Re: [Lib2geom-devel] Question about the lib2geom coordinate system.

[mgsloan <mg...@gm...>]

On 4/16/07, MenTaLguY <me...@ry...> wrote:
>
> On Mon, 16 Apr 2007 14:04:46 -0700, "Sunburned Surveyor" <
> sun...@gm...> wrote:
> > I know that SVG uses a coordinate system in which the "X" or "northing"
> > coordinate value increases as you move "down" the screen or page. Is
> this
> > the coordinate system that lib2geom uses, or does the library employ a
> > more typical coordinate system in which the "X" or "northing" coordinate
> value
> > decreases as you move "down" the screen or page.
> >
> > If lib2geom does not use the SVG coordinate system, does it provide code
> > to do the translation?
>
> The short answer is that (ideally) nothing in lib2geom really cares.  The
> ultimate interpretation of the coordinate system is up to the client.
>

Yeah, I've gotten in trouble for making methods like cw (clockwise) and ccw
(counter-clockwise) before, as these would imply a particular coordinate
system (or at least, the desired behavior varies depending on your view of
the coord sys).