ReferenceFinder: Find coordinates on a piece of paper with only folds (mutsuntsai.github.io)

That is really cool. I wish it had an animated video to display the result, that'd be even easier to follow and therefore even more impressive.

Is this brute forcing, or is there more to it?

I enjoy when HN surfaces out-of-the-box type stuff like this. Very cool.

Folding is more powerful than ruler and compass constructions. One can do cube roots, angle trisections and more.

Coincidentally enough, I had mentioned straight edge and ruler constructions in a different thread a few minutes ago

https://news.ycombinator.com/item?id=47112418

Related older thread

https://news.ycombinator.com/item?id=45222882

Folding could be called a superset of measuring.

Measuring could be called a special case of folding (it's an accordian fold)