Hello all. I'm working with plug-in for SolidWorks at C#. One of options - create boundary surface (plane) from b-spline curves. How i can do it, without sketches ??
Code for creating b-splines:

        public Curve Create(IPartDoc part, double width)
        {
            Body2 body = part.ICreateNewBody2();
            List points = new List();
            double step = width / Constants.FRAGMENTATION;
            for (int i = 0; i <= Constants.FRAGMENTATION; i++)
            {
                double radius = Zr(i * step);
                points.Add(i * stepX);
                points.Add(i * stepY);
                points.Add(radius);
            }
            Curve spline = body.AddProfileBsplineByPts(points.Count / 3, points.ToArray()) as Curve;
            return spline;
        }

Zr - simple function F(X).