Paper/Spigot-Server-Patches/0404-limit-the-range-at-which-we-ll-consider-an-attackabl.patch
Shane Freeder 2828dd1c67 Revert "Don't update snapshot blockstates" (Fixes #1882)
CraftBukkit already checks that we're not trying to copy data
back to the same snapshot, reverting this fixes the ability to
properly update non-snapshot blockstates
2019-03-07 17:21:02 +00:00

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From 234636ca2d4f795adb5063070ae7ded816b17954 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Tue, 13 Nov 2018 14:01:00 +0000
Subject: [PATCH] limit the range at which we'll consider an attackable target
This patch aims to ensure that MCP World#getNearestAttackablePlayer
will not trigger chunk loads due to PathfinderGoalNearestAttackableTarget
performing a ray trace operation by pre-checking the maximum limit;
Given that the implementation shows that the limit should only ever
decrease when set, allowing us to skip further checks earlier on
when looking for an attackable entity
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 2f12e35ac..a7f6288f5 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -2729,8 +2729,13 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
for (int i = 0; i < this.players.size(); ++i) {
EntityHuman entityhuman1 = (EntityHuman) this.players.get(i);
+ // Paper start
+ // move distance check up, if set, check distance^2 is less than XZlimit^2, continue
+ // 4th method param is XZlimit (at least at the time of commit)
+ double d6 = entityhuman1.d(d0, entityhuman1.locY, d2);
+ if (d3 < 0.0D || d6 < d3 * d3)
if (!entityhuman1.abilities.isInvulnerable && entityhuman1.isAlive() && !entityhuman1.isSpectator() && (predicate == null || predicate.test(entityhuman1))) {
- double d6 = entityhuman1.d(d0, entityhuman1.locY, d2);
+ // Paper end
double d7 = d3;
if (entityhuman1.isSneaking()) {
--
2.21.0