Chunk.pi now loads the 4 adjacent chunks (only blocks data).

chunk.py

@@ -284,6 +284,46 @@ class ChunkRenderer(object):
         return self._right_blocklight
     right_blocklight = property(_load_right_blocklight)
 
+    def _load_up_right(self):
+        """Loads and sets data from upper-right chunk"""
+        chunk_path = self.world.get_chunk_path(self.coords[0] + 1, self.coords[1])
+        try:
+            chunk_data = get_lvldata(chunk_path)
+            self._up_right_skylight = get_skylight_array(chunk_data)
+            self._up_right_blocklight = get_blocklight_array(chunk_data)
+            self._up_right_blocks = get_blockarray(chunk_data)
+        except IOError:
+            self._up_right_skylight = None
+            self._up_right_blocklight = None
+            self._up_right_blocks = None
+    
+    def _load_up_right_blocks(self):
+        """Loads and returns upper-right block array"""
+        if not hasattr(self, "_up_right_blocks"):
+            self._load_up_right()
+        return self._up_right_blocks
+    up_right_blocks = property(_load_up_right_blocks)
+    
+    def _load_up_left(self):
+        """Loads and sets data from upper-left chunk"""
+        chunk_path = self.world.get_chunk_path(self.coords[0], self.coords[1] - 1)
+        try:
+            chunk_data = get_lvldata(chunk_path)
+            self._up_left_skylight = get_skylight_array(chunk_data)
+            self._up_left_blocklight = get_blocklight_array(chunk_data)
+            self._up_left_blocks = get_blockarray(chunk_data)
+        except IOError:
+            self._up_left_skylight = None
+            self._up_left_blocklight = None
+            self._up_left_blocks = None
+    
+    def _load_up_left_blocks(self):
+        """Loads and returns lower-left block array"""
+        if not hasattr(self, "_up_left_blocks"):
+            self._load_up_left()
+        return self._up_left_blocks
+    up_left_blocks = property(_load_up_left_blocks)
+
     def _hash_blockarray(self):
         """Finds a hash of the block array"""
         if hasattr(self, "_digest"):