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Tommaso BianchiandClaude Opus 4.8 8aea63a919 docs: rewrite the upstream brief from measurement, correcting two errors 
The 2026-06-21 assessment was written before the persistence work landed and
got two load-bearing facts wrong. Both are corrected here against the branch
itself rather than from recollection:

1. It called OCCT "a dependency mainline OrcaSlicer has never carried" and
   built its whole conclusion on that. False: deps/OCCT/ exists at the
   merge-base, and upstream already links it from Format/STEP.cpp,
   Format/svg.cpp and Shape/TextShape.cpp. The real dependency diff is one
   line -- BUILD_MODULE_ModelingAlgorithms OFF -> ON -- costing a measured
   3.77 MiB of Windows DLLs (TKFillet + TKOffset; TKBool already arrives
   transitively via DataExchange).

2. It described the vendored SolveSpace solver as LGPL. False:
   src/libslic3r/slvs/LICENSE is GPL-3.0. Harmless for us, but a licence
   must not be misstated in a document aimed at upstream.

It also claimed no changes to Model, which stopped being true when 3MF
recipe persistence added a std::string there.

The rewrite replaces prose estimates with counted figures: 138 new files,
23 modified upstream files at +457/-75, nothing deleted, 99.3 % of the diff
in new files. That reframes the ask from "adopt a CAD kernel" to "widen a
build flag you already carry", which is the argument that actually has a
chance upstream.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
 2026-07-22 20:16:31 +02:00
Tommaso BianchiandClaude Opus 4.8 0f4060c0a9 Orca-Cad: port SnapOrca Design (parametric CAD tab) onto mainline OrcaSlicer 
Grafts the sketch-first CAD environment from snaporca-cad onto the mainline
OrcaSlicer/OrcaSlicer base (vs snaporca's Snapmaker/OrcaSlicer base):
- 133 new files: CadDocument/SketchEngine/GeometryEngine/SketchConstraints/
  SketchSolver/SketchInference/ThreadStandards + vendored libslvs solver;
  DesignPanel/DesignCanvas/DesignSketchTool/SketchInlineEditor GUI; GLGizmo
  Primitive/Sketch; 75 design icons; Catch2 tests.
- Integration hooks ported to mainline's diverged versions: Design tab in
  MainFrame, embedded design viewport + sketch overlay + per-canvas chrome
  suppression in GLCanvas3D/PartPlate, gizmo registration, Plater accessors,
  CMake wiring (libslvs subdir, CAD sources, OCCT ModelingAlgorithms=ON).

Structural integration complete; build verification pending.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
 2026-06-28 12:40:38 +02:00