From 270807a1f8c7638d0a365fee70ece496a2c64869 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 803e68089..be380ac75 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -229,4 +229,12 @@ public class PaperWorldConfig {
         log("Non Player Arrow Despawn Rate: " + nonPlayerArrowDespawnRate);
         log("Creative Arrow Despawn Rate: " + creativeArrowDespawnRate);
     }
+
+    public double skeleHorseSpawnChance;
+    private void skeleHorseSpawnChance() {
+        skeleHorseSpawnChance = getDouble("skeleton-horse-thunder-spawn-chance", 0.01D);
+        if (skeleHorseSpawnChance < 0) {
+            skeleHorseSpawnChance = 0.01D; // Vanilla value
+        }
+    }
 }
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index ed6f3afcf..aaeb888a8 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -480,7 +480,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
                     blockposition = this.a(new BlockPosition(j + (l & 15), 0, k + (l >> 8 & 15)));
                     if (this.isRainingAt(blockposition)) {
                         DifficultyDamageScaler difficultydamagescaler = this.getDamageScaler(blockposition);
-                        boolean flag2 = this.getGameRules().getBoolean("doMobSpawning") && this.random.nextDouble() < (double) difficultydamagescaler.b() * 0.01D;
+                        boolean flag2 = this.getGameRules().getBoolean("doMobSpawning") && this.random.nextDouble() < (double) difficultydamagescaler.b() * paperConfig.skeleHorseSpawnChance; // Paper
 
                         if (flag2) {
                             EntityHorseSkeleton entityhorseskeleton = new EntityHorseSkeleton(this);
-- 
2.21.0