ref: d6be49085c76bbea87b7d7c61455b93883669bf1
dir: /dat.h/
#define Eg 9.81 #define PIX2M 0.001 #define M2PIX (1.0/PIX2M) enum { Stheta = 0, Spos, Svel, Sdeltax, Seta, SLEN, }; typedef struct Projectile Projectile; struct Projectile { Point2 p, v; double mass; };