snake: b38281ca9b5c engine.py

snake

view engine.py @ 107:b38281ca9b5c

fixed random sell snake movement

author	Alex Martynov <martiran@kodomo.fbb.msu.ru>
date	Mon, 20 Dec 2010 11:52:45 +0300
parents	020c62119e6f
children	d29a90f5095d

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)]

6 tm = [[0, -1], [1, 0]]

8 class Cell(object):

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

10 self.x = x

11 self.y = y

12 self.canvas = canvas

13 self.snake = None

14 self.type = 'empty'

15 return

16 def redraw(self):

17 field_size = min(self.canvas.winfo_height(), self.canvas.winfo_width())

18 offset = ((self.canvas.winfo_width() - field_size)/2.0, (self.canvas.winfo_height() - field_size)/2.0)

19 x0=offset[0] + self.x*field_size/21.0

20 y0=offset[1] + self.y*field_size/21.0

21 x1=offset[0] + (self.x+1)*field_size/21.0

22 y1=offset[1] + (self.y+1)*field_size/21.0

23 x2=offset[0] + (self.x+1/2.0)*field_size/21.0

24 if self.type == 'wall':

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

26 pass

27 elif self.type == 'empty':

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

29 pass

30 elif self.type == 'body':

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

32 pass

33 elif self.type == 'head':

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

35 pass

36 elif self.type == 'tail':

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

38 pass

39 return

40 def __eq__(self, pattern):

41 if pattern.type == 'any':

42 return True

43 if pattern.type != self.type:

44 return False

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

46 return False

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

48 return False

49 return True

50 def clear(self):

51 self.snake = None

52 self.type = 'empty'

53 return

56 class Engine(object):

57 def __init__(self, canvas):

58 self.canvas = canvas

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

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

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

62 self.init_field()

63 return

64 def init_field (self):

65 self.field = {}

66 for x in range(21):

67 for y in range(21):

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

69 for y in range(21):

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

71 self.field[20, y].type = 'wall'

72 for x in range(1,20):

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

74 self.field[x, 20].type = 'wall'

75 self.refill()

76 self.redraw()

77 return

78 def step(self):

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

80 if snake != None:

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

82 self.snakes[i] = None

83 continue

84 self.legal_moves(snake)

85 self.move_snake(snake)

86 self.refill()

87 self.redraw()

88 return

89 def move_snake(self, snake):

90 head = snake.cells[0]

91 for rule in snake.rules:

92 for direction in snake.legal_dir:

93 rule.rotate(direction)

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

95 self.move_do(snake, direction)

96 return

97 if snake.legal_dir != []:

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

99 pass

100 return

101 def move_do(self, snake, applied_dir):

102 head = snake.cells[0]

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

104 if dir_cell.type == 'empty':

105 snake.cells.insert(0,dir_cell)

106 del snake.cells[-1]

107 pass

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

109 snake.cells.insert(0,dir_cell)

110 del dir_cell.snake.cells[-1]

111 pass

112

113 def create_snake(self, snake_number):

114 cells_id = []

115 for y in range(10):

116 cells_id.append((10, y+1))

117 for rot_num in range(snake_number - 1):

118 for i, cell in enumerate(cells_id):

119 cells_id[i] = ((tm[0][0]*(cell[0]-10) + tm[0][1]*(cell[1]-10))+10,(tm[1][0]*(cell[0]-10) + tm[1][1]*(cell[1]-10))+10)

120 cells = []

121 for cell in cells_id:

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

123 color_dic = {

124 1:'blue',

125 2:'green',

126 3:'yellow',

127 4:'red',}

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

129 return self.snakes[snake_number-1]

130 def refill(self):

131 for x in range(1,20):

132 for y in range(1,20):

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

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

135 pass

136 for snake in self.snakes:

137 if snake == None:

138 pass

139 else:

140 snake.fill()

141 pass

142 return

143 def redraw(self):

144 self.canvas.delete(all)

145 for cell_coord in self.field:

146 self.field[cell_coord].redraw()

147 return

148 def legal_moves(self, snake):

149 snake.legal_dir = []

150 for direction in directions:

151 dir_cell = self.field[snake.cells[0].y + direction[0], snake.cells[0].x + direction[1]]

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

153 snake.legal_dir.append(direction)

154 rnd.shuffle(snake.legal_dir)

155 return

156