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Paper/patches/server/0696-Fire-CauldronLevelChange-on-initial-fill.patch
Bjarne Koll c5a10665b8
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.
2024-09-19 16:36:07 +02:00

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Raw Blame History

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Tue, 29 Mar 2022 13:46:23 -0700
Subject: [PATCH] Fire CauldronLevelChange on initial fill
Also don't fire level events or game events if stalactite
drip is cancelled
diff --git a/src/main/java/net/minecraft/core/cauldron/CauldronInteraction.java b/src/main/java/net/minecraft/core/cauldron/CauldronInteraction.java
index 9ebd5310ee358acd83123a30415d9f7eb6aa36d9..f301c20e808b77cb3fcffd9a7c8102928306456e 100644
--- a/src/main/java/net/minecraft/core/cauldron/CauldronInteraction.java
+++ b/src/main/java/net/minecraft/core/cauldron/CauldronInteraction.java
@@ -81,7 +81,7 @@ public interface CauldronInteraction {
if (potioncontents != null && potioncontents.is(Potions.WATER)) {
if (!world.isClientSide) {
// CraftBukkit start
- if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, Blocks.WATER_CAULDRON.defaultBlockState(), entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_EMPTY)) {
+ if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, Blocks.WATER_CAULDRON.defaultBlockState(), entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_EMPTY, false)) { // Paper - Call CauldronLevelChangeEvent
return ItemInteractionResult.SUCCESS;
}
// CraftBukkit end
@@ -136,7 +136,7 @@ public interface CauldronInteraction {
if (potioncontents != null && potioncontents.is(Potions.WATER)) {
if (!world.isClientSide) {
// CraftBukkit start
- if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, iblockdata.cycle(LayeredCauldronBlock.LEVEL), entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_EMPTY)) {
+ if (!LayeredCauldronBlock.changeLevel(iblockdata, world, blockposition, iblockdata.cycle(LayeredCauldronBlock.LEVEL), entityhuman, CauldronLevelChangeEvent.ChangeReason.BOTTLE_EMPTY, false)) { // Paper - Call CauldronLevelChangeEvent
return ItemInteractionResult.SUCCESS;
}
// CraftBukkit end
@@ -222,7 +222,7 @@ public interface CauldronInteraction {
} else {
if (!world.isClientSide) {
// CraftBukkit start
- if (!LayeredCauldronBlock.changeLevel(state, world, pos, Blocks.CAULDRON.defaultBlockState(), player, CauldronLevelChangeEvent.ChangeReason.BUCKET_FILL)) {
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, Blocks.CAULDRON.defaultBlockState(), player, CauldronLevelChangeEvent.ChangeReason.BUCKET_FILL, false)) { // Paper - Call CauldronLevelChangeEvent
return ItemInteractionResult.SUCCESS;
}
// CraftBukkit end
@@ -243,7 +243,7 @@ public interface CauldronInteraction {
static ItemInteractionResult emptyBucket(Level world, BlockPos pos, Player player, InteractionHand hand, ItemStack stack, BlockState state, SoundEvent soundEvent) {
if (!world.isClientSide) {
// CraftBukkit start
- if (!LayeredCauldronBlock.changeLevel(state, world, pos, state, player, CauldronLevelChangeEvent.ChangeReason.BUCKET_EMPTY)) {
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, state, player, CauldronLevelChangeEvent.ChangeReason.BUCKET_EMPTY, false)) { // Paper - Call CauldronLevelChangeEvent
return ItemInteractionResult.SUCCESS;
}
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/level/block/CauldronBlock.java b/src/main/java/net/minecraft/world/level/block/CauldronBlock.java
index 8d5ad9848d9652b4fd7179c425c47a683ee169ef..c9968934f4ecaa8d81e545f279b3001c7b1ce545 100644
--- a/src/main/java/net/minecraft/world/level/block/CauldronBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/CauldronBlock.java
@@ -44,9 +44,19 @@ public class CauldronBlock extends AbstractCauldronBlock {
public void handlePrecipitation(BlockState state, Level world, BlockPos pos, Biome.Precipitation precipitation) {
