Hello!

Now, I'm drawing some cube in 3d-space using line series.
l set line series's line segment shape that is 'Tube'.
Then, I added some data point in that line series.
For example,
line = (NLineSeries)chart.Series[i];
line.LineSegmentShape = LineSegmentShape.Tube;
line.BorderStyle.Width = new NLength(0, NGraphicsUnit.Pixel);
line.UseXValue = true;
line.UseZValue = true;
line.Fillstyle = new NColorFillStyle(Color.Red);

line.AddDataPoint(3,-3,-7);
line.AddDataPoint(3,3,-7);
....

In this case, all of the Vertical Tube(only y-value changed) are located center line.

When I changed only line segment shape tube to Tape or Line (Not Tube, Ellipsoid), I could get correct line location.
But tube and Ellipsoid are not so good. What's the problem??