Purpur/patches/server/0015-LivingEntity-safeFallDistance.patch

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


diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 734ca15f79186cb0385b845c40ea56be7ab085cf..287189fc95067d746e8253fc2633b843a72dcd73 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -253,6 +253,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
     private boolean skipDropExperience;
     // CraftBukkit start
     public int expToDrop;
+    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;
@@ -353,7 +354,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
             this.tryAddSoulSpeed();
         }
 
-        if (!this.level().isClientSide && this.fallDistance > 3.0F && onGround && !state.isAir()) {
+        if (!this.level().isClientSide && this.fallDistance > this.safeFallDistance && onGround && !state.isAir()) { // Purpur
             double d1 = this.getX();
             double d2 = this.getY();
             double d3 = this.getZ();
@@ -368,7 +369,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
                 d3 = (double) landedPosition.getZ() + 0.5D + d5 / d6 * 0.5D;
             }
 
-            float f = (float) Mth.ceil(this.fallDistance - 3.0F);
+            float f = (float) Mth.ceil(this.fallDistance - this.safeFallDistance); // Purpur
             double d7 = Math.min((double) (0.2F + f / 15.0F), 2.5D);
             int i = (int) (150.0D * d7);
 
@@ -2058,7 +2059,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
             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
         }
     }
 
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 7a7466092a2cd194abec3abdb77a7c649b4b433c..fdf41f4990923aa4309febb9c0ca8009de8e16f1 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
@@ -384,7 +384,7 @@ 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 3f7d21a5be726d301e1bcaa11f1788b51c23a7cd..db95323da1aef267aa4fbe56aaff63cb8684e15b 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
     }
 
     // Purpur start
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index 7bc8b62ff6aa355f3f025fc6c3a3d4c6b355853b..f7ae6d11c6043a2037dbfd160b409579bd9a35fd 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -1094,4 +1094,16 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         getHandle().knockback(strength, directionX, directionZ);
     };
     // Paper end
+
+    // Purpur start
+    @Override
+    public float getSafeFallDistance() {
+        return getHandle().safeFallDistance;
+    }
+
+    @Override
+    public void setSafeFallDistance(float safeFallDistance) {
+        getHandle().safeFallDistance = safeFallDistance;
+    }
+    // Purpur end
 }