private void UpdateMap(AirTelemetry at, Pushpin pin, MapPolyline polyline, MapLayer layer)
{
Label lbl = new Label();
lbl.Content = at.airline + " " + flight;
FlightMap.Center.Latitude = at.lat;
FlightMap.Center.Longitude = at.lng;
FlightMap.Center.Altitude = at.altitude;
Location centerd = FlightMap.Center;
double zoomd = FlightMap.ZoomLevel;
FlightMap.SetView(centerd, zoomd);
pin.Location = centerd;
FlightMap.Children.Clear();
FlightMap.Children.Add(polyline);
FlightMap.Children.Add(pin);
layer.Children.Clear();
layer.AddChild(lbl, centerd);
WeatherImageLayer(layer);
FlightMap.Children.Add(layer);
}
private void UpdateFlightInfoBox(AirTelemetry at, bool arrived)
{
double compassheading = at.heading < 0 ? at.heading + 360.0 : at.heading;
FlightInfoBox.Content = "Flight " + airline + " " + flight + " travelling " + miles.ToString("N0") + " miles on a heading of " + at.heading.ToString("N0")+ " degrees";
if (arrived)
FlightInfoBox.Content += " Flight has arrived.";
}
async Task TrackFlight(AirTelemetry AT, Location origin, Location destination, double miles)
{
string json="";
var eventHubConnectionString = GetEventHubConnectionString();
var eventHubClient = EventHubClient.CreateFromConnectionString(eventHubConnectionString, eventHubName);
int runningMileCount = 0;
int updateWeatherInverval = 200;
int updateWeatherRadius = 300;
/* how many miles we go per tick */
int mileageIncrement = 30;
Pushpin pin = new Pushpin();
Label infoLabel = new Label();
MapLayer InfoLayer = new MapLayer();
AT.RowKey += DateTime.Now.ToShortDateString();
/* get rid of illegal characters in row key */
AT.RowKey = Regex.Replace(AT.RowKey, @"[\ /?#]", "");
MapPolyline polyline = new MapPolyline();
polyline.Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Blue);
polyline.StrokeThickness = 5;
polyline.Opacity = 0.7;
/* pre-plot the course so that we can draw the flight path on the map. we recalculate the bearing every
* 100 miles (could/should be configurable) to get a true Great Circle route. */
Location prev = origin;
Location nxtl;
double hdg = AT.heading;
polyline.Locations=new LocationCollection();
polyline.Locations.Add(origin);
int j;
for (j = 2; ;j++ )
{
nxtl = Haversine.PositionDistanceFromOrigin(prev, mileageIncrement / 0.00062137, hdg);
polyline.Locations.Add(nxtl);
hdg = Haversine.Bearing(nxtl, destination);
prev = nxtl;
if (Haversine.InRange(nxtl, destination.Latitude, destination.Longitude, 100))
{
polyline.Locations.Add(destination);
break;
}
}
string rkey = AT.RowKey;
AT.lat = origin.Latitude;
AT.lng = origin.Longitude;
UpdateMap(AT, pin, polyline, InfoLayer);
UpdateWeatherFromTable(origin, 300, new TimeSpan(3, 0, 0));
int i;
for (i = 0; i <= polyline.Locations.Count; i++)
{
await Task.Delay(2000);
try
{
AT.RowKey = rkey +'-'+ i.ToString(); /* row key must be unique or will overwrite existing */
FlightMap.Children.Clear();
FlightMap.Children.Add(polyline);
InfoLayer.Children.Clear();
/* we have two time stamps. the first is inherited from TableEntity and normally should not be used by applications. We
* initialize it here because Stream Analytics will barf on an illegal data (dates must be greater than
* 12:00 midnight, January 1, 1601 A.D. (C.E.), UTC.). We do not use the inherited time stamp after this; this is what
* AT.dto is for */
AT.Timestamp = DateTime.Now;
AT.dto = DateTimeOffset.Now;
AT.inflight = "true";
/* send distance in meters */
Location p = Haversine.PositionDistanceFromOrigin(new Location(AT.lat, AT.lng), mileageIncrement / 0.00062137, AT.heading);
AT.lat = p.Latitude;
AT.lng = p.Longitude;
double b2 = Haversine.Bearing(p, destination);
AT.heading = b2;
/* altitude in meters */
if (i < 5)
AT.altitude = 10000 / (6 - (i + 1)); /* ascending */
else if ((polyline.Locations.Count - i) < 5)
AT.altitude = 10000 / (polyline.Locations.Count+1 - i); /* descending */
else
AT.altitude = 10000;
/* initialize the data structure */
AT.ice = 0.0;
AT.windspeed = 0.0;
AT.windshear = 0.0;
AT.lightning = 0.0;
/* encode weather conditions */
if(ltice)
{
AT.ice = 5.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.LIGHT_ICE, DateTime.Now, p);
weatherevents.Add(we);
ltice = false;
}
else if(mdice)
{
AT.ice = 10.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.MODERATE_ICE, DateTime.Now, p);
weatherevents.Add(we);
mdice = false;
}
else if (hvice)
{
AT.ice = 20.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.HEAVY_ICE, DateTime.Now, p);
weatherevents.Add(we);
