Webgl on NicoLabs

Hardcore Chaos Testing for Coni's Native Float32 Arrays

Sun, 28 Jun 2026 11:30:00 +0900

When you’re building high-performance applications in the browser, JavaScript’s generic Number type often isn’t enough. You need raw, contiguous memory arrays. In Coni WASM, we rely heavily on native WebAssembly float32 arrays for our most mathematically intensive applications.

Where is Float32 actually used in Coni?

Native float32 arrays (make-float32-array, f32-set!, f32-get) are the absolute backbone of Coni’s performance layer. You’ll find them powering:

WebGL Geometry: In our deep-focus-webgl app, we use float32 arrays to mathematically sculpt an 80,000-vertex brain matrix (240,000 floats!) natively, before shipping it to the GPU in a single shot via js/float32-buffer.
Game Engine Particle Systems: For games like flappy-bird or neon-boids, parallel float32 arrays keep track of thousands of X/Y coordinates, velocities, and lifetimes without garbage collection pauses.
Raw DSP Audio: Our sound-nodes synthesizer calculates complex impulse responses and noise waveforms natively using float32 arrays before mapping them into WebAudio channels.

The Bug: Type Coercion and `f64.reinterpret_i64`

Because of how critical these arrays are, any bug in them is catastrophic. Recently, we discovered an issue where passing an exact integer (like 150) into f32-set! would mysteriously yield 0.0.

Building 40Hz Cognitive Focus Apps in Coni WASM

Sun, 28 Jun 2026 07:30:00 +0900

WebAssembly in the browser has always promised incredible performance, but bridging it smoothly with Web APIs like WebAudio and WebGL can sometimes feel like solving a puzzle. Today, we’re thrilled to showcase how the Coni ecosystem elegantly solves this by introducing two brand-new web apps designed for cognitive focus.

These two applications generate a 40Hz gamma frequency—a specific brain wave frequency associated with deep focus, memory recall, and cognitive enhancement—using binaural beats. But the real magic lies under the hood: they are both written entirely in Coni WASM.

Writing WebGL Shaders in Pure Coni Lisp!

Sun, 28 Jun 2026 07:30:00 +0900

In our previous post, we showcased the raw power of Coni WASM by orchestrating an 80,000 particle WebGL matrix. But there was always one lingering annoyance in the WebGL pipeline: the shaders themselves.

If you’ve ever written WebGL code, you know the drill. You end up writing your Vertex and Fragment shaders as massive, messy string literals concatenated across your codebase. You lose syntax highlighting, formatting, and—most tragically for Lisp hackers—you lose structural editing (Paredit/Slurp/Barf).

Webgl on NicoLabs

Hardcore Chaos Testing for Coni's Native Float32 Arrays

Where is Float32 actually used in Coni?

The Bug: Type Coercion and f64.reinterpret_i64

Building 40Hz Cognitive Focus Apps in Coni WASM

Writing WebGL Shaders in Pure Coni Lisp!

The Bug: Type Coercion and `f64.reinterpret_i64`