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c5a10665b8
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.
29 lines
2.5 KiB
Diff
29 lines
2.5 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: Mon, 1 Jan 2024 12:57:19 -0800
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Subject: [PATCH] Correctly check if bucket dispenses will succeed for event
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Upstream incorrectly checks if the bucket place will succeed
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in order to fire the BlockDispenseEvent. This patch corrects
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that.
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diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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index 32f06b29930906cdb6d3ceefa609c1a45518f80f..fb80b00b34ae5a4b1491c618a7fe1bdbbde0de9b 100644
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--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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@@ -405,7 +405,13 @@ public interface DispenseItemBehavior {
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int y = blockposition.getY();
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int z = blockposition.getZ();
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BlockState iblockdata = worldserver.getBlockState(blockposition);
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- if (iblockdata.isAir() || iblockdata.canBeReplaced() || (dispensiblecontaineritem instanceof BucketItem && iblockdata.getBlock() instanceof LiquidBlockContainer && ((LiquidBlockContainer) iblockdata.getBlock()).canPlaceLiquid((Player) null, worldserver, blockposition, iblockdata, ((BucketItem) dispensiblecontaineritem).content))) {
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+ // Paper start - correctly check if the bucket place will succeed
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+ /* Taken from SolidBucketItem#emptyContents */
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+ boolean willEmptyContentsSolidBucketItem = dispensiblecontaineritem instanceof net.minecraft.world.item.SolidBucketItem && worldserver.isInWorldBounds(blockposition) && iblockdata.isAir();
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+ /* Taken from BucketItem#emptyContents */
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+ boolean willEmptyBucketItem = dispensiblecontaineritem instanceof final BucketItem bucketItem && bucketItem.content instanceof net.minecraft.world.level.material.FlowingFluid && (iblockdata.isAir() || iblockdata.canBeReplaced(bucketItem.content) || (iblockdata.getBlock() instanceof LiquidBlockContainer liquidBlockContainer && liquidBlockContainer.canPlaceLiquid(null, worldserver, blockposition, iblockdata, bucketItem.content)));
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+ if (willEmptyContentsSolidBucketItem || willEmptyBucketItem) {
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+ // Paper end - correctly check if the bucket place will succeed
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org.bukkit.block.Block block = CraftBlock.at(worldserver, pointer.pos());
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CraftItemStack craftItem = CraftItemStack.asCraftMirror(stack);
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