1 files changed, 11 insertions, 5 deletions

diff --git a/include/isogfx/gfx2d.h b/include/isogfx/gfx2d.h
index 59566f3..a3ddbb6 100644
--- a/include/isogfx/gfx2d.h
+++ b/include/isogfx/gfx2d.h
@@ -37,12 +37,18 @@ typedef struct TileDesc {
   };
 } TileDesc;
 
+typedef enum MapOrientation {
+  MapOrthogonal,
+  MapIsometric,
+} MapOrientation;
+
 typedef struct MapDesc {
-  int tile_width;   // Base tile width in pixels.
-  int tile_height;  // Base tile height in pixels.
-  int world_width;  // World width in tiles.
-  int world_height; // World height in tiles.
-  int num_tiles;    // Number of tiles to allocate memory for.
+  int            tile_width;   // Base tile width in pixels.
+  int            tile_height;  // Base tile height in pixels.
+  int            world_width;  // World width in tiles.
+  int            world_height; // World height in tiles.
+  int            num_tiles;    // Number of tiles to allocate memory for.
+  MapOrientation orientation;  // Map orientation.
 } MapDesc;
 
 typedef struct IsoGfxDesc {