Re: [Algorithms] Converting floats to a specific range

[Oscar F. <os...@tr...>]

Unless I'm being daft isn't it just:

x = fmodf( 1.0f + fmodf( f, 1.0f ), 1.0f );

?

And btw 1.0 IS a power of 2.  2^0 in fact ;)

On 7 May 2010 12:36, Zafar Qamar <zaf...@co...> wrote:

> Hi,
>
> I'm sure this problem is pretty simple, but here goes...
>
> I have a set of float numbers that I'm trying to auto-wrap within a
> specific range of 0.0 to wrapSize (wrapSize is positive, and not a power of
> 2)
>
> So, if I choose a wrapSize of 1.0 then I want the following to happen when
> I feed in numbers...
>
> -739.8 --> 0.2
> :
> :
> -1.1 --> 0.9
> -1.0 --> 0.0
> -0.9 --> 0.1
> :
> -0.2 --> 0.8
> -0.1 --> 0.9
> 0.0 --> 0.0
> 0.1 --> 0.1
> :
> 0.9 --> 0.9
> 1.0 --> 0.0
> 1.1 --> 0.1
> :
>
> Can anyone think of a bit of maths for this please? Note that it needs to
> work for any positive value of wrapSize (not just 1.0)
>
> Cheers
> Zafar
>
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