[Haskell-beginners] purely functional (non-monadic) alternativesfor Haskell animations in _The Haskell School of Expression_?

[Chaddaï Fouché]

2008/8/13 Bayley, Alistair <Alistair.Bayley at invesco.com>:
>> First, monad /= imperative
>> It is important to establish this distinction which doesn't seem to be
>> very clear in some minds...
>
> I think Matthias Felleisen probably understands this, but I could be wrong...
>

I think so too, but we're on Haskell-beginners and the formulation was
much too ambiguous to let it pass, I would prefer that beginners in
Haskell don't start with the idea that Monad are always imperative,
it's already too current a misunderstanding.

>
> I had a quick scan of the SOE source and it looks as though all of the graphics operations are in IO (). I don't see why you couldn't rearrange it so that describing shapes was purely functional, while rendering was still IO () (required by OpenGL, I assume), but it looks like it could be quite a bit of work.
>

That's unfortunate. Of course IO (or some FRP hiding the IO) is still
required to do the rendering, but it would be much nicer to split
those concerns.

-- 
Jedaï