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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.
25 lines
1.7 KiB
Diff
25 lines
1.7 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: Wed, 12 May 2021 04:30:42 -0700
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Subject: [PATCH] Add EntityPortalReadyEvent
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diff --git a/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java b/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java
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index e2969b49494c55c3705312361ee8083b05ef569e..417a9ab28d247d5fbb3f1097fdeccab7ad2a793b 100644
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--- a/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java
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+++ b/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java
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@@ -133,6 +133,14 @@ public class NetherPortalBlock extends Block implements Portal {
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// CraftBukkit start
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ResourceKey<Level> resourcekey = world.getTypeKey() == LevelStem.NETHER ? Level.OVERWORLD : Level.NETHER;
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ServerLevel worldserver1 = world.getServer().getLevel(resourcekey);
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+ // Paper start - Add EntityPortalReadyEvent
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+ io.papermc.paper.event.entity.EntityPortalReadyEvent portalReadyEvent = new io.papermc.paper.event.entity.EntityPortalReadyEvent(entity.getBukkitEntity(), worldserver1 == null ? null : worldserver1.getWorld(), org.bukkit.PortalType.NETHER);
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+ if (!portalReadyEvent.callEvent()) {
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+ entity.portalProcess = null;
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+ return null;
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+ }
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+ worldserver1 = portalReadyEvent.getTargetWorld() == null ? null : ((org.bukkit.craftbukkit.CraftWorld) portalReadyEvent.getTargetWorld()).getHandle();
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+ // Paper end - Add EntityPortalReadyEvent
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if (worldserver1 == null) {
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return new DimensionTransition(PlayerTeleportEvent.TeleportCause.NETHER_PORTAL); // always fire event in case plugins wish to change it
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