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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.
26 Zeilen
1.4 KiB
Diff
26 Zeilen
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: GioSDA <gsdambrosio@gmail.com>
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Date: Wed, 10 Mar 2021 10:06:45 -0800
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Subject: [PATCH] Add option to fix items merging through walls
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diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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index c724359995d65c88e7f365eea55f3e4382a46ddd..df90d5b934f41f5d8c232e93830d6690b6ccf401 100644
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--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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@@ -282,6 +282,14 @@ public class ItemEntity extends Entity implements TraceableEntity {
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ItemEntity entityitem = (ItemEntity) iterator.next();
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if (entityitem.isMergable()) {
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+ // Paper start - Fix items merging through walls
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+ if (this.level().paperConfig().fixes.fixItemsMergingThroughWalls) {
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+ if (this.level().clipDirect(this.position(), entityitem.position(),
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+ net.minecraft.world.phys.shapes.CollisionContext.of(this)) == net.minecraft.world.phys.HitResult.Type.BLOCK) {
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+ continue;
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+ }
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+ }
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+ // Paper end - Fix items merging through walls
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this.tryToMerge(entityitem);
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if (this.isRemoved()) {
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break;
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