iiinova — where your digital self keeps evolving

A Unique Performance Optimization for a 3D Geometry Language

Wrote a post about a neat optimization opportunity I ran into for Geotoy cprimozic.net/notes/posts/... It uses persistent constant expression memoization to skip work when re-running slightly modified programs. It's effective since Geoscript programs are basically pure functions

cprimozic.net

For the past several months, I’ve been working on a programming language called Geoscript. It’s specialized for generating and manipulating 3D geometry for use in a Shadertoy-inspired web app called G...

000

Oh hell yeah, that's a banger. I feel like it's going to be considered a monumental song for decades to come

Another modern track that has become one of my all-time favorites: www.youtube.com/watch?v=K2B_... (Screenspace by Namitape) The MV is super creative too and really makes it special to me. There's a raytracer test scene featured and some other computer graphics references

YouTube video by namitape

Namitape - Screenspace

000

Some of these modern vocaloid producers are out there creating just really amazing stuff www.youtube.com/watch?v=icBD... (song is Looping the Rooms by rusino) I've said this before, but it really warms my heart that Vocaloid is still popular, thriving, and evolving in 2026

ループザルーム feat. 初音ミク / "Looping the Rooms" ft. Hatsune Miku

YouTube video by ルシノ / rusino

331

Casey Primozic / ameo @ameo.dev · 07/01/2026

Still working on my Geotoy project on and off Building up a pretty decent collection of cool stuff with it 3d.ameo.design/geotoy/edit/71 3d.ameo.design/geotoy/edit/72 3d.ameo.design/geotoy/edit/76 3d.ameo.design/geotoy/edit/66

Colorful curlicues resembling twist-ties twisted into various sorts of spirals and textured with a bright geometric chevron pattern

A voxel construct resembling a hollow hourglass sitting on a concrete mat with a folding structure around it

A concrete or stone walkway with shiny dark puple rock-like organic-looking spires surrounding it

A series of gray tendrils or pipes following an organic looking flow pattern reminiscent of fluid dynamics or smoke

Casey Primozic / ameo @ameo.dev · 26/12/2025

Working on some TikZ diagrams for a new blog post

A diagram representing the architecture of a neural network for a recommender model. It shows an input consisting of concatenated presence flags and hybrid-normalized ratings, an encoder hidden layer, a bottleneck layer of size 512, and then two output decoder heads each of which have two hidden layers. The decoder heads are labeled "Presence Decoder" and "Ratings Decoder".

Casey Primozic / ameo @ameo.dev · 26/10/2025

An alternate style This one took almost 8 minutes to generate though. CGAL has some pretty severe performance issues when running in Wasm. It relies on having strict control over FPU rounding mode flags, but those aren't controllable in Wasm, so expensive emulation is needed

A screenshot of a 3D model created and rendered with Geotoy. It depicts a multi-layered folded shell enclosed in a spherical area, textured and shaded with shiny gold-colored streaks across its surface. The base surface appears rather matte and rocky while the golden streaks are shiny and metallic. It consists of many separate thin layers of material that warp and curl in roughly the same way as each other, yielding an organic look reminiscent of a smooth endoplasmic reticulum.

001

Casey Primozic / ameo @ameo.dev · 26/10/2025

It's created by sampling points in a sphere and only accepting those in very small ranges of a 3D FBM noise function The color and roughness shaders are completely procedural, also built using FBM noise. The normal map is not procedural and uses a texture with triplanar mapping

Casey Primozic / ameo @ameo.dev · 26/10/2025

My latest creation with Geotoy, built using the alpha wrap function from the CGAL library I've been getting a ton of value out of this; it's really useful for creating organic-looking structures You can see it in 3D here: 3d.ameo.design/geotoy/edit/62 (takes ~30 seconds to run)

112

Casey Primozic / ameo @ameo.dev · 24/10/2025

I've not been writing enough blog posts in recent months, I need to get back on that.

000

Casey Primozic / ameo @ameo.dev · 16/09/2025

A wall from "Only God Forgives" 3d.ameo.design/geotoy/edit/55

A screenshot of a 3D model of a wall with detailed cutouts. A stone wall panel with a repeating lattice of decorative cutouts. The pattern consists of elongated oval shapes arranged horizontally, intersected at their centers by small circular openings. These patterns repeat in a matrix across the surface, creating a perforated screen. Warm light glows from behind the wall, highlighting the depth of the carved openings and casting shadows through the pattern. There is some Geoscript code visible on the bottom of the image which was part of that which generated the model in the scene.

