snake: engine.py annotate

snake

annotate engine.py @ 44:a7e53eb3f54d

snake.py: added some (ugly) docstrings, closes #7

author	Daniil Alexeyevsky <me.dendik@gmail.com>
date	Sun, 19 Dec 2010 23:24:15 +0300
parents	76d0514d1ef9
children	85221e4417b7

rev	line source
martiran@12	1 import random as rnd
martiran@15	2 import Tkinter as tk
martiran@12	3
martiran@6	4 directions = [(0,1), (1,0), (0,-1), (-1,0)]
martiran@9	5 rtm = [[0, -1], [1, 0]]
martiran@1	6
martiran@5	7 class Cell(object):
martiran@15	8 def __init__(self, x, y, canvas = None):
martiran@1	9 self.x = x
martiran@1	10 self.y = y
martiran@1	11 self.canvas = canvas
martiran@1	12 self.snake = None
martiran@28	13 self.type = 'empty'
martiran@1	14 return
martiran@6	15 def redraw(self):
martiran@32	16 field_size = min(self.canvas.height, self.canvas.width)
martiran@32	17 offset = (self.canvas.width - field_size, self.canvas.hieght - field_size)
martiran@15	18 if self.type == 'wall':
martiran@15	19 self.canvas.create_rectangle(offset[0], offset[1], offset[0] + self.xfield_size/21.0, offset[1] + self.yfield_size/21.0, fill="grey")
martiran@15	20 pass
martiran@15	21 elif self.type == 'empty':
martiran@15	22 self.canvas.create_rectangle(offset[0], offset[1], offset[0] + self.xfield_size/21.0, offset[1] + self.yfield_size/21.0, fill="black")
martiran@15	23 pass
martiran@15	24 elif self.type == 'body':
martiran@15	25 self.canvas.create_rectangle(offset[0], offset[1], offset[0] + self.xfield_size/21.0, offset[1] + self.yfield_size/21.0, fill=self.snake.color)
martiran@15	26 pass
martiran@15	27 elif self.type == 'head':
martiran@15	28 self.canvas.create_oval(offset[0], offset[1], offset[0] + self.xfield_size/21.0, offset[1] + self.yfield_size/21.0, fill=self.snake.color)
martiran@15	29 pass
martiran@15	30 elif self.type == 'tail':
martiran@15	31 self.canvas.create_polygon(offset[0], offset[1], offset[0] + self.xfield_size/21.0, offset[1], offset[0] + self.xfield_size/(221.0), offset[1] + self.yfield_size/21.0, fill=self.snake.color)
martiran@15	32 pass
martiran@15	33 return
martiran@6	34 def __eq__(self, pattern):
martiran@6	35 if pattern.type == self.type:
martiran@6	36 return True
martiran@6	37 else:
martiran@6	38 return False
martiran@6	39 return
martiran@6	40 def clear(self):
martiran@1	41 self.snake = None
martiran@1	42 self.type = 'empty'
martiran@1	43 return
martiran@1	44
martiran@2	45
martiran@5	46 class Engine(object):
martiran@6	47 def __init__(self, canvas):
martiran@1	48 self.canvas = canvas
martiran@28	49 #self.w = min(canvas.height, canvas.width)
martiran@28	50 #self.h = min(canvas.height, canvas.width)
martiran@12	51 self.snakes = [None, None, None, None]
martiran@9	52 self.init_field()
martiran@9	53 return
martiran@9	54 def init_field (self):
martiran@9	55 self.field = {}
martiran@9	56 for x in range(21):
martiran@9	57 for y in range(21):
martiran@9	58 self.field[x, y] = Cell(x, y, self.canvas)
martiran@9	59 for y in range(21):
martiran@9	60 self.field[0, y].type = 'wall'
martiran@9	61 self.field[20, y].type = 'wall'
martiran@9	62 for x in range(1,20):
martiran@9	63 self.field[x, 0].type = 'wall'
