From e5030bb8e88d57428375af160227ad56bde7b2f3 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 e7481dd..9f1a7b7 100644
--- a/src/main/java/net/minecraft/server/EntityItem.java
+++ b/src/main/java/net/minecraft/server/EntityItem.java
@@ -116,7 +116,10 @@ public class EntityItem extends Entity {
     }
 
     private void g() {
-        Iterator iterator = this.world.a(EntityItem.class, this.boundingBox.grow(0.5D, 0.0D, 0.5D)).iterator();
+        // Spigot start
+        double radius = world.getWorld().itemMergeRadius;
+        Iterator iterator = this.world.a(EntityItem.class, this.boundingBox.grow(radius, radius, radius)).iterator();
+        // Spigot end
 
         while (iterator.hasNext()) {
             EntityItem entityitem = (EntityItem) iterator.next();
@@ -145,11 +148,13 @@ public class EntityItem extends Entity {
             } else if (itemstack1.count + itemstack.count > itemstack1.getMaxStackSize()) {
                 return false;
             } else {
-                itemstack1.count += itemstack.count;
-                entityitem.pickupDelay = Math.max(entityitem.pickupDelay, this.pickupDelay);
-                entityitem.age = Math.min(entityitem.age, this.age);
-                entityitem.setItemStack(itemstack1);
-                this.die();
+                // Spigot start
+                itemstack.count += itemstack1.count;
+                this.pickupDelay = Math.max(entityitem.pickupDelay, this.pickupDelay);
+                this.age = Math.min(entityitem.age, this.age);
+                this.setItemStack(itemstack);
+                entityitem.die();
+                // Spigot end
                 return true;
             }
         } else {
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index a77f48d..f5730d3 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -949,6 +949,23 @@ public abstract class World implements IBlockAccess {
             // Not all projectiles extend EntityProjectile, so check for Bukkit interface instead
             event = CraftEventFactory.callProjectileLaunchEvent(entity);
         }
+        // Spigot start
+        else if (entity instanceof EntityExperienceOrb) {
+            EntityExperienceOrb xp = (EntityExperienceOrb) entity;
+            double radius = this.getWorld().expMergeRadius;
+            if (radius > 0) {
+                List<Entity> entities = this.getEntities(entity, entity.boundingBox.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
 
         if (event != null && (event.isCancelled() || entity.dead)) {
             entity.dead = true;
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 9da842e..a303090 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -92,6 +92,8 @@ public class CraftWorld implements World {
         randomLightingUpdates = configuration.getBoolean("world-settings.default.random-light-updates", randomLightingUpdates);
         mobSpawnRange = configuration.getInt("world-settings.default.mob-spawn-range", mobSpawnRange);
         aggregateTicks = Math.max(1, configuration.getInt("world-settings.default.aggregate-chunkticks", aggregateTicks));
+        itemMergeRadius = configuration.getDouble("world-settings.default.item-merge-radius", itemMergeRadius);
+        expMergeRadius = configuration.getDouble("world-settings.default.exp-merge-radius", expMergeRadius);
 
         wheatGrowthModifier = configuration.getInt("world-settings.default.wheat-growth-modifier", wheatGrowthModifier);
         cactusGrowthModifier = configuration.getInt("world-settings.default.cactus-growth-modifier", cactusGrowthModifier);
@@ -107,6 +109,8 @@ public class CraftWorld implements World {
         randomLightingUpdates = configuration.getBoolean("world-settings." + name + ".random-light-updates", randomLightingUpdates);
         mobSpawnRange = configuration.getInt("world-settings." + name + ".mob-spawn-range", mobSpawnRange);
         aggregateTicks = Math.max(1, configuration.getInt("world-settings." + name + ".aggregate-chunkticks", aggregateTicks));
+        itemMergeRadius = configuration.getDouble("world-settings." + name + ".item-merge-radius", itemMergeRadius);
+        expMergeRadius = configuration.getDouble("world-settings." + name + ".exp-merge-radius", expMergeRadius);
 
         wheatGrowthModifier = configuration.getInt("world-settings." + name + ".wheat-growth-modifier", wheatGrowthModifier);
         cactusGrowthModifier = configuration.getInt("world-settings." + name + ".cactus-growth-modifier", cactusGrowthModifier);
@@ -138,6 +142,8 @@ public class CraftWorld implements World {
     public boolean randomLightingUpdates = false;
     public int mobSpawnRange = 4;
     public int aggregateTicks = 4;
+    public double itemMergeRadius = 3.5;
+    public double expMergeRadius = 3.5;
     //Crop growth rates:
     public int wheatGrowthModifier = 100;
     public int cactusGrowthModifier = 100;
diff --git a/src/main/resources/configurations/bukkit.yml b/src/main/resources/configurations/bukkit.yml
index b7c0376..92241d9 100644
--- a/src/main/resources/configurations/bukkit.yml
+++ b/src/main/resources/configurations/bukkit.yml
@@ -37,6 +37,8 @@ world-settings:
         mob-spawn-range: 4
         random-light-updates: false
         aggregate-chunkticks: 4
+        item-merge-radius: 3.5
+        exp-merge-radius: 3.5
         wheat-growth-modifier: 100
         cactus-growth-modifier: 100
         melon-growth-modifier: 100
-- 
1.8.2.1