本文介绍两个类和一个实用功能，计算几何集。 C3Point是一个三维的对手，口岸系统和CPolygon封装了C3Point的设置和提供一般多边形处理功能。轻度的类已经优化了速度。最初写的类中使用的discretising二维表面成单元网络和计算所造成的元素的属性。必须小心使用，如曲率和面积职能的部分职能，以确保由函数返回的结果与您的需求和定义是一致的。

-This article describes the two classes and a practical function, computational geometry set. C3Point is a three-dimensional opponent, port systems and CPolygon encapsulate C3Point settings and provides general polygon handling functions. The class has been optimized for light speed. The class was originally written using two-dimensional surface into a unit discretising networking and computing elements caused by the property. Must be used with care, such as curvature and size of the functions of some of the functions to ensure the results returned by the function of your needs and is consistent with the definition.