Gets or sets the direction of the y-axis of this plane. Setting the y-axis results in a reculculation of the x-axis to make the axis perpendicular.

public GeoVector DirectionY { get; set; }

Public Property DirectionY As GeoVector
	Get
	Set

public:
property GeoVector DirectionY {
	GeoVector get ();
	void set (GeoVector value);
}