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On Wed, 12 Apr 2000 16:15:29 -0400, "Greg M. Johnson"
<gre### [at] my-dejanews com> wrote:
>Tor Olav Kristensen fixed one problem with my sinespline and then I saw
>that what I really needed was a CosineSpline!
Maybe you could use a cubic spline instead. Take -2*x^3+3*x^2 in the
region [0;1]. It has a minimum at [0,0], a maximum at [1,1], a point
of inflexion at [0.5,0.5] and is symmetric about [0.5,0.5] . Who could
ask for more? :)
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG e-mail : pet### [at] tagpovrayorg
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