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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
1.2 KiB
Diff
19 lines
1.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Tue, 24 Dec 2019 00:35:42 +0000
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Subject: [PATCH] PlayerDeathEvent#shouldDropExperience
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diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index cba123f40d72ebd39305a76694be508510997d1e..4ccb5ba03d19223d25aee4cebd4b8bec2838a3e0 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -1018,7 +1018,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
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this.tellNeutralMobsThatIDied();
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}
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// SPIGOT-5478 must be called manually now
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- this.dropExperience(damageSource.getEntity());
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+ if (event.shouldDropExperience()) this.dropExperience(damageSource.getEntity()); // Paper - tie to event
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// we clean the player's inventory after the EntityDeathEvent is called so plugins can get the exact state of the inventory.
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if (!event.getKeepInventory()) {
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// Paper start - PlayerDeathEvent#getItemsToKeep
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