000

Casey Primozic / ameo @ameo.dev · 15/09/2025

A pedestrian bridge from the Ghost in the Shell live action movie I built in Geotoy 3d.ameo.design/geotoy/edit/54

A screenshot of a 3D model of a pedestrian bridge rendered with Geotoy. It shows a bridge with a green fence along either side and several large windows. There is a text editor with code at the bottom.

A screenshot from the Ghost in the Shell live action movie showing a pedestrian bridge. The bridge is made of metal and painted white with large windows cut into its side and a green railing. There are large highrise apartment buildings in the background.

120

Casey Primozic / ameo @ameo.dev · 02/09/2025

I recorded a little video giving a tour of my Geotoy project www.youtube.com/watch?v=CtbX...

YouTube video by CaseyC104

Geotoy Showcase + Demo

Casey Primozic / ameo @ameo.dev · 19/08/2025

Wrote a little post this weekend about all the tech/tools/techniques that went into my Geotoy project cprimozic.net/blog/the-tec...

cprimozic.net

The Tech Behind Geotoy

Casey Primozic / ameo @ameo.dev · 03/08/2025

After _much_ effort, I've gotten the boundary-first-flattening library compiling to WebAssembly (geometrycollective.github.io/boundary-fir...) So now I can auto-unwrap UVs for meshes that triplanar mapping works badly for in Geotoy

A screenshot of a mesh rendered in Geotoy. It looks like a sphere with some holes drilled in it that has been split in half sideways.

The sphere is textured with a debug texture showing UV coordinates across different parts of its surface

001

Casey Primozic / ameo @ameo.dev · 25/07/2025

I'm putting real effort into making the docs for geoscript/geotoy as high-quality as possible I created these little inline examples that show the code and its output directly on the docs page 3d.ameo.design/geoscript/do...

A screenshot of the docs page for geoscript showing details about the `stitch_contours` function. At the top of the docs for that function, there is an expanded example that shows some geoscript code on the left using the function and an image on the right representing the output of running that code.

Below the example, there are docs for the function including the function signature, argument names+types+default values, return type, and a description of each argument.

Casey Primozic / ameo @ameo.dev · 25/07/2025

Re-discovered this absolute banger of a song today www.youtube.com/watch?v=ajD9... It's just so incredibly satisfying to listen to for some reason

t+pazolite - Heartache Debug (feat. 赤川ねね)

YouTube video by t+pazolite

000

Casey Primozic / ameo @ameo.dev · 23/07/2025

It's always so hard to call something "finished" but I'm making a lot of cool stuff with this already tbh 3d.ameo.design/geotoy

A screenshot of the geotoy web app showing a scene that looks like a roof composed of interlocking shingles. the shingles are a curved shape with a shiny gray stone-like texture.

There is a code editor in the bottom left of the screen showing some syntax-highlighted code in a functional-looking programming language. It has variables like `shingle` and function calls like `fan_fill` and contains the code that defines the scene.

In the bottom right of the screen, there is some output showing basic stats about the scene and program like runtime in milliseconds, total vertices, and total face count.

121

Casey Primozic / ameo @ameo.dev · 16/07/2025

It turns out that ipv6 being broken is so common that most browsers and other HTTP clients will try both ipv6 and ipv4 in parallel (or after a short delay) and just use whichever one works or connects first lol

Casey Primozic / ameo @ameo.dev · 16/07/2025

TIL my webserver's ipv6 configuration has been broken since it got rebooted several weeks ago But things have still been working even for ipv6 users thanks to the "Happy Eyeballs" algorithm from RFC 8305: datatracker.ietf.org/doc/html/rfc...

datatracker.ietf.org

RFC 8305: Happy Eyeballs Version 2: Better Connectivity Using Concurrency

Many communication protocols operating over the modern Internet use hostnames. These often resolve to multiple IP addresses, each of which may have different performance and connectivity characteristi...

Casey Primozic / ameo @ameo.dev · 29/06/2025

Sneak peak of a project I've been working on recently

Screenshot of a web app showing a 3D model of what looks something like a bird bath rendered along with a code editor with some code in a functional-looking programming language. There's a "run" button along with some stats about how long the code took to run, how many faces/vertices are in the mesh, etc.

