private void Positioning()
{
try
{
/* Load fingerprinting data from the server */
List <AdjustedFingerprinting> fingerprintings = IndoorPositioningClient.GetFingerprintings(environment.EnvironmentId);
/* Disappear the loading splash screen */
Application.Current.Dispatcher.Invoke(() => ShowLoadingScreen = false);
while (PositioningActivated)
{
try
{
Coordinate coordinate = new Coordinate();
/* Run KNNClassifier */
if (SelectedAlgorithmIndex == 0)
{
coordinate = Positioning_Knn(fingerprintings);
}
else if (SelectedAlgorithmIndex == 1)
{
coordinate = Positioning_KnnProximity(fingerprintings);
}
else if (SelectedAlgorithmIndex == 2)
{
coordinate = Positioning_Proximity();
}
else
{
throw new Exception("Invalid algorithm");
}
/* Success process, clear error message if any */
Application.Current.Dispatcher.Invoke(() => txtAlert.Text = "");
/* Add the beacon localized onto the screen */
Application.Current.Dispatcher.Invoke(() => environmentShape.MoveBeacon(coordinate.Xaxis, coordinate.Yaxis));
}
catch (ThreadAbortException) { break; }
catch (Exception ex)
{
Application.Current.Dispatcher.Invoke(() => txtAlert.Text = ex.Message);
}
finally
{
/* Every second, query the server for the RSSI values read by the gateways */
Thread.Sleep(2000);
}
}
}
catch (ThreadAbortException) { /* do nothing */ }
catch (Exception ex)
{
Application.Current.Dispatcher.Invoke(() => MessageBox.Show(ex.ToString()));
}
}
