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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.
33 lines
1.7 KiB
Diff
33 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Phoenix616 <max@themoep.de>
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Date: Sun, 20 Jun 2021 16:35:42 +0100
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Subject: [PATCH] Don't apply cramming damage to players
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It does not make a lot of sense to damage players if they get crammed,
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especially as the usecase of teleporting lots of players to the same
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location isn't too uncommon and killing all those players isn't
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really what one would expect to happen.
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For those who really want it a config option is provided.
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diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index 9982940af7d10ca7799e2c21ac994ea3afa0b805..d1b21afe48dbe1e53d4a046434336be580497165 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -95,6 +95,7 @@ import net.minecraft.util.Mth;
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import net.minecraft.util.RandomSource;
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import net.minecraft.util.Unit;
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import net.minecraft.world.damagesource.DamageSource;
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+import net.minecraft.world.damagesource.DamageSources;
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import net.minecraft.world.effect.MobEffectInstance;
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import net.minecraft.world.effect.MobEffects;
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import net.minecraft.world.entity.Entity;
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@@ -1545,7 +1546,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
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@Override
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public boolean isInvulnerableTo(DamageSource damageSource) {
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- return super.isInvulnerableTo(damageSource) || this.isChangingDimension();
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+ return super.isInvulnerableTo(damageSource) || this.isChangingDimension() || !this.level().paperConfig().collisions.allowPlayerCrammingDamage && damageSource == damageSources().cramming(); // Paper - disable player cramming
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}
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@Override
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