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open-standards/wai/volumetric-conformance
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Transaction Science df20c392d8 wai: interactive + temporal cargo classes, provenance, telepresence 
Adds the "carries whatever it can reconstruct, verifies whatever it
carries" surface on top of the existing neural/codec WAI. All builds
green against this base (wai-rs all-features tests + clippy, wai-web
wasm, wai-spz-gen, wai-relay).

Reconstruct half — each a spec + conformance corpus + in-tab browser
sink that re-derives the corpus hash, over one wai.det.fixed64 floor:
  - interactive worlds      replay-equivalence   (3 sim registrants,
    relay multiplayer, session receipts, glTF + real-SPZ assets)
  - spatial audio           mixdown-equivalence
  - haptics                 sample-equivalence
  - state-feeds             replay-equivalence  (non-physics sim)
  - avatars / digital humans  pose-equivalence  (+ telepresence)
  - volumetric / 4D splats  frame-state-equivalence (WebGPU EWA render)

Verify half (lever 4):
  - asset provenance — signed, energy-accounted lineage for opaque
    captured content WAI does not reconstruct; tamper-evident in-tab.

Cross-cutting: per-class JWP receipt profiles; a native energy meter
(IOReport via macmon, no sudo) emitting receipts with real measured
joules. Codecs gated behind a `codecs` feature (default on) so the
world/wasm sinks build without the C codec chain.

Excludes the separately-evolving neural subsystem (semantic path, GLC
rANS, ONNX tooling) to avoid reverting newer origin work.

Co-Authored-By: Claude Opus 4.8 <[email protected]>
2026-06-13 23:16:42 -04:00
..
vectors wai: interactive + temporal cargo classes, provenance, telepresence 2026-06-13 23:16:42 -04:00
expected_hashes.json wai: interactive + temporal cargo classes, provenance, telepresence 2026-06-13 23:16:42 -04:00
README.md wai: interactive + temporal cargo classes, provenance, telepresence 2026-06-13 23:16:42 -04:00

README.md

Volumetric / 4D Splat Conformance Corpus

Vectors for the volumetric extension (wai.splat.4d). The criterion is frame-state-equivalence: given the same temporal-splat clip, a conforming sink MUST reconstruct the identical Gaussian set at every frame, hence the identical BLAKE3 — on every machine, no tolerance parameter. The temporal counterpart of the static splat, with the single cloud replaced by per-Gaussian keyframed tracks.

Each Gaussian carries a track of keyframes (frame, position, scale, rotation quaternion, color, opacity, all wai.det.fixed64); the sink interpolates linearly in the Fx floor at any frame. The frame hash is BLAKE3(domain || frame || n_gaussians | per-Gaussian 14×i64). The render of that set (EWA splatting, sort, blend) is the sink's presentation, never in the hash.

Clips are self-contained, so each vector is a .w4ds container + its per-frame expected hashes.

Layout

  • vectors/<name>.w4ds — the W4DS container (contract + Gaussian tracks).
  • expected_hashes.json — per clip: n_gaussians, n_frames, clip_hash, and frames[] = {frame, hash} for every frame.

Vectors:

  • orbit — two Gaussians swap x positions across 12 frames.
  • pulse — one Gaussian scales up and fades out across 10 frames.
  • morph — one Gaussian shifts color red → cyan across 8 frames.

Running

cd ../wai-rs
cargo run --features splat4d --bin wai_splat4d_vectors -- verify ../volumetric-conformance
cargo run --features splat4d --bin wai_splat4d_vectors -- gen    ../volumetric-conformance   # regenerate

Pass = clip-hash and every frame-hash equality.