存储项目的大部分函数

game_functions.py

@@ -26,4 +26,23 @@ def fire_bullet(ai_settings, screen, ship, bullets):
         # 增加：添加发射音效
         pygame.mixer.init()
         sound = pygame.mixer.Sound('sounds/firebullets.wav')
-        sound.play()
+        sound.play()
+def bossalien_fire_bullet(ai_settings, screen, bossalien, bossbullet, ship):
+    """增加：BOSS发射子弹"""
+    # 创建一颗子弹
+    bossbullet = BossBullet(ai_settings, screen, bossalien)
+def check_bossbullet_bottom(ai_settings, screen, stats, sb, ship, aliens, bossalien, bullets, bossbullet):
+    """当子弹飞出屏幕底部时，重置BOSS子弹位置"""
+    screen_rect = screen.get_rect()
+    if bossbullet.y >= screen_rect.bottom:
+        bossbullet.reset_position(bossalien)
+def check_keyup_events(event, ship):
+    """响应松开"""
+    if event.key == pygame.K_RIGHT:
+        ship.moving_right = False
+    elif event.key == pygame.K_LEFT:
+        ship.moving_left = False
+    elif event.key == pygame.K_UP:
+        ship.moving_up = False
+    elif event.key == pygame.K_DOWN:
+        ship.moving_down = False