Finished Part 3. Turned off tunnels for now. Will probably rework it a little before continuing to Part 4. The way they're handled now is messy.

map_objects.py

@@ -10,4 +10,22 @@ class Tile:
         if block_sight is None:
             block_sight = blocked
 
-        self.block_sight = block_sight
+        self.block_sight = block_sight
+
+
+class Rect:
+    def __init__(self, x, y, w, h):
+        self.x1 = x
+        self.y1 = y
+        self.x2 = x + w
+        self.y2 = y + h
+
+    def center(self):
+        center_x = int((self.x1 + self.x2) /2 )
+        center_y = int((self.y1 + self.y2) /2 )
+        return (center_x, center_y)
+
+    def intersect(self, other):
+        # returns true if this room overlaps another
+        return (self.x1 <= other.x2 and self.x2 >= other.x1 and
+                self.y1 <= other.y2 and self.y2 >= other.y1)