hz6666/3d-wm-atomic-v3

3D-WM Atomic — v3 (batches b07–b14)

Synthetic CAD construction videos paired with per-frame atomic action ops, for training video→action (inverse-dynamics) and image→video world models.

v3 extends the v2 dataset (batches b01–b06) with b07–b14. Identical format and contract.

Format: v2-continuous-mm

Raw float-millimeter op parameters (no quantization); each clip is translation-canonicalized so the final-mesh bbox is centered at the world origin. The full schema — atomic op vocabulary, scale/camera metadata, the SKETCH_BEGIN depth-DOF caveat, and the recommended near-blank reader filter — is documented in the companion dataset_spec.md.

Layout

data_hula_b07 … data_hula_b14/        # one prefix per source batch
  b0000 … bNNNN/train/shard-*.tar      # tar shards, ~25 clips each (~10 shards/batch-idx)

Each clip = one (case, view):

• 0000.png … NNNN.png — per-op construction-animation frames (256×256)
• meta.json — scale / camera / canonicalization + per-frame op_spans
• ops.json — atomic op tuples (raw-mm floats) + human-readable ops_human

5 views per case (iso / front / side / top / random) sharing one auto-fit scale anchor — identical world_diag_mm / approx_mm_per_pixel across siblings, only the camera angle differs.

Quality gates (at generation time)

• Geometry validity — OCC BRepCheck; invalid / self-intersecting solids are dropped.
• Near-blank — a case that renders near-blank from every view (measured on a neutral palette) is dropped (valid-but-tiny solids).

Every shipped clip is therefore a valid, visibly non-blank solid.

Scale

~8000 cases/batch × 8 batches × 5 views ≈ 300k clips.

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