count algorithim that allows
spawners and other misc mobs to count against the mob limit, which are
not bounded, and can prevent the entire world from spawning new.

I believe Bukkits changes around persistence may of actually made it
worse than vanilla.

This should fully solve all of the issues around it so that only natural
influences natural spawns.
2019-03-24 01:01:32 -04:00

195 lines
14 KiB
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--- a/net/minecraft/world/level/NaturalSpawner.java
+++ b/net/minecraft/world/level/NaturalSpawner.java
@@ -47,8 +47,13 @@
import net.minecraft.world.level.levelgen.structure.Structure;
import net.minecraft.world.level.levelgen.structure.structures.NetherFortressStructure;
import net.minecraft.world.level.material.FluidState;
+import net.minecraft.world.level.storage.LevelData;
import net.minecraft.world.phys.Vec3;
import org.slf4j.Logger;
+import org.bukkit.craftbukkit.util.CraftSpawnCategory;
+import org.bukkit.entity.SpawnCategory;
+import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
+// CraftBukkit end
public final class NaturalSpawner {
@@ -82,6 +87,13 @@
MobCategory enumcreaturetype = entity.getType().getCategory();
if (enumcreaturetype != MobCategory.MISC) {
+ // Paper start - Only count natural spawns
+ if (!entity.level().paperConfig().entities.spawning.countAllMobsForSpawning &&
+ !(entity.spawnReason == org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.NATURAL ||
+ entity.spawnReason == org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.CHUNK_GEN)) {
+ continue;
+ }
+ // Paper end - Only count natural spawns
BlockPos blockposition = entity.blockPosition();
chunkSource.query(ChunkPos.asLong(blockposition), (chunk) -> {
@@ -107,15 +119,31 @@
return (Biome) chunk.getNoiseBiome(QuartPos.fromBlock(pos.getX()), QuartPos.fromBlock(pos.getY()), QuartPos.fromBlock(pos.getZ())).value();
}
- public static List<MobCategory> getFilteredSpawningCategories(NaturalSpawner.SpawnState info, boolean spawnAnimals, boolean spawnMonsters, boolean rare) {
+ // CraftBukkit start - add server
+ public static List<MobCategory> getFilteredSpawningCategories(NaturalSpawner.SpawnState spawnercreature_d, boolean flag, boolean flag1, boolean flag2, ServerLevel worldserver) {
+ LevelData worlddata = worldserver.getLevelData(); // CraftBukkit - Other mob type spawn tick rate
+ // CraftBukkit end
List<MobCategory> list = new ArrayList(NaturalSpawner.SPAWNING_CATEGORIES.length);
MobCategory[] aenumcreaturetype = NaturalSpawner.SPAWNING_CATEGORIES;
int i = aenumcreaturetype.length;
for (int j = 0; j < i; ++j) {
MobCategory enumcreaturetype = aenumcreaturetype[j];
+ // CraftBukkit start - Use per-world spawn limits
+ boolean spawnThisTick = true;
+ int limit = enumcreaturetype.getMaxInstancesPerChunk();
+ SpawnCategory spawnCategory = CraftSpawnCategory.toBukkit(enumcreaturetype);
+ if (CraftSpawnCategory.isValidForLimits(spawnCategory)) {
+ spawnThisTick = worldserver.ticksPerSpawnCategory.getLong(spawnCategory) != 0 && worlddata.getGameTime() % worldserver.ticksPerSpawnCategory.getLong(spawnCategory) == 0;
+ limit = worldserver.getWorld().getSpawnLimit(spawnCategory);
+ }
- if ((spawnAnimals || !enumcreaturetype.isFriendly()) && (spawnMonsters || enumcreaturetype.isFriendly()) && (rare || !enumcreaturetype.isPersistent()) && info.canSpawnForCategoryGlobal(enumcreaturetype)) {
+ if (!spawnThisTick || limit == 0) {
+ continue;
+ }
+
+ if ((flag || !enumcreaturetype.isFriendly()) && (flag1 || enumcreaturetype.isFriendly()) && (flag2 || !enumcreaturetype.isPersistent()) && spawnercreature_d.canSpawnForCategoryGlobal(enumcreaturetype, limit)) {
+ // CraftBukkit end
list.add(enumcreaturetype);
}
}
@@ -164,9 +192,9 @@
StructureManager structuremanager = world.structureManager();
ChunkGenerator chunkgenerator = world.getChunkSource().getGenerator();
