用于计算测地距的lib，特别适用在3D模型上，比如三角面片上。非常快速。代码非常简单好用，matlab版本的例子给的比较好，请仔细参考。C++版可看文档内部地址下载-Used to calculate the geodesic distance lib, especially for the 3D model, such as the triangular surface-chip. Very fast. The code is very simple and easy to use, matl