/// <summary>Calculates distance of two positions in given unit</summary>
/// <param name="pos1">A position</param>
/// <param name="pos2">A position</param>
/// <param name="unit">The unit to get result in</param>
/// <returns>Distance between given points in given unit; 0 if <paramref name="unit"/> is not one of the <see cref="OpenNETCF.IO.Serial.GPS.Units"/> values.</returns>
/// <exception cref="ArgumentException"><see cref="Latitude"/> or <paramref name="Longitude"/> of <paramref name="pos1"/> or <paramref name="pos2"/> is null.</exception>
public static decimal CalculateDistance(GpsPosition pos1, GpsPosition pos2, OpenNETCF.IO.Serial.GPS.Units unit)
{
if (!pos1.Longitude.HasValue || !pos1.Latitude.HasValue)
{
throw new ArgumentException(GPSTracka.Properties.Resources.err_PositionIsNull, "pos1");
}
if (!pos2.Longitude.HasValue || !pos2.Latitude.HasValue)
{
throw new ArgumentException(GPSTracka.Properties.Resources.err_PositionIsNull, "pos2");
}
var ret = GpsPoint.CalculateDistance(new GpsPoint(pos1.Latitude.Value, pos1.Longitude.Value, pos1.Altitude), new GpsPoint(pos2.Latitude.Value, pos1.Longitude.Value, pos2.Altitude));
switch (unit)
{
case OpenNETCF.IO.Serial.GPS.Units.Kilometers: return(ret);
case OpenNETCF.IO.Serial.GPS.Units.Knots: return(ret / 1.85200m);
case OpenNETCF.IO.Serial.GPS.Units.Miles: return(ret / 1.609344m);
default: throw new ArgumentException("Invalid enum argument");
}
}
