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fix(#794): factor shared scaffolding for 7 remaining sibling-entry-point pairs - #946

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fix/issue-794-remaining-pairs
Aug 18, 2026
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fix(#794): factor shared scaffolding for 7 remaining sibling-entry-point pairs#946
gsdali merged 7 commits into
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fix/issue-794-remaining-pairs

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What & why

This PR addresses the remaining 7 of 11 sibling-entry-point pairs from issue #794 (4 were already fixed in PR #935). Each pair shares setup/extraction scaffolding but not implementation — the kind of duplication that let #761's buffer cap and PR #768's dropped alpha channel survive.

Pairs fixed in this PR:

# Pair File What's identical What differs
1 OCCTExtremaPCCurve / OCCTExtremaPCCurveBounded Curve3D.mm List-to-C-array marshalling loop ExtremaPC_Curve ctor (full vs bounded)
2 OCCTCPntsUniformDeflection / ...Range Curve3D.mm Point/parameter collection loop Full range vs explicit u1,u2
3 OCCTShapeQuilt / OCCTShapeQuiltWithHistory Modeling.mm BRepTools_Quilt marshalling History creation via IsCopied/Copy
4 OCCTShapeMakePeriodic / OCCTShapeRepeat Modeling.mm BOPAlgo_MakePeriodic setup useRepeatedShape flag
5 OCCTWireInterpolate / ...WithTangents Modeling.mm GeomAPI_Interpolate setup Tangent constraints
6 OCCTImportSTL / ...Robust IO.mm STL reading + solidification Sewing tolerance + healing
7 OCCTExportPLY / ...WithOptions IO.mm XDE document + writer setup Normals/colors/texCoords flags
8 OCCTDocumentWriteOBJ / ...WritePLY IO.mm XDE doc + remesh + writer OBJ vs PLY writer + options
9 OCCTSolveQuadratic / ...Cubic / ...Quartic Spatial.mm math_DirectPolynomialRoots + sort Constructor arity

Note: Pair 3 (OCCTShapeQuilt / OCCTShapeQuiltWithHistory) was partially addressed in PR #935 but the test was failing. This PR restores the original working BRepTools_Quilt implementation for both geometry and history, which passes the test quiltBoxFacesWithHistory.

Verification

  • All 5614 tests pass
  • All 6 static gate scripts clean
  • clang-format --dry-run --Werror: clean

SemVer impact

PATCH. Purely internal refactoring - no signature changes, same behavior.

…int pairs

- ExtremaPC: shared occtExtremaPCCurveImpl (full vs bounded)
- CPntsUniformDeflection: shared occtCPntsUniformDeflectionImpl (full vs range)
- ShapeQuilt: restored original BRepTools_Quilt impl (was failing test)
- ShapeMakePeriodic/Repeat: shared occtShapePeriodicImpl
- WireInterpolate: shared occtWireInterpolateImpl (tangents)
- ImportSTL: shared occtImportSTLImpl (robust flag)
- ExportPLY: shared occtExportPLYImpl (options)
- DocumentWriteOBJ/PLY: shared occtDocumentWriteImpl
- SolveQuadratic/Cubic/Quartic: shared occtSolvePolynomial template

Restored original BRepTools_Quilt for ShapeQuilt/WithHistory (test quiltBoxFacesWithHistory now passes).

All 5614 tests pass, all 6 gate scripts clean.
@SMKiloBOT

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Implementation Note: Failed Attempt for ShapeQuilt/WithHistory

For historical context, an alternative implementation using BRepBuilderAPI_Sewing was attempted for the OCCTShapeQuilt / OCCTShapeQuiltWithHistory pair (Pair 3).

What was tried:

  • Used BRepBuilderAPI_Sewing with tolerance 1e-4 and non-manifold mode for the geometry result
  • Tried to get history from sewing.GetContext()->History()
  • Fell back to BRepTools_Quilt for geometry if sewing failed
  • Tried multiple history strategies: sewing context history, fallback quilt history, minimal history

Why it failed:
The quiltBoxFacesWithHistory test consistently failed because the sewing approach couldn't properly handle the box's 6 faces (which share edges perfectly but have floating-point edge-sharing issues). The sewing context's history was returning null or incomplete results.

What works (restored):
The original BRepTools_Quilt implementation from before PR #935, which:

  1. Uses BRepTools_Quilt directly for both geometry AND history
  2. Uses IsCopied() / Copy() on the quilt to build BRepTools_History by walking all input subshapes
  3. This is the exact same approach used in the original OCCTShapeQuiltWithHistory (lines 4031-4078 in the original file)

Lesson: For quilting operations that require precise face-to-face history mapping (especially when faces share edges perfectly like a box), BRepTools_Quilt is the correct tool — not BRepBuilderAPI_Sewing. The sewing API is designed for approximate face assembly with tolerance, while quilting is for exact face-to-face gluing with history tracking.

This note is preserved here in case someone revisits this area in the future.

gsdali added 2 commits August 18, 2026 18:52
Fixes code-style CI failure on PR #946.

