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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.
19 Zeilen
1.1 KiB
Diff
19 Zeilen
1.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Sat, 7 Mar 2020 00:07:51 +0000
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Subject: [PATCH] Validate tripwire hook placement before update
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diff --git a/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java b/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
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index bc4d324f086d815c139408629a561ea4d94c839b..8614fad5b3df7a6030384b108b1689bf6b9f1209 100644
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--- a/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
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+++ b/src/main/java/net/minecraft/world/level/block/TripWireHookBlock.java
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@@ -189,6 +189,7 @@ public class TripWireHookBlock extends Block {
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TripWireHookBlock.emitState(world, pos, flag4, flag5, flag2, flag3);
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if (!flag) {
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+ if (world.getBlockState(pos).getBlock() == Blocks.TRIPWIRE_HOOK) // Paper - Validate tripwire hook placement before update
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world.setBlock(pos, (BlockState) iblockdata3.setValue(TripWireHookBlock.FACING, enumdirection), 3);
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if (flag1) {
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TripWireHookBlock.notifyNeighbors(block, world, pos, enumdirection);
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