5 ms·

Videos showing rotations: https://www.youtube.com/watch?v=KtA6u1HIqbg https://www.youtube.com/watch?v=KtA6u1HIqbg (Garage roof) https://www.youtube.com/watch?v=

• kurthr 5y ago
  And this guy shows how you can 3D print the squicular design by varying the height of the edges (arch up on 2 sides and arch down between the other 2)... it only works well at ~45deg angle. https://youtu.be/SKpOKXAVjGo https://youtu.be/SKpOKXAVjGo
• Jeff_Brown 5y ago
  That first video is so much more helpful than the second. Funny how you (or I at least) can see the thing rotate and still have no idea what it looks like. An interactive experience would be more illuminating. What's some good software that'll let me rotate the 3d model?
  • inimino 5y ago
    You can approximate this by dragging the scrubber on the youtube video back and forth while the object is being rotated. When it's about half-way rotated, then it all makes sense.
  • twic 5y ago
    Here's a better explanation of the cylinders: https://www.youtube.com/watch?v=yupxceBjDa0 https://www.youtube.com/watch?v=yupxceBjDa0 I have no idea what software he used. Just that it's state of the art.
• samplatt 5y ago
  Short version - both the camera angle and the angle of reflection from the mirror are producing forced-perspective illusions. The object topology is not accurately shown in the camera perspective OR the mirror. This took me way too long >_>
  • whoisburbansky 5y ago
    The phrase “forced perspective” really keys into why this works, at least for me. Doesn’t take away the magic of seeing it in action, but it does help with some of the “how in the world?”-ness of it.