Calculate direction, bearing, radians and distance between two location points

bearing

static double DegreeBearing(
    double lat1, double lon1, 
    double lat2, double lon2)
{   
    const double R = 6371; //earth’s radius (mean radius = 6,371km)
    var dLon = ToRad(lon2-lon1);
    var dPhi = Math.Log(
        Math.Tan(ToRad(lat2)/2+Math.PI/4)/Math.Tan(ToRad(lat1)/2+Math.PI/4));
    if (Math.Abs(dLon) > Math.PI) 
        dLon = dLon > 0 ? -(2*Math.PI-dLon) : (2*Math.PI+dLon);
    return ToBearing(Math.Atan2(dLon, dPhi));
}

public static double ToRad(double degrees)
{
    return degrees * (Math.PI / 180);
}

public static double ToDegrees(double radians)
{
    return radians * 180 / Math.PI;
}

public static double ToBearing(double radians) 
{  
    // convert radians to degrees (as bearing: 0...360)
    return (ToDegrees(radians) +360) % 360;
}

// verify against the website example
DegreeBearing(50.36389,-4.15694,42.35111,-71.04083);

distance

// Find and return the distance between two points in meters
	public double GetDistance(double lat1, double long1, double lat2, double long2) {

		double _eQuatorialEarthRadius = 6378.1370D;
		double _d2r = (Math.PI / 180D);

		double dlong = (long2 - long1) * _d2r;
		double dlat = (lat2 - lat1) * _d2r;
		double a = Math.Pow(Math.Sin(dlat / 2D), 2D) + Math.Cos(lat1 * _d2r) * Math.Cos(lat2 * _d2r) * Math.Pow(Math.Sin(dlong / 2D), 2D);
		double c = 2D * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1D - a));
		double d = _eQuatorialEarthRadius * c;
		
		return d * 1000;
	}

flip mirror image

// flip the mirrored webcam image
Vector3 theScale = transform.localScale;
theScale.x *= -1;
transform.localScale = theScale;