the graph versus grid debate rages (in my head). this is structurally a graph with proper links and everything, not just relying on implicit 'neighbors'. but most of the things i want to do with it are grid-like, and i'm currently just using weights to make the lines avoid blocks rather than removing graph nodes. really want to slim down the graph and highlight good routes with skipped grid squares, but that's probably after everything else is done.

starting to take shape, integrated the official MTA line colors for lines today. still many many things to do 😂 🚇

look, a* routing! it took me like maybe 6 hours to get all the other concepts right and then a half hour to implement routing. everything is always data structures

programming can be fun (for a few hours on the weekends and mornings and evenings as long as you don't think about the outside world at all and stay focused and make some progress)