凸包计算，多边形切割，基本几何公式，球面面积，网格计算，等计算函数。含使用时的注意事项。-Convex hull calculation, polygon cut, basic geometric formulas, spherical area, grid computing, and other computing functions. with cautions .

ACM及各类基本算法模板，包括数据结构，计算几何，字符串，图论，数学，高精度等许多常用模板-ACM basic algorithm and various templates, including data structures, computational geometry, string, graph theory, mathematics, high-precision, and many other commonly used templates

各种几何算法，很全，很实用!(点的基本运算，线段及直线的基本运算，多边形常用算法模块，圆的基本运算等)-A variety of geometric algorithms, very full, very practical! (Point of basic operations, basic computing and straight line segments, polygons, commonly used algorithm module, a round of basic opera