1 files changed, 21 insertions, 2 deletions
diff --git a/src/model/Direction.hpp b/src/model/Direction.hpp
index db288f6..e817170 100644
--- a/src/model/Direction.hpp
+++ b/src/model/Direction.hpp
@@ -31,13 +31,32 @@ namespace RPGEdit {
 
 namespace Model {
 
-enum Direction {
+enum class Direction {
 	NORTH,
 	EAST,
 	SOUTH,
-	WEST,
+	WEST
 };
 
+static inline Direction operator-(Direction dir) {
+	switch (dir) {
+	case Direction::NORTH:
+		return Direction::SOUTH;
+
+	case Direction::EAST:
+		return Direction::WEST;
+
+	case Direction::SOUTH:
+		return Direction::NORTH;
+
+	case Direction::WEST:
+		return Direction::EAST;
+
+	default:
+		__builtin_unreachable();
+	}
+}
+
 }
 
 }