"Skip Talbot" <ski### [at] aolcom> wrote:
> Is there a built in function that I'm overlooking that would allow me to
> compute a normal and tangent vector to a given point on a spline?  I saw
> that Chris Colefax's spline macro can do this but is there something I can
> use with POV's built in splines?  I'm looking at approximating the vectors
> by using adjacent points, but I was hoping there might be something a little
> more accurate.
>
> Skip

Would official support for this be too difficult? It would definitely extend
the usefulness of built-in splines.

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