TubeVisual3D and Diameters

Have nice time of a day.
At first, I want to say "thank you", Your project is something awesome.
I didn't dive deep into Your code yet, but i have a question. As I can see, TubeVisual3D is an element for making curve tubes with variable diameters throug path - so, what i'm doing wrong?:

TubeVisual3D t = new TubeVisual3D();
            t.Fill = System.Windows.Media.Brushes.Black;
            
            Point3DCollection p3dc = new Point3DCollection();
            List<double> diamlist = new List<double>();
            double dx = 15;
            double dy = 15;
            double dz = 15;
            double dd = 10;
            int n = 30;
            for (int i = 1; i < n; i++)
            {
                p3dc.Add(new Point3D(0 + Math.Pow((double)i / n, 3) * dx, 0 + ((double)i / n) * dy, 0 + ((double)i / n) * dz));
                diamlist.Add(3.5 + ((double)i / n) * dd);
            }
            t.Path = p3dc;
            t.Diameters = diamlist;            
            _HelixViewport3D.Children.Add(t);

and i'm got curve pipe with constant diameter of 1.

Best regards.

p.s. sorry for my bad english, it isn't my native language)

try changing the order of setting Diameters and Path

t.Diameters = diamlist;
t.Path = p3dc;

If you set the diameters last, the mesh will be generated twice.
I will correct the bug.

Wow! Great. TY.