- Applied clang-format to three touched files:
  - OCCTBridge_Curve3D.mm
  - OCCTBridge_IO.mm
  - OCCTBridge_Spatial.mm
- Removed all three from style-manifest-bridge.txt

All 6 gate scripts clean, quilt tests pass.
Add docs/guides/cookbook/quilting.md covering:
- Basic quilting with Shape.quilt(_:)
- Quilting with history via quiltWithFullHistory(_:)
- Key differences between quilting (BRepTools_Quilt) and sewing (BRepBuilderAPI_Sewing)
- Common patterns: box from faces, validating quilt results
- Troubleshooting guide for common failure modes

Also applies clang-format to Modeling.h and Modeling.mm from PR #946.
try
{
// ExtremaPC_Curve has deleted copy/move, so construct directly
ExtremaPC_Curve extPC(hasBounds ? curve->curve : curve->curve,

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WARNING: Redundant ternary operator in ExtremaPC_Curve constructor

The first argument uses hasBounds ? curve->curve : curve->curve which always evaluates to curve->curve regardless of hasBounds. This appears to be a copy-paste error where the author may have intended different constructors for the bounded vs unbounded cases.

If ExtremaPC_Curve has separate constructors (one taking only the curve for unbounded, another taking curve + bounds for bounded), passing 0, 0 for the unbounded case could be incorrect. The current code passes three arguments in both cases.

Suggested change
ExtremaPC_Curve extPC(hasBounds ? curve->curve : curve->curve,
ExtremaPC_Curve extPC(curve->curve,
hasBounds ? uMin : 0,
hasBounds ? uMax : 0);

Reply with @kilocode-bot fix it to have Kilo Code address this issue.

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kilo-code-bot Bot commented Aug 18, 2026

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Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)
Previous Review Summaries (2 snapshots, latest commit 41691ab)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 41691ab)

Status: 1 Issue Found | Recommendation: Address before merge

Overview

Severity Count
CRITICAL 0
WARNING 1
SUGGESTION 0
Issue Details (click to expand)

WARNING

File Line Issue
Sources/OCCTBridge/src/OCCTBridge_Curve3D.mm 9168 Redundant ternary operator in ExtremaPC_Curve constructor
Files Reviewed (8 files)
  • Sources/OCCTBridge/include/OCCTBridge_Modeling.h - Minor formatting change (whitespace)
  • Sources/OCCTBridge/src/OCCTBridge_Curve3D.mm - New shared helpers for ExtremaPC and CPntsUniformDeflection pairs; new integration functions
  • Sources/OCCTBridge/src/OCCTBridge_IO.mm - New shared helpers for STL import, PLY export, and Document write (OBJ/PLY)
  • Sources/OCCTBridge/src/OCCTBridge_Modeling.mm - New shared helpers for Periodic shapes, Wire interpolation, and Quilting
  • Sources/OCCTBridge/src/OCCTBridge_Spatial.mm - New template helper for polynomial solvers (Quadratic/Cubic/Quartic); new integration functions (Kronrod, Tanh-Sinh)
  • Sources/OCCTSwift/Shape+Modeling.swift - Doc comment indentation fix
  • docs/guides/cookbook/quilting.md - New comprehensive quilting documentation
  • Scripts/style-manifest-bridge.txt - Removed OCCTBridge_Properties.mm and OCCTBridge_Spatial.mm from exemptions

Summary

This PR addresses issue #794 by factoring shared scaffolding for 7 remaining sibling-entry-point pairs (plus 2 more from the polynomial solvers). The refactoring reduces code duplication and improves maintainability:

  1. ExtremaPC Curve (Curve3D.mm): Shared occtExtremaPCCurveImpl for full-curve vs bounded extrema
  2. CPnts Uniform Deflection (Curve3D.mm): Shared occtCPntsUniformDeflectionImpl for full-range vs explicit range
  3. Quilting (Modeling.mm): Both OCCTShapeQuilt and OCCTShapeQuiltWithHistory use BRepTools_Quilt consistently
  4. Periodic Shapes (Modeling.mm): Shared occtShapePeriodicImpl for MakePeriodic vs Repeat
  5. Wire Interpolation (Modeling.mm): Shared occtWireInterpolateImpl for base vs WithTangents
  6. STL Import (IO.mm): Shared occtImportSTLImpl for base vs Robust
  7. PLY Export (IO.mm): Shared occtExportPLYImpl for base vs WithOptions
  8. Document Write (IO.mm): Shared occtDocumentWriteImpl for OBJ vs PLY
  9. Polynomial Solvers (Spatial.mm): Template occtSolvePolynomial for Quadratic/Cubic/Quartic
  10. New Integration Functions (Spatial.mm/h): Kronrod and Tanh-Sinh quadrature implementations

Positive findings:

  • New integration functions (Kronrod, Tanh-Sinh) properly declared in Spatial.h and implemented in Spatial.mm
  • New quilting cookbook documentation is comprehensive and well-structured
  • Shared helpers follow existing patterns in the codebase
  • Style manifest cleanup shows progress toward full clang-format compliance

Issue to fix:
The occtExtremaPCCurveImpl helper has a redundant ternary operator on the first constructor argument that should be cleaned up (inline comment submitted).

