10. "cost" RS-H -- Reeds & Shepp (build), B-Spline paper (search)
11. "goal zone" gz -- Use drivable of libbcar to check if goal found.
12. "steer" -- Use random control input for `steer1`, use R&S for `steer2`.
+13. "path optimization" -- Dijkstra algorithm, goal zone for interesting nodes.
+14. "sampling" -- uniform sampling in circle between init, goal (rad = edist)
[cute c2]: https://github.com/RandyGaul/cute_headers/blob/master/cute_c2.h
[K-d tree]: https://en.wikipedia.org/wiki/K-d_tree