Paper/CraftBukkit-Patches/0046-Fix-Health-Scaling.patch

From 6f39ac92dbda094dd5401cb1550f1f173ca4d765 Mon Sep 17 00:00:00 2001
From: Nick Minkler <sleaker@gmail.com>
Date: Sun, 2 Jun 2013 14:54:11 +1000
Subject: [PATCH] Fix Health Scaling

Fix scaled health sending incorrect values to client. No longer attempts to scale health above maximum. Hopefully fixes 'flash' when player eats food.

diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index 58a4acb..57d39fe 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -416,7 +416,10 @@ public abstract class EntityLiving extends Entity {
 
     public int getScaledHealth() {
         if (this.maxHealth != this.getMaxHealth() && this.getHealth() > 0) {
-            return this.getHealth() * this.getMaxHealth() / this.maxHealth + 1;
+            // Spigot start
+            int health = (int) ((((double) this.getHealth()) / this.maxHealth) * this.getMaxHealth());
+            return health > 0 ? health : 1;
+            // Spigot end
         } else {
             return this.getHealth();
         }
diff --git a/src/main/java/net/minecraft/server/FoodMetaData.java b/src/main/java/net/minecraft/server/FoodMetaData.java
index f26d552..8fcdbae 100644
--- a/src/main/java/net/minecraft/server/FoodMetaData.java
+++ b/src/main/java/net/minecraft/server/FoodMetaData.java
@@ -39,7 +39,8 @@ public class FoodMetaData {
                     this.foodLevel = event.getFoodLevel();
                 }
 
-                ((EntityPlayer) entityhuman).playerConnection.sendPacket(new Packet8UpdateHealth(entityhuman.getHealth(), this.foodLevel, this.saturationLevel));
+                // Spigot - This next line fixes health scaling
+                ((EntityPlayer) entityhuman).playerConnection.sendPacket(new Packet8UpdateHealth(((EntityPlayer) entityhuman).getScaledHealth(), this.foodLevel, this.saturationLevel));
                 // CraftBukkit end
             }
         }
diff --git a/src/main/java/net/minecraft/server/ItemFood.java b/src/main/java/net/minecraft/server/ItemFood.java
index 409addf..c8a7f41 100644
--- a/src/main/java/net/minecraft/server/ItemFood.java
+++ b/src/main/java/net/minecraft/server/ItemFood.java
@@ -36,7 +36,8 @@ public class ItemFood extends Item {
             entityhuman.getFoodData().eat(event.getFoodLevel() - oldFoodLevel, this.getSaturationModifier());
         }
 
-        ((EntityPlayer) entityhuman).playerConnection.sendPacket(new Packet8UpdateHealth(entityhuman.getHealth(), entityhuman.getFoodData().foodLevel, entityhuman.getFoodData().saturationLevel));
+        // Spigot - this next line fixes health scaling
+        ((EntityPlayer) entityhuman).playerConnection.sendPacket(new Packet8UpdateHealth(((EntityPlayer) entityhuman).getScaledHealth(), entityhuman.getFoodData().foodLevel, entityhuman.getFoodData().saturationLevel));
         // CraftBukkit end
 
         world.makeSound(entityhuman, "random.burp", 0.5F, world.random.nextFloat() * 0.1F + 0.9F);
-- 
1.8.1.2