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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.
19 lines
1.1 KiB
Diff
19 lines
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Nassim Jahnke <nassim@njahnke.dev>
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Date: Tue, 28 Sep 2021 09:47:47 +0200
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Subject: [PATCH] Ensure valid vehicle status
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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 6648af4d8d795637fae444dc85803b399592fd7d..25ca370c0b19eca529fc2c980c50e899013f0897 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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@@ -574,7 +574,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
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}
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}
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- if (persistVehicle && entity1 != null && entity != this && entity.hasExactlyOnePlayerPassenger()) {
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+ if (persistVehicle && entity1 != null && entity != this && entity.hasExactlyOnePlayerPassenger() && !entity.isRemoved()) { // Paper - Ensure valid vehicle status
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// CraftBukkit end
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CompoundTag nbttagcompound2 = new CompoundTag();
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CompoundTag nbttagcompound3 = new CompoundTag();
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