I think pass two is intended to introduce additional regions of concavity (mostly by replacing straight lines), which in effect introduces a bunch of inflection points, helping creating the organic "spiny" feel, as opposed to a "bubbly" feel. Without it, the resulting caves look a bit more like if you spilled liquid on a waxy surface, and less like thorns.
If you go into the javascript and replace "for(let p=0;p<3;p++)" with "for(let p=1;p<3;p++)", and then re-execute the block in the console, you can generate run through a bunch of generations without step 2
Nothing in the description refers to individual neighbouring cells. All those numbers are counts -- if 0 to 2 of the neighbouring cells are rock, do this, etc.
You're talking about the post, or something in the source code?
In the post, it just counts how many of the 8 tiles are floor (which means 9 possibilities, including none of them). They aren't assigned index numbers.
Edit: ha, we all jumped on you. So now this is explained three different ways.
It sounds like the same algorithm described here:
https://www.roguebasin.com/index.php/Cellular_Automata_Metho...
I think pass two is intended to introduce additional regions of concavity (mostly by replacing straight lines), which in effect introduces a bunch of inflection points, helping creating the organic "spiny" feel, as opposed to a "bubbly" feel. Without it, the resulting caves look a bit more like if you spilled liquid on a waxy surface, and less like thorns.
If you go into the javascript and replace "for(let p=0;p<3;p++)" with "for(let p=1;p<3;p++)", and then re-execute the block in the console, you can generate run through a bunch of generations without step 2
All that work for some miscreant dwarf archeologist with a pick-axe (me) to show up and dig it to hell for a bunch of worthless glass.
This is my favorite kind of procgen blog post: here's what we did, and here's a little widget you can play with to see how it works.
You would also probably like this old post of mine:
https://journal.stuffwithstuff.com/2014/12/21/rooms-and-maze...
Oh wow. I had no idea this was based on cellular automata. It really does give a totally different feel versus the other sections of the dungeon.
Related, TNNT starts in 9 days (Nov 1), anyone can join the tournament.
https://tnnt.org/
I don't get the neighboring tile numbering. Is it like this?
What's the current cell?
A diagram would help
Nothing in the description refers to individual neighbouring cells. All those numbers are counts -- if 0 to 2 of the neighbouring cells are rock, do this, etc.
There’s no numbering, it just counts the neighbours. ‘0-2’ means zero, one or two neighbours.
You're talking about the post, or something in the source code?
In the post, it just counts how many of the 8 tiles are floor (which means 9 possibilities, including none of them). They aren't assigned index numbers.
Edit: ha, we all jumped on you. So now this is explained three different ways.
I always have a lot of respect for people who are really good at procedural generation