nordisk/facett

facett-model3d — crate card

Reverse-engineered (from source — verify, don't trust the name)

• One-line pitch: A reusable 3D-model viewer Facet: load an embedded glTF/.glb mesh, slowly spin it (deterministic), CPU-light it, and tint a named sub-mesh by a status scalar.
• Does: Model3D loads a glTF/.glb mesh (from_glb/load_glb) and draws it through facett's existing CPU painter path (project → back-face cull → painter's-algorithm depth sort → Lambert shade against each glTF group's base colour) — no three-d/rend3/wgpu pass, so it renders identically native + wasm and stays headless-snapshot-testable. Auto-rotate is injected-clock deterministic (FC-7, like RabbitLogo3D). Its one domain feature: a status tint — a named group (default "eyes") shaded green→yellow→red by a status ∈ [0,1] scalar via facett_core::render::decor::gradient_by_scalar. Bundled fixtures: a procedural skull() (baked by the gen_skull bin) and a geometry-only CC0 avocado().
• Key deps: facett-core (Facet, CPU render/decor), egui, serde_json, gltf 1 (pure-Rust glTF reader, wasm-OK, no GPU pass). Dev: eframe, egui_kittest. Bins/examples: gen_skull, skull_demo, view_glb.
• Shape: lib + a gen bin, ~900 lines. Modules: lib (355), mesh (198), glb (122), skull (89), tests. Embeds assets/skull.glb + assets/avocado.glb.
• Observed role in the workspace: A demo-friendly status console (a spinning skull whose eyes redden as things degrade); drops into a FacetDeck like the other 3D panes.

Fill in (one line each — only the human knows these)

• Primary consumer(s):
• Why it exists (vs the obvious alternative):
• Hard constraint (airgap / no-C-deps / no-FFI / pure-Rust / etc.):
• Release cadence & independence (rides a parent? own repo someday?):
• Status (production / prototype / experimental / stubbed):
• Must-NOT-change invariant:
• Biggest known gap or TODO:
• Anything a newcomer would get wrong about it: