# HG changeset patch
# User Simon Cross <hodgestar@gmail.com>
# Date 1316295661 -7200
# Node ID ed752233f1aa923990194cfb14b13a4ec341273e
# Parent  5fdeb338848e7a608df051c4b3fd75373167a02b
Clamp distance moved per update to shorter side of tile.

diff -r 5fdeb338848e -r ed752233f1aa mamba/snake.py
--- a/mamba/snake.py	Sat Sep 17 23:32:21 2011 +0200
+++ b/mamba/snake.py	Sat Sep 17 23:41:01 2011 +0200
@@ -17,6 +17,9 @@
 
 class Snake(object):
 
+    # don't move more than one tile at once
+    MAX_DISTANCE = min(TILE_SIZE)
+
     def __init__(self, tile_pos, orientation):
         load_sound('crash', 'crash.ogg')
         self.segments = self.create_segments(tile_pos, orientation)
@@ -69,6 +72,7 @@
 
     def update(self, dt, world):
         ds = dt * self.speed + self.frac_ds
+        ds = min(ds, self.MAX_DISTANCE)
         ds, self.frac_ds = divmod(ds, 1)
         ds = int(ds)
         tile_state = self.head.get_tile_state()