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c5a10665b8
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.
32 lines
1.5 KiB
Diff
32 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aeltumn <daniel@goossens.ch>
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Date: Mon, 28 Aug 2023 13:44:09 +0200
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Subject: [PATCH] Allow proper checking of empty item stacks
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diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
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index 4d29c34e221b749b6972c7ed79ac1f86da999ed7..c5a09f086d35f84c0a30266f78e06e2dfb5603e6 100644
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--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
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+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
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@@ -40,12 +40,19 @@ public final class CraftItemStack extends ItemStack {
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}
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// Paper end - MC Utils
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+ // Paper start - override isEmpty to use vanilla's impl
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+ @Override
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+ public boolean isEmpty() {
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+ return handle == null || handle.isEmpty();
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+ }
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+ // Paper end - override isEmpty to use vanilla's impl
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+
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public static net.minecraft.world.item.ItemStack asNMSCopy(ItemStack original) {
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if (original instanceof CraftItemStack) {
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CraftItemStack stack = (CraftItemStack) original;
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return stack.handle == null ? net.minecraft.world.item.ItemStack.EMPTY : stack.handle.copy();
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}
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- if (original == null || original.getType() == Material.AIR) {
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+ if (original == null || original.isEmpty()) { // Paper - override isEmpty to use vanilla's impl; use isEmpty
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return net.minecraft.world.item.ItemStack.EMPTY;
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}
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