public DayAndNightViewModel(MapControl map)
{
this.map = map;
InitializeTimer();
Map.Layers[0].Loaded += DayAndNightViewModel_Loaded;
IsSteady = true;
SunPosition = new GeoPoint();
MoonPosition = new GeoPoint();
DayAndNightLineVertices = new CoordPointCollection();
ActualDateTime = DateTime.UtcNow;
}
CoordPointCollection GetdayAndNightLineVertices(GeoPoint sunLocation, double step)
{
CoordPointCollection result = new CoordPointCollection();
IList <double> latitudes = DayAndNightLineCalculator.GetDayAndNightLineLatitudes(sunLocation.Latitude, sunLocation.Longitude, step);
double lon = -180;
foreach (double lat in latitudes)
{
result.Add(new GeoPoint(lat, lon));
lon += step;
}
return(result);
}
public CoordPointCollection GetAirPath()
{
CoordPointCollection result = new CoordPointCollection();
foreach (TrajectoryPart trajectoryPart in trajectory)
{
result.Add(trajectoryPart.StartPoint);
}
if (trajectory.Count > 0)
{
result.Add(trajectory[trajectory.Count - 1].EndPoint);
}
return(result);
}
void AddSouthContour(CoordPointCollection dayAndNightLineVertices)
{
double initLat = Math.Ceiling(((GeoPoint)dayAndNightLineVertices[dayAndNightLineVertices.Count - 1]).Latitude);
for (double lat = initLat; lat >= -90.0; lat--)
{
dayAndNightLineVertices.Add(new GeoPoint(lat, 180));
}
for (double lon = 180; lon >= -180; lon--)
{
dayAndNightLineVertices.Add(new GeoPoint(-90, lon));
}
initLat = Math.Ceiling(((GeoPoint)dayAndNightLineVertices[0]).Latitude);
for (double lat = -90; lat <= initLat; lat++)
{
dayAndNightLineVertices.Add(new GeoPoint(lat, -180));
}
}
void AddNorthContour(CoordPointCollection dayAndNightLineVertices)
{
double initLat = Math.Ceiling(((GeoPoint)dayAndNightLineVertices[dayAndNightLineVertices.Count - 1]).Latitude);
for (double latForward = initLat; latForward <= 90.0; latForward++)
{
dayAndNightLineVertices.Add(new GeoPoint(latForward, 180));
}
for (double lon = 180; lon >= -180; lon--)
{
dayAndNightLineVertices.Add(new GeoPoint(90, lon));
}
initLat = Math.Ceiling(((GeoPoint)dayAndNightLineVertices[0]).Latitude);
for (double latBackward = 90; latBackward >= initLat; latBackward--)
{
dayAndNightLineVertices.Add(new GeoPoint(latBackward, -180));
}
}
void UpdateDayAndNightLine()
{
double[] sun3DPosition = DayAndNightLineCalculator.CalculateSunPosition(ActualDateTime);
GeoPoint sunPosition = new GeoPoint(sun3DPosition[1], sun3DPosition[0]);
GeoPoint moonPosition = GetOppositePoint(sunPosition);
CoordPointCollection dayAndNightLineVertices = GetdayAndNightLineVertices(sunPosition, 0.1);
bool isNorthNight = DayAndNightLineCalculator.CalculateIsNorthNight(sun3DPosition);
if (isNorthNight)
{
AddNorthContour(dayAndNightLineVertices);
}
else
{
AddSouthContour(dayAndNightLineVertices);
}
SunPosition = sunPosition;
MoonPosition = moonPosition;
DayAndNightLineVertices = dayAndNightLineVertices;
}
