Re[2]: [Gnash-dev] Coordinate system discussion cont'd

[Bastiaan Jacques]

On Wed, 7 May 2008, Udo Giacomozzi wrote:
> BJ> Actually, I think we should take the opportunity to resolve some
> BJ> ambiguity with regards to the word "world". In the renderer, I believe
> BJ> it's used to convert various coordinate systems (e.g. SWF def.) to renderer
> BJ> coordinates and vice versa.
>
> You mean AGG renderer, correct?
> Right, there's a world_to_pixel and pixel_to_world.

These are part of the render_handler base class and all renderers must
implement them.

> BJ> However, in libgeometry, I believe
> BJ> world means something different namely, in a Range2d world means "contains
> BJ> all possible points".
>
> I'd say "extended to infinity in all directions".

I think setInfinite() is a lot more descriptive than setWorld(). So we
can eliminate confusion there.

> BJ> So I'd definitely like to either clearly document the differences, or,
> BJ> even better, use world to describe only a single thing.
>
> I agree that we should remove (or rename) world_to_pixel and viceversa.

Okay, I propose we also rename Range2d::setWorld to Range2d::setFinite
(and related methods). That way, I think we'll have only one use for the
word "world", which is in the character class.

Bastiaan