private void PrepareDisplayPositions()
{
foreach (GeoPlacemark place in visiblePlacemarks)
{
double mathAngle = 90 - Math.Abs(place.Angle);
double x = (place.Distance * Math.Cos(LatLongMath.ToRad(mathAngle)));
double y = (place.Distance * Math.Sin(LatLongMath.ToRad(mathAngle)));
x = (x * (displayWidth / maxDistance));
y = (place.Distance * (displayHeight / maxDistance));
if (place.Angle < 0)
{
x = -x;
}
place.DisplayX = (displayWidth / 2) + x;
place.DisplayY = (displayHeight - y);
}
}
public GeoPlacemark GetNextPoint(double compassHeading)
{
if (pathWay.Count > 0)
{
GeoPlacemark place = pathWay.ElementAt(0);
double newSpan = 80;
left = ((compassHeading - newSpan) + 360) % 360;
right = ((compassHeading + newSpan) + 360) % 360;
place.Angle = FindAngularDisplacement(place, compassHeading);
if (place.Angle != -180)
{
double mathAngle = 90 - Math.Abs(place.Angle);
double x = (place.Distance * Math.Cos(LatLongMath.ToRad(mathAngle)));
double y = (place.Distance * Math.Sin(LatLongMath.ToRad(mathAngle)));
x = (x * ((displayWidth / 3) / place.Distance));
y = (place.Distance * (displayHeight / (maxDistance / 3)));
if (place.Angle < 0)
{
x = -x;
}
place.DisplayX = (displayWidth / 2) + x;
//place.DisplayY = (displayHeight - y);
place.DisplayY = (displayHeight) - y;
}
return(place);
}
return(null);
}