[Haskell-cafe] announce: Glome.hs raytracer

[Henning Thielemann]

On Wed, 26 Mar 2008, Don Stewart wrote:

> jsnow:
>
>> -Is there a fast way to cast between Float and Double?  I'm using Float
>> currently, and the only reason is because that's what the OpenGL api
>> expects.  I'd like to be able to use either representation, but the only
>> way to cast that I've found so far is "float_conv x =
>> fromRational(toRational x)", which is too slow.
>
> I'd try realToFrac, which should be pretty much optimised away.

http://haskell.org/haskellwiki/Converting_numbers