From c186b41eb75af263e81c093dc4bc3a7db435a8ab Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 22 Mar 2016 12:04:28 -0500
Subject: [PATCH] Configurable spawn chances for skeleton horses


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 0de3007392..c2c33d75bf 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -212,4 +212,9 @@ public class PaperWorldConfig {
         }
         log("Non Player Arrow Despawn Rate: " + nonPlayerArrowDespawnRate);
     }
+
+    public double skeleHorseSpawnChance;
+    private void skeleHorseSpawnChance() {
+        skeleHorseSpawnChance = getDouble("skeleton-horse-thunder-spawn-chance", 0.01D); // -1.0D represents a "vanilla" state
+    }
 }
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index dd09ab20e7..ecee3b4064 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -498,7 +498,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
                     if (this.isRainingAt(blockposition)) {
                         DifficultyDamageScaler difficultydamagescaler = this.getDamageScaler(blockposition);
 
-                        if (this.getGameRules().getBoolean("doMobSpawning") && this.random.nextDouble() < (double) difficultydamagescaler.b() * 0.01D) {
+                        if (this.getGameRules().getBoolean("doMobSpawning") && this.random.nextDouble() < (double) difficultydamagescaler.b() * paperConfig.skeleHorseSpawnChance) {
                             EntityHorseSkeleton entityhorseskeleton = new EntityHorseSkeleton(this);
 
                             entityhorseskeleton.s(true);
-- 
2.18.0