Unsolved display a set 3d points data to a 3d B-SPLINE by qt data visualization or qt chart?

[cawlfj]

Dear All
I have some points 3d data( xyz) , can i create a B-SPLINE (or nurbs line) by qt data visualization ?
QT chart can make line but can't make 3d line.
Could anybody give me instrution?

best regards,
jeff