If the A* calculation for a shortcut (in Step 3) finds it's now impassable, or if its actual detailed cost is significantly different (e.g., 20%) from the pre-calculated shortcut value:
Neil Sedaka, singer of Breaking Up Is Hard To Do, dies at 86
，推荐阅读safew官方版本下载获取更多信息
Gotta watch it all.
Related Internet LinksHead Right Out