[Haskell-cafe] Improving event management in elerea
kkwweett at yahoo.fr
Fri Aug 14 05:37:10 EDT 2009
> so you'd jump a huge amount in every frame. What I had in
can you explain, please ? I can't feel it when I play.
> something like this:
> ifte :: Signal Bool -> Signal a -> Signal a ->
> Signal a
> ifte sc st sf = (\c t f -> if c then t else f) <$>
> sc <*> st <*> sf
> And then:
> playerX <- integral playerX0
> ( ifte
> (lpress &&@ (playerX >@ pure (-fieldW))) (-1) 0
> + ifte
> (rpress &&@ (playerX <@ pure (fieldW-playerW)))
looks better indeed since there isn't a double signal anymore
> This won't be perfect, since the paddle can get a bit
> beyond the edge of
> the field. This can be prevented by using some kind of
> clamped integral,
or using some rounding as I did in my first implementation ?
> Also, note that mixing bind and return is redundant, since
> "f =<< return
> b" is equivalent to "f b".
yes, of course ! one of The laws, thanks !
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