On Sun, 22 Sep 2002 19:20:02 -0400, Chris Colefax quoth:

> Fidel viegas <fid### [at] artrecognitioncouk> wrote:
>> Is there any macro that supports hermite curves? Does povray support
> hermite
>> curves? And what are they really good for? Isn't cubic splines enough
>> to create any kind of smooth camera or object animation?
> 
> The term "cubic" refers to the degree of the equations used to calculate
> the spline path.  All the cubic splines (Bezier, Catmull-Rom, Hermite,
> Kochanek-Bartels) are just different ways of specifying the inputs for
> the spline, and it's not too difficult to perform conversions from one
> to another.

There's also a "natural cubic spline" type that can't easily be converted
to/from.  POV-Ray 3.5's "natural_spline" is a natural cubic spline.  The
"cubic_spline" type is a Catmull-Rom spline.

-- 
Mark

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