snake: engine.py annotate

snake

annotate engine.py @ 119:0255870e79ce

snakes added

author	Alex Martynov <martiran@kodomo.fbb.msu.ru>
date	Mon, 20 Dec 2010 14:45:04 +0300
parents	793011c1119e
children	b7d2bfd5860d

rev	line source
martiran@12	1 import random as rnd
martiran@15	2 import Tkinter as tk
Alex@66	3 import snake
martiran@12	4
martiran@6	5 directions = [(0,1), (1,0), (0,-1), (-1,0)]
martiran@1	6
martiran@111	7 class Dict(dict):
martiran@111	8 pass
martiran@111	9
martiran@5	10 class Cell(object):
martiran@15	11 def __init__(self, x, y, canvas = None):
martiran@1	12 self.x = x
martiran@1	13 self.y = y
martiran@1	14 self.canvas = canvas
martiran@1	15 self.snake = None
martiran@28	16 self.type = 'empty'
martiran@1	17 return
martiran@113	18 def redraw(self, offset, c_size):
martiran@113	19
martiran@113	20 x0=offset[0] + self.x*c_size
martiran@113	21 y0=offset[1] + self.y*c_size
martiran@113	22 x1=offset[0] + (self.x+1)*c_size
martiran@113	23 y1=offset[1] + (self.y+1)*c_size
martiran@113	24 x2=offset[0] + (self.x+1/2.0)*c_size
martiran@15	25 if self.type == 'wall':
Alex@101	26 self.canvas.create_rectangle(x0, y0, x1, y1, fill="grey")
martiran@15	27 pass
martiran@15	28 elif self.type == 'empty':
Alex@101	29 self.canvas.create_rectangle(x0, y0, x1, y1, fill="black")
martiran@15	30 pass
martiran@15	31 elif self.type == 'body':
Alex@101	32 self.canvas.create_rectangle(x0, y0, x1, y1, fill=self.snake.color)
martiran@15	33 pass
martiran@15	34 elif self.type == 'head':
Alex@101	35 self.canvas.create_oval(x0, y0, x1, y1, fill=self.snake.color)
martiran@15	36 pass
martiran@15	37 elif self.type == 'tail':
Alex@101	38 self.canvas.create_polygon(x0, y0, x1, y0, x2, y1, fill=self.snake.color)
martiran@15	39 pass
martiran@15	40 return
martiran@6	41 def __eq__(self, pattern):
martiran@52	42 if pattern.type == 'any':
martiran@6	43 return True
martiran@52	44 if pattern.type != self.type:
martiran@6	45 return False
martiran@52	46 if pattern.snake_type == 'my' and pattern.snake != self.snake:
martiran@52	47 return False
martiran@52	48 elif pattern.snake_type == 'enemy' and pattern.snake == self.snake:
martiran@52	49 return False
martiran@52	50 return True
martiran@6	51 def clear(self):
martiran@1	52 self.snake = None
martiran@1	53 self.type = 'empty'
martiran@1	54 return
martiran@1	55
martiran@2	56
martiran@5	57 class Engine(object):
martiran@6	58 def __init__(self, canvas):
martiran@1	59 self.canvas = canvas
martiran@54	60 self.w = min(canvas.winfo_height(), canvas.winfo_width())
martiran@54	61 self.h = min(canvas.winfo_height(), canvas.winfo_width())
martiran@12	62 self.snakes = [None, None, None, None]
martiran@9	63 self.init_field()
martiran@111	64 self.start_snake_length = 10
martiran@9	65 return
martiran@9	66 def init_field (self):
martiran@111	67 self.field = Dict()
martiran@117	68 self.field.w = 31
martiran@117	69 self.field.h = 31
martiran@113	70 f_w = self.field.w
martiran@113	71 f_h = self.field.h
martiran@113	72 for x in range(f_w):
martiran@113	73 for y in range(f_h):
martiran@9	74 self.field[x, y] = Cell(x, y, self.canvas)
martiran@113	75 for y in range(f_h):
martiran@9	76 self.field[0, y].type = 'wall'
martiran@113	77 self.field[f_w-1, y].type = 'wall'
martiran@113	78 for x in range(1,f_w-1):
martiran@9	79 self.field[x, 0].type = 'wall'
martiran@113	80 self.field[x, f_h-1].type = 'wall'
Alex@103	81 self.refill()
Alex@93	82 self.redraw()
martiran@1	83 return
martiran@6	84 def step(self):
Alex@62	85 for i, snake in enumerate(self.snakes):
Alex@103	86 if snake != None:
Alex@103	87 if len(snake.cells) == 0:
