# HG changeset patch
# User Stefano Rivera <stefano@rivera.za.net>
# Date 1316246236 -7200
# Node ID 09ff0abf3e0f8f22d7b7ce00342913ba0eb92f6a
# Parent  7f6a28456fda7cfd3bd9f55a952951f254627bf1
Filter keys at queueing time too

diff -r 7f6a28456fda -r 09ff0abf3e0f mamba/snake.py
--- a/mamba/snake.py	Sat Sep 17 14:36:31 2011 +0200
+++ b/mamba/snake.py	Sat Sep 17 09:57:16 2011 +0200
@@ -99,6 +99,15 @@
             world.interact(segment)
 
     def send_new_direction(self, orientation):
+        # Filter illegal & noop orientation changes
+        if self._orientation_changes:
+            tip = self._orientation_changes[-1]
+        else:
+            tip = self.head.orientation
+        if ((0 == orientation[0] == tip[0])
+            or (0 == orientation[1] == tip[1])):
+            return
+
         self._orientation_changes.append(orientation)
         # Cap queue length:
         self._orientation_changes = self._orientation_changes[:3]