snake: bc310be50e73 engine.py

snake

view engine.py @ 124:bc310be50e73

pattern cell always has snake_type

author	Daniil Alexeyevsky <me.dendik@gmail.com>
date	Mon, 20 Dec 2010 15:48:15 +0300
parents	793011c1119e
children	b7d2bfd5860d

line source

1 import random as rnd

2 import Tkinter as tk

3 import snake

5 directions = [(0,1), (1,0), (0,-1), (-1,0)]

7 class Dict(dict):

8 pass

10 class Cell(object):

11 def __init__(self, x, y, canvas = None):

12 self.x = x

13 self.y = y

14 self.canvas = canvas

15 self.snake = None

16 self.type = 'empty'

17 return

18 def redraw(self, offset, c_size):

20 x0=offset[0] + self.x*c_size

21 y0=offset[1] + self.y*c_size

22 x1=offset[0] + (self.x+1)*c_size

23 y1=offset[1] + (self.y+1)*c_size

24 x2=offset[0] + (self.x+1/2.0)*c_size

25 if self.type == 'wall':

26 self.canvas.create_rectangle(x0, y0, x1, y1, fill="grey")

27 pass

28 elif self.type == 'empty':

29 self.canvas.create_rectangle(x0, y0, x1, y1, fill="black")

30 pass

31 elif self.type == 'body':

32 self.canvas.create_rectangle(x0, y0, x1, y1, fill=self.snake.color)

33 pass

34 elif self.type == 'head':

35 self.canvas.create_oval(x0, y0, x1, y1, fill=self.snake.color)

36 pass

37 elif self.type == 'tail':

38 self.canvas.create_polygon(x0, y0, x1, y0, x2, y1, fill=self.snake.color)

39 pass

40 return

41 def __eq__(self, pattern):

42 if pattern.type == 'any':

43 return True

44 if pattern.type != self.type:

45 return False

46 if pattern.snake_type == 'my' and pattern.snake != self.snake:

47 return False

48 elif pattern.snake_type == 'enemy' and pattern.snake == self.snake:

49 return False

50 return True

51 def clear(self):

52 self.snake = None

53 self.type = 'empty'

54 return

57 class Engine(object):

58 def __init__(self, canvas):

59 self.canvas = canvas

60 self.w = min(canvas.winfo_height(), canvas.winfo_width())

61 self.h = min(canvas.winfo_height(), canvas.winfo_width())

62 self.snakes = [None, None, None, None]

63 self.init_field()

64 self.start_snake_length = 10

65 return

66 def init_field (self):

67 self.field = Dict()

68 self.field.w = 31

69 self.field.h = 31

70 f_w = self.field.w

71 f_h = self.field.h

72 for x in range(f_w):

73 for y in range(f_h):

74 self.field[x, y] = Cell(x, y, self.canvas)

75 for y in range(f_h):

76 self.field[0, y].type = 'wall'

77 self.field[f_w-1, y].type = 'wall'

78 for x in range(1,f_w-1):

79 self.field[x, 0].type = 'wall'

80 self.field[x, f_h-1].type = 'wall'

81 self.refill()

82 self.redraw()

83 return

84 def step(self):

85 for i, snake in enumerate(self.snakes):

86 if snake != None:

87 if len(snake.cells) == 0:

88 self.snakes[i] = None

89 continue

90 self.legal_moves(snake)

91 self.move_snake(snake)

92 self.refill()

93 self.redraw()

94 return

95 def move_snake(self, snake):

96 head = snake.cells[0]

97 for rule in snake.rules:

98 for direction in snake.legal_dir:

99 rule.rotate(direction)

100 if rule.applies(self.field, head.x, head.y) == True:

101 self.move_do(snake, direction)

102 return

103 if snake.legal_dir != []:

104 self.move_do(snake, snake.legal_dir[0])

105 pass

106 return

107 def move_do(self, snake, applied_dir):

108 head = snake.cells[0]

109 dir_cell = self.field[head.x + applied_dir[0], head.y + applied_dir[1]]

110 if dir_cell.type == 'empty':

111 snake.cells.insert(0,dir_cell)

112 del snake.cells[-1]

113 pass

114 elif (dir_cell.type == 'tail' and dir_cell.snake != snake):

115 snake.cells.insert(0,dir_cell)

116 del dir_cell.snake.cells[-1]

117 pass

118

119 def create_snake(self, snake_number):

120 cells_id = []

121 f_h = self.field.h

122 f_w = self.field.w

123 for y in range(self.start_snake_length):

124 cells_id.append(((f_w-1)/2, y+1))

125 for rot_num in range(snake_number - 1):

126 for i, cell in enumerate(cells_id):

127 cells_id[i] = (cell[1],min(f_h, f_w)-cell[0])

128 cells = []

129 for cell in cells_id:

130 cells.append(self.field[cell])

131 color_dic = {

132 1:'blue',

133 2:'green',

134 3:'yellow',

135 4:'red',}

136 self.snakes[snake_number-1] = snake.Snake(cells, color_dic[snake_number])

137 return self.snakes[snake_number-1]

138 def refill(self):

139 f_w = self.field.w

140 f_h = self.field.h

141 for x in range(1,f_w-1):

142 for y in range(1,f_h-1):

143 self.field[x, y].type = 'empty'

144 self.field[x, y].snake = None

145 pass

146 for snake in self.snakes:

147 if snake == None:

148 pass

149 else:

150 snake.fill()

151 pass

152 return

153 def redraw(self):

154 self.canvas.delete("all")

155 w = self.canvas.winfo_width()

156 h = self.canvas.winfo_height()

157 cw = w/float(self.field.w)

158 ch = h/float(self.field.h)

159 c = min(cw, ch)

160 field_geometry = (self.field.w*c,self.field.h*c)

161 offset = ((w - field_geometry[0])/2.0, (h - field_geometry[1])/2.0)

162 for cell_coord in self.field:

163 self.field[cell_coord].redraw(offset, c)

164 return

165 def legal_moves(self, snake):

166 snake.legal_dir = []

167 head = snake.cells[0]

168 for direction in directions:

169 dir_cell = self.field[head.x + direction[0], head.y + direction[1]]

170 if (dir_cell.type == 'empty' or (dir_cell.type == 'tail' and dir_cell.snake != snake)):

171 snake.legal_dir.append(direction)

172 rnd.shuffle(snake.legal_dir)

173 return

174