From c3ea72d0ce6cbf68d57705e3b527a724c52a8f05 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 1 Mar 2016 23:58:50 -0600
Subject: [PATCH] Configurable top of nether void damage


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 1ed58f4bba..a797a57671 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -124,4 +124,19 @@ public class PaperWorldConfig {
         if (fallingBlockHeightNerf != 0) log("Falling Block Height Limit set to Y: " + fallingBlockHeightNerf);
         if (entityTNTHeightNerf != 0) log("TNT Entity Height Limit set to Y: " + entityTNTHeightNerf);
     }
+
+    public int netherVoidTopDamageHeight;
+    public boolean doNetherTopVoidDamage() { return netherVoidTopDamageHeight > 0; }
+    private void netherVoidTopDamageHeight() {
+        netherVoidTopDamageHeight = getInt("nether-ceiling-void-damage-height", 0);
+        log("Top of the nether void damage height: " + netherVoidTopDamageHeight);
+
+        if (PaperConfig.version < 18) {
+            boolean legacy = getBoolean("nether-ceiling-void-damage", false);
+            if (legacy) {
+                netherVoidTopDamageHeight = 128;
+                set("nether-ceiling-void-damage-height", netherVoidTopDamageHeight);
+            }
+        }
+    }
 }
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 205376f6af..8165655c31 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -397,9 +397,15 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
             this.fallDistance *= 0.5F;
         }
 
+        // Paper start - Configurable nether ceiling damage
+        // Extracted to own function
+        /*
         if (this.locY < -64.0D) {
             this.ae();
         }
+        */
+        this.performVoidDamage();
+        // Paper end
 
         if (!this.world.isClientSide) {
             this.setFlag(0, this.fireTicks > 0);
@@ -409,6 +415,17 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
         this.world.getMethodProfiler().exit();
     }
 
+    // Paper start
+    protected void performVoidDamage() {
+        if (this.locY < -64.0D || (this.world.getWorld().getEnvironment() == org.bukkit.World.Environment.NETHER
+            && world.paperConfig.doNetherTopVoidDamage()
+            && this.locY >= world.paperConfig.netherVoidTopDamageHeight)) {
+
+            this.doVoidDamage();
+        }
+    }
+    // Paper end
+
     protected void E() {
         if (this.portalCooldown > 0) {
             --this.portalCooldown;
@@ -476,6 +493,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
         this.fireTicks = 0;
     }
 
+   protected final void doVoidDamage() { this.ae(); } // Paper - OBFHELPER
     protected void ae() {
         this.die();
     }
diff --git a/src/main/java/net/minecraft/server/EntityMinecartAbstract.java b/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
index 9dcf8d7142..2a2105cbce 100644
--- a/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
+++ b/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
@@ -182,9 +182,15 @@ public abstract class EntityMinecartAbstract extends Entity {
             this.setDamage(this.getDamage() - 1.0F);
         }
 
+        // Paper start - Configurable nether ceiling damage
+        // Extracted to own function
+        /*
         if (this.locY < -64.0D) {
             this.ae();
         }
+        */
+        this.performVoidDamage();
+        // Paper end
 
         // this.doPortalTick(); // CraftBukkit - handled in postTick
         if (this.world.isClientSide) {
-- 
2.21.0