public static void Update()
{
Vessel vessel = FlightGlobals.ActiveVessel;
if (vessel == null)
{
return;
}
if (destinationAirfield == null)
{
return;
}
distanceToAirfield = NavUtils.DistanceToAirfield(vessel, destinationAirfield);
bearingToAirfield = NavUtils.InitialBearingToAirfield(vessel, destinationAirfield);
// do this not to often and not in an airfield
if (landingRunway == null || distanceToAirfield > 2000 || !InBeam)
{
landingRunway = destinationAirfield.GetLandingRunwayForBearing(bearingToAirfield);
ILS = landingRunway.HasILS;
}
if (landingRunway != null)
{
// Bearing to runway
bearingToRunway = NavUtils.InitialBearingToRunway(vessel, landingRunway);
if (bearingToRunway < 0)
{
bearingToRunway = 360 - bearingToRunway;
}
//
// distance to runway
distanceToRunway = NavUtils.DistanceToRunway(vessel, landingRunway);
//
// glide slope
horizontalGlideslopeDeviation = NavUtils.HorizontalGlideSlopeDeviation(bearingToRunway, landingRunway);
verticalGlideslopeDeviation = NavUtils.VerticalGlideSlopeDeviation(vessel, landingRunway);
//
// check if we are inside the ILS cone
bool insideHorizontalBeam = NavUtils.InsideCone(bearingToRunway, landingRunway.To, landingRunway.ILSCone);
bool insideVerticalBeam = NavUtils.InsideCone(verticalGlideslopeDeviation, 0.0, landingRunway.ILSCone);
InBeam = insideHorizontalBeam && insideVerticalBeam && distanceToRunway <= landingRunway.ILSRange;
}
else
{
bearingToRunway = 0.0;
distanceToRunway = double.MaxValue;
InBeam = false;
horizontalGlideslopeDeviation = double.MaxValue;
verticalGlideslopeDeviation = double.MaxValue;
}
}