"Warp" <warp [at] tagpovrayorg> a écrit dans le message de news: 
47ff5d1b@news.povray.org...
>
>  POV-Ray doesn't offer internally any such approximation feature. If you
> need it, you'll have to create the necessary SDL code yourself.
>
I think it is implemented in Chris Colefax's spline macros

http://www.geocities.com/ccolefax/spline/index.html

Marc

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