| --- |
| tags: |
| - hexgen |
| - cad |
| - mesh-generation |
| --- |
| |
| # hexgen — abc_v1 training data |
| |
| Training pairs for a decoder that reads a CAD solid and emits a *program* which |
| compiles to a hexahedral finite-element mesh. Exported from the `hexgen-corpora` |
| Modal Volume by `modal_app/share_corpus_fn.py`. |
|
|
| | path | contents | size | |
| |---|---|---:| |
| | `hexgen_abc_v1/pairs.jsonl` | 133,238 (part, program) training records, one JSON object per line | 2,335 MB | |
| | `hexgen_abc_v1/holdout_graphs.tar.gz` | 10,179 `.brepgraph.json` — held-out CAD parts, never trained on | 188 MB raw | |
| | `hexgen_abc_v1/holdout_tess.tar.gz` | 10,179 `.tess.json` — the same parts triangulated, matched by filename | 186 MB raw | |
| | `hexgen_abc_v1/export_summary.json` | export provenance | 838 B | |
|
|
| A `.brepgraph.json` describes one CAD solid: faces with surface type and |
| parameters, edges with curves, vertices with positions, and the loops tying them |
| together. A `.tess.json` is that solid as triangles; the mesh-vs-CAD tools take |
| the two as a pair. |
|
|
| ```bash |
| uvx hf download hexproj-collab/hexgen-share --repo-type dataset --local-dir ./hexgen-data |
| cd hexgen-data/hexgen_abc_v1 |
| mkdir -p holdout_graphs holdout_tess |
| tar xzf holdout_graphs.tar.gz -C holdout_graphs |
| tar xzf holdout_tess.tar.gz -C holdout_tess |
| ``` |
|
|
| **Do not regenerate the `.tess.json` files.** They were produced by the CAD kernel |
| on x86 and are frozen; tessellation is not reproducible across architectures, so |
| rebuilding them on ARM silently changes every downstream score. |
|
|
