#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