From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <blake.galbreath@gmail.com>
Date: Tue, 28 Dec 2021 10:11:31 -0600
Subject: [PATCH] Option to prevent spiders from climbing world border


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index f09f233c2005b600feffee27237ce01c6207b255..d58de23619321fadad3755f6110954ac462bbba1 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -243,6 +243,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     public boolean verticalCollision;
     public boolean verticalCollisionBelow;
     public boolean minorHorizontalCollision;
+    public boolean collidingWithWorldBorder; // Purpur
     public boolean hurtMarked;
     protected Vec3 stuckSpeedMultiplier;
     @Nullable
@@ -1334,7 +1335,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
             io.papermc.paper.util.CollisionUtil.getCollisions(world, this, collisionBox, potentialCollisions, false, true,
                 false, false, null, null);
 
-            if (io.papermc.paper.util.CollisionUtil.isCollidingWithBorderEdge(world.getWorldBorder(), collisionBox)) {
+            if (this.collidingWithWorldBorder = io.papermc.paper.util.CollisionUtil.isCollidingWithBorderEdge(world.getWorldBorder(), collisionBox)) { // Purpur
                 io.papermc.paper.util.CollisionUtil.addBoxesToIfIntersects(world.getWorldBorder().getCollisionShape(), collisionBox, potentialCollisions);
             }
 
diff --git a/src/main/java/net/minecraft/world/entity/monster/Spider.java b/src/main/java/net/minecraft/world/entity/monster/Spider.java
index 177f9fe0d0a10e5d3644805751f2050fe984fde7..07dc3b10a275895f23fcf50720ef25faea358c58 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Spider.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Spider.java
@@ -118,7 +118,7 @@ public class Spider extends Monster {
     public void tick() {
         super.tick();
         if (!this.level.isClientSide) {
-            this.setClimbing(this.horizontalCollision);
+            this.setClimbing(this.horizontalCollision && (this.level.purpurConfig.spiderCanClimbWorldBorder || !this.collidingWithWorldBorder)); // Purpur
         }
 
     }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index d28424cc74068904f0a3479789307f9529b03efa..b7edb6045624efa24929ab3d3b583b5237e7015c 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -2462,6 +2462,7 @@ public class PurpurWorldConfig {
     public double spiderMaxHealth = 16.0D;
     public boolean spiderTakeDamageFromWater = false;
     public boolean spiderAlwaysDropExp = false;
+    public boolean spiderCanClimbWorldBorder = true;
     private void spiderSettings() {
         spiderRidable = getBoolean("mobs.spider.ridable", spiderRidable);
         spiderRidableInWater = getBoolean("mobs.spider.ridable-in-water", spiderRidableInWater);
@@ -2474,6 +2475,7 @@ public class PurpurWorldConfig {
         spiderMaxHealth = getDouble("mobs.spider.attributes.max_health", spiderMaxHealth);
         spiderTakeDamageFromWater = getBoolean("mobs.spider.takes-damage-from-water", spiderTakeDamageFromWater);
         spiderAlwaysDropExp = getBoolean("mobs.spider.always-drop-exp", spiderAlwaysDropExp);
+        spiderCanClimbWorldBorder = getBoolean("mobs.spider.can-climb-world-border", spiderCanClimbWorldBorder);
     }
 
     public boolean strayRidable = false;