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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.
22 lines
937 B
Diff
22 lines
937 B
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: William Blake Galbreath <blake.galbreath@gmail.com>
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Date: Sat, 20 Apr 2019 19:47:34 -0500
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Subject: [PATCH] Expose the internal current tick
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index 6b63938514977f8fdfb019d55f8da28718f4cf1c..ae4e3c137498ff390c8cae7315c7ebfe125efc35 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -2915,5 +2915,10 @@ public final class CraftServer implements Server {
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profile.getGameProfile().getProperties().putAll(((CraftPlayer) player).getHandle().getGameProfile().getProperties());
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return profile;
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}
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+
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+ @Override
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+ public int getCurrentTick() {
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+ return net.minecraft.server.MinecraftServer.currentTick;
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+ }
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// Paper end
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}
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