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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.
22 lines
1.3 KiB
Diff
22 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Nassim Jahnke <nassim@njahnke.dev>
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Date: Wed, 8 Jun 2022 10:52:18 +0200
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Subject: [PATCH] Move range check for block placing up
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 9781047aa5e0a6e6bc9f9c43a1eb347b6ecdff66..39e74591d3aaa7fecb0ed6f4213a5f4c60360b0e 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -1745,6 +1745,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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if (itemstack.isItemEnabled(worldserver.enabledFeatures())) {
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BlockHitResult movingobjectpositionblock = packet.getHitResult();
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Vec3 vec3d = movingobjectpositionblock.getLocation();
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+ // Paper start - improve distance check
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+ if (!Double.isFinite(vec3d.x) || !Double.isFinite(vec3d.y) || !Double.isFinite(vec3d.z)) {
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+ return;
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+ }
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+ // Paper end - improve distance check
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BlockPos blockposition = movingobjectpositionblock.getBlockPos();
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if (this.player.canInteractWithBlock(blockposition, 1.0D)) {
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