Thank you. Ah, Dijkstra’s algorithm. I didn’t twig to that; I always took it to mean that you would operate on distances already measured.
Neither; there’s no grid, just points stochastic on a two-dimensional plane, procedurally generated. I could PM you the repo in case you want to see what I’m up to: I have a very real tendency to be paralyzed or jettison a project whenever I feel I’ve overpromised or committed too much, so I would avoid announcing a project on the forum until a point when I feel the project has progressed enough to not make it vaporware.