private void updateLandingRoll(APIAircraftState state)
{
if (_pLastState == null)
{
_pLastState = state;
}
else if (!state.IsOnGround)
{
_pLastState = state;
_pLastLandingRoll = 0.0;
_pLandingLocation = null;
_txtLandingRoll.IsVisible = false;
_txtLandingRollLabel.IsVisible = false;
//btnViewLandingStats.Visibility = Visibility.Hidden;
}
else if (!_pLastState.IsLanded && state.IsLanded
) //Just transitioned to "landed" state, so start the roll accumulation
{
_pLandingLocation = state.Location;
_pStateJustBeforeTouchdown = _pLastState;
_pStateJustAfterTouchdown = state;
_pLastState = state;
}
else if (state.IsLanded && _pLandingLocation != null) //We are in landed state. Calc the roll length.
{
var currentPosition = state.Location;
var R = 3959; // Radius of the earth in miles
var dLat = (currentPosition.Latitude - _pLandingLocation.Latitude) * (Math.PI / 180);
var dLon = (currentPosition.Longitude - _pLandingLocation.Longitude) * (Math.PI / 180);
var a =
Math.Sin(dLat / 2) * Math.Sin(dLat / 2) +
Math.Cos(currentPosition.Latitude * (Math.PI / 180)) *
Math.Cos(_pLandingLocation.Latitude * (Math.PI / 180)) *
Math.Sin(dLon / 2) * Math.Sin(dLon / 2)
;
var c = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a));
var d = R * c; // Distance in miles
d *= 5280; //Distance in ft
_txtLandingRoll.Text = string.Format("{0:0.00}", d) + " ft";
_txtLandingRoll.IsVisible = true;
_txtLandingRollLabel.IsVisible = true;
_pLastState = state;
_landingDetails.updateLandingStats(_pLandingLocation, _pAircraftState.Location,
_pStateJustBeforeTouchdown, _pStateJustAfterTouchdown, "");
}
if (_pLandingLocation != null && state.IsLanded && state.IsOnGround && state.GroundSpeedKts < 10)
{
_pLandingStatDlg = new LandingStats();
_pLandingStatDlg.updateLandingStats(_pLandingLocation, _pAircraftState.Location,
_pStateJustBeforeTouchdown, _pStateJustAfterTouchdown, "");
_landingDetails.updateLandingStats(_pLandingLocation, _pAircraftState.Location,
_pStateJustBeforeTouchdown, _pStateJustAfterTouchdown, "");
//btnViewLandingStats.Visibility = Visibility.Visible;
}
}
private void InitializeUiElements()
{
_airplaneStateGrid = this.FindControl <Grid>("airplaneStateGrid");
_overlayGrid = this.FindControl <Grid>("overlayGrid");
_atcMessagesDataGrid = this.FindControl <DataGrid>("atcMessagesDataGrid");
_ipLabel = this.FindControl <TextBlock>("ipLabel");
_txtLandingRoll = this.FindControl <TextBlock>("txtLandingRoll");
_txtLandingRollLabel = this.FindControl <TextBlock>("txtLandingRollLabel");
_mainTabControl = this.FindControl <TabControl>("mainTabControl");
_expander = this.FindControl <Expander>("expander");
_TabItem_ATC = this.FindControl <TabItem>("TabItem_ATC");
_landingDetails = this.FindControl <LandingStats>("landingDetails");
_FMSControl = this.FindControl <FMS>("FMSControl");
_AttitudeIndicator = this.FindControl <AttitudeIndicator>("AttitudeIndicator");
_AircraftStateControl = this.FindControl <AircraftStatus>("AircraftStateControl");
_FpdControl = this.FindControl <FlightPlanDb>("FpdControl");
}