snake

changeset 104:c68b54a43501
Rule.rotate now accepts target direction, not number of times to rotate
author: Daniil Alexeyevsky <me.dendik@gmail.com>
date: Mon, 20 Dec 2010 11:22:26 +0300
parents: 30d062a2d532
children: bfd8f8d778a8 7352863453bc
files: snake.py
diffstat: 1 files changed, 6 insertions(+), 3 deletions(-) [+]
[-]

snake.py 9 snake.py 9
snake.py 9
     1.1 --- a/snake.py	Mon Dec 20 04:03:55 2010 +0300
     1.2 +++ b/snake.py	Mon Dec 20 11:22:26 2010 +0300
     1.3 @@ -122,10 +122,13 @@
     1.4                          return False
     1.5          return True
     1.6  
     1.7 -    def rotate (self, rot):
     1.8 -        """Rotate rule pattern `rot` times counterclockwise."""
     1.9 -        for i in range(((rot % 4) + 4) % 4):
    1.10 +    def rotate (self, direction):
    1.11 +        """Rotate rule pattern to head in `direction`."""
    1.12 +        for i in range(4):
    1.13 +            if self.direction == direction:
    1.14 +                return
    1.15              self.rotate_ccw()
    1.16 +        raise AssertionError("Illegal direction: %s" % direction)
    1.17  
    1.18      def rotate_ccw(self):
    1.19          """Rotate rule pattern one time counterclockwise."""