public static Location GetLocation(FlightPlan flightPlan, DateTime dateTime)
{
long airtimeSeconds = DateUtil.CalcDiffInSec(dateTime,
flightPlan.Initial_Location.Date_Time);
long secInSegmentsSoFar = 0;
Segment currentSeg = null, lastSeg = null;
// Add all segment seconds so far
foreach (Segment segment in flightPlan.Segments)
{
secInSegmentsSoFar += segment.Timespan_Seconds;
if (secInSegmentsSoFar >= airtimeSeconds)
{
currentSeg = segment;
secInSegmentsSoFar -= segment.Timespan_Seconds;
break;
}
lastSeg = segment;
}
// Get the fraction of segment the plane is in
float secInCurrentSegment = Math.Abs(airtimeSeconds - secInSegmentsSoFar);
double fraction = secInCurrentSegment / currentSeg.Timespan_Seconds;
Location fromLocation = flightPlan.Initial_Location;
if (lastSeg != null)
{
fromLocation = new Location(lastSeg.Longitude, lastSeg.Latitude,
DateTime.UtcNow);
}
Location toLocation = new Location(currentSeg.Longitude, currentSeg.Latitude,
DateTime.UtcNow);
return(GetIntermediateLocation(fromLocation, toLocation, fraction));
}