/// <summary>
/// Draws line from the initial or last drawn point.
/// </summary>
/// <param name="d">Distance</param>
/// <param name="bearingChange">Bearing change in degrees</param>
/// <example>
/// The following example draws a 5 km square in the USA.
/// <code>
/// //Create a coordinate with EagerLoading off for efficiency during drawing.
/// Coordinate c = new Coordinate(31.65, -84.02, new EagerLoad(false));
///
/// //Create the GeoFence Drawer, specifying an ellipsoidal earth
/// //shape with a start bearing / direction faced of 0 degrees.
/// GeoFence.Drawer gd = new GeoFence.Drawer(c, Shape.Ellipsoid, 0);
///
/// //Draw the first line using the initial bearing (0 means no change in heading)
/// gd.Draw(new Distance(5), 0);
/// //Draw the next to line by changing 90 degrees at each point.
/// gd.Draw(new Distance(5), 90);
/// gd.Draw(new Distance(5), 90);
/// //Close the shape by drawing from the line end point to the initial coordinate.
/// gd.Close();
/// </code>
/// </example>
public void Draw(Distance d, double bearingChange)
{
//Store reference point for reverse bearing lookup
referenceCoordinate = new Coordinate(initialCoordinate.Latitude.ToDouble(), initialCoordinate.Longitude.ToDouble(), new EagerLoad(false));
//Get new bearing
//This formula will account for bearing changes of distance and offset the next movement
bearing = (finalBearing - bearing + bearing + bearingChange) % 360;
initialCoordinate.Move(d, bearing, shape);
finalBearing = (new Distance(initialCoordinate, referenceCoordinate, shape).Bearing + 180) % 360;
Coordinate nc = new Coordinate(initialCoordinate.Latitude.ToDouble(), initialCoordinate.Longitude.ToDouble(), initialCoordinate.GeoDate, initialCoordinate.EagerLoadSettings);
nc.equatorial_radius = initialCoordinate.equatorial_radius;
nc.inverse_flattening = initialCoordinate.inverse_flattening;
points.Add(nc);
}
