From d6be783ccfe38ba06985b16ccfa314adfbde7da3 Mon Sep 17 00:00:00 2001
From: Chris Forbes <chrisf@ijw.co.nz>
Date: Mon, 21 Dec 2009 19:42:48 +1300
Subject: [PATCH] a unit can only be in one control group at a time

---
 OpenRa.Game/Controller.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/OpenRa.Game/Controller.cs b/OpenRa.Game/Controller.cs
index 57631a1394..948273f468 100644
--- a/OpenRa.Game/Controller.cs
+++ b/OpenRa.Game/Controller.cs
@@ -166,6 +166,10 @@ namespace OpenRa.Game
 					return;
 
 				controlGroups[group].Clear();
+
+				for (var i = 0; i < 10; i++)	/* all control groups */
+					controlGroups[i].RemoveAll(a => uog.selection.Contains(a));
+
 				controlGroups[group].AddRange(uog.selection);
 				return;
 			}