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/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 584e83441a9fef88eb1b0a29bec8bda29d6a0c9c..706417f44c1eebc7cc5e8e7053fa0ab21f4caeba 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1849,6 +1849,7 @@ public abstract class Entity implements Nameable, CommandSource, net.minecraft.s
         return this.spawnAtLocation(stack, 0.0F);
     }
 
+    @Nullable public final ItemEntity dropItem(ItemStack itemstack, float offset) { return this.spawnAtLocation(itemstack, offset); } // Paper - OBFHELPER
     @Nullable
     public ItemEntity spawnAtLocation(ItemStack stack, float yOffset) {
         if (stack.isEmpty()) {
diff --git a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
index 8a9e2316b9f5756503dc06e27981525d2cd7d1a5..5394bc6336cb84025c1c748fb5b3d38e0648a590 100644
--- a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
+++ b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
@@ -122,6 +122,17 @@ public class FallingBlockEntity extends Entity {
             }
 
             this.move(MoverType.SELF, this.getDeltaMovement());
+
+            // Paper start - Configurable EntityFallingBlock height nerf
+            if (this.level.paperConfig.fallingBlockHeightNerf != 0 && this.getY() > this.level.paperConfig.fallingBlockHeightNerf) {
+                if (this.dropItem && this.level.getGameRules().getBoolean(GameRules.RULE_DOENTITYDROPS)) {
+                    this.spawnAtLocation(block);
+                }
+
+                this.remove();
+                return;
+            }
+            // Paper end
             if (!this.level.isClientSide) {
                 blockposition = this.blockPosition();
                 boolean flag = this.blockState.getBlock() instanceof ConcretePowderBlock;
diff --git a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
index ff15a372b7cad5fa88b7ef6de1f3441d93f9c67e..4c4262b8f0cb44b8cea8cb46194a6e70d4ce56f4 100644
--- a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
+++ b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
@@ -69,6 +69,12 @@ public class PrimedTnt extends Entity {
         }
 
         this.move(MoverType.SELF, this.getDeltaMovement());
+        // Paper start - Configurable TNT entity height nerf
+        if (this.level.paperConfig.entityTNTHeightNerf != 0 && this.getY() > this.level.paperConfig.entityTNTHeightNerf) {
+            this.remove();
+            return;
+        }
+        // Paper end
         this.setDeltaMovement(this.getDeltaMovement().scale(0.98D));
         if (this.onGround) {
             this.setDeltaMovement(this.getDeltaMovement().multiply(0.7D, -0.5D, 0.7D));
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/MinecartTNT.java b/src/main/java/net/minecraft/world/entity/vehicle/MinecartTNT.java
index c2ed3ba42d29a50386c94b109fdd3b2f2f1b433b..3b5e96f2325e14a94de0fb2d6da86812cecc7395 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/MinecartTNT.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/MinecartTNT.java
@@ -47,6 +47,12 @@ public class MinecartTNT extends AbstractMinecart {
     public void tick() {
         super.tick();
         if (this.fuse > 0) {
+            // Paper start - Configurable TNT entity height nerf
+            if (this.level.paperConfig.entityTNTHeightNerf != 0 && this.getY() > this.level.paperConfig.entityTNTHeightNerf) {
+                this.remove();
+                return;
+            }
+            // Paper end
             --this.fuse;
             this.level.addParticle(ParticleTypes.SMOKE, this.getX(), this.getY() + 0.5D, this.getZ(), 0.0D, 0.0D, 0.0D);
         } else if (this.fuse == 0) {