update cubing captions

1 files changed, 177 insertions, 177 deletions

diff --git a/2023/info/cubing-after.md b/2023/info/cubing-after.md
index cec619c1..6878ad92 100644
--- a/2023/info/cubing-after.md
+++ b/2023/info/cubing-after.md
@@ -86,183 +86,183 @@
 [[!template new="1" text="""So at this point the organizer should hopefully show""" start="00:03:49.240" video="mainVideo-cubing" id="subtitle"]]
 [[!template text="""a small video I've prepared, a one minute video showing how""" start="00:03:54.200" video="mainVideo-cubing" id="subtitle"]]
 [[!template text="""I actually use this to solve a cube and to time my solve.""" start="00:03:58.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template new="1" text="""Okay, so building this thing, there were several challenges.""" start="00:05:19.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""The first one was how do I even represent""" start="00:05:22.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""the state of a Rubik's cube.""" start="00:05:24.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For this there are many possible representations,""" start="00:05:26.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""no obvious best solution.""" start="00:05:29.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I did not, well, what helped me was that""" start="00:05:32.160" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I did not have to programmatically solve this thing,""" start="00:05:34.080" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""so I picked the easiest possible representation""" start="00:05:36.440" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""which is just an array of every single facelet.""" start="00:05:39.640" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For a 3x3 cube you have 9 facelets on one side,""" start="00:05:42.720" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""so times 6 sides you would have 54 elements in this array.""" start="00:05:46.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So with this representation, it's very simple,""" start="00:05:51.720" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but it's kind of weird to do scrambles with this.""" start="00:05:54.160" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""But otherwise, it worked very, very well.""" start="00:05:56.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""In the future, I plan to learn some group theory,""" start="00:05:59.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""pick a better representation""" start="00:06:01.720" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and do this in a much, much more elegant way""" start="00:06:03.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""without compromising speed too much.""" start="00:06:05.640" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Yes. Once I had the representation,""" start="00:06:12.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""the scrambling itself should not be too hard.""" start="00:06:15.160" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For this, it's important to consider that basically""" start="00:06:18.080" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""if you do a face turn""" start="00:06:22.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""you end up swapping some facelets with other facelets,""" start="00:06:23.600" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""that's the easiest way to think about this.""" start="00:06:26.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""To determine which one goes into which one's position,""" start="00:06:30.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""it was pretty confusing to figure this out.""" start="00:06:33.720" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For this I went through a few papers,""" start="00:06:36.922" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and I found one which suggested""" start="00:06:38.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""to just build a cube out of paper,""" start="00:06:40.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""number every facelet, and turn it""" start="00:06:42.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and keep track of which facelet moved into which position.""" start="00:06:44.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And programmatically, the `cl-rotatef` macro""" start="00:06:48.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""was very, very useful for doing this kind of""" start="00:06:51.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""in-place swapping you need for this operation.""" start="00:06:53.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So in the future, group theory would hopefully""" start="00:06:56.080" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""make this a bit less awkward.""" start="00:06:59.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Here's a photo of this paper cube I made""" start="00:07:02.440" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""along with a real cube. As you can see""" start="00:07:04.560" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""mathematically speaking, they are the same thing,""" start="00:07:08.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template new="1" text="""they just look very, very different.""" start="00:07:11.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So the scramble algorithm itself,""" start="00:07:13.720" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I pondered how this would even be done. In the competitions,""" start="00:07:18.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""They do this in a very, very elaborate way.""" start="00:07:23.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""They generate a random cube,""" start="00:07:26.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""they try to solve it, and if it's solvable""" start="00:07:27.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""they use these solution moves""" start="00:07:29.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""to turn into a scramble basically.""" start="00:07:33.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And they also make sure to canonicalize the moves,""" start="00:07:35.280" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""so if you have subsequent moves that can be simplified,""" start="00:07:39.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""they do simplify these as much as possible.""" start="00:07:43.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For example,""" start="00:07:45.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""if you have two subsequent rotations in one direction,""" start="00:07:45.680" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""it's turned into a different kind of rotation,""" start="00:07:48.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""so 90 and 90 equals 180.""" start="00:07:51.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And the other Elisp scramblers I looked at,""" start="00:07:53.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""they generate random moves.""" start="00:07:57.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Some of them do canonicalize. Not all of them.""" start="00:07:59.560" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""This one tries to do the best low-fi thing,""" start="00:08:01.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""that is, generating random moves,""" start="00:08:05.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""canonicalizing and repeating""" start="00:08:06.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""until enough have been generated.""" start="00:08:08.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template new="1" text="""For the visualization I had to figure out""" start="00:08:14.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""something else too complicated.""" start="00:08:17.600" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For this, I tried to figure out""" start="00:08:18.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""where every facelift would end up in the puzzle view""" start="00:08:21.680" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""when you would unfold it.""" start="00:08:24.