public static double GetDistance(Vector2d point1, Vector2d point2)
{
var dX = point1.X - point2.X;
var dY = point1.Y - point2.Y;
return Math.Sqrt(dX * dX + dY * dY);
}
public void AddTo(Vector2d force)
{
X += force.X;
Y += force.Y;
}
