| # MeshLex-Tokens |
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| Per-mesh token sequence dataset for autoregressive 3D mesh generation. |
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| ## Overview |
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| Each row contains a complete mesh encoded as a token sequence with BOS/EOS delimiters. |
| Three token formats are provided for ablation comparison. |
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| **Total meshes**: 140140 |
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| ## Vocabulary (2372 tokens) |
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| | Token Type | ID Range | Count | |
| |---|---|---| |
| | PAD | 0 | 1 | |
| | BOS | 1 | 1 | |
| | EOS | 2 | 1 | |
| | SEP | 3 | 1 | |
| | Position bins | 4-259 | 256 | |
| | Scale bins | 260-323 | 64 | |
| | Codebook indices | 324-2371 | 2048 | |
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| ## Formats |
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| - **spatial_header_c2f**: Spatial header (all positions/scales) + C2F body (codebook by level). Length: 8N+6. |
| - **enhanced_flat**: Per-patch complete tokens (pos + scale + all codebook levels). Length: 8N+2. |
| - **enhanced_interleaved**: Per-level sections with repeated spatial context. Length: 20N+5. |
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| ## Schema |
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| | Column | Type | Description | |
| |---|---|---| |
| | mesh_id | string | Unique mesh identifier | |
| | token_ids | list[int] | Complete token sequence | |
| | seq_len | int | Sequence length | |
| | n_patches | int | Number of patches in mesh | |
| | tier | string | Quality tier (gold/silver) | |
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| ## Source |
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| Built from [Pthahnix/MeshLex-Patches](https://huggingface.co/datasets/Pthahnix/MeshLex-Patches) |
| using VQ-VAE checkpoint `pca_k2048_l4_d128` (val_recon=0.1391). |
| |
| ## Coordinate Normalization |
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| Per-mesh center + bounding sphere scale normalization → [-1, 1]³. |
| Position quantization: 256 bins. Scale quantization: 64 bins. |
| Patch ordering: Morton Z-order. |
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