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Re: Usage of UnsignedFixed type

Hi Brad, Hi Jan,

as I mentioned, I'm aware of Fix2Long (and also FixMath.h) . Unfortunately Fix2Long works only for positive numbers smaller than 32767, as it is limited by the signedness.
But the part of an UnsignedFixed is not the problem, as you just can shift by 16 bits (or divide by 2^16).

As Jan stated,  the macro

> #define Float64ToUnsignedFixed(f64SampleRate) ((UnsignedFixed)
> (((f64SampleRate) * 65536.0) + 0.5))

uses fraction. I missed, that the multiplication is done with floating point precision...

Therefore I suppose, you can calculate the fraction part of an UnsignedFixed with something like

#define FractionOfUnsignedFixed(f64SampleRate) (((Float64) ( (f64SampleRate) & 0xffff)) / 65536 )

Is that correct ?

Thanks,
Martin
 





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References: 
 >Usage of UnsignedFixed type (From: "Martin Wilz" <email@hidden>)
 >Re: Usage of UnsignedFixed type (From: Brad Ford <email@hidden>)



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