Rust 3D physics engine built with Gemini Argon: 20k bodies in 90KB
LinusEkenstam · x · 2026-10-14
Linus Ekenstam worked with Gemini 4 Argon to build a physics-based 3D engine from scratch in Rust with a custom WebGL2 renderer, running in-browser via WebAssembly.
- Zero external math or physics crates, 1,200 lines of Rust, <100KB .wasm at 120 FPS
- After tuning, handles 20,000 physics bodies with 2,000 simultaneous collisions (previously broke past 2,000)
- Weighs about 90KB total, built using dialkit
A showcase of building system-level software from scratch with a frontier model.
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