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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
1.4 KiB
Diff
19 Zeilen
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: chickeneer <emcchickeneer@gmail.com>
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Date: Thu, 22 Apr 2021 19:02:07 -0700
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Subject: [PATCH] fix PlayerItemHeldEvent firing twice
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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 403b2499374906daa0ca2bb774522f92e186e6d5..276c0b017452a1d7b60a2a8e779f2f3fcf4960cc 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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@@ -1933,6 +1933,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
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if (this.player.isImmobile()) return; // CraftBukkit
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if (packet.getSlot() >= 0 && packet.getSlot() < Inventory.getSelectionSize()) {
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+ if (packet.getSlot() == this.player.getInventory().selected) { return; } // Paper - don't fire itemheldevent when there wasn't a slot change
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PlayerItemHeldEvent event = new PlayerItemHeldEvent(this.getCraftPlayer(), this.player.getInventory().selected, packet.getSlot());
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this.cserver.getPluginManager().callEvent(event);
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if (event.isCancelled()) {
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