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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
1.5 KiB
Diff
19 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: hyper1423 <backup8822@gmail.com>
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Date: Sun, 3 Dec 2023 07:38:09 +0900
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Subject: [PATCH] Fix CraftMetaItem#getAttributeModifier duplication check
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diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
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index 5c76ba7f9ceb285d27e18369172612205be96224..11f55ef2645d50bbc24bd245ffe3ac98180315d8 100644
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--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
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+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
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@@ -1412,7 +1412,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
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Preconditions.checkNotNull(modifier, "AttributeModifier cannot be null");
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this.checkAttributeList();
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for (Map.Entry<Attribute, AttributeModifier> entry : this.attributeModifiers.entries()) {
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- Preconditions.checkArgument(!entry.getValue().getKey().equals(modifier.getKey()), "Cannot register AttributeModifier. Modifier is already applied! %s", modifier);
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+ Preconditions.checkArgument(!(entry.getValue().getKey().equals(modifier.getKey()) && entry.getKey() == attribute), "Cannot register AttributeModifier. Modifier is already applied! %s", modifier); // Paper - attribute modifiers with same namespaced key but on different attributes are fine
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}
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return this.attributeModifiers.put(attribute, modifier);
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}
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