hvice = false;
}
if(mdtub)
{
AT.windspeed = 20.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.MODERATE_TURB, DateTime.Now, p);
weatherevents.Add(we);
mdtub = false;
}
else if(hvtub)
{
AT.windspeed = 40.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.HEAVY_TURB, DateTime.Now, p);
weatherevents.Add(we);
hvtub = false;
}
if(mdshr)
{
AT.windshear = 20.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.MODERATE_SHEAR, DateTime.Now, p);
weatherevents.Add(we);
mdshr = false;
}
else if(hvshr)
{
AT.windshear = 40.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.HEAVY_SHEAR, DateTime.Now, p);
weatherevents.Add(we);
hvshr = false;
}
if(tstrm)
{
AT.lightning = 50.0;
WeatherEvent we = new WeatherEvent(WeatherEventTypes.TSTORM, DateTime.Now, p);
weatherevents.Add(we);
tstrm = false;
}
json = Newtonsoft.Json.JsonConvert.SerializeObject(AT);
Console.WriteLine("{0} > Sending message: {1}", DateTime.Now.ToString(), json);
FlightMap.Center.Latitude = p.Latitude;
FlightMap.Center.Longitude = p.Longitude;
FlightMap.Center.Altitude = AT.altitude;
Location center = FlightMap.Center;
double zoom = FlightMap.ZoomLevel;
FlightMap.SetView(center, zoom);
pin.Location = center;
FlightMap.Children.Add(pin);
infoLabel.Content = AT.airline + " " + AT.flight;
InfoLayer.AddChild(infoLabel, center);
WeatherImageLayer(InfoLayer);
FlightMap.Children.Add(InfoLayer);
UpdateFlightInfoBox(AT, false);
if(Haversine.InRange(new Location(AT.lat, AT.lng), destination.Latitude,destination.Longitude,50))
break;
await eventHubClient.SendAsync(new EventData(Encoding.UTF8.GetBytes(json)));
runningMileCount += mileageIncrement;
if(runningMileCount>=updateWeatherInverval)
{
runningMileCount = 0;
weatherevents.Clear();
UpdateWeatherFromTable(new Location(AT.lat, AT.lng), updateWeatherRadius, new TimeSpan(3, 0, 0));
}
}
catch (Exception exception)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("{0} > Exception: {1}", DateTime.Now.ToString(), exception.Message);
Console.ResetColor();
}
}
AT.arrival = DateTime.Now;
AT.inflight = "false";
/* fudge the destination position */
AT.lat=FlightMap.Center.Latitude = destination.Latitude;
AT.lng=FlightMap.Center.Longitude = destination.Longitude;
FlightMap.Center.Altitude = AT.altitude;
UpdateMap(AT, pin, polyline, InfoLayer);
json = Newtonsoft.Json.JsonConvert.SerializeObject(AT);
await eventHubClient.SendAsync(new EventData(Encoding.UTF8.GetBytes(json)));
UpdateFlightInfoBox(AT, true);
}
async private void StartFlight_Click(object sender, RoutedEventArgs e)
{
airline=AirlineNameBox.Text; ;
flight=AirlineFlightNumberBox.Text;
origin=DepartureCityBox.Text;
destination=ArrivalCityBox.Text;
origin = origin.ToUpper();
destination = destination.ToUpper();
if (string.IsNullOrEmpty(airline) ||
string.IsNullOrEmpty(flight) ||
string.IsNullOrEmpty(origin) ||
string.IsNullOrEmpty(destination))
{
FlightInfoBox.Content = "Missing data, please re-enter";
return;
}
if(origin.Length != 3 || destination.Length!=3)
{
FlightInfoBox.Content = "Cities not encoded properly, use 3-letter airport code";
}
double originlat = 0.0;
double originlng = 0.0;
double destlat = 0.0;
double destlong = 0.0;
string origincity = airports[origin];
string destcity = airports[destination];
int error = 0;
int erro2 = 0;
error=GetLatLongFromName(origincity, out originlat, out originlng);
error=GetLatLongFromName(destcity, out destlat, out destlong);
/* possible errors on Bing lookup:
* call error == -1
* if both lat and long of a lookup are 0.0 then Bing couldn't resolve the name (fix
* the airport-codes.csv file)
*/
if(error<0 || erro2<0 || (originlat==0.0&&originlng==0.0) || (destlat==0.0 && destlong==0.0))
{
FlightInfoBox.Content = "Error; please try again.";
return;
}
/* get distance and heading */
Location o = new Location(originlat, originlng);
Location d = new Location(destlat, destlong);
double distance = Haversine.HaversineDistance(o, d);
miles = distance * 0.00062137;
double heading = Haversine.Bearing(o, d);
/* create the packet */
AirTelemetry AT = new AirTelemetry();
AT.PartitionKey = "airtelemetry";
AT.RowKey = airline.ToLower() + flight;
AT.airline = airline;
AT.flight = flight;
AT.lat = o.Latitude;
AT.lng = o.Longitude;
AT.heading = heading;
AT.airspeed = 0.0;
AT.temp = 38.0;
AT.ice = 0.0;
AT.lightning = 0.0;
AT.windshear = 0.0;
AT.windspeed = 15.0;
AT.arrival = DateTime.Now;
UpdateFlightInfoBox(AT, false);
if (CreateEventHub())
{
await TrackFlight(AT, o, d, miles);
}
}
