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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 KiB
Diff
19 lines
1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Mon, 4 Oct 2021 22:31:51 -0700
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Subject: [PATCH] Fix CraftCriteria defaults map
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diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftCriteria.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftCriteria.java
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index 441e2122f837712a21328eb7659cc9925ff9b6f8..8464531a4ee400834d25c23b1eb723f49be8689e 100644
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--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftCriteria.java
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+++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftCriteria.java
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@@ -54,7 +54,7 @@ public final class CraftCriteria implements Criteria {
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}
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static CraftCriteria getFromNMS(Objective objective) {
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- return CraftCriteria.DEFAULTS.get(objective.getCriteria().getName());
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+ return java.util.Objects.requireNonNullElseGet(CraftCriteria.DEFAULTS.get(objective.getCriteria().getName()), () -> new CraftCriteria(objective.getCriteria())); // Paper
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}
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public static CraftCriteria getFromBukkit(String name) {
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