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Game of Life (Python + Pygame)
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# coding: utf-8 | |
import pygame | |
import random | |
rr = random.randrange | |
SIZE = 800, 600 | |
cellsize = 20 | |
try: | |
range = xrange | |
except NameError: | |
pass | |
def init(): | |
global SCREEN | |
SCREEN = pygame.display.set_mode((SIZE)) | |
class Grid(object): | |
def __init__(self): | |
self.width = SIZE[0] / cellsize | |
self.height = SIZE[1] / cellsize | |
self.grid = self.makegrid() | |
self.color = (255, 200, 200) | |
def makegrid(self): | |
return [ [0, ] * self.height for y in range(self.width) ] | |
def populate(self, n): | |
for i in range(n): | |
x, y = rr(0, self.width), rr(0, self.height) | |
self[x, y] = True | |
def __getitem__(self, pos): | |
if pos[0] < 0 or pos[1] < 0: | |
return 0 | |
try: | |
return self.grid[pos[0]][pos[1]] | |
except IndexError: | |
return 0 | |
def __setitem__(self, pos, value): | |
self.grid[pos[0]][pos[1]] = value | |
def count_neighbours(self, pos): | |
x, y = pos | |
return sum((self[x - 1, y -1], self[x - 1, y], self[x - 1, y + 1], | |
self[x, y - 1], self[x, y + 1], | |
self[x + 1, y -1], self[x + 1, y], self[x + 1, y + 1])) | |
def __iter__(self): | |
for x in range(self.width): | |
for y in range(self.height): | |
yield (x, y), self[x, y] | |
def update(self): | |
new_grid = self.makegrid() | |
for pos, value in self: | |
v = self.count_neighbours(pos) | |
if v == 3 or (v == 2 and value): | |
new_grid[pos[0]] [pos[1]] = 1 | |
self.grid = new_grid | |
def draw(self, surf): | |
for pos, value in self: | |
pygame.draw.rect( | |
surf, self.color if value else (0, 0, 0), | |
(pos[0] * cellsize + 1, pos[1] * cellsize + 1, cellsize - 2, cellsize -2) | |
) | |
class Exit(BaseException): | |
pass | |
def main(): | |
grid = Grid() | |
grid.populate(100) | |
starting = True | |
while True: | |
pygame.event.pump() | |
for event in pygame.event.get(): | |
if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == 0x1b): | |
raise Exit | |
if event.type == pygame.MOUSEBUTTONDOWN or event.type == pygame.MOUSEMOTION and any(event.buttons): | |
x, y = event.pos | |
grid[x // cellsize, y //cellsize] = True | |
if not starting: | |
grid.update() | |
grid.draw(SCREEN) | |
pygame.display.flip() | |
pygame.time.delay(200) | |
starting = False | |
if __name__ == "__main__": | |
try: | |
init() | |
main() | |
except Exit: | |
print("Normal termination") | |
finally: | |
pygame.quit() |
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