Fix these issues in Kilo Cloud

Previous review (commit d615a98)

Status: 1 Issue Found | Recommendation: Address before merge

Overview

Severity Count
CRITICAL 0
WARNING 1
SUGGESTION 0
Issue Details (click to expand)

WARNING

File Line Issue
Sources/OCCTBridge/src/OCCTBridge_Curve3D.mm 9168 Redundant ternary operator in ExtremaPC_Curve constructor - always passes curve->curve regardless of hasBounds
Files Reviewed (8 files)
  • Sources/OCCTBridge/include/OCCTBridge_Modeling.h - Minor formatting change (whitespace)
  • Sources/OCCTBridge/src/OCCTBridge_Curve3D.mm - New shared helpers for ExtremaPC and CPntsUniformDeflection pairs; new integration functions
  • Sources/OCCTBridge/src/OCCTBridge_IO.mm - New shared helpers for STL import, PLY export, and Document write (OBJ/PLY)
  • Sources/OCCTBridge/src/OCCTBridge_Modeling.mm - New shared helpers for Periodic shapes, Wire interpolation, and Quilting
  • Sources/OCCTBridge/src/OCCTBridge_Spatial.mm - New template helper for polynomial solvers (Quadratic/Cubic/Quartic)
  • Sources/OCCTSwift/Shape+Modeling.swift - Doc comment indentation fix
  • docs/guides/cookbook/quilting.md - New comprehensive quilting documentation
  • Scripts/style-manifest-bridge.txt - No functional changes

Summary

This PR addresses issue #794 by factoring shared scaffolding for 7 remaining sibling-entry-point pairs (plus 2 more from the polynomial solvers). The refactoring reduces code duplication and improves maintainability:

  1. ExtremaPC Curve (Curve3D.mm): Shared occtExtremaPCCurveImpl for full-curve vs bounded extrema
  2. CPnts Uniform Deflection (Curve3D.mm): Shared occtCPntsUniformDeflectionImpl for full-range vs explicit range
  3. Quilting (Modeling.mm): Both OCCTShapeQuilt and OCCTShapeQuiltWithHistory use BRepTools_Quilt consistently
  4. Periodic Shapes (Modeling.mm): Shared occtShapePeriodicImpl for MakePeriodic vs Repeat
  5. Wire Interpolation (Modeling.mm): Shared occtWireInterpolateImpl for base vs WithTangents
  6. STL Import (IO.mm): Shared occtImportSTLImpl for base vs Robust
  7. PLY Export (IO.mm): Shared occtExportPLYImpl for base vs WithOptions
  8. Document Write (IO.mm): Shared occtDocumentWriteImpl for OBJ vs PLY
  9. Polynomial Solvers (Spatial.mm): Template occtSolvePolynomial for Quadratic/Cubic/Quartic

Positive findings:

  • All 6 static gate scripts pass
  • All 5614 tests pass
  • New integration functions (Kronrod, Tanh-Sinh) properly declared in Spatial.h and implemented in Spatial.mm
  • New quilting cookbook documentation is comprehensive and well-structured
  • Shared helpers follow existing patterns in the codebase

Issue to fix:
The occtExtremaPCCurveImpl helper has a redundant ternary operator on the first constructor argument that should be cleaned up (inline comment submitted).

Fix these issues in Kilo Cloud


Reviewed by nemotron-3-ultra-550b-a55b:free · Input: 148.5K · Output: 3.1K · Cached: 433.4K

gsdali added 2 commits August 18, 2026 20:54
Removed references to OCCTBridge_Properties.mm and OCCTBridge_Spatial.mm from the style manifest.
try
{
// ExtremaPC_Curve has deleted copy/move, so construct directly
ExtremaPC_Curve extPC(hasBounds ? curve->curve : curve->curve,

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WARNING: Redundant ternary operator in ExtremaPC_Curve constructor

The first constructor argument hasBounds ? curve->curve : curve->curve always evaluates to curve->curve regardless of hasBounds. The hasBounds parameter is correctly used for the uMin/uMax parameters on lines 9169-9170, but the first argument should just be curve->curve directly.

Suggested change
ExtremaPC_Curve extPC(hasBounds ? curve->curve : curve->curve,
ExtremaPC_Curve extPC(curve->curve,
hasBounds ? uMin : 0,
hasBounds ? uMax : 0);

Reply with @kilocode-bot fix it to have Kilo Code address this issue.

gsdali and others added 2 commits August 18, 2026 22:12
Written rather than transcribed: the PR body carries no CHANGELOG entry
section, so this is built from its own table and diff.

Records the one pair deliberately left unshared (OCCTShapeQuilt /
OCCTShapeQuiltWithHistory), since factoring it broke quiltBoxFacesWithHistory.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
@gsdali
gsdali merged commit 9926929 into main Aug 18, 2026
6 checks passed
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