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And for this, I did not consider the facelet orientation.""" start="00:08:25.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""This may be important later for some other puzzles""" start="00:08:30.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""where you can end up with very twisted faces,""" start="00:08:33.720" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but for simple cubes, it's not a problem.""" start="00:08:35.600" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""My initial prototype used colored text,""" start="00:08:37.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but later, I used the SVG library.""" start="00:08:40.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""It turned out to be easy enough to use, actually.""" start="00:08:43.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Currently, I have hard-coded face-color mappings,""" start="00:08:46.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but I plan to replace this so that theming is possible.""" start="00:08:50.560" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For example, if you happen to have a cube""" start="00:08:53.560" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""that does not have the same color mappings as I do,""" start="00:08:56.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template new="1" text="""then you should be able to fix this.""" start="00:08:59.141" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Next challenge was to build""" start="00:09:00.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""a beautiful intuitive UI with Transient.""" start="00:09:05.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""The reason why I chose this is""" start="00:09:08.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""because it would be self-documenting and Magit-style,""" start="00:09:11.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and everyone knows how Magit works basically.""" start="00:09:14.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Since Transient has become part of Emacs,""" start="00:09:16.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""there is really no reason to not try it out.""" start="00:09:19.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""The problem was documentation is difficult to understand.""" start="00:09:21.680" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""It's very abstract and high level,""" start="00:09:26.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and it's hard to figure out. "Okay,""" start="00:09:27.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I want to do something,""" start="00:09:30.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""how am I supposed to do this?"""" start="00:09:31.240" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I did find transient-showcase, which has lots of examples,""" start="00:09:33.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but they don't really feel finished""" start="00:09:37.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and not realistic enough.""" start="00:09:40.080" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""When I tried to use the package,""" start="00:09:43.520" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I got plenty of unhelpful error messages""" start="00:09:45.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""when using it incorrectly.""" start="00:09:47.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I did manage to figure it out,""" start="00:09:48.560" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but I plan to find more actual examples of it,""" start="00:09:50.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""to have an executable reference basically""" start="00:09:55.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template new="1" text="""and try to improve my use of it.""" start="00:09:57.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""For the book-keeping, I used SQLite.""" start="00:10:00.080" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""This is a very recent addition to Emacs,""" start="00:10:06.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""it only appeared in the current major version.""" start="00:10:09.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""It's still very early days.""" start="00:10:11.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I found some oddities, one of them turned out to be""" start="00:10:13.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""a bug in the transaction macro.""" start="00:10:17.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Like basically, if you do an SQL transaction""" start="00:10:19.280" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and an error happens, then every helper I found""" start="00:10:22.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""does a rollback on an error.""" start="00:10:24.640" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""But this one did not. It actually committed on an error,""" start="00:10:25.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and this was very weird to figure out.""" start="00:10:31.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I reported a bug. Eli was nice enough to send me a patch.""" start="00:10:34.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""We did some patch review,""" start="00:10:38.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and he ended up fixing it properly.""" start="00:10:39.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So yes, there's still a lot to be done there, and yeah,""" start="00:10:42.440" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""the API is very basic.""" start="00:10:50.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""You don't have convenience helpers""" start="00:10:51.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""like fetch the first row or fetch the first value""" start="00:10:53.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""or anything, but they're easy enough to write yourself.""" start="00:10:55.760" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And the biggest challenge with this bookkeeping part""" start="00:10:58.881" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""was figuring out a decent schema,""" start="00:11:00.821" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""like how to organize data correctly""" start="00:11:02.480" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""so that it would not be awkward to manipulate.""" start="00:11:04.600" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And with this, you can finally build a package""" start="00:11:06.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""that remembers its state properly""" start="00:11:10.200" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and don't have to run into foot guns""" start="00:11:11.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template new="1" text="""with Lisp-style serialization, deserialization.""" start="00:11:14.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So yes, that concludes it so far.""" start="00:11:17.080" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So what did I learn from this exercise?""" start="00:11:22.640" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Well, there are still plenty of packages""" start="00:11:26.640" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""for Emacs to be written.""" start="00:11:28.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""If you think everything you can think of""" start="00:11:30.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""or you need has already been written, well, guess what?""" start="00:11:33.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""No.""" start="00:11:35.