存储项目的大部分函数

game_functions.py

@@ -59,3 +59,32 @@ def check_events(ai_settings, screen, stats, sb, play_button, ship, aliens, bull
             mouse_x, mouse_y = pygame.mouse.get_pos()
 
             check_play_button(ai_settings, screen, stats, sb, play_button, ship, aliens, bullets, mouse_x, mouse_y)
+def update_screen(ai_settings, screen, stats, sb, ship, aliens, bossalien, bullets, bossbullet, play_button):
+    screen.fill(ai_settings.bg_color)
+    ship.blitme()
+
+    # 在飞船和外星人后面重绘所有子弹
+    for bullet in bullets.sprites():
+        bullet.draw_bullet()
+
+    # 增加：如果进入BOSS关，则绘制BOSS外星人，其他关卡绘制普通外星人
+    if stats.level == stats.bosslevel:
+        bossalien.blitme()
+        bossalien.draw_health_bar(screen)
+
+        bossbullet.draw_bullet()
+        bossalien_fire_bullet(ai_settings, screen, bossalien, bossbullet, ship)
+
+        check_bossbullet_bottom(ai_settings, screen, stats, sb, ship, aliens, bossalien, bullets, bossbullet)
+    else:
+        aliens.draw(screen)
+
+    # 显示得分
+    sb.show_score()
+
+    # 如果游戏处于非活动状态，就绘制Play按钮
+    if not stats.game_active:
+        play_button.draw_button()
+
+    # 让最近绘制的屏幕可见
+    pygame.display.flip()