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annotate gamelib/misc.py @ 246:592bfad67488

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Add 'You left' game over mode
author Neil Muller <drnlmuller@gmail.com>
date Sat, 05 Sep 2009 12:27:08 +0000
parents 1a7000c8211c
children 82a18615a0ab
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1 # Holder for misc useful classes
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3 import random
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5 class Position(object):
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6 """2D position / vector"""
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8 def __init__(self, x, y):
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9 self.x = x
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10 self.y = y
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12 def to_tuple(self):
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13 return self.x, self.y
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15 def dist(self, b):
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16 """Gives the distance to another position"""
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18 return max(abs(self.x - b.x), abs(self.y - b.y))
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20 def __sub__(self, b):
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21 return Position(self.x - b.x, self.y - b.y)
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23 def __add__(self, b):
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24 return Position(self.x + b.x, self.y + b.y)
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26 def left_of(self, b):
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27 return self.x < b.x
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29 def right_of(self, b):
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30 return self.x > b.x
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32 def __eq__(self, b):
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33 return self.x == b.x and self.y == b.y
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34
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35 class WeightedSelection(object):
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36 def __init__(self, weightings=None):
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37 self.weightings = []
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38 self.total = 0
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39 if weightings:
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40 for item, weight in weightings:
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41 self.weightings.append((item, weight))
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42 self.total += weight
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43
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44 def choose(self):
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45 roll = random.uniform(0, self.total)
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46 for item, weight in self.weightings:
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47 if roll < weight:
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48 return item
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49 roll -= weight