本项目代码移植自开源项目geometry3Sharp。原项目是用C#语言写就的几何计算库。
本项目所有代码移植工作仅与兴趣有关，并以此学习使用git和github以及学习C++的新特性。不保证代码的完整性和平台可移植性。
This project codes are ported from open-source project geometry3Sharp, which is a C# library for geometric computing.
All work is just for fun. And I will improve my skills to use git and github and learn new features of C++ introduced by C++11,14 and 17 through this project. So there is no guarantee of code integrity and platform portability.