ref: a7dab2728bde8eea68ddfdfadfad08a00b1f7c68
dir: /sys/src/games/timmy/fns.h/
void *emalloc(ulong); Image *rgb(u32int); Poly *mkpoly(int, ...); Poly *polydup(Poly *); void polytrans(Poly *, Poly *, double, double, double); void polydraw(Poly *, Image *, Image *, Image *); void polybbox(Poly *, Rectangle *); void polyfix(Poly *); Obj *mkobj(ObjT *); Obj *objdup(Obj *); void objcat(Obj *, Obj *); Vec vecadd(Vec, Vec); Vec vecsub(Vec, Vec); Vec vecmul(Vec, double); Vec vecnorm(Vec); double vecdist(Vec, Vec); double vecdot(Vec, Vec); Vec vecnormal(Vec); int objcoll(Obj *, Obj *); void freeobj(Obj *); void objexcise(Obj *); void addtray(ObjT *, ...); void physstep(void); int hinged(Obj *, Obj *); void copyhinges(Obj *, Obj *);