PaperMC/patches/server/0302-Prevent-bees-loading-chunks-checking-hive-position.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.

To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.

These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.

Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
2024-09-19 16:36:07 +02:00

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1.1 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Sun, 5 Jan 2020 17:24:34 -0600
Subject: [PATCH] Prevent bees loading chunks checking hive position
diff --git a/src/main/java/net/minecraft/world/entity/animal/Bee.java b/src/main/java/net/minecraft/world/entity/animal/Bee.java
index 048d03c8ef3ef865641b2276477cf84e8d4397a1..58536ee8707c5ad0625cae2f26a58cf03b3f85d7 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Bee.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Bee.java
@@ -510,6 +510,7 @@ public class Bee extends Animal implements NeutralMob, FlyingAnimal {
} else if (this.isTooFarAway(this.hivePos)) {
return false;
} else {
+ if (this.level().getChunkIfLoadedImmediately(this.hivePos.getX() >> 4, this.hivePos.getZ() >> 4) == null) return true; // Paper - just assume the hive is still there, no need to load the chunk(s)
BlockEntity tileentity = this.level().getBlockEntity(this.hivePos);
return tileentity != null && tileentity.getType() == BlockEntityType.BEEHIVE;