How to draw TLine in a 3D picture?

dot a(x1,y1,z1) and b(x2,y2,z2)
i want to draw a line connect a to b,
TLine ?but i failed
Thanks!

Use TPolyLine3D

Rene

[quote=“brun”]Use TPolyLine3D

Rene[/quote]

Thanks!
i love root!