ianthehenry

Joined 15 years ago

Karma
1,866
Submissions
177
Member since
Sep 14
blog: https://ianthehenry.com

3d lisp art playground: https://bauble.studio

book i wrote: https://janet.guide

2d lisp art playground: https://toodle.studio

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Recent submissions

Comment · 1 month ago
Comment · 2 months ago
Comment · 4 months ago
https://github.com/ianthehenry/janet-module/blob/master/init...

This is a very very barebones version of this, but it’s not too hard to construct environment tables dynamically

Comment · 4 months ago
The `import` macro extends the current environment with prefixed symbols from another environment. But the environment is a first-class object that you can hold and manipulate and use in arbitrary ways — `require` is the lower level primitive that `import` is built on.
Comment · 4 months ago
Comment · 11 months ago
Comment · 1 year ago
Bonsai is a frontend framework that models data as an explicit graph, separate from any “component hierarchy” or DOM structure. State can live anywhere in the application graph, whether or not it’s associated with DOM nodes, and you eliminate all of the “move this state to the parent to share it” ceremony by just having “components” return their views and “outputs” at the same time (if they want).

It’s pretty great and hard to imagine going back to a React-like component hierarchy.

Comment · 1 year ago
I'm working on adding something like https://graphtoy.com/ to my lisp-based 3D art tool https://bauble.studio/. It's really useful to visualize functions like this, especially when writing animation curves that vary over time.

It's easy to add it as a plain overlay over the screen if you're graphing a function, but I really want it to be able to plot arbitrary expressions with free variables where it just infers the axes, so you can just see values overload in the orthographic view (press alt-q to see that). That way you can just write something like (ss p.x 0 10 | graph) on any expression and visualize it as you go. I haven't quite figured out how to make it seamless though...

Comment · 1 year ago
If this kinda thing piqued your interest and you want to play around with this idea, paste the following code into https://bauble.studio/:

    (def octaves 4)
    (def lacunarity 2.00)
    (def persistence 0.50)
    (def period 100)
    (def height 40)
    (plane y (fbm octaves :f lacunarity :gain persistence perlin p.xz period * height)
    # try s/color/shade on the line below
    | color (ss p.y -20 0 blue (ss p.y 0 20 green white))
    | slow (20 / height)
    | intersect (sphere 200))
(Using the terms from the article.) You can right-click and drag those numbers to see how the parameters affect the result in realtime. Also an easy way to compare perlin and simplex noise. Procedural terrain is fun!

Also while this uses 2D perlin noise -- you're just changing the height of a plane -- you can create some pretty detailed neat "rocky" terrain effects by using 3D perlin noise instead. Change "p.xz" to "p.xyz" to see what that looks like.

Comment · 1 year ago
okay, that's helpful. the "undefined is not an object" bit is definitely a function of the "failed to create webgl2 context" error -- it tries to reference it unconditionally. no idea why it can't create the graphics context in the first place, though (and not much to do without one)
Comment · 1 year ago
huh, that's no good. it works fine for me on safari 18.1. would you share the line that it's raising on? no other errors before that one?
Comment · 1 year ago
I ordered them from sculpteo — the only service I could find that would do it. Very happy with everything I’ve gotten from them. It is very very expensive if you want to make anything large, but for small jewelry-scale stuff it’s not too crazy. The balloon is seven custom parts so that was pricey ($250 total?), but the other two models were around $50 each.
Comment · 1 year ago
It's complicated; Calvin Rose was the original creator of Fennel ("fnl"), but I understand it was just a little side project that he made over the course of a week or so in college. Phil Hagelberg found the project years later and thought it was cool, took over as its maintainer, and basically turned it into the Fennel you know today. So it's like, kind of, I dunno, both things are kinda true.
Comment · 1 year ago
hi, i am the author of this book and i agree with you. it's not a good connotation. i chose it because: 1. it is kinda memorable (look there are so many programming books with exactly the same name) 2. the language is named after an immortal being who guides mortals through the afterlife in the fictional property the good place, so there's some kinda connection. but i agree the implication that janet is somehow "hard" to learn or that the author is somehow "on a higher plane" is bad. i waffled on this a lot but never came up with another title i could stand and ultimately just pulled the trigger. (but note that i left myself some wiggle room with a neutral domain name.) i hope the tone of the book itself helps to counteract the title, but ya know who knows

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