Mercurial > rinkhals

annotate gamelib/engine.py @ 31:3c4db7bba432

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Add 's' as a key for starting the game from the menu.
author Simon Cross <hodgestar@gmail.com>
date Sun, 30 Aug 2009 18:56:09 +0000
parents 2eec29085060
children 18db99fda6bd
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5d58a5b13731 Extremely rudimentary game engine.
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1 """Game engine and states."""
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2
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3 from pgu.engine import Game, State, Quit
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4 import pygame
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5 from pygame.locals import USEREVENT, QUIT, KEYDOWN, K_ESCAPE, K_n, K_d, K_s
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6
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7 from tiles import TILE_MAP
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8 import gameboard
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9 import animal
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10 import random
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12 class Engine(Game):
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13 def __init__(self, main_menu_app):
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14 self.main_menu_app = main_menu_app
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15 self.clock = pygame.time.Clock()
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16
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17 def tick(self):
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18 """Tic toc."""
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19 pygame.time.wait(10)
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20
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21 def create_game_board(self):
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22 self.gameboard = gameboard.GameBoard()
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23
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24 class MainMenuState(State):
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25 def event(self, e):
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26 if events_equal(e, START_DAY):
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27 self.game.create_game_board()
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28 return DayState(self.game)
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29 elif e.type is KEYDOWN:
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30 if e.key == K_ESCAPE:
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31 return Quit(self.game)
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32 elif e.key == K_s:
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33 self.game.create_game_board()
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34 return DayState(self.game)
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35 elif e.type is not QUIT:
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36 self.game.main_menu_app.event(e)
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37
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38 def paint(self, screen):
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39 screen.fill((0,0,0))
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40 self.game.main_menu_app.paint(screen)
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41 pygame.display.flip()
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42
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43 def update(self, screen):
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44 update = self.game.main_menu_app.update(screen)
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45 pygame.display.update(update)
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46
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47 class DayState(State):
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48 def init(self):
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49 """Add some chickens to the farm"""
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50 self.game.gameboard.tv.sun(True)
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51
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52 # disable timer
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53 pygame.time.set_timer(MOVE_FOX_ID, 0)
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54 # Very simple, we walk around the tilemap, and, for each farm tile,
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55 # we randomly add a chicken (1 in 10 chance) until we have 5 chickens
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56 # or we run out of board
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57 self.game.gameboard.clear_foxes()
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58 chickens = len(self.game.gameboard.chickens)
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59 x, y = 0, 0
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60 width, height = self.game.gameboard.tv.size
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61 while chickens < 5:
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62 if x < width:
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63 tile = self.game.gameboard.tv.get((x, y))
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64 else:
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65 y += 1
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66 if y >= height:
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67 break
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68 x = 0
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69 continue
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70 # See if we place a chicken
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71 if 'grassland' == TILE_MAP[tile]:
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72 # Farmland
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73 roll = random.randint(1, 20)
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74 # We don't place within a tile of the fence, this is to make things
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75 # easier
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76 for xx in range(x-1, x+2):
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77 if xx >= height or xx < 0:
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78 continue
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79 for yy in range(y-1, y+2):
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80 if yy >= height or yy < 0:
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81 continue
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82 neighbour = self.game.gameboard.tv.get((xx, yy))
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83 if 'fence' == TILE_MAP[neighbour]:
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84 # Fence
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85 roll = 10
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86 if roll == 1:
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87 # Create a chicken
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88 chickens += 1
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89 chick = animal.Chicken((x, y))
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90 self.game.gameboard.add_chicken(chick)
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91 x += 1
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92
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93 def event(self, e):
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94 if events_equal(e, START_NIGHT):
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95 return NightState(self.game)
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96 elif e.type is KEYDOWN and e.key == K_ESCAPE:
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97 return MainMenuState(self.game)
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98 elif e.type is KEYDOWN and e.key == K_n:
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99 return pygame.event.post(START_NIGHT)
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100 elif events_equal(e, GO_MAIN_MENU):
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101 return MainMenuState(self.game)
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102 elif e.type is not QUIT:
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103 self.game.gameboard.event(e)
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104
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105 def paint(self, screen):
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106 self.game.gameboard.paint(screen)
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107 pygame.display.flip()
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108
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109 def update(self, screen):
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110 update = self.game.gameboard.update(screen)
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111 pygame.display.update(update)
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112
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113 def loop(self):
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114 self.game.gameboard.loop()
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115
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116 class NightState(State):
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117 def init(self):
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118 """Add some foxes to the farm"""
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119 self.game.gameboard.tv.sun(False)
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120
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121 # Add a timer to the event queue
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122 self.cycle_count = 0
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123 pygame.time.set_timer(MOVE_FOX_ID, 300)
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124 # Very simple, we walk around the tilemap, and, for each farm tile,
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125 # we randomly add a chicken (1 in 10 chance) until we have 5 chickens
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126 # or we run out of board
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127 foxes = len(self.game.gameboard.foxes)
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128 x, y = 0, 0
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129 width, height = self.game.gameboard.tv.size
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130 while foxes < 5:
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131 if x < width:
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132 tile = self.game.gameboard.tv.get((x, y))
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133 else:
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134 y += 1
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135 if y >= height:
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136 break
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137 x = 0
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138 continue
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139 # See if we place a fox
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140 if TILE_MAP[tile] == 'woodland':
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141 # Forest
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142 roll = random.randint(1, 20)
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143 if roll == 1:
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144 # Create a fox
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145 foxes += 1
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146 fox = animal.Fox((x, y))
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147 self.game.gameboard.add_fox(fox)
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148 x += 5
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149
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150 def event(self, e):
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151 if events_equal(e, START_DAY):
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152 return DayState(self.game)
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153 elif e.type is KEYDOWN and e.key == K_d:
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154 return pygame.event.post(START_DAY)
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155 elif e.type is KEYDOWN and e.key == K_ESCAPE:
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156 return MainMenuState(self.game)
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157 elif e.type is MOVE_FOX_ID:
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158 self.cycle_count += 1
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159 if self.cycle_count > 15:
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160 return pygame.event.post(START_DAY)
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161 return self.game.gameboard.move_foxes()
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162 elif e.type is not QUIT:
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163 self.game.gameboard.event(e)
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164
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165 def loop(self):
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166 self.game.gameboard.loop()
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167
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168 def paint(self, screen):
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169 self.game.gameboard.paint(screen)
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170 pygame.display.flip()
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171
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172 def update(self, screen):
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173 update = self.game.gameboard.update(screen)
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174 pygame.display.update(update)
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175
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176 # pygame events
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177
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178 def events_equal(e1, e2):
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179 """Compare two user events."""
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180 return (e1.type is e2.type and e1.name == e2.name)
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181
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182 START_DAY = pygame.event.Event(USEREVENT, name="START_DAY")
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183 START_NIGHT = pygame.event.Event(USEREVENT, name="START_NIGHT")
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184 GO_MAIN_MENU = pygame.event.Event(USEREVENT, name="GO_MAIN_MENU")
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185 MOVE_FOX_ID = USEREVENT + 1
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186 MOVE_FOXES = pygame.event.Event(MOVE_FOX_ID, name="MOVE_FOXES")
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187 QUIT = pygame.event.Event(QUIT)