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""These are still plenty of specialized things""" start="00:11:36.240" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""that could need your help.""" start="00:11:38.496" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""These cubes do not require advanced mathematics,""" start="00:11:41.240" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""contrary to what you may think.""" start="00:11:44.240" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Yes, you can apply advanced mathematics to them""" start="00:11:45.600" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""if you want to, but you don't have to.""" start="00:11:49.160" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""What surprised me about this is basically group theory.""" start="00:11:51.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I've heard of it before.""" start="00:11:55.440" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""It seemed to be a meme, basically,""" start="00:11:56.520" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""because it has been like mostly Haskell people""" start="00:11:58.280" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""being very excited about this""" start="00:12:00.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and it seemed kind of, like, divorced from reality, basically.""" start="00:12:02.640" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""But this puzzle, it actually proves that yes,""" start="00:12:06.960" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""it has its use.""" start="00:12:10.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""It definitely has.""" start="00:12:11.400" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""You just have to find the right problem matching it,""" start="00:12:12.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and yeah.""" start="00:12:15.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So yeah, once I understand it better,""" start="00:12:17.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""the topic, I expect to write better code.""" start="00:12:19.840" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""These new Emacs features, they work well enough.""" start="00:12:23.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""There are some rough edges.""" start="00:12:28.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""They definitely need more testing.""" start="00:12:30.360" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So please, please, everyone,""" start="00:12:31.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""if you write Elisp, please try SQLite or Transient""" start="00:12:35.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""or anything else that looks cool and shiny.""" start="00:12:39.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Report bugs.""" start="00:12:41.160" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Find ways to improve them, anything. And yeah,""" start="00:12:42.920" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I'm sure that if we do this,""" start="00:12:46.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""then Emacs will continue to get even better.""" start="00:12:49.320" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""So yeah, what's next for this package?""" start="00:12:52.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Well, I could... There are lots of obvious UI improvements""" start="00:12:56.240" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""and testing to be done.""" start="00:13:00.440" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I basically want to reach feature parity""" start="00:13:01.800" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""with the twisty-timer app, which this is very much inspired by.""" start="00:13:04.160" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I want nice-looking stats like graphical ones""" start="00:13:06.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""instead of just a simple list of times.""" start="00:13:11.120" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And I want support for more puzzles, of course,""" start="00:13:13.240" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""not just the simple cubes,""" start="00:13:15.680" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""but as I progress learning these puzzles,""" start="00:13:17.000" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""I want to have Emacs supporting me for this.""" start="00:13:19.040" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""But generally, it's a very open-ended package.""" start="00:13:22.520" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""And this concludes the talk.""" start="00:13:26.880" video="mainVideo-cubing" id="subtitle"]]
-[[!template text="""Thank you very much.""" start="00:13:31.080" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Okay, so building this thing, there were several challenges.""" start="00:05:15.240" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""The first one was how do I even represent""" start="00:05:18.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the state of a Rubik's cube.""" start="00:05:20.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this there are many possible representations,""" start="00:05:22.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""no obvious best solution.""" start="00:05:25.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did not, well, what helped me was that""" start="00:05:27.709" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did not have to programmatically solve this thing,""" start="00:05:29.629" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so I picked the easiest possible representation""" start="00:05:31.989" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""which is just an array of every single facelet.""" start="00:05:35.189" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For a 3x3 cube you have 9 facelets on one side,""" start="00:05:38.269" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so times 6 sides you would have 54 elements in this array.""" start="00:05:42.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So with this representation, it's very simple,""" start="00:05:47.269" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but it's kind of weird to do scrambles with this.""" start="00:05:49.709" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But otherwise, it worked very, very well.""" start="00:05:52.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""In the future, I plan to learn some group theory,""" start="00:05:54.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""pick a better representation""" start="00:05:57.269" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and do this in a much, much more elegant way""" start="00:05:58.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""without compromising speed too much.""" start="00:06:01.189" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Yes. Once I had the representation,""" start="00:06:07.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the scrambling itself should not be too hard.""" start="00:06:10.709" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this, it's important to consider that basically""" start="00:06:13.629" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you do a face turn""" start="00:06:17.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""you end up swapping some facelets with other facelets,""" start="00:06:19.149" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that's the easiest way to think about this.""" start="00:06:22.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""To determine which one goes into which one's position,""" start="00:06:26.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it was pretty confusing to figure this out.""" start="00:06:29.269" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this I went through a few papers,""" start="00:06:32.471" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and I found one which suggested""" start="00:06:34.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to just build a cube out of paper,""" start="00:06:36.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""number every facelet, and turn it""" start="00:06:37.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and keep track of which facelet moved into which position.""" start="00:06:40.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And programmatically, the `cl-rotatef` macro""" start="00:06:44.