/// <summary>
/// Create a random IFR flight
/// </summary>
/// <param name="awyTableRef">The airway table to chose from</param>
/// <param name="acftNo">The aircraft regNo</param>
/// <param name="acftType">The aircraft type</param>
/// <param name="airline">The airline operator ICAO code</param>
/// <returns></returns>
public static CmdList GetRandomFlight(awyTable awyTableRef, int acftNo, string acftType, string airline)
{
var route = new CmdList( );
var visited = new List <string>( ); // visited Navs and Fixes, we don't want to run circles
var awy = GetRandomAwy(awyTableRef);
if (awy == null)
{
return(route); // no airways available ??
}
// add Aircraft Descriptor first
route.Enqueue(new CmdA(acftType, CmdA.FlightT.Airway, airline));
// some random altitude and complete start of the route
var altMsl = m_random.Next(MinLevel(awy.baseFt), MaxLevel(awy.topFt));
altMsl = (int)Math.Round(altMsl / 100.0) * 100; // get 100 ft increments
route.Descriptor.InitFromAirway(acftNo, awy, altMsl, GetSpeed(awy.layer)); // set start conditions (assumes MslBase=0)
// add segment length command
route.Enqueue(new CmdD(awy.Distance_nm));
visited.Add(awy.startID); // we add all startIDs
// do we have an airway to go from here?
var newleg = awyTableRef.GetNextSegment(awy);
while (newleg != null)
{
if (visited.Contains(newleg.startID))
{
break; // this would create a circle (endless loop)
}
awy = newleg;
// random speed change
if (m_random.Next(10) == 0) // one out of 10
// add S command
{
route.Enqueue(new CmdS(GetSpeed(awy.layer)));
}
// random alt change
if (m_random.Next(20) == 0) // one out of 20
// add V command
{
altMsl = GetNewAlt(altMsl, awy.baseFt, awy.topFt);
route.Enqueue(new CmdV(1200, altMsl));
}
// add Goto command
route.Enqueue(new CmdG(awy.end_latlon));
visited.Add(awy.startID); // we add all startIDs to avoid loops above
// try next one
newleg = awyTableRef.GetNextSegment(awy);
}
route.Descriptor.FinishFromAirway(awy); // set end location ID from last segment
// add mandatory end segment
route.Enqueue(new CmdE( ));
return(route);
}
/// <summary>
/// Converts from a list of AITraffic messages to a route
/// returns null if something was wrong
/// </summary>
/// <param name="aitStream">A list of AITraffic messages as strings</param>
/// <returns>A created route or null</returns>
private CmdList RouteFromAIT(List <string> aitStream, bool absoluteTrack, bool ignoreAirborne)
{
if (aitStream.Count < 2)
{
Error = "# messages 2"; return(null);
}
; // we don't handle below 3 reports
var vac = RealTraffic.FromAITrafficString(aitStream[0]);
if (vac == null)
{
Error = "AIT message conversion error"; return(null);
}
; // converter error
long cTs = vac.TStamp; // start time,
var cPos = new LatLon(vac.LatLon);
double cAlt = vac.Alt_ft;
double cGs = vac.GS;
double cVsi = vac.VSI;
double cTrack = vac.TRK;
if (cGs == 0)
{
//Initial Speed is Zero - we may not have GS at all so try to calculate some..
// try to calculate a GS
var vac1 = RealTraffic.FromAITrafficString(aitStream[1]);
if (vac1 == null)
{
return(null); // ERROR Exit, this one is not usable at all
}
cGs = cPos.DistanceTo(vac1.LatLon, ConvConsts.EarthRadiusNm) * 3600.0 / (vac1.TStamp - vac.TStamp); // let's try the calculated one..
}
;
if (cGs == 0)
{
//Still Speed is Zero - we may not have GS at all so try to calculate some..
Error = "Speed is not available, cannot continue";
return(null);
}
double maxGS = cGs; // track Max Speed to adjust for the AcftType later
var route = new CmdList( );
CmdA a = null;
if (absoluteTrack)
{
a = new CmdA(vac.AcftType, CmdA.FlightT.MsgAbsolute);
a.CreateForMsgAbsolute(cPos, cTrack, cAlt, cGs);
}
else
{
a = new CmdA(vac.AcftType, CmdA.FlightT.MsgRelative);
a.CreateForMsgRelative(cAlt, cGs);
}
route.Enqueue(a);
// walk through route
for (int i = 1; i < aitStream.Count; i++)
{
if (string.IsNullOrEmpty(aitStream[i]))
{
continue; // empty CRLFs ??
}
vac = RealTraffic.FromAITrafficString(aitStream[i]);
if (vac == null)
{
Error = "AIT message conversion error"; return(null);
}
; // converter error
if ((!ignoreAirborne) && (!vac.Airborne))
{
continue; // catch some incomplete ones
}
// see what delta we have
long dT = vac.TStamp - cTs;
cTs = vac.TStamp; // update time
if (vac.GS == 0)
{
// try to calculate a GS ( but this does not account for turns - so it is likely too low
vac.GS = cPos.DistanceTo(vac.LatLon, ConvConsts.EarthRadiusNm) * 3600.0 / dT; // let's try the calculated one..
}
if (vac.GS < 5)
{
continue; // plane is not moving
}
double dAlt = vac.Alt_ft - cAlt;
double dGs = vac.GS - cGs;
double dTrk = vac.TRK - cTrack;
double dVsi = vac.VSI - cVsi;
maxGS = (vac.GS > cGs) ? vac.GS : cGs;
// change speed if delta is large enough
// don't collect speeds under 5 else the model does not move anymore..
if ((vac.GS >= 5) && Math.Abs(dGs) > 4)
{
route.Enqueue(new CmdS(vac.GS));
cGs = vac.GS; // update if used
}
// change Alt if delta is large enough
if (Math.Abs(dAlt) > 25)
{
if (dAlt > 0 && cVsi < 0)
{
cVsi = 1200; // wrong sign, just apply a VSI
}
if (dAlt < 0 && cVsi > 0)
{
cVsi = 1200; // wrong sign, just apply a VSI
}
route.Enqueue(new CmdV(cVsi, vac.Alt_ft)); // we change at old VSI as this was the start to get to the new alt
cAlt = vac.Alt_ft; // update if used
cVsi = vac.VSI; // update if used
}
// Goto Pos
if (absoluteTrack)
{
//just goto absolute location (let the model do the flying..)
route.Enqueue(new CmdG(vac.LatLon));
}
else
{
// OR calc Direction and Distance for relative flying..
route.Enqueue(new CmdH(cPos.BearingTo(vac.LatLon)));
route.Enqueue(new CmdD(cPos.DistanceTo(vac.LatLon, ConvConsts.EarthRadiusNm)));
}
cPos = new LatLon(vac.LatLon); // move position
cTrack = vac.TRK; // update track
}
route.Enqueue(new CmdE( )); // mandatory end command
// we don't know the real acft type (no lookup in the converter)
// so take a jet for above 180 and a GA one below
if (maxGS > 180)
{
route.Descriptor.UpdateAcftType(Aircrafts.AircraftSelection.GetRandomAcftTypeOp( ).AcftType);
}
else
{
route.Descriptor.UpdateAcftType(Aircrafts.AircraftSelection.GetRandomGAAcftTypeOp( ).AcftType);
}
return(route);
}