From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Aikar Date: Sun, 14 Jan 2018 17:01:31 -0500 Subject: [PATCH] PreCreatureSpawnEvent Adds an event to fire before an Entity is created, so that plugins that need to cancel CreatureSpawnEvent can do so from this event instead. Cancelling CreatureSpawnEvent rapidly causes a lot of garbage collection and CPU waste as it's done after the Entity object has been fully created. Mob Limiting plugins and blanket "ban this type of monster" plugins should use this event instead and save a lot of server resources. See: https://github.com/PaperMC/Paper/issues/917 diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java index 9f5f2bd9bdfce14da030b09f56c821ec1989e12f..872f92ac1a6bc86ce54700dbf555ceea4fab2057 100644 --- a/src/main/java/net/minecraft/world/entity/EntityType.java +++ b/src/main/java/net/minecraft/world/entity/EntityType.java @@ -333,6 +333,20 @@ public class EntityType implements EntityTypeTest { @Nullable public T spawnCreature(ServerLevel worldserver, @Nullable CompoundTag nbttagcompound, @Nullable Component ichatbasecomponent, @Nullable Player entityhuman, BlockPos blockposition, MobSpawnType enummobspawn, boolean flag, boolean flag1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason) { + // Paper start - Call PreCreatureSpawnEvent + org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(EntityType.getKey(this).getPath()); + if (type != null) { + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event; + event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + net.minecraft.server.MCUtil.toLocation(worldserver, blockposition), + type, + spawnReason + ); + if (!event.callEvent()) { + return null; + } + } + // Paper end T t0 = this.create(worldserver, nbttagcompound, ichatbasecomponent, entityhuman, blockposition, enummobspawn, flag, flag1); if (t0 != null) { diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java index 6a9e2105b2d9a4ee83c0a2516d5ef26dc3b99053..aec77679584a2acab5818e26e2586b5316118e84 100644 --- a/src/main/java/net/minecraft/world/entity/npc/Villager.java +++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java @@ -987,6 +987,21 @@ public class Villager extends AbstractVillager implements ReputationEventHandler BlockPos blockposition1 = this.findSpawnPositionForGolemInColumn(blockposition, d0, d1); if (blockposition1 != null) { + // Paper start - Call PreCreatureSpawnEvent + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event; + event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + net.minecraft.server.MCUtil.toLocation(level, blockposition1), + org.bukkit.entity.EntityType.IRON_GOLEM, + org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.VILLAGE_DEFENSE + ); + if (!event.callEvent()) { + if (event.shouldAbortSpawn()) { + GolemSensor.golemDetected(this); // Set Golem Last Seen to stop it from spawning another one + return null; + } + break; + } + // Paper end IronGolem entityirongolem = (IronGolem) EntityType.IRON_GOLEM.create(world, (CompoundTag) null, (Component) null, (Player) null, blockposition1, MobSpawnType.MOB_SUMMONED, false, false); if (entityirongolem != null) { diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java index c6298b12e4e0c20be20e7e493be728f028f9eb31..68ce2732dfdc25ddadc15c43c30a609f9b1eba86 100644 --- a/src/main/java/net/minecraft/world/level/BaseSpawner.java +++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java @@ -132,6 +132,27 @@ public abstract class BaseSpawner { double d2 = j >= 3 ? nbttaglist.getDouble(2) : (double) pos.getZ() + (world.random.nextDouble() - world.random.nextDouble()) * (double) this.spawnRange + 0.5D; if (world.noCollision(((EntityType) optional.get()).getAABB(d0, d1, d2)) && SpawnPlacements.checkSpawnRules((EntityType) optional.get(), world, MobSpawnType.SPAWNER, new BlockPos(d0, d1, d2), world.getRandom())) { + // Paper start + EntityType entityType = optional.get(); + String key = EntityType.getKey(entityType).getPath(); + + org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(key); + if (type != null) { + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event; + event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + net.minecraft.server.MCUtil.toLocation(world, d0, d1, d2), + type, + org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SPAWNER + ); + if (!event.callEvent()) { + flag = true; + if (event.shouldAbortSpawn()) { + break; + } + continue; + } + } + // Paper end Entity entity = EntityType.loadEntityRecursive(nbttagcompound, world, (entity1) -> { entity1.moveTo(d0, d1, d2, entity1.getYRot(), entity1.getXRot()); return entity1; @@ -349,3 +370,4 @@ public abstract class BaseSpawner { return this.oSpin; } } + diff --git a/src/main/java/net/minecraft/world/level/NaturalSpawner.java b/src/main/java/net/minecraft/world/level/NaturalSpawner.java index 30ba1e3cb75d994770b006b9dfd6669000a9c1a4..6204bf41d410df9784b32f993b46d7adb2af5f13 100644 --- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java +++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java @@ -231,7 +231,13 @@ public final class NaturalSpawner { 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 + Boolean doSpawning = isValidSpawnPostitionForType(world, group, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2); + if (doSpawning == null) { + return; + } + if (doSpawning && checker.test(biomesettingsmobs_c.type, blockposition_mutableblockposition, chunk)) { + // Paper end Mob entityinsentient = NaturalSpawner.getMobForSpawn(world, biomesettingsmobs_c.type); if (entityinsentient == null) { @@ -278,9 +284,25 @@ public final class NaturalSpawner { return squaredDistance <= 576.0D ? false : (world.getSharedSpawnPos().closerThan((Position) (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.isPositionEntityTicking((BlockPos) pos)); } - private static boolean isValidSpawnPostitionForType(ServerLevel world, MobCategory group, StructureFeatureManager structureAccessor, ChunkGenerator chunkGenerator, MobSpawnSettings.SpawnerData spawnEntry, BlockPos.MutableBlockPos pos, double squaredDistance) { + private static Boolean isValidSpawnPostitionForType(ServerLevel world, MobCategory group, StructureFeatureManager structureAccessor, ChunkGenerator chunkGenerator, MobSpawnSettings.SpawnerData spawnEntry, BlockPos.MutableBlockPos pos, double squaredDistance) { // Paper EntityType entitytypes = spawnEntry.type; + // Paper start + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event; + org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(EntityType.getKey(entitytypes).getPath()); + if (type != null) { + event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + net.minecraft.server.MCUtil.toLocation(world, pos), + type, SpawnReason.NATURAL + ); + if (!event.callEvent()) { + if (event.shouldAbortSpawn()) { + return null; + } + return false; + } + } + // Paper end if (entitytypes.getCategory() == MobCategory.MISC) { return false; } else if (!entitytypes.canSpawnFarFromPlayer() && squaredDistance > (double) (entitytypes.getCategory().getDespawnDistance() * entitytypes.getCategory().getDespawnDistance())) {