Yawn

Yawn Core is two things: a generic structure-of-arrays arena in a SharedArrayBuffer, and a Rust render graph that turns externally supplied WGSL into an up-front WebGPU loadout.

JSO or FXNode → AST → S-expression → worker messages → Rust/WebGPU
                                                   ↑
any thread → direct shared row writes ─────────────┘

The arena starts with only one eight-float signals row for frame timing and render invalidation. Messages create or delete other { name, rows, stride, format } arrays, allocate named slots, compile graphs, switch loadouts, and control render pacing. Existing render data is changed by writing f32, u32, or i32 rows directly, then setting the shared-data dirty signal. Allocations are 64-byte aligned, row strides are multiples of 16 bytes, and compatible non-overlapping transient textures share physical allocations.

WGSL, pipelines, glTF import, and conventional mesh/camera/material handles live in addons/; core contains no shader or scene model.

npm start

This opens the docs. The complete runnable example is at /playground.

Run npm run coredocs for the raw worker-message, shared-memory, and render-graph reference intended for custom handles, editors, and direct SAB clients.