Use enum for direction

1 files changed, 12 insertions, 2 deletions

diff --git a/world.rhm b/world.rhm
index 3a5515a..6adfd02 100644
--- a/world.rhm
+++ b/world.rhm
@@ -5,16 +5,26 @@ export:
     Entity
     World
 
+enum Direction:
+    north
+    north_east
+    east
+    south_east
+    south
+    south_west
+    west
+    north_west
+
 class Chunk(width :: Int,
             height :: Int,
             offset_x :: Int,
             offset_y :: Int,
             tiles :: Array.now_of(Int),
-            neighbours :: MutableMap.now_of(Symbol, Chunk)):
+            neighbours :: MutableMap.now_of(Direction, Chunk)):
     constructor(width :: Int, height :: Int, offset_x :: Int, offset_y :: Int):
         super(width, height, offset_x, offset_y, Array.make(width * height, 0), MutableMap())
 
-    method add_neighbour(chunk :: Chunk, direction :: Symbol):
+    method add_neighbour(chunk :: Chunk, direction :: Direction):
         neighbours[direction] := chunk
 
     method get_tile(x :: Int, y :: Int):