/// <summary>
/// 球面坐标转换到笛卡尔右手空间直角坐标系
/// </summary>
/// <param name="sphere"></param>
/// <returns></returns>
public static XYZ SphereToXyz(SphereCoord sphere)
{
double r = sphere.Radius;
double lat = sphere.Lat;
double lon = sphere.Lon;
return(SphereToXyz(lon, lat, r, sphere.Unit));
}
/// <summary>
/// 笛卡尔右手空间直角坐标系 转换到 球面坐标
/// </summary>
/// <param name="xyz"></param>
/// <param name="unit"></param>
/// <returns></returns>
public static SphereCoord XyzToSphere(XYZ xyz, AngleUnit unit = AngleUnit.Degree)
{
double x = xyz.X;
double y = xyz.Y;
double z = xyz.Z;
SphereCoord sphere = XyzToSphere(x, y, z, unit);
return(sphere);
}
/// <summary>
/// XYZ to Sphere Coordinate
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="z"></param>
/// <returns></returns>
public static SphereCoord XyzToSphere(double x, double y, double z, AngleUnit unit = AngleUnit.Degree)
{
double radius = Math.Sqrt(x * x + y * y + z * z);
double lon = Math.Atan2(y, x);
double lat = Math.Atan2(z, Math.Sqrt(x * x + y * y));
lon = AngularConvert.RadTo(lon, unit);
lat = AngularConvert.RadTo(lat, unit);
SphereCoord sphere = new SphereCoord(lon, lat, radius);
return(sphere);
}