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;
};