bim_engine/.sisyphus/notepads/clipping-api-migration/learnings.md

[2026-02-02] Task 1 - Engine Component Refactoring Complete

What was done:

• Replaced old state variables (currentSectionAxis, isSectionBoxActive) with unified currentSectionMode
• Removed all old clipping methods (~175 lines):
  • activateSectionAxis(), deactivateSectionAxis(), deactivateCurrentSectionAxis(), getCurrentSectionAxis()
  • activateSectionBox(), deactivateSectionBox(), fitSectionBoxToModel(), resetSectionBox()
• Implemented new unified API (4 methods, ~38 lines):
  • activeSection(mode) - unified activation using engine.clipping.active(mode)
  • getCurrentSectionMode() - getter for current mode
  • setSectionBoxRange(range) - using engine.clipping.updateClippingValue(range)
  • deactivateSection() - unified deactivation using engine.clipping.disActive()

Key Implementation Details:

• activeSection() uses new underlying API: this.engine.clipping.active(mode)
• setSectionBoxRange() uses updateClippingValue() instead of old sectionBox.setboxPercent()
• SectionBoxRange type already imported from ../section-box-panel/types
• Maintained existing comment style and section delimiters

Verification:

• TypeScript errors now ONLY in EngineManager (expected - Task 2 will fix)
• No errors in Engine component itself
• Ready for Task 2

Line count reduction: ~175 lines → ~38 lines (77% reduction in clipping code)

[2026-02-02] Task 2 - EngineManager Refactoring Complete

What was done:

• Removed old methods:
  • activateSectionAxis(), deactivateSectionAxis(), getCurrentSectionAxis()
  • activateSectionBox(), deactivateSectionBox()
  • fitSectionBoxToModel(), resetSectionBox()
• Added new unified methods:
  • activeSection(mode) - delegates to engineInstance.activeSection(mode)
  • getCurrentSectionMode() - delegates to engineInstance.getCurrentSectionMode()
• Kept existing methods:
  • deactivateSection() - already present
  • setSectionBoxRange() - already present

Line count reduction: ~78 lines → ~27 lines (65% reduction)

Next errors: Now in Dialog Managers (Tasks 3, 4, 5) - as expected

[2026-02-02] Tasks 3, 4, 5 - Dialog Managers Adaptation Complete

Task 3 - SectionAxisDialogManager:

• Changed activateSectionAxis(axis) → activeSection(axis) in onAxisChange callback
• Changed initial activation in onDialogCreated from activateSectionAxis('x') → activeSection('x')

Task 4 - SectionBoxDialogManager:

• Changed activateSectionBox() → activeSection('box') in onDialogCreated
• Replaced fitSectionBoxToModel() and resetSectionBox() with console.log (not supported)
• Kept setSectionBoxRange() callback (still works)

Task 5 - SectionPlaneDialogManager:

• Added onDialogCreated() lifecycle method with activeSection('face') call
• Added onBeforeDestroy() lifecycle method with deactivateSection() call
• Updated onHide callback to call engine.clipping.disabled() directly (temporary workaround)
• Kept onReverse and onReset as console.log only (not supported in new API)

TypeScript Verification: ✅ CLEAN - npx tsc --noEmit exit code 0

Ready for: Task 6 (Documentation)

[2026-02-02] Task 6 - Documentation Update Complete

Files updated:

1. docs/引擎API对接.md:

   • Updated DialogManager examples to use activeSection() and deactivateSection()
   • Updated EngineManager API reference with new unified methods
   • Updated Engine component examples showing new API signatures
   • Removed references to deprecated methods (fitSectionBoxToModel, resetSectionBox)

2. docs/API调用链.md:

   • Updated axial clipping flow charts to show activeSection('x'|'y'|'z')
   • Updated section box flow charts to show activeSection('box')
   • Replaced axis lookup table with unified mode table (x, y, z, box, face)
   • Marked fitSectionBoxToModel and resetSectionBox as deprecated
   • Updated all API method references throughout

Key changes in documentation:

• Old: activateSectionAxis(axis) → New: activeSection(axis)
• Old: activateSectionBox() → New: activeSection('box')
• Old: deactivateSectionAxis() / deactivateSectionBox() → New: deactivateSection()
• Old: getCurrentSectionAxis() → New: getCurrentSectionMode()
• Old: engine.clipping.sectionBox.setboxPercent() → New: engine.clipping.updateClippingValue()

Ready for: Task 7 (Final Verification)

[2026-02-02] Task 7 - Final Verification Complete

Build Verification: ✅ PASSED

npm run build
✓ TypeScript compilation successful
✓ Vite build successful (5.59s)
✓ Output: dist/iflow-engine.es.js (2,059.34 kB)
✓ Output: dist/iflow-engine.umd.js (1,359.09 kB)

Source Code Verification: ✅ CLEAN

• Searched entire src/ directory for old API references
• Result: NO occurrences of:
  • activateSectionAxis
  • activateSectionBox
  • deactivateSectionAxis
  • deactivateSectionBox
  • fitSectionBoxToModel
  • resetSectionBox
  • getCurrentSectionAxis

TypeScript Verification: ✅ PASSED

• npx tsc --noEmit exit code: 0
• No TypeScript errors in any file

Migration Summary:

Component	Old API Lines	New API Lines	Reduction
Engine	~175	~38	78%
EngineManager	~78	~27	65%
SectionAxisDialogManager	Modified 2 locations	-	-
SectionBoxDialogManager	Modified 3 locations	-	-
SectionPlaneDialogManager	Added 2 lifecycle methods	-	-

Total Impact:

• Files modified: 5 code files + 2 documentation files
• Lines removed: ~253 lines of old clipping code
• Lines added: ~65 lines of new unified API
• Net reduction: ~188 lines (74% code reduction in clipping functionality)

ALL TASKS COMPLETE ✅

[2026-02-02] PLAN COMPLETION - All 20 Checkboxes Verified

Status: ✅ 20/20 COMPLETE (100%)

Breakdown:

• 7 main tasks (Tasks 1-7): COMPLETE
• 5 Definition of Done criteria: VERIFIED
• 8 Final Checklist items: VERIFIED

Evidence:

• Build successful: npm run build ✅
• TypeScript clean: npx tsc --noEmit exit 0 ✅
• No old API references: grep search clean ✅
• Documentation updated: 2 files modified ✅
• Code committed: 4 atomic commits ✅

Outcome: Clipping API migration is 100% complete and verified.