Mark Wagner wrote:

> 1) The function is constructed from a number of cubic polynomial pieces
> 2) The function is continuous
> 3) The first derivative of the function is continuous
> 4) The second derivative of the function is continuous
> 5) The function passes through all control points
> 6) The second derivative of the function is zero at the first and last
> control points

I can verify that cubic_spline in beta 11 meets these specifications.
Differences between splines through random 3D point sets produced by spline{}
and my lspline3 macro are too small to be noticed.


_____________
Kari Kivisalo

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