if (CauldronBlock.shouldHandlePrecipitation(world, precipitation)) {
if (precipitation == Biome.Precipitation.RAIN) {
+ // Paper start - Call CauldronLevelChangeEvent
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, Blocks.WATER_CAULDRON.defaultBlockState(), null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL, false)) { // avoid duplicate game event
+ return;
+ }
+ // Paper end - Call CauldronLevelChangeEvent
world.setBlockAndUpdate(pos, Blocks.WATER_CAULDRON.defaultBlockState());
world.gameEvent((Entity) null, (Holder) GameEvent.BLOCK_CHANGE, pos);
} else if (precipitation == Biome.Precipitation.SNOW) {
+ // Paper start - Call CauldronLevelChangeEvent
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, Blocks.POWDER_SNOW_CAULDRON.defaultBlockState(), null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL, false)) { // avoid duplicate game event
+ return;
+ }
+ // Paper end - Call CauldronLevelChangeEvent
world.setBlockAndUpdate(pos, Blocks.POWDER_SNOW_CAULDRON.defaultBlockState());
world.gameEvent((Entity) null, (Holder) GameEvent.BLOCK_CHANGE, pos);
}
@@ -65,11 +75,19 @@ public class CauldronBlock extends AbstractCauldronBlock {
if (fluid == Fluids.WATER) {
iblockdata1 = Blocks.WATER_CAULDRON.defaultBlockState();
- LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL); // CraftBukkit
+ // Paper start - Call CauldronLevelChangeEvent; don't send level event or game event if cancelled
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL)) { // CraftBukkit
+ return;
+ }
+ // Paper end - Call CauldronLevelChangeEvent
world.levelEvent(1047, pos, 0);
} else if (fluid == Fluids.LAVA) {
iblockdata1 = Blocks.LAVA_CAULDRON.defaultBlockState();
- LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL); // CraftBukkit
+ // Paper start - Call CauldronLevelChangeEvent; don't send level event or game event if cancelled
+ if (!LayeredCauldronBlock.changeLevel(state, world, pos, iblockdata1, null, CauldronLevelChangeEvent.ChangeReason.NATURAL_FILL)) { // CraftBukkit
+ return;
+ }
+ // Paper end - Call CauldronLevelChangeEvent
world.levelEvent(1046, pos, 0);
}
diff --git a/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java b/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
index 7c67efa6e344870b764eb39d5508190349e2e911..b222ac8e5b966c515be2aca86083f5640853cd29 100644
--- a/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
@@ -102,7 +102,13 @@ public class LayeredCauldronBlock extends AbstractCauldronBlock {
}
// CraftBukkit start
- public static boolean changeLevel(BlockState iblockdata, Level world, BlockPos blockposition, BlockState newBlock, Entity entity, CauldronLevelChangeEvent.ChangeReason reason) {
+ // Paper start - Call CauldronLevelChangeEvent
+ public static boolean changeLevel(BlockState iblockdata, Level world, BlockPos blockposition, BlockState newBlock, @javax.annotation.Nullable Entity entity, CauldronLevelChangeEvent.ChangeReason reason) { // Paper - entity is nullable
+ return changeLevel(iblockdata, world, blockposition, newBlock, entity, reason, true);
+ }
+
+ public static boolean changeLevel(BlockState iblockdata, Level world, BlockPos blockposition, BlockState newBlock, @javax.annotation.Nullable Entity entity, CauldronLevelChangeEvent.ChangeReason reason, boolean sendGameEvent) { // Paper - entity is nullable
+ // Paper end - Call CauldronLevelChangeEvent
CraftBlockState newState = CraftBlockStates.getBlockState(world, blockposition);
newState.setData(newBlock);
@@ -115,7 +121,7 @@ public class LayeredCauldronBlock extends AbstractCauldronBlock {
return false;
}
newState.update(true);
- world.gameEvent((Holder) GameEvent.BLOCK_CHANGE, blockposition, GameEvent.Context.of(newBlock));
+ if (sendGameEvent) world.gameEvent((Holder) GameEvent.BLOCK_CHANGE, blockposition, GameEvent.Context.of(newBlock)); // Paper - Call CauldronLevelChangeEvent
return true;
}
// CraftBukkit end
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