PaperMC/patches/server/0377-Add-BlockStateMeta-clearBlockState.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

42 lines
2 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Thu, 11 Jan 2024 12:41:50 -0800
Subject: [PATCH] Add BlockStateMeta#clearBlockState
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBlockState.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBlockState.java
index 301d883a7626e3abd222517400367fc40d6fa2bd..23dbc56edf0d16cf07ced2899942abae28397694 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBlockState.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBlockState.java
@@ -198,6 +198,13 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
return this.blockEntityTag != null;
}
+ // Paper start - add method to clear block state
+ @Override
+ public void clearBlockState() {
+ this.blockEntityTag = null;
+ }
+ // Paper end - add method to clear block state
+
@Override
public BlockState getBlockState() {
return (this.blockEntityTag != null) ? this.blockEntityTag.copy() : CraftMetaBlockState.getBlockState(this.material, null);
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaShield.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaShield.java
index 3542c6e72f5ff459d50b73fa210ea835f52dfa49..c8eec04685456d89cb41466cddcc3975d0ceeb29 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaShield.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaShield.java
@@ -257,6 +257,13 @@ public class CraftMetaShield extends CraftMetaItem implements ShieldMeta, BlockS
this.banner = (Banner) blockState;
}
+ // Paper start - add method to clear block state
+ @Override
+ public void clearBlockState() {
+ this.banner = null;
+ }
+ // Paper end - add method to clear block state
+
private static Banner getBlockState(DyeColor color) {
BlockPos pos = BlockPos.ZERO;
Material stateMaterial = CraftMetaShield.shieldToBannerHack(color);