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 d5004290e40a1ff5e0fcfe75f8da34ae15962359..31ae0f466ae522d767907ec5066b26695f327b96 100644
--- a/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
@@ -240,7 +240,7 @@ public class WalkNodeEvaluator extends NodeEvaluator {
                 if ((node == null || node.costMalus < 0.0F)
                     && maxYStep > 0
                     && (pathType != PathType.FENCE || this.canWalkOverFences())
-                    && pathType != PathType.UNPASSABLE_RAIL
+                    && (this.mob.level().purpurConfig.mobsIgnoreRails || pathType != PathType.UNPASSABLE_RAIL) // Purpur
                     && pathType != PathType.TRAPDOOR
                     && pathType != PathType.POWDER_SNOW) {
                     node = this.tryJumpOn(x, y, z, maxYStep, prevFeetY, direction, nodeType, mutableBlockPos);
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 791a2a91be714844d699e0c6cd15f71c31201c59..a8fa9bd998f24bdb420225b426addce5b005f8ad 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -141,6 +141,7 @@ 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);
@@ -164,6 +165,7 @@ 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;