Re: [Algorithms] Converting floats to a specific range

[Zafar Q. <zaf...@co...>]

Cheers for your responses. And for the comedy one :)

A couple of interesting ways of achieving the solution there.

Much appreciated
Zafar


-----Original Message-----
From: Chris Jenner [mailto:Chr...@ub...] 
Sent: 07 May 2010 12:57
To: Game Development Algorithms
Subject: Re: [Algorithms] Converting floats to a specific range

float wrap(float x)
{
	Const float wrapSize = 1.0f;

	Return x - floorf(x/wrapSize)*wrapSize;
}

-----Original Message-----
From: Zafar Qamar [mailto:zaf...@co...] 
Sent: 07 May 2010 12:36
To: Game Development Algorithms
Subject: [Algorithms] Converting floats to a specific range

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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