int i = pos.getY();
- BlockState iblockdata = chunk.getBlockState(pos);
+ BlockState iblockdata = world.getBlockStateIfLoadedAndInBounds(pos); // Paper - don't load chunks for mob spawn
- if (!iblockdata.isRedstoneConductor(chunk, pos)) {
+ 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 k = 0;
@@ -195,7 +223,7 @@
if (entityhuman != null) {
double d2 = entityhuman.distanceToSqr(d0, (double) i, d1);
- if (NaturalSpawner.isRightDistanceToPlayerAndSpawnPoint(world, chunk, blockposition_mutableblockposition, d2)) {
+ if (world.isLoadedAndInBounds(blockposition_mutableblockposition) && NaturalSpawner.isRightDistanceToPlayerAndSpawnPoint(world, chunk, blockposition_mutableblockposition, d2)) { // Paper - don't load chunks for mob spawn
if (biomesettingsmobs_c == null) {
Optional<MobSpawnSettings.SpawnerData> optional = NaturalSpawner.getRandomSpawnMobAt(world, structuremanager, chunkgenerator, group, world.random, blockposition_mutableblockposition);
@@ -207,7 +235,13 @@
j1 = biomesettingsmobs_c.minCount + world.random.nextInt(1 + biomesettingsmobs_c.maxCount - biomesettingsmobs_c.minCount);
}
- if (NaturalSpawner.isValidSpawnPostitionForType(world, group, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2) && checker.test(biomesettingsmobs_c.type, blockposition_mutableblockposition, chunk)) {
+ // Paper start - PreCreatureSpawnEvent
+ PreSpawnStatus doSpawning = isValidSpawnPostitionForType(world, group, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2);
+ if (doSpawning == PreSpawnStatus.ABORT) {
+ return;
+ }
+ if (doSpawning == PreSpawnStatus.SUCCESS && checker.test(biomesettingsmobs_c.type, blockposition_mutableblockposition, chunk)) {
+ // Paper end - PreCreatureSpawnEvent
Mob entityinsentient = NaturalSpawner.getMobForSpawn(world, biomesettingsmobs_c.type);
if (entityinsentient == null) {
@@ -217,10 +251,15 @@
entityinsentient.moveTo(d0, (double) i, d1, world.random.nextFloat() * 360.0F, 0.0F);
if (NaturalSpawner.isValidPositionForMob(world, entityinsentient, d2)) {
groupdataentity = entityinsentient.finalizeSpawn(world, world.getCurrentDifficultyAt(entityinsentient.blockPosition()), EntitySpawnReason.NATURAL, groupdataentity);
- ++j;
- ++k1;
- world.addFreshEntityWithPassengers(entityinsentient);
- runner.run(entityinsentient, chunk);
+ // CraftBukkit start
+ // SPIGOT-7045: Give ocelot babies back their special spawn reason. Note: This is the only modification required as ocelots count as monsters which means they only spawn during normal chunk ticking and do not spawn during chunk generation as starter mobs.
+ world.addFreshEntityWithPassengers(entityinsentient, (entityinsentient instanceof net.minecraft.world.entity.animal.Ocelot && !((org.bukkit.entity.Ageable) entityinsentient.getBukkitEntity()).isAdult()) ? SpawnReason.OCELOT_BABY : SpawnReason.NATURAL);
+ if (!entityinsentient.isRemoved()) {
+ ++j;
+ ++k1;
+ runner.run(entityinsentient, chunk);
+ }
+ // CraftBukkit end
if (j >= entityinsentient.getMaxSpawnClusterSize()) {
return;
}
@@ -250,10 +289,31 @@
return squaredDistance <= 576.0D ? false : (world.getSharedSpawnPos().closerToCenterThan(new Vec3((double) pos.getX() + 0.5D, (double) pos.getY(), (double) pos.getZ() + 0.5D), 24.0D) ? false : Objects.equals(new ChunkPos(pos), chunk.getPos()) || world.isNaturalSpawningAllowed((BlockPos) pos));
}
- private static boolean isValidSpawnPostitionForType(ServerLevel world, MobCategory group, StructureManager structureAccessor, ChunkGenerator chunkGenerator, MobSpawnSettings.SpawnerData spawnEntry, BlockPos.MutableBlockPos pos, double squaredDistance) {
+ // Paper start - PreCreatureSpawnEvent
+ private enum PreSpawnStatus {
+ FAIL,
+ SUCCESS,
+ CANCELLED,
+ ABORT
+ }
+ private static PreSpawnStatus isValidSpawnPostitionForType(ServerLevel world, MobCategory group, StructureManager structureAccessor, ChunkGenerator chunkGenerator, MobSpawnSettings.SpawnerData spawnEntry, BlockPos.MutableBlockPos pos, double squaredDistance) {
