Paper/patches/server/1024-Lag-compensation-ticks.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sat, 23 Sep 2023 22:05:35 -0700
Subject: [PATCH] Lag compensation ticks
Areas affected by lag comepnsation:
- Block breaking and destroying
- Eating food items
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
2024-04-27 01:17:13 +02:00
index b21daeeb043df885fba5e6a7572d311fd0830815..8515cec5e21ad291ca427baaafb4c2f337f01208 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
2024-04-25 14:23:55 +02:00
@@ -318,6 +318,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
public volatile Thread shutdownThread; // Paper
public volatile boolean abnormalExit = false; // Paper
+ public static final long SERVER_INIT = System.nanoTime(); // Paper - Lag compensation
public static <S extends MinecraftServer> S spin(Function<Thread, S> serverFactory) {
AtomicReference<S> atomicreference = new AtomicReference();
2024-04-25 14:23:55 +02:00
@@ -1757,6 +1758,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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worldserver.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper - BlockPhysicsEvent
worldserver.hasEntityMoveEvent = io.papermc.paper.event.entity.EntityMoveEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper - Add EntityMoveEvent
2024-02-01 10:15:57 +01:00
net.minecraft.world.level.block.entity.HopperBlockEntity.skipHopperEvents = worldserver.paperConfig().hopper.disableMoveEvent || org.bukkit.event.inventory.InventoryMoveItemEvent.getHandlerList().getRegisteredListeners().length == 0; // Paper - Perf: Optimize Hoppers
+ worldserver.updateLagCompensationTick(); // Paper - lag compensation
this.profiler.push(() -> {
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String s = String.valueOf(worldserver);
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 35751ff961383280ffce1be18fc3c1aa311f0c08..a378866740b4f283d542028ad4dd75064083d5b7 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
2024-04-25 14:23:55 +02:00
@@ -570,6 +570,17 @@ public class ServerLevel extends Level implements WorldGenLevel {
return player != null && player.level() == this ? player : null;
}
// Paper end - optimise getPlayerByUUID
+ // Paper start - lag compensation
+ private long lagCompensationTick = net.minecraft.server.MinecraftServer.SERVER_INIT;
+
+ public long getLagCompensationTick() {
+ return this.lagCompensationTick;
+ }
+
+ public void updateLagCompensationTick() {
+ this.lagCompensationTick = (System.nanoTime() - net.minecraft.server.MinecraftServer.SERVER_INIT) / (java.util.concurrent.TimeUnit.MILLISECONDS.toNanos(50L));
+ }
+ // Paper end - lag compensation
// Add env and gen to constructor, IWorldDataServer -> WorldDataServer
public ServerLevel(MinecraftServer minecraftserver, Executor executor, LevelStorageSource.LevelStorageAccess convertable_conversionsession, PrimaryLevelData iworlddataserver, ResourceKey<Level> resourcekey, LevelStem worlddimension, ChunkProgressListener worldloadlistener, boolean flag, long i, List<CustomSpawner> list, boolean flag1, @Nullable RandomSequences randomsequences, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider) {
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
2024-04-25 14:42:47 +02:00
index f168044d36f22080504da171e5ed31a6f02385ba..5cedce1f432f6b809b25269242a16477682c824f 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
2024-04-25 14:23:55 +02:00
@@ -127,7 +127,7 @@ public class ServerPlayerGameMode {
}
public void tick() {
- this.gameTicks = MinecraftServer.currentTick; // CraftBukkit;
+ this.gameTicks = (int)this.level.getLagCompensationTick(); // CraftBukkit; // Paper - lag compensation
BlockState iblockdata;
if (this.hasDelayedDestroy) {
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 34793f2072e370ee6ec4a969d103dbe1fd230657..6751290fdcc30e3657c56660924bd5fb48418871 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3839,6 +3839,10 @@ public abstract class LivingEntity extends Entity implements Attackable {
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this.resendPossiblyDesyncedDataValues(java.util.List.of(DATA_LIVING_ENTITY_FLAGS), serverPlayer);
}
// Paper end - Properly cancel usable items
+ // Paper start - lag compensate eating
+ protected long eatStartTime;
+ protected int totalEatTimeTicks;
+ // Paper end - lag compensate eating
private void updatingUsingItem() {
if (this.isUsingItem()) {
if (ItemStack.isSameItem(this.getItemInHand(this.getUsedItemHand()), this.useItem)) {
@@ -3857,7 +3861,12 @@ public abstract class LivingEntity extends Entity implements Attackable {
this.triggerItemUseEffects(stack, 5);
}
- if (--this.useItemRemaining == 0 && !this.level().isClientSide && !stack.useOnRelease()) {
+ // Paper start - lag compensate eating
+ // we add 1 to the expected time to avoid lag compensating when we should not
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+ boolean shouldLagCompensate = this.useItem.getItem().components().has(DataComponents.FOOD) && this.eatStartTime != -1 && (System.nanoTime() - this.eatStartTime) > ((1 + this.totalEatTimeTicks) * 50 * (1000 * 1000));
+ if ((--this.useItemRemaining == 0 || shouldLagCompensate) && !this.level().isClientSide && !stack.useOnRelease()) {
+ this.useItemRemaining = 0;
+ // Paper end - lag compensate eating
this.completeUsingItem();
}
@@ -3903,7 +3912,10 @@ public abstract class LivingEntity extends Entity implements Attackable {
if (!itemstack.isEmpty() && !this.isUsingItem() || forceUpdate) { // Paper - Prevent consuming the wrong itemstack
this.useItem = itemstack;
- this.useItemRemaining = itemstack.getUseDuration();
+ // Paper start - lag compensate eating
+ this.useItemRemaining = this.totalEatTimeTicks = itemstack.getUseDuration();
+ this.eatStartTime = System.nanoTime();
+ // Paper end - lag compensate eating
if (!this.level().isClientSide) {
this.setLivingEntityFlag(1, true);
this.setLivingEntityFlag(2, hand == InteractionHand.OFF_HAND);
@@ -3928,7 +3940,10 @@ public abstract class LivingEntity extends Entity implements Attackable {
}
} else if (!this.isUsingItem() && !this.useItem.isEmpty()) {
this.useItem = ItemStack.EMPTY;
- this.useItemRemaining = 0;
+ // Paper start - lag compensate eating
+ this.useItemRemaining = this.totalEatTimeTicks = 0;
+ this.eatStartTime = -1L;
+ // Paper end - lag compensate eating
}
}
@@ -4063,7 +4078,10 @@ public abstract class LivingEntity extends Entity implements Attackable {
}
this.useItem = ItemStack.EMPTY;
- this.useItemRemaining = 0;
+ // Paper start - lag compensate eating
+ this.useItemRemaining = this.totalEatTimeTicks = 0;
+ this.eatStartTime = -1L;
+ // Paper end - lag compensate eating
}
public boolean isBlocking() {