From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Encode42 <me@encode42.dev>
Date: Sun, 8 Aug 2021 22:50:23 -0400
Subject: [PATCH] Config to allow mobs to pathfind over rails


diff --git a/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java b/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
index 7e62873eea85e33f81c943e70292ccb71a3dd276..b7f9793900d365f91d6e30dd22881a30e4250ac8 100644
--- a/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
@@ -259,7 +259,7 @@ public class WalkNodeEvaluator extends NodeEvaluator {
                 if ((node == null || node.costMalus < 0.0F)
                     && maxYStep > 0
                     && (blockPathTypes != BlockPathTypes.FENCE || this.canWalkOverFences())
-                    && blockPathTypes != BlockPathTypes.UNPASSABLE_RAIL
+                    && (this.mob.level().purpurConfig.mobsIgnoreRails || blockPathTypes != BlockPathTypes.UNPASSABLE_RAIL) // Purpur
                     && blockPathTypes != BlockPathTypes.TRAPDOOR
                     && blockPathTypes != BlockPathTypes.POWDER_SNOW) {
                     node = this.findAcceptedNode(x, y + 1, z, maxYStep - 1, prevFeetY, direction, nodeType);
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 0893e133393e35a6b0a66c09cb800265426ec427..7f0b09f7e7e1f294bd7d4b384c587789dd8ffb12 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -138,6 +138,7 @@ public class PurpurWorldConfig {
     public double voidDamageDealt = 4.0D;
     public int raidCooldownSeconds = 0;
     public int animalBreedingCooldownSeconds = 0;
+    public boolean mobsIgnoreRails = false;
     private void miscGameplayMechanicsSettings() {
         useBetterMending = getBoolean("gameplay-mechanics.use-better-mending", useBetterMending);
         alwaysTameInCreative = getBoolean("gameplay-mechanics.always-tame-in-creative", alwaysTameInCreative);
@@ -159,6 +160,7 @@ public class PurpurWorldConfig {
         voidDamageDealt = getDouble("gameplay-mechanics.void-damage-dealt", voidDamageDealt);
         raidCooldownSeconds = getInt("gameplay-mechanics.raid-cooldown-seconds", raidCooldownSeconds);
         animalBreedingCooldownSeconds = getInt("gameplay-mechanics.animal-breeding-cooldown-seconds", animalBreedingCooldownSeconds);
+        mobsIgnoreRails = getBoolean("gameplay-mechanics.mobs-ignore-rails", mobsIgnoreRails);
     }
 
     public int daytimeTicks = 12000;