Mercurial > rinkhals
annotate gamelib/misc.py @ 315:0a3161fec434
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author | Neil Muller <drnlmuller@gmail.com> |
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date | Sat, 05 Sep 2009 18:56:33 +0000 |
parents | 1a7000c8211c |
children | 82a18615a0ab |
rev | line source |
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69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
1 # Holder for misc useful classes |
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
2 |
241
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
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3 import random |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
4 |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
5 class Position(object): |
100 | 6 """2D position / vector""" |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
7 |
100 | 8 def __init__(self, x, y): |
9 self.x = x | |
10 self.y = y | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
11 |
100 | 12 def to_tuple(self): |
13 return self.x, self.y | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
14 |
100 | 15 def dist(self, b): |
16 """Gives the distance to another position""" | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
17 |
107 | 18 return max(abs(self.x - b.x), abs(self.y - b.y)) |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
19 |
100 | 20 def __sub__(self, b): |
21 return Position(self.x - b.x, self.y - b.y) | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
22 |
100 | 23 def __add__(self, b): |
24 return Position(self.x + b.x, self.y + b.y) | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
25 |
100 | 26 def left_of(self, b): |
27 return self.x < b.x | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
28 |
100 | 29 def right_of(self, b): |
30 return self.x > b.x | |
69
18db99fda6bd
Move spawing code from engine to gameboard - seems more natural.
Neil Muller <drnlmuller@gmail.com>
parents:
diff
changeset
|
31 |
100 | 32 def __eq__(self, b): |
33 return self.x == b.x and self.y == b.y | |
241
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
34 |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
35 class WeightedSelection(object): |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
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36 def __init__(self, weightings=None): |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
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37 self.weightings = [] |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
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38 self.total = 0 |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
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39 if weightings: |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
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40 for item, weight in weightings: |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
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41 self.weightings.append((item, weight)) |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
42 self.total += weight |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
43 |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
44 def choose(self): |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
45 roll = random.uniform(0, self.total) |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
46 for item, weight in self.weightings: |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
47 if roll < weight: |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
48 return item |
1a7000c8211c
Demolition foxes, including better fox selection.
Jeremy Thurgood <firxen@gmail.com>
parents:
107
diff
changeset
|
49 roll -= weight |