SharkD <mik### [at] gmailcom> wrote:
> Is there a function in POV that will allow me to automatically take the 
> derivative of another function?

  Calculating the derivative of a function analytically is not trivial
and has such low demand that povray obviously doesn't offer such a thing.

  A numerical approximation could be easier, but still the demand is so
low that no such luck.

  But I think the user-defined functions are expressive enough for you to
do it in SDL.

-- 
                                                          - Warp

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