Remove wall-time / unused skip tick protection (#11412)
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.
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patches/server/0396-Add-moon-phase-API.patch
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patches/server/0396-Add-moon-phase-API.patch
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@ -0,0 +1,22 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: BillyGalbreath <Blake.Galbreath@GMail.com>
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Date: Sun, 23 Aug 2020 16:32:11 +0200
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Subject: [PATCH] Add moon phase API
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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index 454f3a08c4d319f3d3fe2b1209c4d8b9fa9d4d08..1963e826548c5a8859c50f57654784c3aef50e44 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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@@ -509,4 +509,11 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
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throw new IllegalArgumentException("Cannot spawn an entity for " + clazz.getName());
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}
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+
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+ // Paper start
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+ @Override
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+ public io.papermc.paper.world.MoonPhase getMoonPhase() {
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+ return io.papermc.paper.world.MoonPhase.getPhase(this.getHandle().dayTime() / 24000L);
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+ }
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+ // Paper end
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}
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