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Using the moiré effect to show different arrows to each observer (2018)
- hammock 2y agoHow far can this be taken? Can you create a lenticular-type image with this? Can you use a variable moire effect to create motion graphics?
- taejo 2y ago> Can you use a variable moire effect to create motion graphics? Yes! https://www.creativebloq.com/animation/moire-effect-book-71412358 https://www.creativebloq.com/animation/moire-effect-book-714...
- hyperific 2y agohttps://actu.epfl.ch/news/harnessing-the-moire-effect-to-make-transparent-im/ https://actu.epfl.ch/news/harnessing-the-moire-effect-to-mak...
- msk-lywenn 2y agoBuenzli/Demodays OHP (overhead projetor) competition has many of those https://www.youtube.com/watch?v=6G5rTavyx7A https://www.youtube.com/watch?v=6G5rTavyx7A https://www.youtube.com/watch?v=AZ39obFzaQs https://www.youtube.com/watch?v=AZ39obFzaQs https://www.youtube.com/watch?v=LCIsIfEOEI8 https://www.youtube.com/watch?v=LCIsIfEOEI8
- IshKebab 2y agoThat's equal parts hilarious and impressive. At least the first one. Some of the others were hilarious and embarrassing: https://youtu.be/LCIsIfEOEI8?t=134 https://youtu.be/LCIsIfEOEI8?t=134
- nicd 2y agoThis also reminds me of Lumii (now Fathom), which is an MIT media lab spin-out that prints multiple inkjet layers to create a 3D effect: https://www.inkworldmagazine.com/contents/view_online-exclusives/2018-04-12/lumii-creates-3d-imaging-using-2d-printing/ https://www.inkworldmagazine.com/contents/view_online-exclus...
- dahart 2y agoTons of interesting applications https://en.wikipedia.org/wiki/Moir%C3%A9_pattern#Implications_and_applications https://en.wikipedia.org/wiki/Moir%C3%A9_pattern#Implication... I saw a good talk a couple decades ago where the speaker clued us into how with moire interference patterns, translation of one pattern turns into translational motion of the interference pattern that is 90 degrees offset (e.g., move one grating to the left/right, and the result moves up & down), and a rotation of one grating against another becomes scaling of the resulting pattern. He had lots of neat examples of animation, hidden designs, magnification, moving text, morphing images, etc. I couldn’t find a link immediately, but he was working on a textbook explaining the theory of generalize Moiré patterns. With just a little searching, I do see lots of that kind of stuff describing mathematical and perceptual properties and various uses of Moiré effects.
- diggan 2y agoWhat's the difference between the Moire effect and "Lenticular printing"? https://en.wikipedia.org/wiki/Lenticular_printing https://en.wikipedia.org/wiki/Lenticular_printing The effect seems to be very similar, but the Wikipedia page I linked doesn't describe itself as using the Moire effect.
- downboots 2y agoIn Moire patterns the lines are not parallel (they don't even have to be lines), and there is no lens. But now I'm tempted to combine the effects.
- 2muchcoffeeman 2y agoMoire effect is the result of 2 (or more I guess) similar regular, repeating patterns laid over each other but with a small delta. Over a small section of the pattern, the patterns will mostly line up. But over a larger sections, you’ll see that some parts will over lap. An example of this is would be to get 2 meshes. And place one mesh slightly behind the other. You can hear the result too. A common way to tune a guitar relative to itself is to play one string open, and then play the same note on a different string. You’ll hear this beat that is not the note because the frequencies are close but not quite.
- cwillu 2y agoThis is more or less how airport glide slope indicators work.
- dublinben 2y agoThis is nothing but blogspam of the embedded Tom Scott video: https://www.youtube.com/watch?v=d99_h30swtM https://www.youtube.com/watch?v=d99_h30swtM. This article adds nothing that is not already included in the video itself.
- jimmaswell 2y agoIt is nice to get a good gist without committing to a video sometimes.
- lisper 2y agoUnless is a Tom Scott video. Those are almost always worth the investment.
- serf 2y agosome people just don't watch youtube. someone that's a quarter-of-the-way proficient at speed reading can read a short article like this in seconds -- without the time investment or the need to buffer video data to read the transcript. every media has a place, generally speaking the trivia and background included in a YT video is interesting -- but in the end it's Jeopardy answers and brain-candy for me 90% of the time.
- poincaredisk 2y agoI never watch videos. I don't like it, and overall I consider that a waste of time that could be better spent reading.
- omoikane 2y agoI use the "show transcript"[1] function for that. [1] In the web (desktop) version of youtube, if you expand the description, there is a "show transcript" button near the bottom. Not sure about mobile or other versions.
- planetpluta 2y agoI appreciate being able to quickly skim an article rather than watch a video - especially when in public without headphones!
- mattyturner 2y agoI used to walk past that very same light from time to time and wonder what it was used for around 20 years ago. Thank you internet/HN!
- xipho 2y agoThere is an concept in this video that perfectly encapsulates why taxonomists (in this case those who describe Earth's biodiversity) are so critical, and why their work has the impact it does. The exercise is left to the reader...
- thih9 2y agoRelated, “An Evaluation of the Inogon Leading Mark”[1]: > Responses from the field evaluation were generally negative, mostly because the device was perceived to have too short a detection range for the Constable Hook Channel. It is recommended that the device be considered as a candidate range light for very short range applications. [1]: https://apps.dtic.mil/sti/citations/ADA168108 https://apps.dtic.mil/sti/citations/ADA168108
- cypherpunks01 2y agoWhen a grid's misaligned With another behind That's a moiré
- dredmorbius 2y agoCredit where due: <https://www.xkcd.com/1814/ https://www.xkcd.com/1814/>
- red_admiral 2y agoThe older way of doing this is simply to have several pillars in line, each one a bit higher up than the previous one as you move away from the shore. I think they're usually painted white with a red band or something. From a ship, if you see the pillars in a straight line ahead of you, you're in the channel; if the rear pillar is to the left of the front one from your viewpoint you're too far left. The vertical version of this is the visual approach indicator for aircraft: red and white pairs of lights with flaps at different angles so that if you're too high, you see all white, and if you're too low all red. On the exact glide path you see both red and white.
- stn8188 2y agoThis is the method I've always seen here in the US, where we call them range lights [0]. There are lights for night alignment and striped boards for daytime. Many years ago I used to maintain these systems in the Caribbean and the Long Island Sound with the US Coast Guard. [0] https://en.m.wikipedia.org/wiki/Leading_lights https://en.m.wikipedia.org/wiki/Leading_lights
- nobodyknowin 2y agoWe do the same concept in night diving. Set a glow stick with a pie tin low, and another high behind and above it. Then when you come up from the dive you can see which way you need to swim along shore to exit where you entered.
- mensetmanusman 2y agoOnce you know about this effect, you see it everywhere. No one wears finely striped shirts for movies because of it.
- ranger_danger 2y ago>it will always display an arrow or series of arrows (sometimes strange, distorted ones) pointed in the direction you want them to go How does it know which direction is correct?
- Mashimo 2y agoIt assumes you don't want to go back. If you come from the left, it shows to the right.
- 23262626 2y ago[flagged]