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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 Zeilen
1.1 KiB
Diff
19 Zeilen
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Tue, 30 Nov 2021 05:30:35 +0000
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Subject: [PATCH] Prevent ContainerOpenersCounter openCount from going negative
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diff --git a/src/main/java/net/minecraft/world/level/block/entity/ContainerOpenersCounter.java b/src/main/java/net/minecraft/world/level/block/entity/ContainerOpenersCounter.java
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index 43e4e893f0e7eed1959e6ccfa43c39ff00f083b3..86dce6796f92a5b0ae2b1bd837267c4e3f6754d0 100644
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--- a/src/main/java/net/minecraft/world/level/block/entity/ContainerOpenersCounter.java
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+++ b/src/main/java/net/minecraft/world/level/block/entity/ContainerOpenersCounter.java
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@@ -69,6 +69,7 @@ public abstract class ContainerOpenersCounter {
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public void decrementOpeners(Player player, Level world, BlockPos pos, BlockState state) {
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int oldPower = Math.max(0, Math.min(15, this.openCount)); // CraftBukkit - Get power before new viewer is added
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+ if (this.openCount == 0) return; // Paper - Prevent ContainerOpenersCounter openCount from going negative
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int i = this.openCount--;
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// CraftBukkit start - Call redstone event
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