On Saturday 13 September 2008 10:49:54 James Turner wrote:
> I'm getting more and more encouraged to write a set of course and
> bearing helpers to deal with the normalisation and differencing. I've
> lost count of the number of times I've seen the:
>
> if ( az1 > 180.0) az1 -= 360.0;
> if ( az1 < -180.0) az1 += 360.0;
>
> Idiom repeated in the code, and lots of classes already have helpers
> for this - the KLN-89b and Mk-VIII, for example. Maybe there's some
> standard ones in SimGear I haven't spotted yet?
There is
// 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;
};
in simgear/sg_inlines.h
--
Roy Vegard Ovesen
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