private IList <GPSPointViewModel> processGPSPoints(IList <GPSPoint> points)
{
var viewModels = new List <GPSPointViewModel>();
decimal distance = 0;
GPSPoint previousPoint = null;
for (int index = 0; index < points.Count; index++)
{
var gpsPoint = points[index];
if (gpsPoint.IsPause())
{
previousPoint = null;
}
if (gpsPoint.IsPoint() && previousPoint != null)
{
var coordinate1 = previousPoint.ToCoordinates();
var coordinate2 = gpsPoint.ToCoordinates();
distance += (decimal)coordinate2.GetDistanceTo(coordinate1);
}
GPSPointViewModel pointViewModel = new GPSPointViewModel(gpsPoint);
pointViewModel.Distance = distance;
viewModels.Add(pointViewModel);
if (gpsPoint.IsPoint())
{
previousPoint = gpsPoint;
}
}
return(viewModels);
}
private IList <LapViewModel> fillLapsInfo(IList <GPSPointViewModel> points, decimal lapLength)
{
IList <LapViewModel> laps = new List <LapViewModel>();
var veryFirst = points.FirstOrDefault();
GPSPointViewModel start = veryFirst;
LapViewModel bestLap = null;
decimal lapDistance = 0;
for (int i = 1; i < points.Count; i++)
{
lapDistance = points[i].Distance - start.Distance;
bool isLastPoint = i == points.Count - 1;
if (lapDistance >= lapLength || isLastPoint)
{
var endLapPoint = points[i];
//if distance is higher than exact lap length then create virtual gps point and calculate speed and duration
if (lapDistance > lapLength)
{
var above = lapDistance - lapLength;
var twoLastPointTime = (decimal)(points[i].Point.Duration - points[i - 1].Point.Duration);
var twoLastPointsDistance = points[i].Distance - points[i - 1].Distance;
var midDuration = twoLastPointTime - ((twoLastPointTime * above) / twoLastPointsDistance) + (decimal)points[i - 1].Point.Duration;
var bearing = GPSTrackerHelper.CalculateInitialBearing(points[i - 1].Point, points[i].Point);
var midPoint = GPSTrackerHelper.CalculateDestination(points[i - 1].Point, bearing, (double)((laps.Count * lapLength + (lapDistance - above)) - points[i - 1].Distance));
midPoint.Duration = (float)midDuration;
midPoint.Speed = points[i].Point.Speed;
GPSPointViewModel midPointViewModel = new GPSPointViewModel(midPoint);
midPointViewModel.Distance = (laps.Count + 1) * lapLength;
midPointViewModel.IsVirtual = true;
endLapPoint = midPointViewModel;//inject new virtual point as a end lap point
//now we should insert mid point between two points
points.Insert(i, midPointViewModel);
}
var lapViewModel = new LapViewModel(start, endLapPoint);
lapViewModel.LapTime = TimeSpan.FromSeconds(lapViewModel.EndPoint.Point.Duration - lapViewModel.StartPoint.Point.Duration);
lapViewModel.TotalTime = TimeSpan.FromSeconds(lapViewModel.EndPoint.Point.Duration - veryFirst.Point.Duration);
lapViewModel.Speed = lapViewModel.LapTime.TotalSeconds > 0 ? (lapDistance / (decimal)lapViewModel.LapTime.TotalSeconds) : 0;
laps.Add(lapViewModel);
lapViewModel.Nr = laps.Count;
lapViewModel.Distance = lapViewModel.EndPoint.Distance;
start = endLapPoint;
if (isLastPoint && lapDistance < lapLength)
{//if last lap is smaller than lap length
lapViewModel.FullLap = false;
}
if (bestLap == null || (bestLap.LapTime > lapViewModel.LapTime && lapViewModel.FullLap))
{
bestLap = lapViewModel;
}
}
}
if (bestLap != null)
{
bestLap.BestLap = true;
}
return(laps);
}
public LapViewModel(GPSPointViewModel startPoint, GPSPointViewModel endPoint)
{
this.startPoint = startPoint;
this.endPoint = endPoint;
}