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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.
25 Zeilen
1.7 KiB
Diff
25 Zeilen
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Mon, 14 Mar 2022 12:35:37 -0700
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Subject: [PATCH] Don't allow vehicle movement from players while teleporting
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Bring the vehicle move packet behavior in line with the
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regular player move packet.
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 1e806fd16ca5f90bdb4f71dea008d7936eb82562..76c9feb5e1389eb929571de74ececd4a4f384453 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -484,6 +484,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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this.disconnect((Component) Component.translatable("multiplayer.disconnect.invalid_vehicle_movement"), org.bukkit.event.player.PlayerKickEvent.Cause.INVALID_VEHICLE_MOVEMENT); // Paper - kick event cause
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} else if (!this.updateAwaitingTeleport()) {
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Entity entity = this.player.getRootVehicle();
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+ // Paper start - Don't allow vehicle movement from players while teleporting
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+ if (this.awaitingPositionFromClient != null || this.player.isImmobile() || entity.isRemoved()) {
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+ return;
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+ }
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+ // Paper end - Don't allow vehicle movement from players while teleporting
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if (entity != this.player && entity.getControllingPassenger() == this.player && entity == this.lastVehicle) {
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ServerLevel worldserver = this.player.serverLevel();
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