120

Casey Primozic / ameo @ameo.dev · 01/06/2025

I think it was around Covid era when I first started seeing Internet culture show up in graffiti I love it

A photograph of some graffiti featuring text written in black on a white background. The text says "bro had the texture pack on". There's various other scribbles and illegible text surrounding that writing.

Casey Primozic / ameo @ameo.dev · 07/05/2025

The authors shared a shadertoy with a working implementation already too shadertoy.com/view/MXyBDW

shadertoy.com

Shadertoy

Casey Primozic / ameo @ameo.dev · 07/05/2025

Really fascinating paper with techniques for dramatically speeding up raytracing of FBM-based procedural scenes inria.hal.science/hal-05046040 Volumetric rendering is one of my favorite topics in computer graphics, and I'd love to try implementing this technique in my three.js work

inria.hal.science

Fast sphere tracing of procedural volumetric noise for very large and detailed scenes

Real‐time walk through very large and detailed scenes is a challenge for both content design, data management, and rendering, and requires LOD to handle the scale range. In the case of partly stochast...

Casey Primozic / ameo @ameo.dev · 28/04/2025

Been getting around to some work on my browser-based DAW project again, finally getting a proper visual EQ built out I'm finally accumulating a decent amount of building blocks for these modules in the codebase rather than having to build everything from scratch each time

021

Reposted by Casey Primozic / ameo

amos @fasterthanli.me · 17/03/2025

Help test rust-analyzer! Now with 100% more salsa: exciting stuff www.reddit.com/r/rust/s/Lxp...

reddit.com

From the rust community on Reddit: call for testing: rust-analyzer!

Explore this post and more from the rust community

26913

Casey Primozic / ameo @ameo.dev · 06/03/2025

6:00 PM sunset providing incredible amounts of energy, motivation, and feelings of well-being And daylight savings switch will make it 7PM very soon

Casey Primozic / ameo @ameo.dev · 10/02/2025

Getting close the part of the year where days get longer the fastest! This chart shows the daily percentage change in day length over the year for some different latitudes. For me, having days get longer faster really helps get that "spring is coming!" energy going

A plot showing the daily percentage change in day length by latitude.

The higher the latitude, the more dramatic the changes are, but they all peak around February.

Image source: http://wordpress.mrreid.org/2014/10/19/rate-of-change-of-day-length-with-latitude/

030

Casey Primozic / ameo @ameo.dev · 28/12/2024

I'm using this as motivation to write alt texts for these diagrams

A diagram created with TikZ to illustrate a data structure for solving advent of code 2024 day 9 part 2. It show two rows of nested nodes that represent slots of filled and free space on an imaginary filesystem. The nodes are split in the middle with the left showing a set of contiguous files with different IDs along with their sizes, and the right side shows how much free space is available after that file indicated by the null set symbol. The first row shows the original filesystem layout after parsing and the second shows the result after running the algorithm for the problem.

100

Casey Primozic / ameo @ameo.dev · 27/12/2024

I'm finally working on a new blog post: a rundown of the very cool optimizations I used to compute Advent of Code 2024 day 9 part 2 as fast as possible I'm using TikZ to create the visualizations, which creates SVGs that have a nice academic vibe to them

A diagram demonstrating how the algorithm for day 9 part 2 of advent of code operates. It shows rows of cells filled with numbers of blanks. Each row shows the state of the filesystem after one iteration of defragmenting. There are arrows drawn to indicate where files are removed from and written to.

100

Casey Primozic / ameo @ameo.dev · 26/12/2024

A new one for me: Someone has created a fake Twitter account for one of my side projects. It's filled with dozens of seemingly AI-generated posts trying to make it look like it's partnering with some crypto pump-and-dump website Fascinating times we live in

Casey Primozic / ameo @ameo.dev · 26/12/2024

I wrote up some notes about how I used constrained cubic bezier curves in the envelope generator for my browser-based synthesizer cprimozic.net/notes/posts/... They look and sound much better than the x^n function I had before, and I the math involved turned out to be very neat

030

Casey Primozic / ameo @ameo.dev · 25/12/2024

crazy things happening in Ruby

Casey Primozic / ameo @ameo.dev · 25/12/2024

Gamma correction and color encodings feels like a perpetually unsolved problem in graphics. Probably because it only breaks things in a subtle way most of the time