PaperMC/patches/server/0849-Use-correct-source-for-mushroom-block-spread-event.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

27 lines
1.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Warrior <50800980+Warriorrrr@users.noreply.github.com>
Date: Tue, 8 Aug 2023 11:49:32 +0200
Subject: [PATCH] Use correct source for mushroom block spread event
diff --git a/src/main/java/net/minecraft/world/level/block/MushroomBlock.java b/src/main/java/net/minecraft/world/level/block/MushroomBlock.java
index f549cac99a665f20f1cd1d8c807ed3649fed7531..1172d85c5c26ab2142343d91149766e5993cb36a 100644
--- a/src/main/java/net/minecraft/world/level/block/MushroomBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/MushroomBlock.java
@@ -68,6 +68,7 @@ public class MushroomBlock extends BushBlock implements BonemealableBlock {
}
BlockPos blockposition2 = pos.offset(random.nextInt(3) - 1, random.nextInt(2) - random.nextInt(2), random.nextInt(3) - 1);
+ final BlockPos sourcePos = pos; // Paper - Use correct source for mushroom block spread event
for (int j = 0; j < 4; ++j) {
if (world.isEmptyBlock(blockposition2) && state.canSurvive(world, blockposition2)) {
@@ -78,7 +79,7 @@ public class MushroomBlock extends BushBlock implements BonemealableBlock {
}
if (world.isEmptyBlock(blockposition2) && state.canSurvive(world, blockposition2)) {
- org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(world, pos, blockposition2, state, 2); // CraftBukkit
+ org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(world, sourcePos, blockposition2, state, 2); // CraftBukkit // Paper - Use correct source for mushroom block spread event
}
}