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points
Luc
Joined 12,505 karma
A French in Kuala Lumpur. Financial services software, retired.
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- > Magnetic North: Shortest surface line to the magnetic north pole (simply in the direction of the compass at your location).
Magnetic North is the local horizontal direction of the magnetic field. But that doesn't generally coincide with the shortest surface line (geodesic) to the magnetic north pole (however you define that - there's several).
If you followed your compass you could end up in a loop without reaching the magnetic north pole.
- The author has done ~3 years of commercial work porting game engines, so that makes me add a lot of credence to the article.
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- Are you aware of https://machinations.io/ ?
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- I tried it and it works. The animation uses belts that are very flexible. With a real belt I needed to give it a shake to make it untwist itself, but it does work.
It is indeed easy to twist the belt until you have the hang of it.
I think the animation is a bit deceptive because even with elastic bands you'd have to provide some way for the correct untwisting to occur. In the animation it happens 'automagically'.
- This can't be the original source code.
https://github.com/Piddewitt/Loderunner/blob/main/Lode%20Run...
Original source, I imagine, would be very tersely commented, if only to fit in memory / floppy, and would have very short variable and subroutine names, and lots of mess and commented-out lines from experiments.
This looks like a very lovingly done disassembly.
- Swatch released a quartz version of this by the way, in a composite plastic+ceramic material:
https://www.chrono24.com/search/index.htm?dosearch=true&quer...
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