Example_4.py

 import sys
import cfg
import pygame
from modules import *


'''游戏界面'''
def GamingInterface(num_player, screen):
  # 初始化
  pygame.mixer.music.load(cfg.SOUNDPATHS['Cool Space Music'])
  pygame.mixer.music.set_volume(0.4)
  pygame.mixer.music.play(-1)
  explosion_sound = pygame.mixer.Sound(cfg.SOUNDPATHS['boom'])
  fire_sound = pygame.mixer.Sound(cfg.SOUNDPATHS['shot'])
  font = pygame.font.Font(cfg.FONTPATH, 20)
  # 游戏背景图
  bg_imgs = [cfg.IMAGEPATHS['bg_big'], cfg.IMAGEPATHS['seamless_space'], cfg.IMAGEPATHS['space3']]
  bg_move_dis = 0
  bg_1 = pygame.image.load(bg_imgs[0]).convert()
  bg_2 = pygame.image.load(bg_imgs[1]).convert()
  bg_3 = pygame.image.load(bg_imgs[2]).convert()
  # 玩家, 子弹和小行星精灵组
  player_group = pygame.sprite.Group()
  bullet_group = pygame.sprite.Group()
  asteroid_group = pygame.sprite.Group()
  # 产生小行星的时间间隔
  asteroid_ticks = 90
  for i in range(num_player):
      player_group.add(Ship(i+1, cfg))
  clock = pygame.time.Clock()
  # 分数
  score_1, score_2 = 0, 0
  # 游戏主循环
  while True:
      for event in pygame.event.get():
          if event.type == pygame.QUIT:
              pygame.quit()
              sys.exit()
      # --玩家一: ↑↓←→控制, j射击; 玩家二: wsad控制, 空格射击
      pressed_keys = pygame.key.get_pressed()
      for idx, player in enumerate(player_group):
          direction = None
          if idx == 0:
              if pressed_keys[pygame.K_UP]:
                  direction = 'up'
              elif pressed_keys[pygame.K_DOWN]:
                  direction = 'down'
              elif pressed_keys[pygame.K_LEFT]:
                  direction = 'left'
              elif pressed_keys[pygame.K_RIGHT]:
                  direction = 'right'
              if direction:
                  player.move(direction)
              if pressed_keys[pygame.K_j]:
                  if player.cooling_time == 0:
                      fire_sound.play()
                      bullet_group.add(player.shot())
                      player.cooling_time = 20
          elif idx == 1:
              if pressed_keys[pygame.K_w]:
                  direction = 'up'
              elif pressed_keys[pygame.K_s]:
                  direction = 'down'
              elif pressed_keys[pygame.K_a]:
                  direction = 'left'
              elif pressed_keys[pygame.K_d]:
                  direction = 'right'
              if direction:
                  player.move(direction)
              if pressed_keys[pygame.K_SPACE]:
                  if player.cooling_time == 0:
                      fire_sound.play()
                      bullet_group.add(player.shot())
                      player.cooling_time = 20
          if player.cooling_time > 0:
              player.cooling_time -= 1
      if (score_1 + score_2) < 500:
          background = bg_1
      elif (score_1 + score_2) < 1500:
          background = bg_2
      else:
          background = bg_3
      # --向下移动背景图实现飞船向上移动的效果
      screen.blit(background, (0, -background.get_rect().height + bg_move_dis))
      screen.blit(background, (0, bg_move_dis))
      bg_move_dis = (bg_move_dis + 2) % background.get_rect().height
      # --生成小行星
      if asteroid_ticks == 0:
          asteroid_ticks = 90
          asteroid_group.add(Asteroid(cfg))
      else:
          asteroid_ticks -= 1
      # --画飞船
      for player in player_group:
          if pygame.sprite.spritecollide(player, asteroid_group, True, None):
              player.explode_step = 1
              explosion_sound.play()
          elif player.explode_step > 0:
              if player.explode_step > 3:
                  player_group.remove(player)
                  if len(player_group) == 0:
                      return
              else:
                  player.explode(screen)
          else:
              player.draw(screen)
      # --画子弹
      for bullet in bullet_group:
          bullet.move()
          if pygame.sprite.spritecollide(bullet, asteroid_group, True, None):
              bullet_group.remove(bullet)
              if bullet.player_idx == 1:
                  score_1 += 1
              else:
                  score_2 += 1
          else:
              bullet.draw(screen)
      # --画小行星
      for asteroid in asteroid_group:
          asteroid.move()
          asteroid.rotate()
          asteroid.draw(screen)
      # --显示分数
      score_1_text = '玩家一得分: %s' % score_1
      score_2_text = '玩家二得分: %s' % score_2
      text_1 = font.render(score_1_text, True, (0, 0, 255))
      text_2 = font.render(score_2_text, True, (255, 0, 0))
      screen.blit(text_1, (2, 5))
      screen.blit(text_2, (2, 35))
      # --屏幕刷新
      pygame.display.update()
      clock.tick(60)


'''主函数'''
def main():
  pygame.init()
  pygame.font.init()
  pygame.mixer.init()
  screen = pygame.display.set_mode(cfg.SCREENSIZE)
  pygame.display.set_caption('飞机大战 —— 九歌')
  num_player = StartInterface(screen, cfg)
  if num_player == 1:
      while True:
          GamingInterface(num_player=1, screen=screen)
          EndInterface(screen, cfg)
  else:
      while True:
          GamingInterface(num_player=2, screen=screen)
          EndInterface(screen, cfg)


'''run'''
if __name__ == '__main__':
  main()