private static bool AeroWithinTol(Aero aero, double lat, double lon, double latTol, double lonTol)
{
double maxLat = lat + latTol, minLat = lat - latTol;
double maxLon = lon + lonTol, minLon = lon - lonTol;
double aLat = aero.Latitude, aLon = aero.Longitude;
if (aLat > maxLat)
{
return(false);
}
else if (aLat < minLat)
{
return(false);
}
else if (aLon > maxLon)
{
return(false);
}
else if (aLon < minLon)
{
return(false);
}
else
{
return(true);
}
}
private static void DisplayNearest(Aero nearest, double lat, double lon)
{
Console.WriteLine("From:");
Console.WriteLine("Latitude: {0} degrees", lat);
Console.WriteLine("Longitude: {0} degrees", lon);
Console.WriteLine("The closest aeroplane is:");
Console.WriteLine("Latitude: {0} degrees", nearest.Latitude);
Console.WriteLine("Longitude: {0} degrees", nearest.Longitude);
Console.WriteLine("Relative distance: {0} km", nearest.RelativeGeoDistance);
Console.WriteLine("Geometric Altitude: {0} m", nearest.GeoAltitude);
Console.WriteLine("Callsign: {0}", nearest.Callsign);
Console.WriteLine("ICAO24 ID: {0}", nearest.ICAO24);
Console.WriteLine("Country of origin: {0}", nearest.OriginCountry);
}
private static Aero GetNearest(List <Aero> aeroList, double lat, double lon)
{
Aero aero;
Aero nearest = null;
for (var i = 0; i < aeroList.Count; i++)
{
aero = aeroList[i];
if (i == 0)
{
aero.RelativeGeoDistance = AeroTracker.GeoDistance(lat, lon, aero.Latitude, aero.Longitude);
nearest = aero;
continue;
}
if (nearest == null)
{
throw new NullReferenceException("Could not find nearest during loop");
}
double latTol = Math.Max(nearest.Latitude, lat) - Math.Min(nearest.Latitude, lat);
double lonTol = Math.Max(nearest.Longitude, lon) - Math.Min(nearest.Longitude, lon);
if (AeroTracker.AeroWithinTol(aero, lat, lon, latTol, lonTol))
{
aero.RelativeGeoDistance = AeroTracker.GeoDistance(lat, lon, aero.Latitude, aero.Longitude);
if (aero.RelativeGeoDistance < nearest.RelativeGeoDistance)
{
nearest = aero;
}
}
}
if (nearest == null)
{
throw new NullReferenceException("Could not find nearest during return");
}
return(nearest);
}