Miscellaneous

ALLEGRO_PI

#define ALLEGRO_PI        3.14159265358979323846

#define AL_ID(a,b,c,d)     (((a)<<24) | ((b)<<16) | ((c)<<8) | (d))

typedef struct _DRIVER_INFO         /* info about a hardware driver */

C99 compilers have no predefined value like M_PI for the constant π, but you can use this one instead.

Last updated: 2009-11-29 01:41:10 UTC