Re: why are circles often represented as two arcs

On Wed, 2019-02-13 at 15:26 -0800, Bryce Harrington wrote:
> On Wed, Feb 13, 2019 at 11:15:41AM +0100, bryan rasmussen wrote:
> > As per the subject line I often notice that what comes out of
> > inkscape and
> > other svg capable editors uses paths to represent circles and other
> > simple
> > shapes. I suppose this is for some reason of code optimization (i.e
> > code
> > optimization in the editor not in the output SVG).
> > Can anyone shed any light on this?
> 
> Yes, in vector graphics Bézier curves are a wonderful generalized way
> to
> create shapes.  Once you have the code to do them, all the other
> shapes
> can just use the same rendering code if you represent them the same
> way.
> 
> The way the SVG specification is written, I'm not surprised that
> other
> SVG editors also use paths for representing basic geometrical shapes.

If you use Inkscape's ellipse tool, the SVG representation will use a
<circle> element if it is truly a circle, an <ellipse> element if it is
an ellipse, and a <path> element if it is pie shape or a partial
circle/ellipse. The SVG 2 standard does prescribe a standard way to
decompose a circle and an ellipse into paths, mostly for positioning
markers, dashes and text on a path.

Tav


> Bryce
> 
> 
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