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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.
34 lines
1.7 KiB
Diff
34 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: William Blake Galbreath <Blake.Galbreath@GMail.com>
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Date: Sun, 26 Jan 2020 16:30:19 -0600
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Subject: [PATCH] Bees get gravity in void. Fixes MC-167279
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diff --git a/src/main/java/net/minecraft/world/entity/animal/Bee.java b/src/main/java/net/minecraft/world/entity/animal/Bee.java
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index 58536ee8707c5ad0625cae2f26a58cf03b3f85d7..4134ee48909110f8c338f5d553d4cc1e9e31aaba 100644
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--- a/src/main/java/net/minecraft/world/entity/animal/Bee.java
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+++ b/src/main/java/net/minecraft/world/entity/animal/Bee.java
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@@ -144,7 +144,22 @@ public class Bee extends Animal implements NeutralMob, FlyingAnimal {
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public Bee(EntityType<? extends Bee> type, Level world) {
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super(type, world);
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this.remainingCooldownBeforeLocatingNewFlower = Mth.nextInt(this.random, 20, 60);
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- this.moveControl = new FlyingMoveControl(this, 20, true);
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+ // Paper start - Fix MC-167279
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+ class BeeFlyingMoveControl extends FlyingMoveControl {
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+ public BeeFlyingMoveControl(final Mob entity, final int maxPitchChange, final boolean noGravity) {
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+ super(entity, maxPitchChange, noGravity);
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+ }
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+
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+ @Override
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+ public void tick() {
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+ if (this.mob.getY() <= Bee.this.level().getMinBuildHeight()) {
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+ this.mob.setNoGravity(false);
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+ }
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+ super.tick();
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+ }
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+ }
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+ this.moveControl = new BeeFlyingMoveControl(this, 20, true);
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+ // Paper end - Fix MC-167279
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this.lookControl = new Bee.BeeLookControl(this);
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this.setPathfindingMalus(PathType.DANGER_FIRE, -1.0F);
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this.setPathfindingMalus(PathType.WATER, -1.0F);
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