/// <summary>
/// Versore normale (ruotato +90 gradi)
/// </summary>
/// <returns>Il vettore perpendicolare, normalizzato a modulo unitario</returns>
public Point2D Normal()
{
Point2D n = new Point2D(- this.y, this.x);
n.Normalize();
return n;
}
/// <summary>
/// Versore (modulo unitario) parallelo
/// </summary>
/// <returns>Il versore o [0,0] se errore</returns>
public Point2D Versor()
{
Point2D n = new Point2D(this.x, this.y);
if(n.Normalize())
return n;
else
return new Point2D();
}