From f60c8e18d6a4de3898ffc44afc4a126b21351774 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Sat, 23 Mar 2013 09:46:33 +1100
Subject: [PATCH] Merge tweaks and configuration

This allows the merging of Experience orbs, as well as the configuration of the merge radius of items. Additionally it refactors the merge algorithm to be a better experience for players.

diff --git a/src/main/java/net/minecraft/server/EntityItem.java b/src/main/java/net/minecraft/server/EntityItem.java
index b3595c8a..5dfdd8ab 100644
--- a/src/main/java/net/minecraft/server/EntityItem.java
+++ b/src/main/java/net/minecraft/server/EntityItem.java
@@ -142,7 +142,10 @@ public class EntityItem extends Entity {
     }
 
     private void mergeNearby() {
-        List<EntityItem> list = this.world.a(EntityItem.class, this.getBoundingBox().grow(0.5D, 0.0D, 0.5D), (entityitem) -> {
+        // Spigot start
+        double radius = world.spigotConfig.itemMerge;
+        List<EntityItem> list = this.world.a(EntityItem.class, this.getBoundingBox().grow(radius, radius, radius), (entityitem) -> {
+            // Spigot end
             return entityitem != this && entityitem.z();
         });
 
@@ -176,7 +179,7 @@ public class EntityItem extends Entity {
             if (itemstack1.getCount() + itemstack.getCount() <= itemstack1.getMaxStackSize()) {
                 if (!(itemstack1.hasTag() ^ itemstack.hasTag())) {
                     if (!itemstack1.hasTag() || itemstack1.getTag().equals(itemstack.getTag())) {
-                        if (itemstack1.getCount() < itemstack.getCount()) {
+                        if (true || itemstack1.getCount() < itemstack.getCount()) { // Spigot
                             a(this, itemstack, entityitem, itemstack1);
                         } else {
                             a(entityitem, itemstack1, this, itemstack);
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index d191b065..db6d8f23 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -386,6 +386,23 @@ public class CraftEventFactory {
             event = CraftEventFactory.callProjectileLaunchEvent(entity);
         } else if (entity.getBukkitEntity() instanceof org.bukkit.entity.Vehicle){
             event = CraftEventFactory.callVehicleCreateEvent(entity);
+        // Spigot start
+        } else if (entity instanceof EntityExperienceOrb) {
+            EntityExperienceOrb xp = (EntityExperienceOrb) entity;
+            double radius = world.spigotConfig.expMerge;
+            if (radius > 0) {
+                List<Entity> entities = world.getEntities(entity, entity.getBoundingBox().grow(radius, radius, radius));
+                for (Entity e : entities) {
+                    if (e instanceof EntityExperienceOrb) {
+                        EntityExperienceOrb loopItem = (EntityExperienceOrb) e;
+                        if (!loopItem.dead) {
+                            xp.value += loopItem.value;
+                            loopItem.die();
+                        }
+                    }
+                }
+            }
+        // Spigot end
         } else if (!(entity instanceof EntityPlayer)) {
             event = CraftEventFactory.callEntitySpawnEvent(entity);
         }
diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java
index 8763048a..23ce7243 100644
--- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
+++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
@@ -111,4 +111,18 @@ public class SpigotWorldConfig
         vineModifier = getAndValidateGrowth( "Vine" );
         cocoaModifier = getAndValidateGrowth( "Cocoa" );
     }
+
+    public double itemMerge;
+    private void itemMerge()
+    {
+        itemMerge = getDouble("merge-radius.item", 2.5 );
+        log( "Item Merge Radius: " + itemMerge );
+    }
+
+    public double expMerge;
+    private void expMerge()
+    {
+        expMerge = getDouble("merge-radius.exp", 3.0 );
+        log( "Experience Merge Radius: " + expMerge );
+    }
 }
-- 
2.20.1