add XY struct for 2d points and offsets

1 files changed, 2 insertions, 1 deletions

diff --git a/Tile.h b/Tile.h
index ccf8d3b..7e44b09 100644
--- a/Tile.h
+++ b/Tile.h
@@ -5,6 +5,7 @@
 #include "TileData.h"
 #include "Color.h"
 #include "TileBehavior.h"
+#include "XY.h"
 
 class Museum;
 
@@ -21,7 +22,7 @@ public:
 	void set_data(TileData & data);
 	void set_type(const std::string & type);
 	void update();
-	Tile * get_neighbor(int dx, int dy);
+	Tile * get_neighbor(const XY & offset);
 
 private:
 	Museum & museum;