If you like this project, you may be interested in a similar project that I did a while back using using the turtle interpretation of grammars to represent connections between LEGO bricks:<p><a href="https://github.com/jncraton/connectiongrammar" rel="nofollow">https://github.com/jncraton/connectiongrammar</a><p>The "API" is admittedly quite poor currently, as I just quickly hacked this together on top of NLTK, but I was able to put together some fun results.
This reminds me of a story of how Logo was implemented on 8-bit microcomputers.<p>Leigh Klotz was the man who ported MIT Logo to the Apple ][ and then the Commodore 64. According to him “The Commodore 64 CPU 6510 has a bidirectional parallel port at location 0 and 1, taking up 2 of the 256 "page zero" locations, which are the only ones you can indirect through. When I ported MIT Logo from the Apple II, there were lots of places that dereferenced nil without checking, and those caused crashes. Commodore gave me a chip they fabbed in qty 12 yield that brought out the I/D decide status as a pin, and we used a Nicolet-Paratronica logic analyzer to feed the address and data bus to a Pet running a BASIC disassembler. I could then set a breakpoint in-circuit to see the 256 instructions prior to or after the errant memory access, so I could go put on guard code...”<p>I got it from Jamie Zawinski's weblog. Be forewarned. Following the link from Hacker News will lead to an unsavory image. Just copy & paste it, instead.<p><a href="https://www.jwz.org/blog/2018/11/weird-machines/#comment-192213" rel="nofollow">https://www.jwz.org/blog/2018/11/weird-machines/#comment-192...</a>
I'm seeing some really interesting JavaScript techniques in the turtlevm.js[1] source.<p>This line in particular stands out:
const code = String(work).trim().split("{").slice(1).join("{").slice(0, - 1).trim().replace("/0/", _turtlevmapi).replace("/1/", strCode);<p>It looks like the author is injecting the turtle code written by the user into a "work" function that removes dangerous objects (XMLHttpRequest, WebSocket, etc).<p>Can someone with experience writing a VM in JS point to a good reference on the topic?<p>[1]<a href="https://turtletoy.net/js/turtlevm.js?v=56" rel="nofollow">https://turtletoy.net/js/turtlevm.js?v=56</a>
Go to this one [1], change the GEAR_NUM to like 30 and enjoy the rendering<p>1: <a href="https://turtletoy.net/turtle/9ddc6d4dc5" rel="nofollow">https://turtletoy.net/turtle/9ddc6d4dc5</a>
Ahhh, love this site. I own an axidraw pen plotter, and because I'm feeling generous, I'll print every sketch made by people in this HN thread.<p><3
For anyone interested about this kind of things, I did something a bit similar for 3d voxel rendering:
<a href="https://voxeltoy.com/" rel="nofollow">https://voxeltoy.com/</a>, also inspired by shadertoy.
I have seen this site some days ago (reddit maybe?) and I really like the concept! The design is very clean!<p>One feature I'd like: A way to slow down the render so we can see the whole generation in slow-motion.
I am highly impressed that some of these actually implement wireframe hidden surface removal:<p><a href="https://turtletoy.net/turtle/9ddc6d4dc5" rel="nofollow">https://turtletoy.net/turtle/9ddc6d4dc5</a>
Not really in the true spirit of turtle (if it doesn't "go forward" I don't count it!), but I had to make this one based on the MAD computer program discussed here yesterday.<p><a href="https://turtletoy.net/turtle/ba15abdde7" rel="nofollow">https://turtletoy.net/turtle/ba15abdde7</a>
This reminded me of a physics toy I saw ~10 years ago where you would draw simple two-dimensional robots with legs and muscles, optimize their gait, and race them.<p>If only I could remember the name of it...
Reminds me of <a href="https://dwitter.net" rel="nofollow">https://dwitter.net</a>: you get 140 characters to animate an HTML canvas.
While TurtleToy is way more advanced, few years ago I built a small webapp that uses nested CSS to make recursive images: <a href="https://zetabee.com/weave/" rel="nofollow">https://zetabee.com/weave/</a><p>Click [Help] button to get an idea of how it works. It was heavily inspired by Structure Synth but written from scratch to work with CSS3 in a modern browser.
This takes me back. I remember learning Logo at school when I was 10 or 11 and had a project to do using Logo. For some reason I couldn't make it into school for a few weeks, I'm not sure if I was ill or something else but was going to miss the project hand in date, so I wrote the code on paper while I was at home as I didn't have a Logo compiler or interpreter for my ZX Spectrum. My teacher put my code into the interpreter and it ended up looking exactly as I had expected. I think it was a tank and used procedures/functions which was above and beyond what we'd been taught.<p>Of course Logo wasn't the most complex language ever but I remember being pretty pleased with myself having written a computer program on a bit of paper and it doing exactly what I'd visualised it to do.
I am so glad this exists. Turtle Graphics remains the best way to teach so many fundamental concepts. From recursion to path finding.<p>One feature that I wish existed was library import. Or community accepted set of extension modules. An easy way to call polar coordinates, Spirographs, matrix transforms, etc.
Reminds me of Context Free Art <a href="https://www.contextfreeart.org/" rel="nofollow">https://www.contextfreeart.org/</a><p>They developed their own declarative language for generating art.
Is it possible to get vector files of some sort out of these? .SVG, .AI, .PDF, or something similar would be awesome.<p>Edit: I meant directly from the site. I could do it from my desktop using python.<p>PS, this is awesome!
These are great!<p>Also reminds me of the Forth Haiku Salon: <a href="https://forthsalon.appspot.com/" rel="nofollow">https://forthsalon.appspot.com/</a>
If you're into this, you might also be interested in robotic pen plotters. This article from last year kicked off a serious new hobby for me which combines code/art/robotics/etc and has been a ton of fun.<p><a href="http://www.tobiastoft.com/posts/an-intro-to-pen-plotters" rel="nofollow">http://www.tobiastoft.com/posts/an-intro-to-pen-plotters</a>
If you're into this kind of thing, I made a similar Turtle clone with a simpler syntax:<p><a href="http://prismaco.de/" rel="nofollow">http://prismaco.de/</a><p>But I also like the approach here of using Turtle as a way to introduce JavaScript syntax. :)
if you want an even more minimalist API you can try out lindenmoji:<p><a href="https://twitter.com/lindenmoji" rel="nofollow">https://twitter.com/lindenmoji</a>