/// <summary>
/// calculate the angle from the location to the "centre" of the racetrack
/// </summary>
/// <param name="location">location on the racetrack</param>
/// <returns></returns>
public double GetAngleToCentre(JLocation location)
{
if (location is null)
{
throw new ArgumentNullException(nameof(location));
}
double latDelta = location.Lat - Centre.Lat;
double lonDelta = location.Lon - Centre.Lon;
return(Math.Atan2(latDelta, lonDelta) * (180 / Math.PI));
}
/// <summary>
/// Calculates the angle to a location taking into account a bendy bit of the track
/// where all locations are adjusted to be equal
/// </summary>
/// <param name="location">the location</param>
/// <returns>the angle to the location, adjusted if necessary for bendy bits of the track</returns>
internal double GetAngleForPosition(JLocation location)
{
double angle = GetAngleToCentre(location);
if (BendyBit[0] < angle && angle < BendyBit[1])
{
// position by angle is unreliable in the bendy bit of the track
// so use the angle to the start for all cars on the bend(s)
angle = BendyBit[0];
}
return(angle);
}
private RaceTrack(string name, JLocation centre, JLocation startFinish, JLocation[] bendyBit)
{
Name = name;
Centre = centre;
// convert all other locations to angles relative to the centre
BendyBit = new double[bendyBit.Length];
for (int i = 0; i < bendyBit.Length; i++)
{
BendyBit[i] = GetAngleToCentre(bendyBit[i]);
}
StartFinishAngle = GetAngleToCentre(startFinish);
}
/// <summary>
/// copy constructor
/// </summary>
/// <param name="location">location value</param>
public JLocation(JLocation location)
: this(location.Lat, location.Lon)
{
}