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aldozarandClaude Opus 5.5
e9d8462828
From AutoCAD 2013 on, a 3DSOLID, REGION or BODY doesn't carry its ACIS geometry: the binary SAB lives in the file's data store section (ACDSDATA), one ACDSRECORD per entity bound by a 320 handle. CADCraft kept those entities (as unknown entities, with their handles) but dropped the section, so a drawing saved as DWG or DXF had empty solids, and saving reported them as not saved. - doc: Foreign::data_store keeps the section's groups as read; data_store_entities() lists the entities it has records for. - io: the reader keeps the section; the writer puts it back for files of 2013 and later (and in the DXF the DWG bridge converts, which acadrust reads into the DWG), without the records of entities no longer written. Nothing is written for older files or when no record's entity remains. - engine: not_saved_as(d, version): from 2013 a solid, region or body with a data store record isn't reported; saves and document.bytes pass the version being written. On a 39,600-object permit set with 625 3D solids and 2 regions, DWG -> CADCraft -> DWG now keeps all 627 bodies with byte-identical SAB (before: none), and the save no longer reports them. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>