when i creat nodes its not direct look in my exemple
No offense, but you'd better recheck your english before hitting the submit button. There should be a "." between "direct" and "look". That's the reason I didn't understand you.

About the problem, I just opened a thread that contains code to generate splines:

http://www.pascalgamedevelopment.com...p?topic=6101.0

There's also another thread here:

http://www.pascalgamedevelopment.com...p?topic=5833.0

Before you ask, I can't give you a nice GLScene example project containing this code. You must try to understand the code and then use it in your own project.