Re: Backend and non-backend (was Re: Stencil bounding box)

[David Feuer]

On 5/2/06, Han-Wen Nienhuys <address@hidden> wrote:

> There are various ways of comparing numbers. The point is that you need
> to know which pairs of numbers/rectangles/etc. to compare. For that, you
>   need to get the elements in a canonical order, and that *must* be done
> with discrete quantities. Some possibilities

I don't understand why it has to be done in a canonical order, rather
than looking for the closest match for each element.

> for the actual distance function, there are a lot of possibilities.
> You'll probably need to experiment what works best.

If we're looking to measure small changes, area of union minus area of
intersection, divided by the area of the union, would probably be
good.

> BTW, brainwave: if we can localize the discrepancies by their bounding
> boxes, we could annotate the EPS files with glaring red circles that
> mark the differences!

That's beautiful.

David