From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Sun, 5 May 2019 12:58:45 -0500
Subject: [PATCH] LivingEntity safeFallDistance

Original code by PurpurMC, licensed under MIT
You can find the original code on https://github.com/PurpurMC/Purpur

diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 7f8c9538c231a7aca163ecdb3966cd2dc23e2cad..1f41e0a3d2b4b5bd5f2db217ef24a5711ac8513d 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -251,6 +251,7 @@ public abstract class LivingEntity extends Entity {
     // CraftBukkit start
     public int expToDrop;
     public int maxAirTicks = 300;
+    public float safeFallDistance = 3.0F; // Purpur
     public boolean forceDrops;
     public ArrayList<org.bukkit.inventory.ItemStack> drops = new ArrayList<org.bukkit.inventory.ItemStack>();
     public final org.bukkit.craftbukkit.attribute.CraftAttributeMap craftAttributes;
@@ -346,8 +347,8 @@ public abstract class LivingEntity extends Entity {
             this.tryAddSoulSpeed();
         }
 
-        if (!this.level.isClientSide && this.fallDistance > 3.0F && onGround) {
-            float f = (float) Mth.ceil(this.fallDistance - 3.0F);
+        if (!this.level.isClientSide && this.fallDistance > this.safeFallDistance && onGround) { // Purpur
+            float f = (float) Mth.ceil(this.fallDistance - this.safeFallDistance); // Purpur
 
             if (!landedState.isAir()) {
                 double d1 = Math.min((double) (0.2F + f / 15.0F), 2.5D);
@@ -1921,7 +1922,7 @@ public abstract class LivingEntity extends Entity {
         MobEffectInstance mobeffect = this.getEffect(MobEffects.JUMP);
         float f2 = mobeffect == null ? 0.0F : (float) (mobeffect.getAmplifier() + 1);
 
-        return Mth.ceil((fallDistance - 3.0F - f2) * damageMultiplier);
+        return Mth.ceil((fallDistance - this.safeFallDistance - f2) * damageMultiplier); // Purpur
     }
 
     protected void playBlockFallSound() {
diff --git a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
index a726006888bbbdb290bcda3ac4fd45d68ba51b79..829753b2a811e97a16189d932f03f4f652b185c6 100644
--- a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
+++ b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
@@ -286,7 +286,7 @@ public abstract class AbstractHorse extends Animal implements ContainerListener,
 
     @Override
     protected int calculateFallDamage(float fallDistance, float damageMultiplier) {
-        return Mth.ceil((fallDistance * 0.5F - 3.0F) * damageMultiplier);
+        return Mth.ceil((fallDistance * 0.5F - this.safeFallDistance) * damageMultiplier);
     }
 
     protected int getInventorySize() {
diff --git a/src/main/java/net/minecraft/world/entity/monster/Giant.java b/src/main/java/net/minecraft/world/entity/monster/Giant.java
index 0d578ab12c874bd2daccc4322a3fe1abafa4bc18..a183226bb0cf01c5aaf7babe1d08fa9ab7388648 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Giant.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Giant.java
@@ -12,6 +12,7 @@ import net.minecraft.world.level.LevelReader;
 public class Giant extends Monster {
     public Giant(EntityType<? extends Giant> type, Level world) {
         super(type, world);
+        this.safeFallDistance = 10.0F; // Purpur
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index c022751e3b45469cc0ad6732e2d6ff08918bafa4..1dcfe129ec3633de67404ab5ab72cdcee31d3d9d 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -920,4 +920,16 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         throw new IllegalArgumentException(entityCategory + " is an unrecognized entity category");
     }
     // Paper end
+
+    // Purpur start
+    @Override
+    public float getSafeFallDistance() {
+        return getHandle().safeFallDistance;
+    }
+
+    @Override
+    public void setSafeFallDistance(float safeFallDistance) {
+        getHandle().safeFallDistance = safeFallDistance;
+    }
+    // Purpur end
 }