4 ms·
The sunlight plot is interesting. Since Dec wraps around to Jan, you can fold the left and right to make a tube. Since 23:59 wraps to 00:00 you can fold the t
by froggerexpert 2y ago
The sunlight plot is interesting.
Since Dec wraps around to Jan, you can fold the left and right to make a tube.
Since 23:59 wraps to 00:00 you can fold the top and bottom of the tube, making a torus (a donut).
For a fixed lat/long, each point on the torus corresponds to the sunlight observed at a particular time throughout the year. Why bother with a torus? The shape itself embeds the continuity of time across days/years that is otherwise left implicit in the typical 2D plot.
I've wanted to plot this in 3D or have it printed on a ring, but never got round to it.
Any one seen anyone do this?
- jagged-chisel 2y agoSo a toroidal illustration of our trip around the sun with the “amount of sunlight” graph along it … someplace. Sounds neat!
- froggerexpert 2y agoYes, exactly!
- deleted 2y ago[deleted]
- jpm_sd 2y agoRelated: https://en.wikipedia.org/wiki/Analemma https://en.wikipedia.org/wiki/Analemma
- deleted 2y ago[deleted]
- Centigonal 2y agoYou got me curious, so I gave it a try with the graphic in the article! https://www.loom.com/share/5665143f2d274bd0bf65ef378fad39a3 https://www.loom.com/share/5665143f2d274bd0bf65ef378fad39a3 There's two toruses in the clip, one with the daylight on the inside, one with the daylight on the outside. One thought I had while making this is that you could visualize multiple years, or even someone's whole life, as a string winding a long spiraling path down the length of a helix.
- froggerexpert 2y agoVery cool. What program is that? It'd also be nice if the colour was not just day/night, but the actual predicted daylight at the time of day, which would result in a continuously changing colour. I guess at that point, the sine approximation from OP would no longer apply, and https://en.m.wikipedia.org/wiki/Sunrise_equation https://en.m.wikipedia.org/wiki/Sunrise_equation would have to be used.
- Centigonal 2y agoIt's Blender! Great OSS project.