[Freeciv-Dev] Re: patch: nicer rand_neighbour()
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> Sure, but, frankly, yuck. And it doesn't allow (conveniently) using
> the myrand(5) method for y limits. Better would be a patch providing
> general macros or functions doing something similar to this. And make
#define rad2y(r) ((r)&3?((r)&4?1:-1):0)
#define rad2x(r) rad2y(((r)+2))
#define rad2by(r, y) rad2y(((((y)&&(y)!=map.ysize-1)?(r):((r)%5)))+((y)?0:4))
#define rad2bx(r, y) rad2x(((((y)&&(y)!=map.ysize-1)?(r):((r)%5)))+((y)?0:4))
Yuck! :)
Regards,
I.Q.
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