animation using a NURBS curve

Hello,
I wonder if there is a straightforward way of using a NURBS curve to perform kinematic animation, e.g. to record some passage points of an object moving over time and then to reconstruct with a NURBS curve the whole trajectory (with some functions x(t), y(t), z(t) ). Or the same with an angle of an articulated structure.

I first thought of creating a NURBS curve with an OpenGL evaluator or even the GLU facilities, buth I could not find any tool to access directly the x(t), y(t), z(t) functions...

By any chance, do you know of any easy-to-use and well-established Java package that does such a job?

Thanks,
Manuel

Hello,
I have been told about Trident api:
http://kenai.com/projects/trident/pages/Home
It might well do the job
Manuel

Actually, I will use the following:

http://www.ee.ucl.ac.uk/~mflanaga/java/CubicSpline.html

Manuel