From 2b3953c0d4af78ba379d49950cba222983d20c8a Mon Sep 17 00:00:00 2001
From: Peter Ward <peteraward@gmail.com>
Date: Mon, 28 Sep 2009 11:48:20 +1000
Subject: Random bot colours, improvements to random bots.

---
 bots.py  | 35 ++++++++++++++++++++++++++++++++---
 snake.py | 15 +++++++++------
 2 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/bots.py b/bots.py
index dba440d..f3e7cee 100644
--- a/bots.py
+++ b/bots.py
@@ -1,9 +1,14 @@
 import random
 
+from common import *
+
 def right_bot(board, (x, y)):
     return 'R'
 
 def random_bot(board, (x, y)):
+    return random.choice('UDLR')
+
+def random_bounds_bot(board, (x, y)):
     height = len(board)
     width = len(board[0])
     moves = []
@@ -15,9 +20,33 @@ def random_bot(board, (x, y)):
         moves.append('U')
     if y < height - 1:
         moves.append('D')
-    return random.choice(moves)
 
-def random_bot2(board, (x, y)):
+    move = 'U'
+    while moves and move not in moves:
+        move = random_bot(board, (x, y))
+    return move
+
+def random_square_bot(board, (x, y)):
+    def in_bounds(x, y, w, h):
+        return x >= 0 and y >= 0 and x < w and y < h
+
+    h = len(board)
+    w = len(board[0])
+
+    todo = directions.keys()
+
     move = random_bot(board, (x, y))
-    nx, ny = x
+    dx, dy = directions[move]
+    nx = x + dx
+    ny = y + dy
+
+    while todo and in_bounds(nx, ny, w, h) and \
+          board[ny][nx] not in (Squares.EMPTY, Squares.APPLE):
+        if move in todo:
+            todo.remove(move)
+        move = random_bot(board, (x, y))
+        dx, dy = directions[move]
+        nx = x + dx
+        ny = y + dy
+    return move
 
diff --git a/snake.py b/snake.py
index 9350502..a4b7112 100755
--- a/snake.py
+++ b/snake.py
@@ -3,7 +3,7 @@
 from __future__ import division
 
 import string
-import random
+from random import randint
 from collections import deque
 from copy import deepcopy
 import traceback
@@ -49,8 +49,8 @@ class SnakeEngine(object):
         self.new_game(rows, columns, n_apples)
 
     def get_random_position(self):
-        x = random.randint(0, self.columns - 1)
-        y = random.randint(0, self.rows - 1)
+        x = randint(0, self.columns - 1)
+        y = randint(0, self.rows - 1)
         return (x, y)
 
     def new_game(self, rows, columns, n_apples):
@@ -98,7 +98,7 @@ class SnakeEngine(object):
         else:
             raise KeyError, "Could not insert snake into the board."
 
-        colour = (255, 0, 0)
+        colour = (randint(0, 255), randint(0, 255), randint(0, 255))
         self.bots[letter] = [bot, colour, deque([(x, y)])]
         self.board[y][x] = letter.upper()
         return letter
@@ -215,7 +215,7 @@ class SnakeEngine(object):
 
             # Update the display.
             pygame.display.flip()
-            clock.tick(5)
+            clock.tick(20)
 
             # Let the snakes move!
             self.update_snakes()
@@ -226,7 +226,10 @@ class SnakeEngine(object):
 if __name__ == '__main__':
     from bots import *
 
-    game = SnakeEngine(25, 25, 10)
+    game = SnakeEngine(25, 25, 50)
     game.add_bot(right_bot)
+    game.add_bot(random_bot)
+    game.add_bot(random_bounds_bot)
+    game.add_bot(random_square_bot)
     game.run()
 
-- 
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