From fc571750563b70b070b6f8e00a8b641c5f9c476a Mon Sep 17 00:00:00 2001
From: Anuken <arnukren@gmail.com>
Date: Mon, 22 Jan 2018 14:43:34 -0500
Subject: [PATCH] Fixed negative item bug

---
 core/src/io/anuke/mindustry/core/Control.java   | 1 +
 core/src/io/anuke/mindustry/core/NetServer.java | 6 +-----
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/core/src/io/anuke/mindustry/core/Control.java b/core/src/io/anuke/mindustry/core/Control.java
index 20fa81eba7..e6e4979f77 100644
--- a/core/src/io/anuke/mindustry/core/Control.java
+++ b/core/src/io/anuke/mindustry/core/Control.java
@@ -514,6 +514,7 @@ public class Control extends Module{
 	
 	public void removeItem(ItemStack req){
 		items[req.item.id] -= req.amount;
+		if(items[req.item.id] < 0) items[req.item.id] = 0; //prevents negative item glitches in multiplayer
 		shouldUpdateItems = true;
 	}
 	
diff --git a/core/src/io/anuke/mindustry/core/NetServer.java b/core/src/io/anuke/mindustry/core/NetServer.java
index 80d088db1a..ba038a08a0 100644
--- a/core/src/io/anuke/mindustry/core/NetServer.java
+++ b/core/src/io/anuke/mindustry/core/NetServer.java
@@ -123,11 +123,7 @@ public class NetServer extends Module{
             packet.playerid = connections.get(id).id;
 
             Recipe recipe = Recipes.getByResult(Block.getByID(packet.block));
-            if (recipe != null) {
-                for (ItemStack stack : recipe.requirements) {
-                    Vars.control.removeItem(stack);
-                }
-            }
+            if (recipe != null) Vars.control.removeItems(recipe.requirements);
 
             Net.sendExcept(id, packet, SendMode.tcp);
         });