Paper/Spigot-Server-Patches/0111-Chunk-registration-fixes.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 21 Sep 2016 22:54:28 -0400
Subject: [PATCH] Chunk registration fixes
World checks and the Chunk Add logic are inconsistent on how Y > 256, < 0, is treated
Keep them consistent
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 9599f1141c90e803ca0a9cd9b15ed1205beca8eb..8e005ead10a9ac738b0e626239926bbf30e16695 100644
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--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -736,7 +736,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
if (entity.cl()) {
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this.getMethodProfiler().enter("chunkCheck");
int i = MathHelper.floor(entity.locX() / 16.0D);
- int j = MathHelper.floor(entity.locY() / 16.0D);
+ int j = Math.min(15, Math.max(0, MathHelper.floor(entity.locY() / 16.0D))); // Paper - stay consistent with chunk add/remove behavior
int k = MathHelper.floor(entity.locZ() / 16.0D);
if (!entity.inChunk || entity.chunkX != i || entity.chunkY != j || entity.chunkZ != k) {