ref: c43fe6ddcfe9b0c93572f0042267573e05361bef
dir: /app/path/dat.h/
extern Node *selected;
extern Node *start, *goal;
enum{
Pbfs,
Pdijkstra,
Pa∗,
};
extern int (*pathfn)(Node*, Node*);
extern int nscen, scenid;
extern int nodesz;
extern int showgrid;