/// <summary>
/// Test la colinéarité entre le veteur this et le vecteur u.
/// </summary>
/// <param name="u"></param>
/// <returns></returns>
public bool IsColinearTo(Vector2D u)
{
return(Math.Abs(Det(u)) < ZERO_APPROX);
}
public double Det(Vector2D v)
{
return((X * v.Y) - (Y * v.X));
}
public double Dot(Vector2D v)
{
return((X * v.X) + (Y * v.Y));
}
public Vector2D Sub(Vector2D v)
{
return(new Vector2D(X - v.X, Y - v.Y));
}
public Vector2D Add(Vector2D v)
{
return(new Vector2D(X + v.X, Y + v.Y));
}
public Vector2D(Vector2D v)
{
X = v.X;
Y = v.Y;
}