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I love lenticulars. I'm working on writing my own lenticular software right now. You can see some of my lenticular math art here: https://gods.art/


When I click on a piece of art on your website it takes me to a page with an unhappy face and a message that says "No video with supported format and MIME type found".

Using Firefox 129.0.1


It's a MOV tagged as video/mp4. For me, FF recognizes only the audio part but if extracting the raw video URL I can play it with vlc.


It's funny seeing this after the arguments in the mpv thread a few days ago[1] where over if VLC's extra bloat (and lack of features like stepping back a frame) is justified by it coping with diverse formats. This file doesn't play correctly for me in mpv[2], but does fine in VLC.

[1] https://news.ycombinator.com/item?id=41277014 [2] https://imgur.com/TeL4sfq


They're the same thing. The problem is not the container, it's the H.265 encoded video which Firefox doesn't accept. It's not a good idea to throw raw cell phone video onto a website, first because it probably won't play everywhere, and second because there's embedded high-precision location data.


Thanks for the bug report.


I like how you chose the content of drawing so that it's complemented by lenticular effect instead of fighting against it. In many typical lenticular pictures that attempt to show an animation or 3d effect, there are angles in which you partially see two images thus ruining the picture by making it look blurry/striped. Not sure if it looks equally good in real life, but at least in the videos of your art the color gradients seemed to produce much smoother transition, which doesn't break the picture even when you partially see two consecutive frames.


Yes, if you want to do good lenticular art, you want nice smooth transitions (on a pixel-by-pixel level).


These are amazing - I'd love to buy one, if you are selling your art. Though shipping to the UK and import tax would probably make this prohibitively expensive.


I am selling. I can be contacted at caleb@gods.art. I'm really not sure how much shipping/tax would be to UK (never sold internationally).


Those are amazing! Are you hand aligning those lenses on the print or is there some sort of tooling/hardware/service that is capable of it?


Hand aligning is the only way I know of.


Any chance you could share the math behind the pixel snowflakes?


I did some experiments creating lenticular 3D and failed miserably. I'll look at what you got.

I would love to see the software, BTW.


I’d love to know more about the floating exclamation mark in one of those pictures you’ve linked to


I just walked into the room and that was there. After some examination, I realized it is a projection of the forest behind our house shining through a crack in the window.


I love the Give and Take one.


those look great, you should post a Show HN about them. I'd be interested to know more about your process if you're comfortable sharing.


Hexagonal Jewel Tunnel looks like a hyperdrive into space


Amazing work!


Pretty sure lack of sun is the primary extinction causing event.


Not it itself. A famine is.


Lichtenstein would agree.


What is your single favorite carabiner - like if all others were going to be destroyed and you could only use one for the rest of your life?


They're expensive but I'm a big fan of the Magnetron series by Black Diamond. Self locking yet quick to open, but most importantly for me they don't jam up with sand like the screw lock/twist lock ones when I'm canyoneering.


From a climbing standpoint? Either the Black Diamond Hoodwire (now discontinued, and I'll guard my stock with my life) or any member of the Black Diamond Rocklock family tree.

From a general usage standpoint, Trango used to make a wiregate called the Classic Wiregate. It wasn't as easy to clip as the Hoodwire, but it was more symmetric, so you could use it for carabiner brakes and things of that nature. It was my go-to utility carabiner, but since it wasn't as flashy as crabs meant specifically for the rope end of a quickdraw, it never sold well enough and so they took it off the market. Turns out that a purely functional, no-frills carabiner couldn't compete with objectively worse carabiners (the Black Diamond Light D, or ugh the Omega Pacific Doval) because it didn't look as "classic".

Many manufacturers make terrifyingly small full-strength carabiners, but my experience with them is that they are so small that they're difficult to operate, so I have a surprising number of effectively keychain carabiners that are actually rated for climbing usage.

Sidebar, for life-saving equipment, climbers are bizarrely obsessed with how cool things look. The parenthetically mentioned Doval was a terrible carabiner, but it looked kind of neat, like a classic car with modern influences. It had an ovalized exterior, but a D-shaped interior, so it had all the clippability problems of an oval carabiner (can you determine where the gate's axle is, purely by feel, in under a second? not on a smooth oval carabiner), while maintaining the D's principle weakness (and why oval carabiners remain popular): under bodyweight and higher loads, a nearly-correctly positioned d-shaped carabiners will shift into the correct position, leading to a nerve-wracking drop. Oval carabiners will not do this under bodyweight loads (but also might not when faced with higher loads, somewhat compromising their ultimate strength, which is, because of the design, also somewhat lower than a d-shaped crab). When hanging on really tenuous anchors, that little drop has caused said anchors to fail, so direct-aid climbers have favored oval carabiners, even though they tend to be objectively worse carabiners in every other respect.


The Petzl Am'D Ball-Lock[1] is the best locking carabiner I've encountered in the last decade of climbing.

1: https://www.petzl.com/US/en/Professional/Connectors/Am-D


I'm not a climber but I love the Omega Pacific D non-locking carabiner, it's size and shape makes it fit through molle webbing on Goruck backpacks nicely so it sits flush and is a convenient place to attach random things as needed.


A steel oval auto locking keylock 38kN carabiner. (https://www.amazon.com/PETZL-OXAN-Carabiner-Black-Triact-Loc...) Very strong, fails gradually, optimal loading and alignment, secure, doesn't catch on things, wide enough for most uses.


This is yesterday's entry on a journal-style novel I am writing. This post is a footnote in the book, so I thought it'd be kind of cool to post the entry on this thread...