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""was very, very useful for doing this kind of""" start="00:06:47.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""in-place swapping you need for this operation.""" start="00:06:49.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So in the future, group theory would hopefully""" start="00:06:51.629" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""make this a bit less awkward.""" start="00:06:54.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Here's a photo of this paper cube I made""" start="00:06:57.989" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""along with a real cube. As you can see""" start="00:07:00.109" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""mathematically speaking, they are the same thing,""" start="00:07:03.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they just look very, very different.""" start="00:07:07.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""So the scramble algorithm itself,""" start="00:07:09.269" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I pondered how this would even be done. In the competitions,""" start="00:07:14.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They do this in a very, very elaborate way.""" start="00:07:19.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They generate a random cube,""" start="00:07:21.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they try to solve it, and if it's solvable""" start="00:07:22.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they use these solution moves""" start="00:07:25.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to turn into a scramble basically.""" start="00:07:28.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And they also make sure to canonicalize the moves,""" start="00:07:30.829" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so if you have subsequent moves that can be simplified,""" start="00:07:34.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they do simplify these as much as possible.""" start="00:07:38.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For example,""" start="00:07:40.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you have two subsequent rotations in one direction,""" start="00:07:41.229" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it's turned into a different kind of rotation,""" start="00:07:43.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so 90 and 90 equals 180.""" start="00:07:46.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And the other Elisp scramblers I looked at,""" start="00:07:49.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""they generate random moves.""" start="00:07:53.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Some of them do canonicalize. Not all of them.""" start="00:07:55.109" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This one tries to do the best low-fi thing,""" start="00:07:57.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that is, generating random moves,""" start="00:08:00.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""canonicalizing and repeating""" start="00:08:02.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""until enough have been generated.""" start="00:08:04.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""For the visualization I had to figure out""" start="00:08:09.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""something else too complicated.""" start="00:08:13.149" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For this, I tried to figure out""" start="00:08:14.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""where every facelift would end up in the puzzle view""" start="00:08:17.229" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""when you would unfold it.""" start="00:08:19.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And for this, I did not consider the facelet orientation.""" start="00:08:21.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This may be important later for some other puzzles""" start="00:08:25.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""where you can end up with very twisted faces,""" start="00:08:29.269" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but for simple cubes, it's not a problem.""" start="00:08:31.149" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""My initial prototype used colored text,""" start="00:08:33.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but later, I used the SVG library.""" start="00:08:36.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It turned out to be easy enough to use, actually.""" start="00:08:38.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Currently, I have hard-coded face-color mappings,""" start="00:08:41.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but I plan to replace this so that theming is possible.""" start="00:08:46.109" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""For example, if you happen to have a cube""" start="00:08:49.109" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that does not have the same color mappings as I do,""" start="00:08:51.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""then you should be able to fix this.""" start="00:08:54.690" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""Next challenge was to build""" start="00:08:56.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""a beautiful intuitive UI with Transient.""" start="00:09:01.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""The reason why I chose this is""" start="00:09:03.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""because it would be self-documenting and Magit-style,""" start="00:09:06.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and everyone knows how Magit works basically.""" start="00:09:10.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Since Transient has become part of Emacs,""" start="00:09:12.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""there is really no reason to not try it out.""" start="00:09:15.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""The problem was documentation is difficult to understand.""" start="00:09:17.229" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It's very abstract and high level,""" start="00:09:21.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and it's hard to figure out. "Okay,""" start="00:09:23.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I want to do something,""" start="00:09:25.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""how am I supposed to do this?"""" start="00:09:26.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did find transient-showcase, which has lots of examples,""" start="00:09:28.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but they don't really feel finished""" start="00:09:33.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and not realistic enough.""" start="00:09:35.629" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""When I tried to use the package,""" start="00:09:39.069" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I got plenty of unhelpful error messages""" start="00:09:40.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""when using it incorrectly.""" start="00:09:42.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I did manage to figure it out,""" start="00:09:44.109" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but I plan to find more actual examples of it,""" start="00:09:45.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""to have an executable reference basically""" start="00:09:50.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and try to improve my use of it.""" start="00:09:53.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""For the book-keeping, I used SQLite.""" start="00:09:55.629" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""This is a very recent addition to Emacs,""" start="00:10:01.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it only appeared in the current major version.""" start="00:10:04.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It's still very early days.""" start="00:10:07.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I found some oddities, one of them turned out to be""" start="00:10:09.