中文说明： 给定三维散乱点，以及法矢量等信息，通过最小二乘曲线拟合，求取，三维散乱点云的主曲率，高斯曲率，平均曲率，里面有详细的注释，和数据，可以运行
English Description：
A given three dimensional scattered, and information such as an algorithm, by least squares curve fitting, to gain, dimensional principal curvature of scattered points cloud, Gaussian curvature, mean curvature, there are detailed notes and data, you can run