存储项目的大部分函数

game_functions.py

@@ -16,4 +16,14 @@ def check_keydown_events(event, ai_settings, screen, ship, bullets):
     elif event.key == pygame.K_SPACE:
         fire_bullet(ai_settings, screen, ship, bullets)
     elif event.key == pygame.K_q:
-        sys.exit()
+        sys.exit()
+def fire_bullet(ai_settings, screen, ship, bullets):
+    """如果还没有到达限制，就发射一颗子弹"""
+    # 创建一颗子弹，并将其加入到编组bullets中
+    if len(bullets) < ai_settings.bullets_allowed:
+        new_bullet = Bullet(ai_settings, screen, ship)
+        bullets.add(new_bullet)
+        # 增加：添加发射音效
+        pygame.mixer.init()
+        sound = pygame.mixer.Sound('sounds/firebullets.wav')
+        sound.play()