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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.
39 Zeilen
1.7 KiB
Diff
39 Zeilen
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: MeFisto94 <MeFisto94@users.noreply.github.com>
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Date: Fri, 28 Aug 2020 01:41:26 +0200
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Subject: [PATCH] Expose the Entity Counter to allow plugins to use valid and
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non-conflicting Entity Ids
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index f1383906dbd16e088f57c9c77c051c8501b155cc..c01a9305eb1c3e2ee5effab1e11980c2540d3c2a 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -4508,4 +4508,10 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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void accept(Entity entity, double x, double y, double z);
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}
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+
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+ // Paper start - Expose entity id counter
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+ public static int nextEntityId() {
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+ return ENTITY_COUNTER.incrementAndGet();
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+ }
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+ // Paper end - Expose entity id counter
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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index af706146a26ede6b9f5a39c8deb490ff25334ae6..a557b40e1807933cf510ea489ebcab4a19c066c1 100644
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--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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@@ -505,6 +505,11 @@ public final class CraftMagicNumbers implements UnsafeValues {
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Preconditions.checkArgument(dataVersion <= getDataVersion(), "Newer version! Server downgrades are not supported!");
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return compound;
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}
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+
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+ @Override
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+ public int nextEntityId() {
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+ return net.minecraft.world.entity.Entity.nextEntityId();
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+ }
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// Paper end
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@Override
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