存储项目的大部分函数

game_functions.py

@@ -302,3 +302,13 @@ def ship_hit(ai_settings, screen, stats, sb, ship, aliens, bullets, bossalien, b
         pygame.mixer.init()
         sound = pygame.mixer.Sound('sounds/gameover.wav')
         sound.play()
+
+
+def check_aliens_bottom(ai_settings, screen, stats, sb, ship, aliens, bullets):
+    """检查是否有外星人到达了屏幕底端"""
+    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, screen, stats, sb, ship, aliens, bossalien, bullets)
+            break