python flappy bird小游戏分步实现流程

'''显示开始界面'''
def startGame(screen, sounds, bird_images, other_images, backgroud_image, cfg):
  base_pos = [0, cfg.SCREENHEIGHT*0.79]
  base_diff_bg = other_images['base'].get_width() - backgroud_image.get_width()
  msg_pos = [(cfg.SCREENWIDTH-other_images['message'].get_width())/2, cfg.SCREENHEIGHT*0.12]
  bird_idx = 0
  bird_idx_change_count = 0
  bird_idx_cycle = itertools.cycle([0, 1, 2, 1])
  bird_pos = [cfg.SCREENWIDTH*0.2, (cfg.SCREENHEIGHT-list(bird_images.values())[0].get_height())/2]
  bird_y_shift_count = 0
  bird_y_shift_max = 9
  shift = 1
  clock = pygame.time.Clock()
  while True:
    for event in pygame.event.get():
      if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE):
        pygame.quit()
        sys.exit()
      elif event.type == pygame.KEYDOWN:
        if event.key == pygame.K_SPACE or event.key == pygame.K_UP:
          return {'bird_pos': bird_pos, 'base_pos': base_pos, 'bird_idx': bird_idx}
    sounds['wing'].play()
    bird_idx_change_count += 1
    if bird_idx_change_count % 5 == 0:
      bird_idx = next(bird_idx_cycle)
      bird_idx_change_count = 0
    base_pos[0] = -((-base_pos[0] + 4) % base_diff_bg)
    bird_y_shift_count += 1
    if bird_y_shift_count == bird_y_shift_max:
      bird_y_shift_max = 16
      shift = -1 * shift
      bird_y_shift_count = 0
    bird_pos[-1] = bird_pos[-1] + shift
    screen.blit(backgroud_image, (0, 0))
    screen.blit(list(bird_images.values())[bird_idx], bird_pos)
    screen.blit(other_images['message'], msg_pos)
    screen.blit(other_images['base'], base_pos)
    pygame.display.update()
    clock.tick(cfg.FPS)

pygame.sprite.collide_mask

# 进入主游戏
score = 0
bird_pos, base_pos, bird_idx = list(game_start_info.values())
base_diff_bg = other_images['base'].get_width() - backgroud_image.get_width()
clock = pygame.time.Clock()
# --管道类
pipe_sprites = pygame.sprite.Group()
for i in range(2):
  pipe_pos = Pipe.randomPipe(cfg, pipe_images.get('top'))
  pipe_sprites.add(Pipe(image=pipe_images.get('top'), position=(cfg.SCREENWIDTH+200+i*cfg.SCREENWIDTH/2, pipe_pos.get('top')[-1])))
  pipe_sprites.add(Pipe(image=pipe_images.get('bottom'), position=(cfg.SCREENWIDTH+200+i*cfg.SCREENWIDTH/2, pipe_pos.get('bottom')[-1])))
# --bird类
bird = Bird(images=bird_images, idx=bird_idx, position=bird_pos)
# --是否增加pipe
is_add_pipe = True
# --游戏是否进行中
is_game_running = True
while is_game_running:
  for event in pygame.event.get():
    if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE):
      pygame.quit()
      sys.exit()
    elif event.type == pygame.KEYDOWN:
      if event.key == pygame.K_SPACE or event.key == pygame.K_UP:
        bird.setFlapped()
        sounds['wing'].play()
  # --碰撞检测
  for pipe in pipe_sprites:
    if pygame.sprite.collide_mask(bird, pipe):
      sounds['hit'].play()
      is_game_running = False
  # --更新小鸟
  boundary_values = [0, base_pos[-1]]
  is_dead = bird.update(boundary_values, float(clock.tick(cfg.FPS))/1000.)
  if is_dead:
    sounds['hit'].play()
    is_game_running = False
  # --移动base实现小鸟往前飞的效果
  base_pos[0] = -((-base_pos[0] + 4) % base_diff_bg)
  # --移动pipe实现小鸟往前飞的效果
  flag = False
  for pipe in pipe_sprites:
    pipe.rect.left -= 4
    if pipe.rect.centerx < bird.rect.centerx and not pipe.used_for_score:
      pipe.used_for_score = True
      score += 0.5
      if '.5' in str(score):
        sounds['point'].play()
    if pipe.rect.left < 5 and pipe.rect.left > 0 and is_add_pipe:
      pipe_pos = Pipe.randomPipe(cfg, pipe_images.get('top'))
      pipe_sprites.add(Pipe(image=pipe_images.get('top'), position=pipe_pos.get('top')))
      pipe_sprites.add(Pipe(image=pipe_images.get('bottom'), position=pipe_pos.get('bottom')))
      is_add_pipe = False
    elif pipe.rect.right < 0:
      pipe_sprites.remove(pipe)
      flag = True
  if flag: is_add_pipe = True
  # --绑定必要的元素在屏幕上
  screen.blit(backgroud_image, (0, 0))
  pipe_sprites.draw(screen)
  screen.blit(other_images['base'], base_pos)
  showScore(screen, score, number_images)
  bird.draw(screen)
  pygame.display.update()
  clock.tick(cfg.FPS)

'''游戏结束界面'''
def endGame(screen, sounds, showScore, score, number_images, bird, pipe_sprites, backgroud_image, other_images, base_pos, cfg):
  sounds['die'].play()
  clock = pygame.time.Clock()
  while True:
    for event in pygame.event.get():
      if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE):
        pygame.quit()
        sys.exit()
      elif event.type == pygame.KEYDOWN:
        if event.key == pygame.K_SPACE or event.key == pygame.K_UP:
          return
    boundary_values = [0, base_pos[-1]]
    bird.update(boundary_values, float(clock.tick(cfg.FPS))/1000.)
    screen.blit(backgroud_image, (0, 0))
    pipe_sprites.draw(screen)
    screen.blit(other_images['base'], base_pos)
    showScore(screen, score, number_images)
    bird.draw(screen)
    pygame.display.update()
    clock.tick(cfg.FPS)