Halfspace experimental IDE for solid modeling with distance fields

Since it's 2026, let me note at the outset that this is not vibe-coded. I've been working on it since April 2025 and am writing the code using my human brain, for various reasons (and Fidget dates back to 2022).

Now, the rest of this writeup assumes some knowledge of implicit surfaces; please see many previous writeups for details for more background info (or just keep reading, you'll be fine).

I've spent a bunch of time writing implicit kernels, slightly less time writing GUIs on those kernels, and even less time actually modeling with those tools.

In practice, I don't actually need to do much solid modeling in my daily life, so most of the stuff that I create is a demo or an example of how to use a particular kernel.

Still, I've noticed a particular tension when working with implicit surfaces. Working with low-level implicit surfaces is a bit like writing assembly: it's low-level, powerful, and annoying. If all you're given is x, y, z variables – and it's your responsibility to combine them into all the shapes of your dreams – that can be a painful experience.

When faced with the pain of writing assembly, most people build abstractions on top of it: high-level languages and libraries that compile down to a low-level representation. The equivalent here is a standard library of shapes and transformations: sphere, box, translate, scale, etc.