public bool Contains(GeofenceItem geofence, Location point)
{
//Credits: https://stackoverflow.com/a/7739297/2313836
var c = false;
for (int i = 0, j = geofence.Polygons.Count - 1; i < geofence.Polygons.Count; j = i++)
{
if ((((geofence.Polygons[i].Latitude <= point.Latitude) && (point.Latitude < geofence.Polygons[j].Latitude)) ||
((geofence.Polygons[j].Latitude <= point.Latitude) && (point.Latitude < geofence.Polygons[i].Latitude))) &&
(point.Longitude < (geofence.Polygons[j].Longitude - geofence.Polygons[i].Longitude) * (point.Latitude - geofence.Polygons[i].Latitude)
/ (geofence.Polygons[j].Latitude - geofence.Polygons[i].Latitude) + geofence.Polygons[i].Longitude))
{
c = !c;
}
}
return(c);
}
public static GeofenceItem FromFile(string filePath)
{
var geofence = new GeofenceItem();
var lines = File.ReadAllLines(filePath);
foreach (var line in lines)
{
if (line.StartsWith("[", StringComparison.Ordinal))
{
geofence.Name = line.TrimStart('[').TrimEnd(']');
continue;
}
var coordinates = line.Replace(" ", null).Split(',');
var lat = double.Parse(coordinates[0]);
var lng = double.Parse(coordinates[1]);
geofence.Polygons.Add(new Location(lat, lng));
}
return(geofence);
}
