[JavaScript]代码
/**
* 计算一个点是否在多边形里
* @param {Object} pt 标注点
* @param {Object} poly 多边形数组
*/
function isInsidePolygon(pt, poly){
for (var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
((poly[i].lat <= pt.lat && pt.lat < poly[j].lat) || (poly[j].lat <= pt.lat && pt.lat < poly[i].lat)) &&
(pt.lng < (poly[j].lng - poly[i].lng) * (pt.lat - poly[i].lat) / (poly[j].lat - poly[i].lat) + poly[i].lng) &&
(c = !c);
return c;
}
原创文章，作者：奋斗，如若转载，请注明出处：https://blog.ytso.com/tech/pnotes/8760.html