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""a bug in the transaction macro.""" start="00:10:13.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Like basically, if you do an SQL transaction""" start="00:10:14.829" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and an error happens, then every helper I found""" start="00:10:17.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""does a rollback on an error.""" start="00:10:20.189" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But this one did not. It actually committed on an error,""" start="00:10:20.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and this was very weird to figure out.""" start="00:10:26.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I reported a bug. Eli was nice enough to send me a patch.""" start="00:10:29.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""We did some patch review,""" start="00:10:34.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and he ended up fixing it properly.""" start="00:10:35.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yes, there's still a lot to be done there, and yeah,""" start="00:10:37.989" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the API is very basic.""" start="00:10:45.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""You don't have convenience helpers""" start="00:10:46.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""like fetch the first row or fetch the first value""" start="00:10:48.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or anything, but they're easy enough to write yourself.""" start="00:10:51.309" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And the biggest challenge with this bookkeeping part""" start="00:10:54.430" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""was figuring out a decent schema,""" start="00:10:56.370" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""like how to organize data correctly""" start="00:10:58.029" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""so that it would not be awkward to manipulate.""" start="00:11:00.149" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And with this, you can finally build a package""" start="00:11:02.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that remembers its state properly""" start="00:11:05.749" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and don't have to run into foot guns""" start="00:11:07.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""with Lisp-style serialization, deserialization.""" start="00:11:10.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template new="1" text="""So yes, that concludes it so far.""" start="00:11:12.629" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So what did I learn from this exercise?""" start="00:11:18.189" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Well, there are still plenty of packages""" start="00:11:22.189" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""for Emacs to be written.""" start="00:11:24.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""If you think everything you can think of""" start="00:11:25.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or you need has already been written, well, guess what?""" start="00:11:28.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""No.""" start="00:11:31.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""These are still plenty of specialized things""" start="00:11:31.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""that could need your help.""" start="00:11:34.045" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""These cubes do not require advanced mathematics,""" start="00:11:36.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""contrary to what you may think.""" start="00:11:39.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Yes, you can apply advanced mathematics to them""" start="00:11:41.149" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you want to, but you don't have to.""" start="00:11:44.709" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""What surprised me about this is basically group theory.""" start="00:11:47.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I've heard of it before.""" start="00:11:50.989" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It seemed to be a meme, basically,""" start="00:11:52.069" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""because it has been like mostly Haskell people""" start="00:11:53.829" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""being very excited about this""" start="00:11:56.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and it seemed kind of, like, divorced from reality, basically.""" start="00:11:58.189" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But this puzzle, it actually proves that yes,""" start="00:12:02.509" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""it has its use.""" start="00:12:05.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""It definitely has.""" start="00:12:06.949" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""You just have to find the right problem matching it,""" start="00:12:08.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and yeah.""" start="00:12:11.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yeah, once I understand it better,""" start="00:12:13.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""the topic, I expect to write better code.""" start="00:12:15.389" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""These new Emacs features, they work well enough.""" start="00:12:18.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""There are some rough edges.""" start="00:12:24.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""They definitely need more testing.""" start="00:12:25.909" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So please, please, everyone,""" start="00:12:27.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""if you write Elisp, please try SQLite or Transient""" start="00:12:30.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""or anything else that looks cool and shiny.""" start="00:12:34.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Report bugs.""" start="00:12:36.709" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Find ways to improve them, anything. And yeah,""" start="00:12:38.469" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I'm sure that if we do this,""" start="00:12:41.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""then Emacs will continue to get even better.""" start="00:12:44.869" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""So yeah, what's next for this package?""" start="00:12:47.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Well, I could... There are lots of obvious UI improvements""" start="00:12:51.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""and testing to be done.""" start="00:12:55.989" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I basically want to reach feature parity""" start="00:12:57.349" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""with the twisty-timer app, which this is very much inspired by.""" start="00:12:59.709" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I want nice-looking stats like graphical ones""" start="00:13:02.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""instead of just a simple list of times.""" start="00:13:06.669" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And I want support for more puzzles, of course,""" start="00:13:08.789" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""not just the simple cubes,""" start="00:13:11.229" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""but as I progress learning these puzzles,""" start="00:13:12.549" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""I want to have Emacs supporting me for this.""" start="00:13:14.589" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""But generally, it's a very open-ended package.""" start="00:13:18.069" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""And this concludes the talk.""" start="00:13:22.429" video="mainVideo-cubing" id="subtitle"]]
+[[!template text="""Thank you very much.""" start="00:13:26.629" video="mainVideo-cubing" id="subtitle"]]