PaperMC/Spigot-Server-Patches/Prevent-mob-spawning-from-loading-generating-chunks.patch
Spottedleaf 4d6f73449f Updated Upstream (CraftBukkit)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

CraftBukkit Changes:
17543ecf SPIGOT-5035: Error Using Virtual Merchant GUI
0fc6922b SPIGOT-5028: Villager#setVillagerExperience() doesn't work
bdbdbe44 SPIGOT-5024: Fox error - Unknown target reason
2019-06-06 08:36:57 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 12 Sep 2018 21:12:57 -0400
Subject: [PATCH] Prevent mob spawning from loading/generating chunks
also prevents if out of world border bounds
diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
index 5da0f2211b..94d7bca09d 100644
--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
@@ -0,0 +0,0 @@ public final class SpawnerCreature {
int l = blockposition1.getZ();
if (k >= 1) {
- IBlockData iblockdata = chunk.getType(blockposition1);
+ IBlockData iblockdata = world.getTypeIfLoadedAndInBounds(blockposition1); // Paper - don't load chunks for mob spawn
- if (!iblockdata.isOccluding(chunk, blockposition1)) {
+ if (iblockdata != null && !iblockdata.isOccluding(chunk, blockposition1)) { // Paper - don't load chunks for mob spawn
BlockPosition.MutableBlockPosition blockposition_mutableblockposition = new BlockPosition.MutableBlockPosition();
int i1 = 0;
@@ -0,0 +0,0 @@ public final class SpawnerCreature {
float f1 = (float) k1 + 0.5F;
EntityHuman entityhuman = world.a((double) f, (double) f1, -1.0D);
- if (entityhuman != null && entityhuman.e((double) f, (double) k, (double) f1) > 576.0D && !blockposition.a((IPosition) (new Vec3D((double) f, (double) k, (double) f1)), 24.0D)) {
+ if (entityhuman != null && entityhuman.e((double) f, (double) k, (double) f1) > 576.0D && !blockposition.a((IPosition) (new Vec3D((double) f, (double) k, (double) f1)), 24.0D) && world.isLoadedAndInBounds(blockposition_mutableblockposition)) { // Paper - don't load chunks for mob spawn
ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(blockposition_mutableblockposition);
if (Objects.equals(chunkcoordintpair, chunk.getPos()) || world.getChunkProvider().a(chunkcoordintpair)) {
--