martiran@9	64 self.field[x, 20].type = 'wall'
martiran@1	65 return
martiran@6	66 def step(self):
martiran@9	67 for snake in self.snakes:
martiran@12	68 if snake == None:
martiran@12	69 pass
martiran@12	70 else:
martiran@12	71 self.legal_moves()
martiran@12	72 self.move_snake(snake)
martiran@12	73 self.refill()
martiran@9	74 self.redraw()
martiran@9	75 return
martiran@9	76 def move_snake(self, snake):
martiran@12	77 applied_dir = None
martiran@12	78 for rule in snake.rules:
martiran@12	79 if applied_dir != None:
martiran@12	80 choose_dir = []
martiran@12	81 for direction in snake.legal_dir:
martiran@12	82 rule.direction = direction
martiran@12	83 if rule.applies() == True:
martiran@12	84 choose_dir.append(direction)
martiran@12	85 pass
martiran@12	86 pass
martiran@12	87 if len(choose_move) != 0:
martiran@12	88 applied_dir = choose_dir[int(rnd.random()*len(choose_dir))]
martiran@12	89 pass
martiran@12	90 else:
martiran@17	91 dir_cell = self.field[snake.cells[0].y + applied_dir[0], snake.cells[0].x + applied_dir[1]]
martiran@17	92 if dir_cell.type == 'empty':
martiran@17	93 snake.cells.insert(0,dir_cell)
martiran@17	94 del snake.cells[-1]
martiran@12	95 pass
martiran@12	96 elif (dir_cell.type == 'tail' and dir_cell.snake != snake):
martiran@17	97 snake.cells.insert(0,dir_cell)
martiran@17	98 del dir_cell.snake.cells[-1]
martiran@12	99 pass
martiran@12	100 break
martiran@12	101 if applied_dir == None:
martiran@12	102 applied_dir = legal_dir[int(rnd.random()*len(legal_dir))]
martiran@17	103 dir_cell = self.field[snake.cells[0].y + applied_dir[0], snake.cells[0].x + applied_dir[1]]
martiran@17	104 if dir_cell.type == 'empty':
martiran@17	105 snake.cells.insert(0,dir_cell)
martiran@17	106 del snake.cells[-1]
martiran@12	107 pass
martiran@12	108 elif (dir_cell.type == 'tail' and dir_cell.snake != snake):
martiran@17	109 snake.cells.insert(0,dir_cell)
martiran@17	110 del dir_cell.snake.cells[-1]
martiran@12	111 pass
martiran@12	112 pass
martiran@14	113 return
martiran@6	114 def create_snake(self, snake_number):
martiran@32	115
martiran@1	116 pass
martiran@6	117 def refill(self):
martiran@12	118 for x in range(1,20):
martiran@12	119 for y in range(1,20):
martiran@12	120 self.field[x, y].type = 'empty'
martiran@31	121 self.field[x, y].snake = None
martiran@12	122 pass
martiran@12	123 for snake in self.snakes:
martiran@12	124 if snake == None:
martiran@12	125 pass
martiran@12	126 else:
martiran@31	127 snake.fill()
martiran@12	128 pass
martiran@14	129 return
martiran@9	130 def redraw(self):
martiran@16	131 self.canvas.delete(all)
martiran@32	132 for cell_coord in self.field:
martiran@32	133 self.field[cell_coord].redraw()
martiran@15	134 return
martiran@6	135 def legal_moves(self, snake):
martiran@6	136 snake.legal_dir = []
martiran@6	137 for direction in directions:
martiran@17	138 dir_cell = self.field[snake.cells[0].y + direction[0], snake.cells[0].x + direction[1]]
martiran@12	139 if (dir_cell.type == 'empty' or (dir_cell.type == 'tail' and dir_cell.snake != snake)):
martiran@6	140 snake.legal_dir.append(direction)
martiran@6	141 return
martiran@6	142 return
martiran@6	143