[music-dsp] lfo oscillator (saw or triangle) without branching

[Heine Gundersen]

a quick floor() replacement could be casting it to an int (truncating it):

phase = (int)(phase+inc);

  - Heine.

Andreas Sumerauer wrote:
> Hi,
> I was thinking about how to accellerate my LFO code (not antialiased of 
> course) and came up with this:
> 
> float lfo(float phase, float inc) // Triangular LFO with amp = 0.25
> {
>   phase = floor(phase+inc);
>   float res = fabs (phase - 0.5);
>   res += 0.25;
> }
> 
> I want to use the code inline and now I am searching for some quick and 
> dirty floor and fabs implementation. (or  are the functions inlined by 
> the compiler anyway? Then I could just leave it as it is - I am using 
> VC++ 2005 express BTW)
> 
> thanks for any comments
> 
> Andreas
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