Re: Any more bugs/typos? Vladimir Nikishkin 17 Sep 2020 07:22 UTC

This is an optional procedure anyway.
The specification does not prohibit the implementation from
implementing proper Bezier curves.

"It is not an error to supply more than one <code>vecI</code>, but this
SRFI does not specify an exact behaviour." is what the latest draft says.

On Thu, 17 Sep 2020 at 15:14, Marc Nieper-Wißkirchen
<xxxxxx@nieper-wisskirchen.de> wrote:
>
> Am Do., 17. Sept. 2020 um 09:08 Uhr schrieb Vladimir Nikishkin
> <xxxxxx@gmail.com>:
> >
> > I can only respond with a quote from the ImageMagick manual:
> > "It is not recommended that you use more or less than 4 points per
> > 'bezier' curve segment, to keep things simple."
>
> But that's a limitation from ImageMagick (and possibly of the sample
> implementation). I don't think it makes sense to add this limitation
> in the specification itself.
>
> Bézier curves of high degree are (at least mathematically) no
> wizardry. They are a linear interpolation between two Bézier curves
> one degree less. On the Wikipedia page on Bézier curves, there is a
> nice picture ([1]) that shows how a quadratic curve is produced from
> interpolation by linear ones.
>
> --
>
> [1] https://en.wikipedia.org/wiki/B%C3%A9zier_curve#/media/File:Quadratic_Beziers_in_string_art.svg

--
Yours sincerely, Vladimir Nikishkin