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74 lines
3.5 KiB
Markdown
74 lines
3.5 KiB
Markdown
# Design (CAD) tab — upstream pull request
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## What this adds
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A sketch-first parametric CAD tab inside the slicer. The workflow is direct:
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sketch → constrain → solid features → commit to plate. The whole feature recipe is
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persisted inside the 3MF, so reopening restores an editable model rather than a frozen mesh.
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- Kernel: OCCT, which upstream already links for STEP import — see
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[cad_dependency_weight.md](docs/cad_dependency_weight.md)
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- Constraint solver: vendored SolveSpace `libslvs` subset
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- Interaction model: object-driven — point at geometry, the geometry offers the verbs that
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apply to it; see [cad_ux_guidelines.md](docs/cad_ux_guidelines.md)
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- Full user-facing documentation: [design_tab.md](docs/design_tab.md)
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## Why it belongs in the slicer
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Every round trip through an external CAD tool costs a file export, a re-import, and the
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design intent that both steps discard. A part modified after slicing should return to its
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feature history, not to a mesh. Keeping the CAD model inside the slicer preserves that
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loop — the nozzle diameter, the build volume and the material are known at design time.
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For the integration case in full: [design_tab_upstream_portability.md](docs/design_tab_upstream_portability.md).
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## How it is built
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The `SLIC3R_CAD` CMake flag (default ON) gates the entire tab. With it OFF the tab is not
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compiled and the deps prefix matches upstream exactly — the dependency diff is one line in
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OCCT's CMake: `BUILD_MODULE_ModelingAlgorithms=OFF → ON`.
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Measured cost table: [cad_dependency_weight.md](docs/cad_dependency_weight.md).
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## Diff shape
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<!-- fork-specific: measured against this fork's upstream base; re-run the commands above after mirroring -->
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Against merge-base `d6cb667b894f`:
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306 files changed, 83032 insertions(+), 777 deletions(-)
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350 commits, of which 284 are new files and 37 modify upstream files. 99.3 % of the diff
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is new code. The negotiable surface is the 37 modified files.
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## Tests
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205 `TEST_CASE` blocks across 6 new test source files. This counts assertions written, not
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assertions passed — a run needs a build.
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`scripts/CAD/run-kernel-tests.sh` is the headless verification contract: it builds only
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`libslic3r_tests` (not the GUI app), needs no display, and exit 0 means the CAD suite
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passed. It now runs with **no exclusions** — both cases that used to be quarantined (the
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circle-line tangency solver abort and the internal-thread reference) are fixed.
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## Licensing
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The vendored solver in `src/libslic3r/slvs/` is **GPL-3.0** (see `src/libslic3r/slvs/LICENSE`),
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not LGPL. The combined work is distributable under AGPL-3.0. See the Licensing section of
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[design_tab_upstream_portability.md](docs/design_tab_upstream_portability.md) for the
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AGPLv3/GPLv3 compatibility argument; this point should be confirmed with upstream explicitly.
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## Not verified
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- Card wiring for 9 of the 16 late-wired tools was never click-tested.
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- There is no automated GUI test in CI. A green kernel run says nothing about the GUI —
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synthetic clicks never drift, so the test suite and the viewport are two separate realities.
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- The click-test defect rate has **not converged**: a second pass found no new defects, but
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four further days of work found five more. The earlier pass is not evidence of stability.
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## Reviewer's map
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See the [Where the code lives](docs/design_tab.md#where-the-code-lives) table in the user
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doc for the file-to-role mapping, and [docs/ux/tool_atlas.json](docs/ux/tool_atlas.json) as
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the generated-from source of `src/slic3r/GUI/CAD/DesignOffer.hpp`.
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