From 0000000000000000000000000000000000000000 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

* Dec 2, 2020 Added tnt nerf for tnt minecarts - Machine_Maker

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 89e76dd73811fd0f6f8c8e7e5af804d5a4bb5a75..d16ae924bcbe31c964f7fb448757c748e5c4418c 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -124,4 +124,14 @@ 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 b6ca0c88fbfec5cc0a3d06a33f1ab7cddd52cbe3..0f47b10c9c3357f7a462680e2f26d7808a5f8afc 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1765,6 +1765,7 @@ 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 55e6d9a94c648bac68b80a76eda041fb952db09f..6b226c04d40adff8b0f1d28c0cc79439df002b3d 100644
--- a/src/main/java/net/minecraft/server/EntityFallingBlock.java
+++ b/src/main/java/net/minecraft/server/EntityFallingBlock.java
@@ -85,6 +85,17 @@ 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(GameRules.DO_ENTITY_DROPS)) {
+                    this.a(block);
+                }
+
+                this.die();
+                return;
+            }
+            // Paper end
             if (!this.world.isClientSide) {
                 blockposition = this.getChunkCoordinates();
                 boolean flag = this.block.getBlock() instanceof BlockConcretePowder;
diff --git a/src/main/java/net/minecraft/server/EntityMinecartTNT.java b/src/main/java/net/minecraft/server/EntityMinecartTNT.java
index 50d7c2899deb707dbbe333242e049b963d9b549c..3dfe3d13ac713c963256a662b52f54716e397672 100644
--- a/src/main/java/net/minecraft/server/EntityMinecartTNT.java
+++ b/src/main/java/net/minecraft/server/EntityMinecartTNT.java
@@ -26,6 +26,12 @@ public class EntityMinecartTNT extends EntityMinecartAbstract {
     public void tick() {
         super.tick();
         if (this.b > 0) {
+            // Paper start - Configurable TNT entity height nerf
+            if (this.world.paperConfig.entityTNTHeightNerf != 0 && this.locY() > this.world.paperConfig.entityTNTHeightNerf) {
+                this.die();
+                return;
+            }
+            // Paper end
             --this.b;
             this.world.addParticle(Particles.SMOKE, this.locX(), this.locY() + 0.5D, this.locZ(), 0.0D, 0.0D, 0.0D);
         } else if (this.b == 0) {
diff --git a/src/main/java/net/minecraft/server/EntityTNTPrimed.java b/src/main/java/net/minecraft/server/EntityTNTPrimed.java
index b448467a92650e1bd3d5fac7de685550b7e891df..2b8ed9d14bd6dd9330712741859eb77ba0194153 100644
--- a/src/main/java/net/minecraft/server/EntityTNTPrimed.java
+++ b/src/main/java/net/minecraft/server/EntityTNTPrimed.java
@@ -54,6 +54,12 @@ 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();
+            return;
+        }
+        // Paper end
         this.setMot(this.getMot().a(0.98D));
         if (this.onGround) {
             this.setMot(this.getMot().d(0.7D, -0.5D, 0.7D));