/// <returns>单位:米</returns>
public static int 测量两点间间距(M经纬度 点1, M经纬度 点2)
{
if (点1.类型 != 点2.类型)
{
点1 = HGPS坐标转换.转原始坐标(点1);
点2 = HGPS坐标转换.转原始坐标(点2);
}
return((int)(GMapProviders.EmptyProvider.Projection.GetDistance(new GMap.NET.PointLatLng(点1.纬度, 点1.经度),
new GMap.NET.PointLatLng(点2.纬度, 点2.经度)) * 1000));
//var latRadians1 = __纬度1 * (Math.PI / 180);
//var latRadians2 = __纬度2 * (Math.PI / 180);
//var latRadians = latRadians1 - latRadians2;
//var lngRadians = __经度1 * (Math.PI / 180) - __经度2 * (Math.PI / 180);
//var f = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(latRadians / 2), 2) + Math.Cos(latRadians1) * Math.Cos(latRadians2) * Math.Pow(Math.Sin(lngRadians / 2), 2)));
//return f * 6378137;
//double dLat1InRad = p1.Lat * (Math.PI / 180);
//double dLong1InRad = p1.Lng * (Math.PI / 180);
//double dLat2InRad = p2.Lat * (Math.PI / 180);
//double dLong2InRad = p2.Lng * (Math.PI / 180);
//double dLongitude = dLong2InRad - dLong1InRad;
//double dLatitude = dLat2InRad - dLat1InRad;
//double a = Math.Pow(Math.Sin(dLatitude / 2), 2) + Math.Cos(dLat1InRad) * Math.Cos(dLat2InRad) * Math.Pow(Math.Sin(dLongitude / 2), 2);
//double c = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a));
//double dDistance = (Axis / 1000.0) * c;
//return dDistance;
}
/// <param name="半径">单位:米</param>
public static bool 判断点在圆形内(M经纬度 点, M经纬度 圆心, int 半径)
{
if (点.类型 != 圆心.类型)
{
点 = HGPS坐标转换.转原始坐标(点);
圆心 = HGPS坐标转换.转原始坐标(圆心);
}
var __间距 = 测量两点间间距(点, 圆心);
return(__间距 <= 半径);
}
/// <param name="半径">单位:米</param>
public static bool 判断圆重叠(M经纬度 圆心1, int 半径1, M经纬度 圆心2, int 半径2)
{
if (圆心1.类型 != 圆心2.类型)
{
圆心1 = HGPS坐标转换.转原始坐标(圆心1);
圆心2 = HGPS坐标转换.转原始坐标(圆心2);
}
var __间距 = 测量两点间间距(圆心1, 圆心2);
return(__间距 <= (半径1 + 半径2));
}
