@/pkg/helper-geometry

几何算法辅助

参考：

| lib | npm | git | 说明 | | --- | --- | --- | --- | | @turf/turf | npm | git | A modular geospatial engine written in JavaScript | | @mathigon/euclid | npm | git | A Typescript library for 2D geometry | | 2d-geometry | npm | git | A fork of flatten-js focused on performance, ergonomics and Typescript | | flatten-js | npm | git | A Javascript library for 2d geometry | | @markroland/path-helper | npm | git | A variety of methods to assist with performing operations on multi-point paths (polylines) |

各模块说明

src/helper 下各模块作用及依赖关系，需避免循环依赖

| 模块 | 作用 | 依赖 | | --- | --- | --- | | measurement | 长度、面积、中心、边缘等 | - | | comparison | 比较、是否等效 | measurement | | mutation | 修改传入数据 | comparison | | relation | 投影、相交、平行、共线等关系 | measurement、comparison |