annotate gamelib/misc.py @ 431:129de5883524

Moved intermediate position generation to a more suitable location.
author Jeremy Thurgood <firxen@gmail.com>
date Sat, 21 Nov 2009 16:46:12 +0000
parents e89a1afe4e84
children 96dbf2c8506e
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1 # Holder for misc useful classes
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3 import random
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5 from pygame.locals import KEYDOWN, K_ESCAPE
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6 from pgu import gui
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7 from pgu.algo import getline
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9 import serializer
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11 class Position(serializer.Simplifiable):
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12 """2D position / vector"""
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14 SIMPLIFY = ['x', 'y', 'z']
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16 def __init__(self, x, y, z=0):
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17 self.x = x
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18 self.y = y
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19 self.z = z
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21 def to_tile_tuple(self):
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22 return self.x, self.y
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24 def dist(self, b):
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25 """Gives the distance to another position"""
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26
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27 return max(abs(self.x - b.x), abs(self.y - b.y), abs(self.z - b.z))
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29 def __sub__(self, b):
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30 return Position(self.x - b.x, self.y - b.y, self.z - b.z)
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32 def __add__(self, b):
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33 return Position(self.x + b.x, self.y + b.y, self.z + b.z)
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34
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35 def left_of(self, b):
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36 return self.x < b.x
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38 def right_of(self, b):
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39 return self.x > b.x
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41 def __eq__(self, b):
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42 return self.x == b.x and self.y == b.y and self.z == b.z
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43
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44 def intermediate_positions(self, b):
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45 """Only operates in two dimensions."""
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46 if max(abs(self.x - b.x), abs(self.y - b.y)) <= 1:
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47 # pgu gets this case wrong on occasion.
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48 return [b]
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49 start = self.to_tile_tuple()
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50 end = b.to_tile_tuple()
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51 points = getline(start, end)
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52 points.remove(start) # exclude start_pos
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53 if end not in points:
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54 # Rounding errors in getline cause this
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55 points.append(end)
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56 return [Position(p[0], p[1]) for p in points]
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57
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58 class WeightedSelection(object):
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59 def __init__(self, weightings=None):
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60 self.weightings = []
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61 self.total = 0
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62 if weightings:
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63 for item, weight in weightings:
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64 self.weightings.append((item, weight))
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65 self.total += weight
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66
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67 def choose(self):
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68 roll = random.uniform(0, self.total)
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69 for item, weight in self.weightings:
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70 if roll < weight:
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71 return item
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72 roll -= weight
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73
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74 class CheckDialog(gui.Dialog):
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75 def __init__(self, **params):
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76 title = gui.Label('Are You Sure?')
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77 self.do_quit = False
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78 self.running = True
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79 tbl = gui.Table()
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80 tbl.tr()
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81 tbl.td(gui.Label("Do you REALLY want to exit this game?"), colspan=2)
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82 tbl.tr()
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83 tbl.td(gui.Spacer(0, 15), colspan=2)
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84 tbl.tr()
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85 yes_button = gui.Button('Yes')
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86 yes_button.connect(gui.CLICK, self.clicked, True)
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87 no_button = gui.Button('No')
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88 no_button.connect(gui.CLICK, self.clicked, False)
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89 tbl.td(no_button, align=-1)
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90 tbl.td(yes_button, align=1)
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91 gui.Dialog.__init__(self, title, tbl, **params)
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92
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93 def clicked(self, val):
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94 self.do_quit = val
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95 self.running = False
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96 self.close()
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97
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98 def event(self, e):
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99 if e.type == KEYDOWN and e.key == K_ESCAPE:
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100 self.clicked(False)
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101 return True
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102 return gui.Dialog.event(self, e)
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103
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104 def check_exit():
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105 dialog = CheckDialog()
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106 dialog.open()
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107 return dialog
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108
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