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/0319-add-hand-to-BlockMultiPlaceEvent.patch
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patches/server/0319-add-hand-to-BlockMultiPlaceEvent.patch
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@ -0,0 +1,30 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Trigary <trigary0@gmail.com>
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Date: Sun, 1 Mar 2020 22:43:24 +0100
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Subject: [PATCH] add hand to BlockMultiPlaceEvent
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diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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index 8172a75aef7c3dcdd92817f148466a4cad4c78ed..235ac5c12dab593da3a40e348a010ff626ce74a3 100644
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--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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@@ -412,13 +412,18 @@ public class CraftEventFactory {
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}
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org.bukkit.inventory.ItemStack item;
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+ // Paper start - add hand to BlockMultiPlaceEvent
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+ EquipmentSlot equipmentSlot;
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if (hand == InteractionHand.MAIN_HAND) {
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item = player.getInventory().getItemInMainHand();
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+ equipmentSlot = EquipmentSlot.HAND;
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} else {
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item = player.getInventory().getItemInOffHand();
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+ equipmentSlot = EquipmentSlot.OFF_HAND;
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}
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- BlockMultiPlaceEvent event = new BlockMultiPlaceEvent(blockStates, blockClicked, item, player, canBuild);
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+ BlockMultiPlaceEvent event = new BlockMultiPlaceEvent(blockStates, blockClicked, item, player, canBuild, equipmentSlot);
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+ // Paper end
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craftServer.getPluginManager().callEvent(event);
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return event;
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