[reactive] First draft of reactive-tetris

[Peter Verswyvelen]

My colleague Thomas Davie was playing with your Tetris game, and it seemed
that it contained a space leak; it was consuming more memory, slowly.
Could it be caused by the top level

testTicks :: Event () testTicks = levelToTicks 1

I'm not sure how Events are implemented in Reactive, but in a classical FRP
setting the "heads" of this top level variable would never get garbage
collected.

2008/11/17 Creighton Hogg <wchogg at gmail.com>

> Hey Reactive,
> Since I have no hosting space I'm actually going to include the
> implementation as an attachment all in one file.  It's not very long anyway,
> so it should be alright.
>
> A few caveats:
>
> This code is still _really_ ugly, but it does work as far as I've tested
> There is no game over, you need to quit manually
> There is no score or level adjustment yet.  I need to add that when I have
> more time, i.e. after this week
>
> That being said, my first real reactive program was surprisingly simple
> once I got comfortable with the semantics.  The actual reactive code isn't
> that complicated, but it did take a pretty big shift in thinking from
> writing explicit game loops.
>
> I've included a good bit of comments so it hopefully it isn't too hard to
> follow, but if there are any questions about why I did something a
> particular way (the answer may be 'I'm dumb') please e-mail me or find me on
> #haskell.
>
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>
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