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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.
41 lines
2.2 KiB
Diff
41 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Malfrador <malfrador@gmail.com>
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Date: Wed, 31 May 2023 23:30:00 +0200
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Subject: [PATCH] Add transient modifier API
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diff --git a/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java
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index 12135ffeacd648f6bc4d7d327059ea1a7e8c79c4..52439f4b959c74027eb191a3af960c70beb978e8 100644
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--- a/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java
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+++ b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java
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@@ -23,6 +23,11 @@ public class UnmodifiableAttributeInstance extends CraftAttributeInstance {
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throw new UnsupportedOperationException("Cannot modify default attributes");
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}
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+ @Override
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+ public void addTransientModifier(AttributeModifier modifier) {
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+ throw new UnsupportedOperationException("Cannot modify default attributes");
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+ }
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+
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@Override
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public void removeModifier(AttributeModifier modifier) {
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throw new UnsupportedOperationException("Cannot modify default attributes");
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diff --git a/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java b/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java
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index 3b171a08bd0bedfe224905feb5838d2540199bce..cd6a492f56b3dee5985c068e20009b6c833e143b 100644
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--- a/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java
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+++ b/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java
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@@ -51,6 +51,14 @@ public class CraftAttributeInstance implements AttributeInstance {
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this.handle.addPermanentModifier(CraftAttributeInstance.convert(modifier));
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}
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+ // Paper start - Transient modifier API
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+ @Override
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+ public void addTransientModifier(AttributeModifier modifier) {
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+ Preconditions.checkArgument(modifier != null, "modifier");
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+ this.handle.addTransientModifier(CraftAttributeInstance.convert(modifier));
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+ }
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+ // Paper end
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+
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@Override
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public void removeModifier(AttributeModifier modifier) {
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Preconditions.checkArgument(modifier != null, "modifier");
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