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Remove wall-time / unused skip tick protection (#11412)

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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.
This commit is contained in:
Bjarne Koll 2024-09-19 16:36:07 +02:00 • committed by GitHub
parent 5c82955733
commit c5a10665b8
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GPG key ID: B5690EEEBB952194
794 changed files with 402 additions and 282 deletions
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32
patches/server/0848-Fix-rotation-when-spawning-display-entities.patch
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@ -1,32 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Gameoholic <viner.atmic@gmail.com>
Date: Sun, 30 Jul 2023 13:30:34 +0300
Subject: [PATCH] Fix rotation when spawning display entities
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
index 577ed3656480271a491bcd3d346c63854fd840e4..39aa116193f313f53540b0135d2ab26acb7f1469 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
@@ -221,6 +221,7 @@ public final class CraftEntityTypes {
Vector direction = spawnData.location().getDirection();
entity.assignDirectionalMovement(new Vec3(direction.getX(), direction.getY(), direction.getZ()), 1.0);
};
+ private static final BiConsumer<SpawnData, net.minecraft.world.entity.Entity> ROT = (spawnData, entity) -> entity.setRot(spawnData.yaw(), spawnData.pitch()); // Paper
private static final Map<Class<?>, EntityTypeData<?, ?>> CLASS_TYPE_DATA = new HashMap<>();
private static final Map<EntityType, EntityTypeData<?, ?>> ENTITY_TYPE_DATA = new HashMap<>();
@@ -361,10 +362,10 @@ public final class CraftEntityTypes {
// Set pos
register(new EntityTypeData<>(EntityType.MARKER, Marker.class, CraftMarker::new, createAndSetPos(net.minecraft.world.entity.EntityType.MARKER)));
- register(new EntityTypeData<>(EntityType.BLOCK_DISPLAY, BlockDisplay.class, CraftBlockDisplay::new, createAndSetPos(net.minecraft.world.entity.EntityType.BLOCK_DISPLAY)));
+ register(new EntityTypeData<>(EntityType.BLOCK_DISPLAY, BlockDisplay.class, CraftBlockDisplay::new, combine(createAndSetPos(net.minecraft.world.entity.EntityType.BLOCK_DISPLAY), ROT))); // Paper
register(new EntityTypeData<>(EntityType.INTERACTION, Interaction.class, CraftInteraction::new, createAndSetPos(net.minecraft.world.entity.EntityType.INTERACTION)));
- register(new EntityTypeData<>(EntityType.ITEM_DISPLAY, ItemDisplay.class, CraftItemDisplay::new, createAndSetPos(net.minecraft.world.entity.EntityType.ITEM_DISPLAY)));
- register(new EntityTypeData<>(EntityType.TEXT_DISPLAY, TextDisplay.class, CraftTextDisplay::new, createAndSetPos(net.minecraft.world.entity.EntityType.TEXT_DISPLAY)));
+ register(new EntityTypeData<>(EntityType.ITEM_DISPLAY, ItemDisplay.class, CraftItemDisplay::new, combine(createAndSetPos(net.minecraft.world.entity.EntityType.ITEM_DISPLAY), ROT))); // Paper
+ register(new EntityTypeData<>(EntityType.TEXT_DISPLAY, TextDisplay.class, CraftTextDisplay::new, combine(createAndSetPos(net.minecraft.world.entity.EntityType.TEXT_DISPLAY), ROT))); // Paper
// MISC
register(new EntityTypeData<>(EntityType.ITEM, Item.class, CraftItem::new, spawnData -> {