POV-Ray: Newsgroups: povray.advanced-users: Creating Circular walls (using prisms ?): Re: Creating Circular walls (using prisms ?)

POV-Ray : Newsgroups : povray.advanced-users : Creating Circular walls (using prisms ?) : Re: Creating Circular walls (using prisms ?)		Server Time 28 Sep 2024 18:56:50 EDT (-0400)

From: clipka
Date: 17 Sep 2010 17:37:50
Message: <4c93dfae$1@news.povray.org>

Am 17.09.2010 23:16, schrieb Kene:

> I suspected that. OK, is there a way to create a spline path that can be used to
> draw a prism of a particular radius or diameter. I can do trial and error and
> end up with an approximation but I was wondering if there is a way to get a
> mathematically precise method that can generate values for any radius or
> diameter.

There's no mathematically /exact/ way whatsoever to represent a circular 
arc with a finite sequence of cubic splines (and all splines in POV-Ray 
are effectively cubic splines or special cases thereof). Neither for the 
general case, nor for any specific case (except maybe pathological ones).

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