oriloc

本库用于定位

oriloc主要包括四个函数：
1、distance 用于求两点距离；
2、tria 用于三角定位；
3、cir 用于求两个圆交点；
4、angle 用于两点角度定位；

This package is used for location

oriloc includes four functions:

1. "distance" is used to get the distance between two points;
   
2. "tria" is used for triangulation;
   
3. "cir" is used to get the intersection of two circles;
   
4. "angle" is used for two-point angle positioning.