Alex@103	88 self.snakes[i] = None
Alex@103	89 continue
Alex@66	90 self.legal_moves(snake)
martiran@12	91 self.move_snake(snake)
martiran@12	92 self.refill()
martiran@9	93 self.redraw()
martiran@9	94 return
martiran@9	95 def move_snake(self, snake):
martiran@105	96 head = snake.cells[0]
martiran@12	97 for rule in snake.rules:
martiran@105	98 for direction in snake.legal_dir:
martiran@105	99 rule.rotate(direction)
martiran@105	100 if rule.applies(self.field, head.x, head.y) == True:
martiran@105	101 self.move_do(snake, direction)
martiran@105	102 return
martiran@105	103 if snake.legal_dir != []:
Alex@99	104 self.move_do(snake, snake.legal_dir[0])
martiran@12	105 pass
martiran@14	106 return
Alex@94	107 def move_do(self, snake, applied_dir):
martiran@107	108 head = snake.cells[0]
martiran@107	109 dir_cell = self.field[head.x + applied_dir[0], head.y + applied_dir[1]]
Alex@90	110 if dir_cell.type == 'empty':
Alex@90	111 snake.cells.insert(0,dir_cell)
Alex@90	112 del snake.cells[-1]
Alex@90	113 pass
Alex@90	114 elif (dir_cell.type == 'tail' and dir_cell.snake != snake):
Alex@90	115 snake.cells.insert(0,dir_cell)
Alex@90	116 del dir_cell.snake.cells[-1]
Alex@90	117 pass
Alex@90	118
martiran@6	119 def create_snake(self, snake_number):
martiran@46	120 cells_id = []
martiran@113	121 f_h = self.field.h
martiran@113	122 f_w = self.field.w
martiran@111	123 for y in range(self.start_snake_length):
martiran@114	124 cells_id.append(((f_w-1)/2, y+1))
martiran@46	125 for rot_num in range(snake_number - 1):
Alex@62	126 for i, cell in enumerate(cells_id):
martiran@113	127 cells_id[i] = (cell[1],min(f_h, f_w)-cell[0])
martiran@46	128 cells = []
martiran@46	129 for cell in cells_id:
Alex@60	130 cells.append(self.field[cell])
martiran@46	131 color_dic = {
martiran@46	132 1:'blue',
martiran@46	133 2:'green',
martiran@46	134 3:'yellow',
martiran@46	135 4:'red',}
martiran@46	136 self.snakes[snake_number-1] = snake.Snake(cells, color_dic[snake_number])
Alex@77	137 return self.snakes[snake_number-1]
martiran@6	138 def refill(self):
martiran@113	139 f_w = self.field.w
martiran@113	140 f_h = self.field.h
martiran@113	141 for x in range(1,f_w-1):
martiran@113	142 for y in range(1,f_h-1):
martiran@12	143 self.field[x, y].type = 'empty'
martiran@31	144 self.field[x, y].snake = None
martiran@12	145 pass
martiran@12	146 for snake in self.snakes:
martiran@12	147 if snake == None:
martiran@12	148 pass
martiran@12	149 else:
martiran@31	150 snake.fill()
martiran@12	151 pass
martiran@14	152 return
martiran@9	153 def redraw(self):
martiran@117	154 self.canvas.delete("all")
martiran@113	155 w = self.canvas.winfo_width()
martiran@113	156 h = self.canvas.winfo_height()
martiran@113	157 cw = w/float(self.field.w)
martiran@113	158 ch = h/float(self.field.h)
martiran@113	159 c = min(cw, ch)
martiran@113	160 field_geometry = (self.field.wc,self.field.hc)
martiran@113	161 offset = ((w - field_geometry[0])/2.0, (h - field_geometry[1])/2.0)
martiran@32	162 for cell_coord in self.field:
martiran@113	163 self.field[cell_coord].redraw(offset, c)
martiran@15	164 return
martiran@6	165 def legal_moves(self, snake):
martiran@6	166 snake.legal_dir = []
martiran@108	167 head = snake.cells[0]
martiran@6	168 for direction in directions:
martiran@108	169 dir_cell = self.field[head.x + direction[0], head.y + direction[1]]
martiran@12	170 if (dir_cell.type == 'empty' or (dir_cell.type == 'tail' and dir_cell.snake != snake)):
martiran@6	171 snake.legal_dir.append(direction)
Alex@90	172 rnd.shuffle(snake.legal_dir)
martiran@6	173 return
martiran@6	174