--- a/share/hedgewars/Data/Missions/Campaign/A_Space_Adventure/global_functions.lua	Thu Dec 12 02:52:37 2013 +0200
+++ b/share/hedgewars/Data/Missions/Campaign/A_Space_Adventure/global_functions.lua	Fri Dec 13 13:50:14 2013 +0200
@@ -118,3 +118,9 @@
 	end
 	return res
 end
+
+-- returns the distance of 2 gears
+function distance(gear1, gear2)
+	local dist = math.sqrt(math.pow((GetX(gear1) - GetX(gear2)),2) + math.pow((GetY(gear1) - GetY(gear2)),2))
+	return dist
+end