[Haskell-cafe] Re: [Haskell-beginners] Re: Accounting Engine in
stephen.tetley at gmail.com
Thu Jun 17 15:12:04 EDT 2010
On 17 June 2010 19:58, Stephen Tetley <stephen.tetley at gmail.com> wrote:
> Area, I'm not sure about. Maybe you **good** integrate the function
> through a space, but this might not be a good idea.
Ahem, swap 'good' for 'could' in that bit...
Antony Courtney used a dual representation for his vector graphics
program - Haven. Images were both a "colour characteristic function"
and proper/plain characteristic function for regions. I think this was
so that "point in polygon" calculations could be made easily.
type Image = (Point -> Color, Region)
Perhaps, it might not be too much of a stretch to model regions both
with a characteristic function and a more concrete representation that
allows area to be taken more easily. The region combinators would
become more complicated though.
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