So in the object reference for jit.gl.nurbs if says

"A NURBS is a mathematical model that lets you represent virtually any desired shape, from points, straight lines, and polylines to conic sections (circles, ellipses"

But i cant find any info anywhere on how to define something other than a plane!

Now I know I can draw a circle with jit.gl.gridshape for example but i dont seem to be able to feed this into the matrix effectively.

Im trying to adapt the the pool_3d_nurbs example from the jit examples.

Can anyone tell me –

a) how to define a circle into jit.fill
or
b) how to use jit.gl.render within the pool nurbs example

Thanks