Using the moiré effect to show different arrows to each observer (2018)
popularmechanics.com
popularmechanics.com
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.
[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.
Posting here below a downvote won't help anyone but us, but here's a couple I'm looking at:
this particular article is not a good replacement for the video, it adds nothing, it subtracts some things... but the video also doesn't say all you want to hear either. The article could have used a small animated gif like one might see in a wikipedia article. It would be very nice to see what simple patterns when overlaid would give you >> and << from different angles.
The 30 page story is about a guy who would “prefer not to” and stayed that way until he died.
(I only skimmed the story)
Bookofjoe would prefer not to watch the video. You would prefer not to read the 30 page story.
Would you skim "War and Peace"?
And who you callin' old?
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.
Then when you come up from the dive you can see which way you need to swim along shore to exit where you entered.
> 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.
The effect seems to be very similar, but the Wikipedia page I linked doesn't describe itself as using the Moire effect.
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.
No one wears finely striped shirts for movies because of it.
How does it know which direction is correct?
If you come from the left, it shows to the right.
With another behind
That's a moiré
Can you create a lenticular-type image with this?
Can you use a variable moire effect to create motion graphics?
Yes! https://www.creativebloq.com/animation/moire-effect-book-714...
https://www.youtube.com/watch?v=6G5rTavyx7A
https://www.inkworldmagazine.com/contents/view_online-exclus...
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.