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PaperMC/patches/server/PreCreatureSpawnEvent.patch
Nassim Jahnke 2a2cdc2d1a [ci skip] Add more patch identifying comments
2024-01-22 18:04:55 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/util/SpawnUtil.java
+++ b/src/main/java/net/minecraft/util/SpawnUtil.java
@@ -0,0 +0,0 @@ public class SpawnUtil {
public static <T extends Mob> Optional<T> trySpawnMob(EntityType<T> 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 <T extends Mob> Optional<T> trySpawnMob(EntityType<T> 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 <T extends Mob> Optional<T> trySpawnMob(EntityType<T> 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();
@@ -0,0 +0,0 @@ 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
+ String key = EntityType.getKey(entitytypes).getPath();
+ org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(key);
+
+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
+ io.papermc.paper.util.MCUtil.toLocation(worldserver, blockposition),
+ type,
+ reason
+ );
+ if (!event.callEvent()) {
+ if (event.shouldAbortSpawn()) {
+ if (onAbort != null) {
+ onAbort.run();
+ }
+ return Optional.empty();
+ }
+ break;
+ }
+ // Paper end - PreCreatureSpawnEvent
T t0 = entitytypes.create(worldserver, (CompoundTag) null, 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/EntityType.java
+++ b/src/main/java/net/minecraft/world/entity/EntityType.java
@@ -0,0 +0,0 @@ public class EntityType<T extends Entity> implements FeatureElement, EntityTypeT
@Nullable
public T spawn(ServerLevel worldserver, @Nullable CompoundTag nbttagcompound, @Nullable Consumer<T> consumer, BlockPos blockposition, MobSpawnType enummobspawn, boolean flag, boolean flag1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason) {
// CraftBukkit end
+ // Paper start - 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(
+ io.papermc.paper.util.MCUtil.toLocation(worldserver, blockposition),
+ type,
+ spawnReason
+ );
+ if (!event.callEvent()) {
+ return null;
+ }
+ }
+ // Paper end - PreCreatureSpawnEvent
T t0 = this.create(worldserver, nbttagcompound, 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -0,0 +0,0 @@ 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -0,0 +0,0 @@ public abstract class BaseSpawner {
} else if (!SpawnPlacements.checkSpawnRules((EntityType) optional.get(), world, MobSpawnType.SPAWNER, blockposition1, world.getRandom())) {
continue;
}
+ // Paper start - PreCreatureSpawnEvent
+ 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(
+ io.papermc.paper.util.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 - 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
@@ -0,0 +0,0 @@ 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) {
@@ -0,0 +0,0 @@ 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;
+ // Paper start - PreCreatureSpawnEvent
+ 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(
+ io.papermc.paper.util.MCUtil.toLocation(world, pos),
+ type, SpawnReason.NATURAL
+ );
+ if (!event.callEvent()) {
+ if (event.shouldAbortSpawn()) {
+ return PreSpawnStatus.ABORT; // Paper
+ }
+ return PreSpawnStatus.CANCELLED; // Paper
+ }
+ }
+ // Paper end - PreCreatureSpawnEvent
if (entitytypes.getCategory() == MobCategory.MISC) {
- return false;
+ return PreSpawnStatus.FAIL; // Paper - PreCreatureSpawnEvent
} else if (!entitytypes.canSpawnFarFromPlayer() && squaredDistance > (double) (entitytypes.getCategory().getDespawnDistance() * entitytypes.getCategory().getDespawnDistance())) {
- return false;
+ return PreSpawnStatus.FAIL; // Paper - PreCreatureSpawnEvent
} else if (entitytypes.canSummon() && NaturalSpawner.canSpawnMobAt(world, structureAccessor, chunkGenerator, group, spawnEntry, pos)) {
SpawnPlacements.Type entitypositiontypes_surface = SpawnPlacements.getPlacementType(entitytypes);
- return !NaturalSpawner.isSpawnPositionOk(entitypositiontypes_surface, world, pos, entitytypes) ? false : (!SpawnPlacements.checkSpawnRules(entitytypes, world, MobSpawnType.NATURAL, pos, world.random) ? false : world.noCollision(entitytypes.getAABB((double) pos.getX() + 0.5D, (double) pos.getY(), (double) pos.getZ() + 0.5D)));
+ boolean isValid = !NaturalSpawner.isSpawnPositionOk(entitypositiontypes_surface, world, pos, entitytypes) ? false : (!SpawnPlacements.checkSpawnRules(entitytypes, world, MobSpawnType.NATURAL, pos, world.random) ? false : world.noCollision(entitytypes.getAABB((double) pos.getX() + 0.5D, (double) pos.getY(), (double) pos.getZ() + 0.5D))); // Paper - PreCreatureSpawnEvent
+ return isValid ? PreSpawnStatus.SUCCESS : PreSpawnStatus.FAIL; // Paper - PreCreatureSpawnEvent
} else {
- return false;
+ return PreSpawnStatus.FAIL; // Paper - PreCreatureSpawnEvent
}
}
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