From eca7fb22dcc48a6590945d03ae49a7ea0a348046 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 1 Mar 2016 13:24:16 -0600
Subject: [PATCH] Allow nerfed mobs to jump


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index a55163a45..341038fc4 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -87,4 +87,9 @@ public class PaperWorldConfig {
         fishingMaxTicks = getInt("fishing-time-range.MaximumTicks", 600);
         log("Fishing time ranges are between " + fishingMinTicks +" and " + fishingMaxTicks + " ticks");
     }
+
+    public boolean nerfedMobsShouldJump;
+    private void nerfedMobsShouldJump() {
+        nerfedMobsShouldJump = getBoolean("spawner-nerfed-mobs-should-jump", false);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/ControllerJump.java b/src/main/java/net/minecraft/server/ControllerJump.java
index 2e869004c..8a6856e0f 100644
--- a/src/main/java/net/minecraft/server/ControllerJump.java
+++ b/src/main/java/net/minecraft/server/ControllerJump.java
@@ -13,6 +13,7 @@ public class ControllerJump {
         this.a = true;
     }
 
+    public void jumpIfSet() { this.b(); } // Paper - OBFHELPER
     public void b() {
         this.b.setJumping(this.a);
         this.a = false;
diff --git a/src/main/java/net/minecraft/server/EntityInsentient.java b/src/main/java/net/minecraft/server/EntityInsentient.java
index 113532a97..946e89c49 100644
--- a/src/main/java/net/minecraft/server/EntityInsentient.java
+++ b/src/main/java/net/minecraft/server/EntityInsentient.java
@@ -31,6 +31,7 @@ public abstract class EntityInsentient extends EntityLiving {
     private final EntityAIBodyControl c;
     protected NavigationAbstract navigation;
     public PathfinderGoalSelector goalSelector;
+    @Nullable public PathfinderGoalFloat goalFloat; // Paper
     public PathfinderGoalSelector targetSelector;
     private EntityLiving goalTarget;
     private final EntitySenses bz;
@@ -636,6 +637,12 @@ public abstract class EntityInsentient extends EntityLiving {
         // Spigot Start
         if ( this.fromMobSpawner )
         {
+            // Paper start - Allow nerfed mobs to jump and float
+            if (goalFloat != null) {
+                if (goalFloat.validConditions()) goalFloat.update();
+                this.getControllerJump().jumpIfSet();
+            }
+            // Paper end
             return;
         }
         // Spigot End
diff --git a/src/main/java/net/minecraft/server/PathfinderGoalFloat.java b/src/main/java/net/minecraft/server/PathfinderGoalFloat.java
index 040a64471..a10532b0f 100644
--- a/src/main/java/net/minecraft/server/PathfinderGoalFloat.java
+++ b/src/main/java/net/minecraft/server/PathfinderGoalFloat.java
@@ -8,10 +8,12 @@ public class PathfinderGoalFloat extends PathfinderGoal {
 
     public PathfinderGoalFloat(EntityInsentient entityinsentient) {
         this.a = entityinsentient;
+        if (entityinsentient.getWorld().paperConfig.nerfedMobsShouldJump) entityinsentient.goalFloat = this; // Paper
         this.a(EnumSet.of(PathfinderGoal.Type.JUMP));
         entityinsentient.getNavigation().d(true);
     }
 
+    public final boolean validConditions() { return this.a(); } // Paper - OBFHELPER
     @Override
     public boolean a() {
         double d0 = (double) this.a.getHeadHeight() < 0.4D ? 0.2D : 0.4D;
@@ -19,6 +21,7 @@ public class PathfinderGoalFloat extends PathfinderGoal {
         return this.a.isInWater() && this.a.ce() > d0 || this.a.aC();
     }
 
+    public void update() { this.e(); } // Paper - OBFHELPER
     @Override
     public void e() {
         if (this.a.getRandom().nextFloat() < 0.8F) {
-- 
2.21.0