From ed3e525ba11d3383fdf0041e26286c72f342e91a Mon Sep 17 00:00:00 2001
From: Neil <neil@dip.sun.ac.za>
Date: Thu, 3 Mar 2016 13:32:35 +0200
Subject: [PATCH] Load tunnel tiles

---
 koperkapel/loaders/levelloader.py | 75 +++++++++++++++++++++++++------
 1 file changed, 61 insertions(+), 14 deletions(-)

diff --git a/koperkapel/loaders/levelloader.py b/koperkapel/loaders/levelloader.py
index 6820b15..8e47b5c 100644
--- a/koperkapel/loaders/levelloader.py
+++ b/koperkapel/loaders/levelloader.py
@@ -18,6 +18,21 @@ class Tile:
             raise NotImplementedError()
         return images.load(os.path.join(cls.TILESET, cls.IMG))
 
+class OrientatedTile:
+    IMG = None
+    TILESET = None
+    ANGLE = None
+
+    @classmethod
+    def image(cls, neighbors):
+        if cls.IMG is None or cls.TILESET is None:
+            raise NotImplementedError()
+        img = images.load(os.path.join(cls.TILESET, cls.IMG))
+        if cls.ANGLE:
+            img = rotate(img, cls.ANGLE)
+        return img
+
+
 class RandomizedTile(Tile):
     IMGDIR = None
     TILESET = None
@@ -47,29 +62,61 @@ class Wall(RandomizedTile):
 class Underground(RandomizedTile):
     IMGDIR = "underground"
 
-class Tunnel(Tile):
+class Tunnel(OrientatedTile):
 
     @classmethod
     def image(cls, neighbors):
-        connections = len([x for x in neighbors if 'walk' in x['behaviour']])
+        connections = [True if 'walk' in x['behaviour'] else False for x in neighbors]
+        conn_count = connections.count(True)
         # simple cases
-        if connections == 0:
+        cls.ANGLE = 0
+        if conn_count == 0:
             # return single point tunnel
-            pass
-        elif connections == 4:
+            cls.IMG = os.path.join('tunnel', 'tunnel_none')
+        elif conn_count == 4:
             # crossroads
-            pass
-        elif connections == 3:
-            # 3 point connector, rotated correctly
-            pass
-        elif connections == 1:
+            cls.IMG = os.path.join('tunnel', 'tunnel_crossroads')
+        elif conn_count == 1:
             # 1 point connector, roatated correctly
-            pass
-        elif connections == 2:
+            cls.IMG = os.path.join('tunnel', 'tunnel_1way')
+            # because of the ordering of neighbors, we use this formulation
+            for x, angle in zip(connections, (90, 270, 0, 180)):
+                if x:
+                    cls.ANGLE = angle
+                    break
+        elif conn_count == 3:
+            # 3 point connector, rotated correctly
+            cls.IMG = os.path.join('tunnel', 'tunnel_3way')
+            # find the missing connection.
+            for x, angle in zip(connections, (0, 180, 270, 90)):
+                if not x:
+                    cls.ANGLE = angle
+                    break
+        elif conn_count == 2:
             # Need to distinguish pass-through or corner, and
             # rotate correctly
-            pass
-        cls.IMG = os.path.join('tunnel', 'tunnel_none')
+            # neighbors is left, right then up, down
+            if connections[0] == connections[1]:
+                cls.IMG = os.path.join('tunnel', 'tunnel_passthrough')
+                if connections[0]:
+                    cls.ANGLE = 90
+            else:
+                cls.IMG = os.path.join('tunnel', 'tunnel_corner')
+                if connections[0]:
+                    if connections[2]:
+                        # left, up
+                        cls.ANGLE = 90
+                    else:
+                        # left, down
+                        cls.ANGLE = 180
+                else:
+                    if connections[2]:
+                        # right, up
+                        cls.ANGLE = 0
+                    else:
+                        # right, down
+                        cls.ANGLE = 270
+
         return super(Tunnel, cls).image(neighbors)
         
 
-- 
2.34.1