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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.
40 lines
2 KiB
Diff
40 lines
2 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: Sat, 19 Feb 2022 19:05:59 -0800
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Subject: [PATCH] Fix cancelling ProjectileHitEvent for piercing arrows
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Piercing arrows search for multiple entities inside a while
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loop that is checking the projectile entity's removed state.
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If the hit event is cancelled on the first entity, the event will
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be called over and over again inside that while loop until the event
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is not cancelled. The solution here, is to make use of an
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already-existing field on AbstractArrow for tracking entities hit by
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piercing arrows to avoid duplicate damage being applied.
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== AT ==
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protected net.minecraft.world.entity.projectile.Projectile hitCancelled
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diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
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index 57ebb96707748e90810dc07471f9769f1317df9d..10d30304c8c89b1f2a55be8529035311d1424e44 100644
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--- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
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+++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
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@@ -329,6 +329,19 @@ public abstract class AbstractArrow extends Projectile {
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}
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}
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+ // Paper start - Fix cancelling ProjectileHitEvent for piercing arrows
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+ @Override
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+ public ProjectileDeflection preHitTargetOrDeflectSelf(HitResult hitResult) {
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+ if (hitResult instanceof EntityHitResult entityHitResult && this.hitCancelled && this.getPierceLevel() > 0) {
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+ if (this.piercingIgnoreEntityIds == null) {
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+ this.piercingIgnoreEntityIds = new IntOpenHashSet(5);
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+ }
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+ this.piercingIgnoreEntityIds.add(entityHitResult.getEntity().getId());
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+ }
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+ return super.preHitTargetOrDeflectSelf(hitResult);
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+ }
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+ // Paper end - Fix cancelling ProjectileHitEvent for piercing arrows
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+
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@Override
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protected double getDefaultGravity() {
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return 0.05D;
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