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Re: Circles
From: |
Werner LEMBERG |
Subject: |
Re: Circles |
Date: |
Thu, 11 Aug 2022 06:19:55 +0000 (UTC) |
>> There's a lot of oldish webpages with complex Bezier curve
>> constructions for circles.
>
> Those must be approximate constructions. It is not mathematically
> possible to construct a Bézier curve which is at the same time an
> exact circle.
Well, Metafont uses a third-order Bézier approximation to build up
circles (from four quarter circles). However, the Metafont book says
that the difference to a real circle is less than 0.06%, which is thus
imperceptible.
The same holds for PostScript-based fonts.
Werner
- Circles, Andrew Bernard, 2022/08/10