ref: dfb8bd8c95a5ff8633214f483f358d24071a7d8a
dir: /dat.h/
#define FPS2MS(fps) (1000/(fps)) typedef struct GameState GameState; typedef struct Derivative Derivative; typedef struct Conn Conn; struct GameState { double x, v; }; struct Derivative { double dx, dv; }; struct Conn { int *fds; ulong off; ulong cap; };