+ // Paper end - PreCreatureSpawnEvent
EntityType<?> entitytypes = spawnEntry.type;
- return entitytypes.getCategory() == MobCategory.MISC ? false : (!entitytypes.canSpawnFarFromPlayer() && squaredDistance > (double) (entitytypes.getCategory().getDespawnDistance() * entitytypes.getCategory().getDespawnDistance()) ? false : (entitytypes.canSummon() && NaturalSpawner.canSpawnMobAt(world, structureAccessor, chunkGenerator, group, spawnEntry, pos) ? (!SpawnPlacements.isSpawnPositionOk(entitytypes, world, pos) ? false : (!SpawnPlacements.checkSpawnRules(entitytypes, world, EntitySpawnReason.NATURAL, pos, world.random) ? false : world.noCollision(entitytypes.getSpawnAABB((double) pos.getX() + 0.5D, (double) pos.getY(), (double) pos.getZ() + 0.5D)))) : false));
+ // Paper start - PreCreatureSpawnEvent
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ io.papermc.paper.util.MCUtil.toLocation(world, pos),
+ org.bukkit.craftbukkit.entity.CraftEntityType.minecraftToBukkit(entitytypes), SpawnReason.NATURAL
+ );
+ if (!event.callEvent()) {
+ if (event.shouldAbortSpawn()) {
+ return PreSpawnStatus.ABORT;
+ }
+ return PreSpawnStatus.CANCELLED;
+ }
+ // Paper end - PreCreatureSpawnEvent
+
+ return entitytypes.getCategory() == MobCategory.MISC ? PreSpawnStatus.FAIL : (!entitytypes.canSpawnFarFromPlayer() && squaredDistance > (double) (entitytypes.getCategory().getDespawnDistance() * entitytypes.getCategory().getDespawnDistance()) ? PreSpawnStatus.FAIL : (entitytypes.canSummon() && NaturalSpawner.canSpawnMobAt(world, structureAccessor, chunkGenerator, group, spawnEntry, pos) ? (!SpawnPlacements.isSpawnPositionOk(entitytypes, world, pos) ? PreSpawnStatus.FAIL : (!SpawnPlacements.checkSpawnRules(entitytypes, world, EntitySpawnReason.NATURAL, pos, world.random) ? PreSpawnStatus.FAIL : world.noCollision(entitytypes.getSpawnAABB((double) pos.getX() + 0.5D, (double) pos.getY(), (double) pos.getZ() + 0.5D)) ? PreSpawnStatus.SUCCESS : PreSpawnStatus.FAIL)) : PreSpawnStatus.FAIL)); // Paper - PreCreatureSpawnEvent
}
@Nullable
@@ -268,6 +328,7 @@
NaturalSpawner.LOGGER.warn("Can't spawn entity of type: {}", BuiltInRegistries.ENTITY_TYPE.getKey(type));
} catch (Exception exception) {
NaturalSpawner.LOGGER.warn("Failed to create mob", exception);
+ com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
}
return null;
@@ -356,6 +417,7 @@
entity = biomesettingsmobs_c.type.create(world.getLevel(), EntitySpawnReason.NATURAL);
} catch (Exception exception) {
NaturalSpawner.LOGGER.warn("Failed to create mob", exception);
+ com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
continue;
}
@@ -369,7 +431,7 @@
if (entityinsentient.checkSpawnRules(world, EntitySpawnReason.CHUNK_GENERATION) && entityinsentient.checkSpawnObstruction(world)) {
groupdataentity = entityinsentient.finalizeSpawn(world, world.getCurrentDifficultyAt(entityinsentient.blockPosition()), EntitySpawnReason.CHUNK_GENERATION, groupdataentity);
- world.addFreshEntityWithPassengers(entityinsentient);
+ world.addFreshEntityWithPassengers(entityinsentient, SpawnReason.CHUNK_GEN); // CraftBukkit
flag = true;
}
}
@@ -482,10 +544,12 @@
return this.unmodifiableMobCategoryCounts;
}
- boolean canSpawnForCategoryGlobal(MobCategory group) {
- int i = group.getMaxInstancesPerChunk() * this.spawnableChunkCount / NaturalSpawner.MAGIC_NUMBER;
+ // CraftBukkit start
+ boolean canSpawnForCategoryGlobal(MobCategory enumcreaturetype, int limit) {
+ int i = limit * this.spawnableChunkCount / NaturalSpawner.MAGIC_NUMBER;
+ // CraftBukkit end
- return this.mobCategoryCounts.getInt(group) < i;
+ return this.mobCategoryCounts.getInt(enumcreaturetype) < i;
}
boolean canSpawnForCategoryLocal(MobCategory group, ChunkPos chunkPos) {
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