ef0dfd0628
Setting the flag updates the spawner's delay which stops the spawner from trying to find a new spawn position each tick efter the event was cancelled/aborted which makes it usable for mob stackers/mergers and other plugins that don't actually want any mob to spawn in the spawner cycle but keep the overall behaviour close to vanilla. This might slightly effect existing plugins that use this event but I doubt anyone really relied on this behaviour, the only possible use case that I can think of is cancelling the event until you find a suitable position in your plugin... and this should be handled by the plugin itself by cancelling and spawning at the position manually.
91 lines
5.4 KiB
Diff
91 lines
5.4 KiB
Diff
From 0ae51485d202666ce7a9cfdb15feb2a587c0c445 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sun, 14 Jan 2018 17:01:31 -0500
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Subject: [PATCH] PreCreatureSpawnEvent
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Adds an event to fire before an Entity is created, so that plugins that need to cancel
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CreatureSpawnEvent can do so from this event instead.
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Cancelling CreatureSpawnEvent rapidly causes a lot of garbage collection and CPU waste
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as it's done after the Entity object has been fully created.
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Mob Limiting plugins and blanket "ban this type of monster" plugins should use this event
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instead and save a lot of server resources.
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See: https://github.com/PaperMC/Paper/issues/917
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diff --git a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
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index 87fe4775..94d0b8a3 100644
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--- a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
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+++ b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
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@@ -1,6 +1,7 @@
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package net.minecraft.server;
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import com.google.common.collect.Lists;
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+
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import java.util.Iterator;
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import java.util.List;
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import javax.annotation.Nullable;
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@@ -87,6 +88,28 @@ public abstract class MobSpawnerAbstract {
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double d3 = j >= 1 ? nbttaglist.f(0) : (double) blockposition.getX() + (world.random.nextDouble() - world.random.nextDouble()) * (double) this.spawnRange + 0.5D;
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double d4 = j >= 2 ? nbttaglist.f(1) : (double) (blockposition.getY() + world.random.nextInt(3) - 1);
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double d5 = j >= 3 ? nbttaglist.f(2) : (double) blockposition.getZ() + (world.random.nextDouble() - world.random.nextDouble()) * (double) this.spawnRange + 0.5D;
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+ // Paper start
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+ if (this.getMobName() == null) {
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+ return;
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+ }
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+ String key = this.getMobName().getKey();
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+ org.bukkit.entity.EntityType type = org.bukkit.entity.EntityType.fromName(key);
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+ if (type != null) {
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+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
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+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
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+ MCUtil.toLocation(world, d3, d4, d5),
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+ type,
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+ org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SPAWNER
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+ );
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+ if (!event.callEvent()) {
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+ flag = true;
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+ if (event.shouldAbortSpawn()) {
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+ break;
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+ }
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+ continue;
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+ }
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+ }
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+ // Paper end
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Entity entity = ChunkRegionLoader.a(nbttagcompound, world, d3, d4, d5, false);
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if (entity == null) {
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diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
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index ed22607d..5d633774 100644
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--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
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+++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
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@@ -184,6 +184,25 @@ public final class SpawnerCreature {
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}
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if (worldserver.a(enumcreaturetype, biomebase_biomemeta, (BlockPosition) blockposition_mutableblockposition) && a(EntityPositionTypes.a(biomebase_biomemeta.b), worldserver, blockposition_mutableblockposition)) {
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+ // Paper start
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+ com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent event;
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+ Class<? extends EntityInsentient> cls = biomebase_biomemeta.b;
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+ org.bukkit.entity.EntityType type = EntityTypes.clsToTypeMap.get(cls);
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+ if (type != null) {
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+ event = new com.destroystokyo.paper.event.entity.PreCreatureSpawnEvent(
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+ MCUtil.toLocation(worldserver, blockposition_mutableblockposition),
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+ type, SpawnReason.NATURAL
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+ );
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+ if (!event.callEvent()) {
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+ if (event.shouldAbortSpawn()) {
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+ continue label120;
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+ }
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+ j1 += l2;
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+ ++j4;
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+ continue;
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+ }
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+ }
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+ // Paper end
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EntityInsentient entityinsentient;
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try {
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--
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2.16.2.windows.1
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