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/util/SpawnUtil.java b/src/main/java/net/minecraft/util/SpawnUtil.java index 3f2cad4c9c0400bf93932cb7f7219c2185fc7370..5c8e36ea8287029b1789719c687bac1a2c4c3a69 100644 --- a/src/main/java/net/minecraft/util/SpawnUtil.java +++ b/src/main/java/net/minecraft/util/SpawnUtil.java @@ -21,10 +21,10 @@ public class SpawnUtil { public static Optional trySpawnMob(EntityType entityType, MobSpawnType reason, ServerLevel world, BlockPos pos, int tries, int horizontalRange, int verticalRange, SpawnUtil.Strategy requirements) { // CraftBukkit start - return SpawnUtil.trySpawnMob(entityType, reason, world, pos, tries, horizontalRange, verticalRange, requirements, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.DEFAULT); + return SpawnUtil.trySpawnMob(entityType, reason, world, pos, tries, horizontalRange, verticalRange, requirements, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.DEFAULT, null); // Paper } - public static Optional trySpawnMob(EntityType entitytypes, MobSpawnType enummobspawn, ServerLevel worldserver, BlockPos blockposition, int i, int j, int k, SpawnUtil.Strategy spawnutil_a, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason) { + public static Optional trySpawnMob(EntityType entitytypes, MobSpawnType enummobspawn, ServerLevel worldserver, BlockPos blockposition, int i, int j, int k, SpawnUtil.Strategy spawnutil_a, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason, @javax.annotation.Nullable Runnable onAbort) { // Paper // CraftBukkit end BlockPos.MutableBlockPos blockposition_mutableblockposition = blockposition.mutable(); @@ -34,6 +34,22 @@ public class SpawnUtil { blockposition_mutableblockposition.setWithOffset(blockposition, i1, k, j1); if (worldserver.getWorldBorder().isWithinBounds((BlockPos) blockposition_mutableblockposition) && SpawnUtil.moveToPossibleSpawnPosition(worldserver, k, blockposition_mutableblockposition, spawnutil_a)) { + // Paper start - PreCreatureSpawnEvent + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + io.papermc.paper.util.MCUtil.toLocation(worldserver, blockposition), + org.bukkit.craftbukkit.entity.CraftEntityType.minecraftToBukkit(entitytypes), + reason + ); + if (!event.callEvent()) { + if (event.shouldAbortSpawn()) { + if (onAbort != null) { + onAbort.run(); + } + return Optional.empty(); + } + break; + } + // Paper end - PreCreatureSpawnEvent T t0 = entitytypes.create(worldserver, (Consumer) null, blockposition_mutableblockposition, enummobspawn, false, false); // CraftBukkit - decompile error if (t0 != null) { diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java index 5e31d2799c299e5c3d4c02871f785179a2422323..fb621b161b0a47fac2c44b369ed01c27278bc4f6 100644 --- a/src/main/java/net/minecraft/world/entity/EntityType.java +++ b/src/main/java/net/minecraft/world/entity/EntityType.java @@ -430,6 +430,16 @@ public class EntityType implements FeatureElement, EntityTypeT @Nullable public T spawn(ServerLevel worldserver, @Nullable Consumer consumer, BlockPos blockposition, MobSpawnType enummobspawn, boolean flag, boolean flag1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason) { // CraftBukkit end + // Paper start - PreCreatureSpawnEvent + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + io.papermc.paper.util.MCUtil.toLocation(worldserver, blockposition), + org.bukkit.craftbukkit.entity.CraftEntityType.minecraftToBukkit(this), + spawnReason + ); + if (!event.callEvent()) { + return null; + } + // Paper end - PreCreatureSpawnEvent T t0 = this.create(worldserver, consumer, 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 d1c3f5d076a3d560d02553d6a33e5890d0c2bfc7..4d7f95d2bd415bacccee145bfc47f2b480530c11 100644 --- a/src/main/java/net/minecraft/world/entity/npc/Villager.java +++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java @@ -968,7 +968,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler }).limit(5L).collect(Collectors.toList()); if (list1.size() >= requiredCount) { - if (!SpawnUtil.trySpawnMob(EntityType.IRON_GOLEM, MobSpawnType.MOB_SUMMONED, world, this.blockPosition(), 10, 8, 6, SpawnUtil.Strategy.LEGACY_IRON_GOLEM, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.VILLAGE_DEFENSE).isEmpty()) { // CraftBukkit + if (SpawnUtil.trySpawnMob(EntityType.IRON_GOLEM, MobSpawnType.MOB_SUMMONED, world, this.blockPosition(), 10, 8, 6, SpawnUtil.Strategy.LEGACY_IRON_GOLEM, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.VILLAGE_DEFENSE, () -> {GolemSensor.golemDetected(this);}).isPresent()) { // CraftBukkit // Paper - Set Golem Last Seen to stop it from spawning another one list.forEach(GolemSensor::golemDetected); } } diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java index 31fe2faf9137ac8b1acca9a5ffc5bbcc8aab16c1..d13abdcc7a54bdecf853c883911ef535733610b4 100644 --- a/src/main/java/net/minecraft/world/level/BaseSpawner.java +++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java @@ -132,6 +132,20 @@ public abstract class BaseSpawner { } else if (!SpawnPlacements.checkSpawnRules((EntityType) optional.get(), world, MobSpawnType.SPAWNER, blockposition1, world.getRandom())) { continue; } + // Paper start - PreCreatureSpawnEvent + com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent( + io.papermc.paper.util.MCUtil.toLocation(world, d0, d1, d2), + org.bukkit.craftbukkit.entity.CraftEntityType.minecraftToBukkit(optional.get()), + org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SPAWNER + ); + if (!event.callEvent()) { + flag = true; + if (event.shouldAbortSpawn()) { + break; + } + continue; + } + // Paper end - PreCreatureSpawnEvent Entity entity = EntityType.loadEntityRecursive(nbttagcompound, world, (entity1) -> { entity1.moveTo(d0, d1, d2, entity1.getYRot(), entity1.getXRot()); diff --git a/src/main/java/net/minecraft/world/level/NaturalSpawner.java b/src/main/java/net/minecraft/world/level/NaturalSpawner.java index 6324689f52363f19501143c1649f0885684cb796..bce78beaadbfd0e400457bd14bcf6538be702879 100644 --- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java +++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java @@ -208,7 +208,13 @@ 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 - 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) { @@ -256,10 +262,31 @@ public final class NaturalSpawner { 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, MobSpawnType.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, MobSpawnType.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