From 72c9924c43d2d39544698b14e6332ce719556754 Mon Sep 17 00:00:00 2001
From: Byteflux <byte@byteflux.net>
Date: Tue, 1 Mar 2016 14:14:15 -0600
Subject: [PATCH] Drop falling block and tnt entities at the specified height


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 3f734327c0..1ed58f4bba 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -114,4 +114,14 @@ public class PaperWorldConfig {
         keepSpawnInMemory = getBoolean("keep-spawn-loaded", true);
         log("Keep spawn chunk loaded: " + keepSpawnInMemory);
     }
+
+    public int fallingBlockHeightNerf;
+    public int entityTNTHeightNerf;
+    private void heightNerfs() {
+        fallingBlockHeightNerf = getInt("falling-block-height-nerf", 0);
+        entityTNTHeightNerf = getInt("tnt-entity-height-nerf", 0);
+
+        if (fallingBlockHeightNerf != 0) log("Falling Block Height Limit set to Y: " + fallingBlockHeightNerf);
+        if (entityTNTHeightNerf != 0) log("TNT Entity Height Limit set to Y: " + entityTNTHeightNerf);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index c348d6bec3..f5647a171d 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1788,6 +1788,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
         return this.a(itemstack, 0.0F);
     }
 
+    @Nullable public final EntityItem dropItem(ItemStack itemstack, float offset) { return this.a(itemstack, offset); } // Paper - OBFHELPER
     @Nullable
     public EntityItem a(ItemStack itemstack, float f) {
         if (itemstack.isEmpty()) {
diff --git a/src/main/java/net/minecraft/server/EntityFallingBlock.java b/src/main/java/net/minecraft/server/EntityFallingBlock.java
index c9c903367f..fee5e67877 100644
--- a/src/main/java/net/minecraft/server/EntityFallingBlock.java
+++ b/src/main/java/net/minecraft/server/EntityFallingBlock.java
@@ -88,6 +88,16 @@ public class EntityFallingBlock extends Entity {
             }
 
             this.move(EnumMoveType.SELF, this.getMot());
+
+            // Paper start - Configurable EntityFallingBlock height nerf
+            if (this.world.paperConfig.fallingBlockHeightNerf != 0 && this.locY > this.world.paperConfig.fallingBlockHeightNerf) {
+                if (this.dropItem && this.world.getGameRules().getBoolean("doEntityDrops")) {
+                    this.a(block);
+                }
+
+                this.die();
+            }
+            // Paper end
             if (!this.world.isClientSide) {
                 blockposition = new BlockPosition(this);
                 boolean flag = this.block.getBlock() instanceof BlockConcretePowder;
diff --git a/src/main/java/net/minecraft/server/EntityTNTPrimed.java b/src/main/java/net/minecraft/server/EntityTNTPrimed.java
index ba86a07344..e3001570f9 100644
--- a/src/main/java/net/minecraft/server/EntityTNTPrimed.java
+++ b/src/main/java/net/minecraft/server/EntityTNTPrimed.java
@@ -57,6 +57,11 @@ public class EntityTNTPrimed extends Entity {
         }
 
         this.move(EnumMoveType.SELF, this.getMot());
+        // Paper start - Configurable TNT entity height nerf
+        if (this.world.paperConfig.entityTNTHeightNerf != 0 && this.locY > this.world.paperConfig.entityTNTHeightNerf) {
+            this.die();
+        }
+        // Paper end
         this.setMot(this.getMot().a(0.98D));
         if (this.onGround) {
             this.setMot(this.getMot().d(0.7D, -0.5D, 0.7D));
-- 
2.22.0