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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
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
794 changed files with 402 additions and 282 deletions
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68
patches/server/0459-Add-EntityLoadCrossbowEvent.patch Normal file
View file

@ -0,0 +1,68 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: JRoy <joshroy126@gmail.com>
Date: Wed, 7 Oct 2020 12:04:01 -0400
Subject: [PATCH] Add EntityLoadCrossbowEvent
diff --git a/src/main/java/net/minecraft/world/item/CrossbowItem.java b/src/main/java/net/minecraft/world/item/CrossbowItem.java
index f64cdfac1fc1333845ea4ea5efb7922f0ae39619..c39fa953accd6cf35672f452052cca42fe6f29d0 100644
--- a/src/main/java/net/minecraft/world/item/CrossbowItem.java
+++ b/src/main/java/net/minecraft/world/item/CrossbowItem.java
@@ -89,7 +89,14 @@ public class CrossbowItem extends ProjectileWeaponItem {
public void releaseUsing(ItemStack stack, Level world, LivingEntity user, int remainingUseTicks) {
int i = this.getUseDuration(stack, user) - remainingUseTicks;
float f = getPowerForTime(i, stack, user);
- if (f >= 1.0F && !isCharged(stack) && tryLoadProjectiles(user, stack)) {
+ // Paper start - Add EntityLoadCrossbowEvent
+ if (f >= 1.0F && !isCharged(stack)) {
+ final io.papermc.paper.event.entity.EntityLoadCrossbowEvent event = new io.papermc.paper.event.entity.EntityLoadCrossbowEvent(user.getBukkitLivingEntity(), stack.asBukkitMirror(), org.bukkit.craftbukkit.CraftEquipmentSlot.getHand(user.getUsedItemHand()));
+ if (!event.callEvent() || !tryLoadProjectiles(user, stack, event.shouldConsumeItem()) || !event.shouldConsumeItem()) {
+ if (user instanceof ServerPlayer player) player.containerMenu.sendAllDataToRemote();
+ return;
+ }
+ // Paper end - Add EntityLoadCrossbowEvent
CrossbowItem.ChargingSounds chargingSounds = this.getChargingSounds(stack);
chargingSounds.end()
.ifPresent(
@@ -107,8 +114,14 @@ public class CrossbowItem extends ProjectileWeaponItem {
}
}
- private static boolean tryLoadProjectiles(LivingEntity shooter, ItemStack crossbow) {
- List<ItemStack> list = draw(crossbow, shooter.getProjectile(crossbow), shooter);
+ @io.papermc.paper.annotation.DoNotUse // Paper - Add EntityLoadCrossbowEvent
+ private static boolean tryLoadProjectiles(LivingEntity shooter, ItemStack crossbow) {
+ // Paper start - Add EntityLoadCrossbowEvent
+ return CrossbowItem.tryLoadProjectiles(shooter, crossbow, true);
+ }
+ private static boolean tryLoadProjectiles(LivingEntity shooter, ItemStack crossbow, boolean consume) {
+ List<ItemStack> list = draw(crossbow, shooter.getProjectile(crossbow), shooter, consume);
+ // Paper end - Add EntityLoadCrossbowEvent
if (!list.isEmpty()) {
crossbow.set(DataComponents.CHARGED_PROJECTILES, ChargedProjectiles.of(list));
return true;
diff --git a/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java b/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
index 56595dd3a0b7df4b5f9819ade797212278c8fd40..32dd0b13a0819f597d8a93c6bc3a155781067544 100644
--- a/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
+++ b/src/main/java/net/minecraft/world/item/ProjectileWeaponItem.java
@@ -114,6 +114,11 @@ public abstract class ProjectileWeaponItem extends Item {
}
protected static List<ItemStack> draw(ItemStack stack, ItemStack projectileStack, LivingEntity shooter) {
+ // Paper start
+ return draw(stack, projectileStack, shooter, true);
+ }
+ protected static List<ItemStack> draw(ItemStack stack, ItemStack projectileStack, LivingEntity shooter, boolean consume) {
+ // Paper end
if (projectileStack.isEmpty()) {
return List.of();
} else {
@@ -133,7 +138,7 @@ public abstract class ProjectileWeaponItem extends Item {
ItemStack itemstack2 = projectileStack.copy();
for (int k = 0; k < j; ++k) {
- ItemStack itemstack3 = ProjectileWeaponItem.useAmmo(stack, k == 0 ? projectileStack : itemstack2, shooter, k > 0);
+ ItemStack itemstack3 = ProjectileWeaponItem.useAmmo(stack, k == 0 ? projectileStack : itemstack2, shooter, k > 0 || !consume); // Paper
if (!itemstack3.isEmpty()) {
list.add(itemstack3);