cesium turf.js展示两多边形相交区域

1. 安装turf图形辅助插件和turf求相交插件

npm install @turf/helpers  //所有的基础图形
npm install @turf/intersect

//用法
import { polygon } from '@turf/helpers' // 引入需要的图形
import turf_intersect from '@turf/intersect' 
//turf_intersect 即为相交函数本省，不需要再加intersect

或

npm install turf-polygon  //只下载多边形
npm install @turf/intersect

//用法
import turf-polygon from 'turf-polygon' // 引入需要的图形
import turf_intersect from '@turf/intersect' 
//turf_intersect 即为相交函数本省，不需要再加intersect

2. 画出相交图形

let poly1 = polygon([polygonDrawArr[0]])
let poly2 = polygon([polygonDrawArr[1]])
let geojson = turf_intersect(poly1, poly2)

或

let poly1 = turf-polygon([polygonDrawArr[0]])
let poly2 = turf-polygon([polygonDrawArr[1]])
let geojson = turf_intersect(poly1, poly2)

polygon的参数格式如下

[[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]]