Hello,
I've been attempting to recreate Conway's Game of Life using Python and Pygame. It's sort of working, but I think there's an issue with the logic of checking whether or not a cell lives or dies. I have it seeded to a common start pattern, but the cells only change once and then they stay as is.
I followed the 4 "rules" of the game located here.
Would appreciate anyone more familiar with Python and/or The Game of Life to have a look at this and provide any suggestions.
Thanks!
__author__ = 'me myself and I'
import pygame, sys
from pygame.locals import *
pygame.init()
FPS = 30
WIDTH = 120
HEIGHT = 120
CELL_WIDTH = 5
CELL_HEIGHT = 5
WHITE = (255, 255, 255)
BLACK = (0,0,0)
fpsClock = pygame.time.Clock()
DISPLAYSURF = pygame.display.set_mode((600, 600), 0, 32)
board = []
for r in range(0, WIDTH-1):
board.append([])
for c in range(0, HEIGHT-1):
board[r].append('o')
def debug_board():
for row in board:
print row
print "\n"
def init_board(board):
board[55][55] = 'x'
board[56][55] = 'x'
board[57][55] = 'x'
board[56][53] = 'x'
board[51][55] = 'x'
board[51][54] = 'x'
board[50][54] = 'x'
def draw_board(board):
for y, row in enumerate(board):
for x, col in enumerate(board[y]):
if board[x][y] == 'x':
pygame.draw.rect(DISPLAYSURF, BLACK, ((CELL_WIDTH*x),(CELL_HEIGHT*y),CELL_WIDTH,CELL_HEIGHT))
#don't worry about edges for now
def get_live_neighbors(x, y, board):
try:
if x >= 1 and y >= 1 and x < (WIDTH - 2) and y < (HEIGHT - 2):
live = 0
if board[x-1][y] == 'x':
live += 1
if board[x+1][y] == 'x':
live += 1
if board[x][y+1] == 'x':
live += 1
if board[x][y-1] == 'x':
live += 1
if board[x+1][y+1] == 'x':
live += 1
if board[x-1][y-1] == 'x':
live += 1
if board[x+1][y-1] == 'x':
live += 1
if board[x-1][y+1] == 'x':
live += 1
return live
except IndexError:
print x
print y
def check_neighbors(board):
for y, row in enumerate(board):
for x, col in enumerate(board[y]):
#live cell fewer than 2 neighbors dies
if board[x][y] == 'x' and get_live_neighbors(x,y,board) < 2:
board[x][y] = 'o'
continue
#live cell 2 or 3 live neigbors lives on
elif board[x][y] == 'x' and (get_live_neighbors(x,y,board) == 2 or get_live_neighbors(x,y,board) == 3):
board[x][y] = 'x'
continue
#live cell with more than three live neighbors dies
elif board[x][y] == 'x' and get_live_neighbors(x,y,board) > 3:
board[x][y] = 'o'
continue
#dead cell with exactly 3 live neighbors becomes live
elif board[x][y] == 'o' and get_live_neighbors(x,y,board) == 3:
board[x][y] = 'x'
continue
pygame.display.set_caption('Hello World!')
DISPLAYSURF.fill(WHITE)
init_board(board)
while True: # main game loop
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
pygame.quit()
sys.exit()
draw_board(board)
check_neighbors(board)
pygame.time.delay(1000)
pygame.display.update()
fpsClock.tick(FPS)
