Added directions.

robotgame/logic/direction.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+
+# This file is part of ROBOTGAME
+#
+# ROBOTGAME is free software: you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# ROBOTGAME is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# ROBOTGAME.  If not, see <http://www.gnu.org/licenses/>.
+#
+# ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
+#
+#                         direction.py
+#                     --------------------
+#       date created : Tue Aug 7 2012
+#          copyright : (C) 2012 Niels G. W. Serup
+#      maintained by : Niels G. W. Serup <ns@metanohi.name>
+
+"""Directions."""
+
+class Direction(object):
+    @staticmethod
+    def next_pos(pos):
+        raise NotImplementedError
+
+class Up(Direction):
+    @staticmethod
+    def next_pos(pos):
+        x, y = pos
+        return x, y - 1
+
+class Right(Direction):
+    @staticmethod
+    def next_pos(pos):
+        x, y = pos
+        return x + 1, y
+
+class Down(Direction):
+    @staticmethod
+    def next_pos(pos):
+        x, y = pos
+        return x, y + 1
+
+class Left(Direction):
+    @staticmethod
+    def next_pos(pos):
+        x, y = pos
+        return x - 1, y