I’ve been using your amazing book to teach myself Swift/IOS programming. It is as you say the perfect reinvigoration of programming joy!
However, I’m stuck on the weave overcell/undercell drawing. My drawing code has drifted from yours and I’m struggling to work out how to produce the weave look.
This link http://cl.ly/image/2c2u2M351Z1m is a fragment of one of mazes where 3,1 has an undercell http://cl.ly/image/1w2j1U1c3z0p as you can see I don’t get your weave, I just get two little horizontal dashes…
Can you just give me a two sentence guide, like “Overcells always have inset walls, but undercells have no inset.”. I’m sorry, I keep reading and re-reading your chapter, but I can’t quite see the trick for illustrating the weave…
Again, I love the book… I’m just a little stuck!