[reactive] crayon - a 2D opengl curve renderer, with Reactive animations

[Peter Verswyvelen]

Good you used B-splines to model your road, since simple Bezier curves don't
have continuous curvature between segments, which results in all kinds of
trouble.
It's really great to see many bright people like you and Quicksilver working
on code like this. This is really something Haskell desperately needs IMHO
:)

2009/3/26 Patai Gergely <patai_gergely at fastmail.fm>

> > Maxim Shemanarev, the author of the open source anti-grain 2D rendering
> > engine, seems to have tackled the curve stroking (dealing with cusps etc)
> > pragmatically: <http://www.antigrain.com/mcseem/index.html>
> >   <http://www.antigrain.com/mcseem/index.html>
> >
> http://www.antigrain.com/research/adaptive_bezier/index.html#PAGE_ADAPTIVE_BEZIER
>
> I did something similar in my car racing game (currently under
> development, naturally in Haskell ;), where the track is defined with
> B-splines. I keep subdividing those parts where the cosine of the angle
> between subsequent segments is below a certain limit. I also found that
> by adding well-chosen textures, this limit--hence the polygon count--can
> be decreased drastically without any perceivable loss in quality.
>
> Gergely
>
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