In article <3A51FFBF.89A0A30A@spiritone.com>, "Josh English"
<eng### [at] spiritonecom> wrote:

> 
> My bezier.inc file can do this in a very limited way:
> 
> http://www.spiritone.com/~english/cyclopedia/include/bezier.inc
> 
> And you would want to create a simple bezier spline by creating an
> array of four points
> 
> #declare RibbonA = array [4] { 4 vectors }
> #declare RibbonB = MoveSpline(RibbonA,some vector)
> 
> ConnectSmooth(RibbonA,RibbonB)

Thanks,   

But what about twists?

Maybe one spline to define one side of the ribbon and one spline to
control rotation?

         Mikkel

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