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Python外星人入侵游戏编程完整版！孩子开心坏了( 三 )

<= 0: # 子弹出界 删除bullets.remove(bullet) check_bullet_alien_collisions(ai_settings,screen,stats,sb,ship,aliens,bullets)def check_bullet_alien_collisions(ai_settings,screen,stats,sb,ship,aliens,bullets):"""响应外星人和子弹的碰撞""" #删除发生碰撞的子弹和外星人 collisions = pygame.sprite.groupcollide(bullets,aliens,True,True)if collisions: for aliens in collisions.values():stats.score += ai_settings.alien_points * len(aliens)sb.prep_score() check_high_score(stats,sb)if len(aliens)==0: #删除现有的子弹并新建一群外星人,加快游戏进度节奏 bullets.empty() ai_settings.increase_speed()#提高等级 stats.level += 1 sb.prep_level()create_fleet(ai_settings,screen,ship,aliens)def update_ship(ship): ship.update()def fire_bullet(ai_settings,screen,ship,bullets): # 创建一个子弹对象 加入到子弹组 if len(bullets) < ai_settings.bullets_allowed: # 子弹少于允许值时再生成 new_bullet = Bullet(ai_settings, screen, ship) bullets.add(new_bullet)def get_number_aliens_x(ai_settings,alien_width): """计算每行可容纳多少个外星人""" available_space_x = ai_settings.screen_width - 2 * alien_width number_aliens_x = int(available_space_x / (2 * alien_width)) return number_aliens_xdef get_number_rows(ai_settings,ship_height,alien_height): """计算屏幕可容纳多少行外星人""" available_space_y = (ai_settings.screen_height - (3 * alien_height) - ship_height) number_rows = int(available_space_y / (2 * alien_height)) return number_rows def create_aliens(ai_settings,screen,aliens,alien_number,row_number): """创建一个外星人并将其放在当期行""" alien = Alien(ai_settings,screen) alien_width = alien.rect.width alien.x = alien_width + 2 * alien_width * alien_numberalien.rect.x = alien.x alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number aliens.add(alien) def create_fleet(ai_settings,screen,ship,aliens): """创建外星人群""" #创建一个外星人 ， 并计算一行可以容纳多少个外星人 #外星人间距为外星人宽度 alien = Alien(ai_settings,screen) number_aliens_x = get_number_aliens_x(ai_settings,alien.rect.width) number_rows = get_number_rows(ai_settings,ship.rect.height,alien.rect.height)#创建第一行外星人 for row_number in range(number_rows): for alien_number in range(number_aliens_x):#创建一个外星人并将其加入当前行create_aliens(ai_settings,screen,aliens,alien_number,row_number) def check_fleet_edges(ai_settings,aliens): """有外星人到达边缘时采取相应措施""" for alien in aliens.sprites(): if alien.check_edges():change_fleet_direction(ai_settings,aliens)break def change_fleet_direction(ai_settings,aliens): """将整群外星人下移 ， 并改变他们的运动方向""" for alien in aliens.sprites(): alien.rect.y += ai_settings.fleet_drop_speed ai_settings.fleet_direction *= -1def ship_hit(ai_settings,stats,screen,sb,ship,aliens,bullets): """响应被外星人撞到的飞船""" if stats.ships_left > 0: #将ship_left减1 stats.ships_left -= 1#更新记分牌 sb.prep_ships()#清空外星人列表和子弹列表 aliens.empty() bullets.empty() #创建一群新的外星人 ， 并将飞船放到屏幕低端中央 create_fleet(ai_settings,screen,ship,aliens) ship.center_ship() #暂停 sleep(0.5) else: stats.game_active = False pygame.mouse.set_visible(True)def check_aliens_bottom(ai_settings,stats,screen,sb,ship,aliens,bullets): """检查是否有外星人到达屏幕低端""" screen_rect = screen.get_rect() for alien in aliens.sprites(): if alien.rect.bottom >= screen_rect.bottom:#像飞船被撞到一样进行处理ship_hit(ai_settings,stats,screen,sb,ship,aliens,bullets)breakdef update_aliens(ai_settings,stats,screen,sb,ship,aliens,bullets): """更新外星人群中所有外星人的位置""" check_fleet_edges(ai_settings,aliens) aliens.update() #检测外星人和飞船之间的碰撞 if pygame.sprite.spritecollideany(ship,aliens): ship_hit(ai_settings,stats,screen,sb,ship,aliens,bullets) #检查是否有外星人到达屏幕低端 check_aliens_bottom(ai_settings,stats,screen,sb,ship,aliens,bullets)def check_high_score(stats,sb): """检查是否诞生了新的最高纪录""" if stats.score > stats.high_score: stats.high_score = stats.score sb.prep_high_score()


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