public double CrossProduct(FreeVector other)
{
Vector v = new Vector(_p.X, _p.Y);
Vector u = new Vector(other._p.X, other._p.Y);
//return this.X * other.Y - this.Y * other.X;
return(Vector.CrossProduct(v, u));
}
public bool IsApproxHorizontal()
{
//double angle = Math.Atan(_p.Y / _p.X);
//return Math.Abs(angle) <= eps_deg;
FreeVector v = this;
v.Length = 1;
return(Math.Abs(_p.Y) <= 5);
}
public bool IsApproxVertical()
{
//double angle = Math.Atan(_p.Y / _p.X);
//return Math.Abs(angle - (Math.PI / 2)) <= (eps_deg * 1.5);
FreeVector v = this;
v.Length = 1;
return(Math.Abs(_p.X) <= 5);
}
public Direction GetDirection(FreeVector v)
{
return(this.CrossProduct(v) >= 0 ? Direction.Anticlockwise
: Direction.Clockwise);
}