add

Author: bingqixuan

README.md

@@ -12,4 +12,5 @@ GIS算法库
 - [proj4js地理坐标转换库](https://github.com/proj4js/proj4js)
 - [基于Kodituwakka, Wijeweera & Chamikara算法的线裁剪](https://github.com/rowanwins/kwc-lineclip)
 - [polygon-offset：多边形缓冲区](https://github.com/w8r/polygon-offset)
-- [Martinez-Rueda多边形裁剪算法，支持联合、相交、差集等](https://github.com/w8r/martinez)
+- [Martinez-Rueda多边形裁剪算法，支持联合、相交、差集等](https://github.com/w8r/martinez)
+- [多边形布尔运算](https://github.com/voidqk/polybooljs)