Re: [Flightgear-devel] Radio frequency range: min/max/wrap

[Julian Foad]

Norman Vine wrote:

This is the poor man's version taken from sg_inlines.h

// normalize a value to lie between min and max
template <class T>
inline void SG_NORMALIZE_RANGE( T &val, const T min, const T max ) {
    T step = max - min;
    while( val >= max )  val -= step;
    while( val < min ) val += step;
};

That's effectively what we have (or had).

A proper version needs to be based on Interval Arithmetic we could just snag a subset of the scalar functions from an existing package http://www.ti3.tu-harburg.de/~knueppel/profil/docu/Profil.texinfo_19.html

Er ... we are not trying to do arithmetic on intervals. We are just incrementing and decrementing a scaler value within an interval.

- Julian



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