Entry 77 - 2024-06-19 - Superintelligence ===========================================

A company just launched called "Safe Superintelligence Inc." I saw their announcement on Hacker News [foodnote 1], a hacker forum I participate in from time to time (too often actually - it's and old school form of social media, so it has its addictive qualities too). I was reading some of the negative comments (saying its impossible). I'm not sure what the outcome will be... but a thought occured to me while thinking about what might be possible - what people might be capable of. The thought was that it is interesting how people look roughly the same. Most adults are between 4 and 6 feet tall. Between 1 and 300 pounds. Etc. I mean, there's a lot of variety to human bodies, but they largely look similar when comparing to gorillas or lizards, etc. But the thing is - that's just their physical bodies. In reality, people are wildly different if you could see them in their full form. For example, the power which a billionaire can wield in the world is ridiculously larger than most people. You can see some of these guys with their super yachts - if fish, or birds saw these super yachts, they would think those are creatures have much larger bodies than most humans they see swimming or paddleboarding in the water.

    But people are wildly different in many dimensions. Buying power is just one. Another dimension is intelligence. Another is creativity (or are intelligence and creativity the same?).


    It's easy to see people doing what for you would be impossible, and to assume it must be impossible for everyone. The idea that scientists can derive an understanding of subatomic particles seems completely impossible to most people (myself included). "How can they know that?" is a question Whitney has asked me many times when I've shared various scientific discoveries. Fair question. Yet there are people over in Switzerland ripping the fabric of matter apart at the LHC.


    The other big factor, is that people together are capable of what is absolutely unthinkably impossible for an individual. When Whitney and I were in Savannah a couple weeks ago, we were hanging out in a cathedral, and I said something that came to mind: that this place could not possibly be built by a single individual. The existence of the cathedral implies that there is a power higher than that of a single individual human. When I saw some of the huge container ships leaving and arriving at the Savannah river harbor, the thought kept occurring to me that their existence is an amazing testament to the power of humanity. And we only have such power in collectives. The power of humanity comes due to our ability to work together. We can specialize, and thus go so much farther than it is possible for a person on their own to go. And we can discover and build what is unthinkable for a person working alone.


    It's strange how the collective is smarter and stronger than the individuals. This is part of God. There is a higher power.
[Footnote 1: https://news.ycombinator.com/item?id=40730156]


Water flows uphill all the time - all you need is an Eddy (https://en.wikipedia.org/wiki/Eddy_(fluid_dynamics))


The practical way to get water to flow uphill is of course the https://en.wikipedia.org/wiki/Siphon - always amazing in its own way.


Which works in a vaccum as well.

(Periodic Videos): <https://www.yewtu.be/watch?v=8F4i9M3y0ew>


I was just going to say, go to the beach. It's wind rather than steam providing the motion, but similar.

Watch the waves roll up the sand slope!


I'm a wave fanatic. Shameless plug for my wave-oriented art: https://gods.art


These are awesome, I love “Give and Take”,

I’m a computational chemist, you should have a look at Kohn Sham orbitals and google images “the hydrogen wave function”

I will reach out to you for a commission


Thanks. I actually have one piece which strongly reminded me of the wave orbitals: https://gods.art/math_videos/prism_eye_video_near_spoke4.htm.... Surprisingly, the orbital-like shapes were a surprise to me that came out of a wave interference experiment.


Rad stuff!


An interesting hexagonal-grid-based cellular automata I came across while building towards a water simulation.


I recently was required to renew my glasses prescription because the other one was 2 years old (so considered expired). When I got my new prescription, my optometrist said "your vision improved". I have been spending more time outside. I have found that time on the water seems to make my vision improve. I also suspect that walking through forests and experiencing the parallax effect might function as something like a depth perception calibration. It's also worth noting that I do wear glasses, but not all the time - intentionally so I can exercise my eyes.


Or, if your myopia wasn't too bad and you're in your 40s, that could just be related to presbiopia. That's what seems to have happened to me, and what the ophtalmologist I was seeing when I was a teenager told me might happen.


It's the dopamine interaction of the retina receiving outdoor lighting which changes things.

I don't think this works on astigmatism though.


Why would your eyes care about dopamine? Is it because the optic nerve is part of the brain?


The entire retina is part of the CNS, aka “the brain”. The optic nerve is therefore part of the brain.

There are dopaminergic amacrine cells within the retina and dopamine receptor much more widely.

Here is a reference with some of original citations:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2865197/#R36


This is cool, thanks for sharing!


A cursory googling led here:

> Dopamine is a key neurotransmitter in the signaling cascade controlling ocular refractive development, but the exact role and site of action of dopamine D1 receptors (D1Rs) involved in myopia remains unclear.

[.. snip ..]

> Therefore, activation of D1Rs, specifically retinal D1Rs, inhibits myopia development in mice. These results also suggest that multiple dopamine D1R mechanisms play roles in emmetropization and myopia development.

https://www.jneurosci.org/content/43/48/8231


This may be a silly question but were you spending the time outside with or without your glasses on?


Let us know when you have 2020 vision again.


While I can see this altering your prescription why should it improve your vision?


Isn't prescription going down the same thing as vision improving?


No, there are two separate things:

1) Your prescription.

2) What your vision is like with the best correction.


Then I'm guessing calebm misremembered what the optometrist said. Probably the optometrist said "your prescription improved" or "your prescription decreased".


"Vision improved" is a possible result of treatment. My wife has had cataract surgery--her vision in that eye certainly improved!

It also is possible to have your vision improve without treatment. I have some astigmatism, it's simply impossible to fully correct. My prescription changes a lot, it's possible for the astigmatism to be a bit less of an issue on a particular exam to the point that the best line I can read sometimes changes.


Any research on this?


I published an open-source tool several years ago which helps map out the wifi world: https://github.com/calebmadrigal/trackerjacker.


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