Recursive Drawing (recursivedrawing.com)

Related. Others?

Recursive Drawing - https://news.ycombinator.com/item?id=28005194 - July 2021 (1 comment)

Recursive Drawing - https://news.ycombinator.com/item?id=19680149 - April 2019 (36 comments)

Recursive drawing - https://news.ycombinator.com/item?id=16728049 - April 2018 (17 comments)

Recursive Drawing - https://news.ycombinator.com/item?id=3951255 - May 2012 (83 comments)

is there a way to emulate drag-and-drop on a (touch-based) Chrome Android?

It seems obvious now that hyperbolic space is recursive like this.

Much appreciated.

Toby's current startup: https://cuttle.xyz/ (I'm an investor)

Interesting. This work was done at ITP (which is short for interactive theorem proving, but not here). The ITP has been founded by Red Burns, who has written a foreword (really a foreword interview) for John Maeda's "Creative Code". And I am currently looking at Maeda's work, after recently discovering his book "Design By Numbers", which is just fabulous (and looks great on a coffee table, although I don't have one). And as it happens, I plan to implement a version of Design By Numbers in Abstraction Logic. And in order to make it easy for users to write down Abstraction Logic terms, I have invented a new simple text format called Recursive Text [0]! Which closes the circle to RecursiveDrawing.com.

[0] More info about Recursive Text (RX) will be available next month at http://recursivetext.com . Its semantics is really simple:

    RX = Block+
    Block = Line (Line | Block)*
    Line = Character*

RX is saved as a text file, encoding above semantics via indentation. It can be edited as a normal text file, but is intended to be edited in a special editor that respects and exploits above semantics.

I wonder how this relates to the old combinator-based approaches of Peter Henderson [1] and the logic-programming version [2]. Guy Cousineau also had a go with "Functional programming and geometry" in the late 1990s. I guess we'd say these are capable of describing corecursive pictures now.

I always felt this stuff would make a better foundation for web layouts than CSS.

[1] https://dl.acm.org/doi/pdf/10.1145/800068.802148

[2] Logic programming, graphics and infinite terms P. R. Eggert, K. P. Chow Department of Computer Science University of California, Santa Barbara UCSB DoCS TR 83-02 June 1983.

My (much simpler, decades old) one

https://plasticeagle.com/fractal.html

I'm sure many people have written similar things, in various technologies, over the years. Let's see them.

cool

Is it a right or left fold?

If left, then tail call optimization would really help performance.