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limit the range at which we'll consider an attackable target

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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
This commit is contained in:
Shane Freeder 2018-11-26 13:23:49 +00:00
parent 3aa59b3c99
commit b5184575e6
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GPG Key ID: A3F61EA5A085289C
3 changed files with 39 additions and 4 deletions
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4
Spigot-API-Patches/0032-Add-handshake-event-to-allow-plugins-to-handle-clien.patch
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@ -1,4 +1,4 @@
From 4e0abf8c461a8e517fa30a281d90f8c60bd5686a Mon Sep 17 00:00:00 2001
From ee3ad1b0cf85252211cdb2811557bfb7da695370 Mon Sep 17 00:00:00 2001
From: kashike <kashike@vq.lc>
Date: Wed, 13 Apr 2016 20:20:18 -0700
Subject: [PATCH] Add handshake event to allow plugins to handle client
@ -223,5 +223,5 @@ index 00000000..e44d03a2
+ }
+}
--
2.18.0
2.19.1

4
Spigot-API-Patches/0033-Arrow-pickup-rule-API.patch
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@ -1,4 +1,4 @@
From 57f8f2e8bfc9419a07a28ad20fb52c13ee3e5562 Mon Sep 17 00:00:00 2001
From 5639eb8d022329ed99bb9f92f8dbe416d5e4f377 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Fri, 4 Mar 2016 03:13:18 -0500
Subject: [PATCH] Arrow pickup rule API
@ -48,5 +48,5 @@ index 99814eee..34dde443 100644
+ // Paper end
}
--
2.18.0
2.19.1

35
Spigot-Server-Patches/0413-limit-the-range-at-which-we-ll-consider-an-attackabl.patch Normal file
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@ -0,0 +1,35 @@
From 9615b6f9aa28294eb6338baf0d29e2e5fc1921bb 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 cdbb247da..027871c00 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -2795,8 +2795,13 @@ 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()) {
--
2.19.1