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Paper/Spigot-Server-Patches/0113-Fix-Bugs-with-Spigot-Mob-Spawn-Logic.patch
2018-01-10 23:31:19 -06:00

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From f47639cb7c51dfa19cfd33bc6fa1346071430a1b Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 14 Apr 2016 21:01:39 -0400
Subject: [PATCH] Fix Bugs with Spigot Mob Spawn Logic
Spigot drastically altered vanilla mob spawn logic and caused a few issues.
1) Used only spawnable chunks vs entire world for entity counting, resulting in ignoring
other entities in the world, and causing the world to go over its intended limit.
Specially with servers using smaller mob spawn ranges than view distance, as well as affects spawning API
2) Spigot was using 16x16 division instead of vanilla 17x17 division.
This patch returns mob counting to use all loaded chunks, and 17x17 division.
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 300a5619..ecc76a88 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -683,7 +683,7 @@ public class Chunk {
i = this.entitySlices.length - 1;
}
- this.entitySlices[i].remove(entity);
+ if (!this.entitySlices[i].remove(entity)) { return; } // Paper
// Paper start - update counts
if (entity instanceof EntityItem) {
itemCounts[i]--;
diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
index 45a83ae9..2cd06382 100644
--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
@@ -23,6 +23,15 @@ public final class SpawnerCreature {
// Spigot start - get entity count only from chunks being processed in b
private int getEntityCount(WorldServer server, Class oClass)
{
+ // Paper start - use entire world, not just active chunks. Spigot broke vanilla expectations.
+ if (true) {
+ return server
+ .getChunkProviderServer()
+ .chunks.values()
+ .stream()
+ .collect(java.util.stream.Collectors.summingInt(c -> c.entityCount.get(oClass)));
+ }
+ // Paper end
int i = 0;
Iterator<Long> it = this.b.iterator();
while ( it.hasNext() )
@@ -126,7 +135,7 @@ public final class SpawnerCreature {
int l1 = limit * i / a; // CraftBukkit - use per-world limits
*/ // Paper end
- if ((mobcnt = getEntityCount(worldserver, enumcreaturetype.a())) <= limit * i / 256) {
+ if ((mobcnt = getEntityCount(worldserver, enumcreaturetype.a())) <= limit * i / 289) { // Paper - use 17x17 like vanilla (a at top of file)
BlockPosition.MutableBlockPosition blockposition_mutableblockposition = new BlockPosition.MutableBlockPosition();
Iterator iterator1 = this.b.iterator();
--
2.14.3