计算几何

https://www.xht37.com/%e8%ae%a1%e7%ae%97%e5%87%a0%e4%bd%95-%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0/

https://www.cnblogs.com/nietzsche-oier/p/8798540.html

https://www.wjyyy.top/3412.html#i-43

https://blog.csdn.net/qq_40861916/article/details/83541403

https://www.cnblogs.com/xzyxzy/p/10241872.html

https://www.cnblogs.com/xzyxzy/p/10033130.html

来源：https://www.cnblogs.com/Hikigaya/p/11913580.html