public async static void Update(GeoCoord geo)
{
try
{
var visibileAPs = await WlanClient.GetWiFiAP();
foreach (var y in visibileAPs)
{
apLocs.Add(new Tuple<GeoCoord, WiFiAP>(geo, y));
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
}
/// <returns>Meters squared</returns>
internal double DistSqr(GeoCoord x0)
{
// Determine the actual size of the geography.
// From http://en.wikipedia.org/wiki/Latitude,
// and assuming the earth is spherical (e=1)
var offsetMeters = OffsetInMeters(x0);
var ret = Math.Pow(offsetMeters.X, 2) + Math.Pow(offsetMeters.Y, 2);
return ret;
}
public FakePoint OffsetInMeters(GeoCoord geoC)
{
// Determine the actual size of the geography.
// From http://en.wikipedia.org/wiki/Latitude,
// and assuming the earth is spherical (e=1)
double x = -(this.Longitude - geoC.Longitude) * LonDegreeSizeInMeters;
double y = (this.Latitude - geoC.Latitude) * LatDegreeSizeInMeters;
var ret = new FakePoint(x, y);
return ret;
}
public GeoCoord FromPixelOffset2(double x, double y, int levelOfDetail)
{
ulong twotoPow = 2;
for (int i = 1; i < levelOfDetail; i++)
{
twotoPow *= 2;
}
double MapSize = (uint)256 << levelOfDetail;
// MapSize /= 8;
double Longitude = x / (PiDiv180 * MapSize);
double Latitude = y * Math.Cos(this.Latitude * PiDiv180) / (PiDiv180 * MapSize);
var ret = new GeoCoord(Latitude, Longitude);
return ret;
}
public GeoCoord FromOffset(double x, double y)
{
double Longitude = this.Longitude + x / LonDegreeSizeInMeters;
double Latitude = this.Latitude - y / LatDegreeSizeInMeters;
var ret = new GeoCoord(Latitude, Longitude);
return ret;
}
public static GeoCoord Minimizer(Func<GeoCoord, double> f, GeoCoord guess)
{
var ret = Minimizer((x) => f(new GeoCoord(x[0], x[1])), new double[] { guess.Latitude, guess.Longitude }, new double[] { 0.1, 0.1 });
return new GeoCoord(ret[0], ret[1]);
}
