Moved the map systems into their own directory

common/mapsystem/tile.cpp

@@ -0,0 +1,44 @@
+/* Copyright: (c) Kayne Ruse 2013
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "tile.hpp"
+
+bool operator<(Tile const& lhs, Tile const& rhs) {
+	//sort by depth -> y -> x
+	if (lhs.depth == rhs.depth) {
+		if (lhs.y == rhs.y) {
+			return lhs.x < rhs.x;
+		}
+		return lhs.y < rhs.y;
+	}
+	return lhs.depth < rhs.depth;
+}
+
+inline bool operator>(Tile const& lhs, Tile const& rhs) {
+	//wrap the other operator
+	return rhs < lhs;
+}
+
+inline bool operator==(Tile const& lhs, Tile const& rhs) {
+	//comparisons work on the location ONLY
+	//this function is redundant as far as the std::set object is concerned
+	return (lhs.x == rhs.x) && (lhs.y == rhs.y) && (lhs.depth == rhs.depth);
+}