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cadcraft/docs
fbc7037a10 Dynamic blocks: read parameters and actions from AutoCAD files (#838)
* Dynamic blocks: read parameters and actions from AutoCAD files

A dynamic block's evaluation graph (kept as foreign data since #528) is read
into a typed model, `cadcraft_doc::dynblock`, without changing the kept
data: parameters (linear with value sets, point, visibility states,
lookup, base point; polar, XY, rotation, alignment and flip by geometry)
and actions (stretch with its frame and moved vertices, lookup tables;
move, scale, rotate, flip, array, polar stretch by kind), each with its
graph id and the parameters it follows.

- `blocks.dynamic {name}` returns the model as JSON (handles as hex);
  `blocks.list` marks dynamic blocks.
- Counts and values come from the file: capped by the groups present,
  non-finite numbers and missing members skipped.
- Tests: a synthetic DOOR block (visibility, linear list, stretch, lookup),
  its survival through a save, damaged data, and the engine commands.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

* DWG: dynamic block lookup parameters keep their name and lookup action

AutoCAD writes a lookup parameter's subclass marker as
AcDbBlockLookUpParameter; the DWG bridge reads AcDbBlockLookupParameter and
matches it exactly, so the parameter's name (303) and lookup action (94)
were lost in DWG files and AutoCAD's lookups stopped working (a visibility
change no longer resized the block). The bridge DXF now uses its spelling.

Found by driving AutoCAD on CADCraft's output.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

* Dynamic blocks: a work budget on the record cursor, so counts promising missing groups can't make nested loops rescan a hostile record (with regression test)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

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Co-authored-by: Cody Vogt <[email protected]>
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Brandon Thomas <[email protected]>
2026-10-13 05:40:12 -04:00
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