From c2b98da52b36fcfa251ddc1951645eadf6b25bbd 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 f9a58f9..df3e6fb 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -133,4 +133,14 @@ 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/EntityFallingBlock.java b/src/main/java/net/minecraft/server/EntityFallingBlock.java
index 0b2c5d7..08a7969 100644
--- a/src/main/java/net/minecraft/server/EntityFallingBlock.java
+++ b/src/main/java/net/minecraft/server/EntityFallingBlock.java
@@ -77,6 +77,17 @@ public class EntityFallingBlock extends Entity {
 
             this.motY -= 0.03999999910593033D;
             this.move(this.motX, this.motY, this.motZ);
+
+            // Paper start - Configurable EntityFallingBlock height nerf
+            if (this.world.paperConfig.fallingBlockHeightNerf != 0 && this.locY > this.world.paperConfig.fallingBlockHeightNerf) {
+                if (this.dropItem) {
+                    this.a(new ItemStack(block, 1, block.getDropData(this.block)), 0.0F);
+                }
+
+                this.die();
+            }
+            // Paper end
+
             this.motX *= 0.9800000190734863D;
             this.motY *= 0.9800000190734863D;
             this.motZ *= 0.9800000190734863D;
diff --git a/src/main/java/net/minecraft/server/EntityTNTPrimed.java b/src/main/java/net/minecraft/server/EntityTNTPrimed.java
index 35ed2a6..564ea37 100644
--- a/src/main/java/net/minecraft/server/EntityTNTPrimed.java
+++ b/src/main/java/net/minecraft/server/EntityTNTPrimed.java
@@ -51,6 +51,13 @@ public class EntityTNTPrimed extends Entity {
         this.lastZ = this.locZ;
         this.motY -= 0.03999999910593033D;
         this.move(this.motX, this.motY, this.motZ);
+
+        // Paper start - Configurable TNT entity height nerf
+        if (this.world.paperConfig.entityTNTHeightNerf != 0 && this.locY > this.world.paperConfig.entityTNTHeightNerf) {
+            this.die();
+        }
+        // Paper end
+
         this.motX *= 0.9800000190734863D;
         this.motY *= 0.9800000190734863D;
         this.motZ *= 0.9800000190734863D;
-- 
2.8.2