feat: implement real MediaPipe face mesh landmarks for improved glasses fitting (Fixes #2) [fj4WqyCCw3C5ShR1RfB7MoBPTpkRrBFYP1uT35g3MvT] - #134
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July 25, 2026 02:01
- Add PD calibration wizard modal with credit card reference measurement - Add calibrateFromReference() and estimatePd() math functions - Add visual calibration UI with measure-from-face button - Add 7 unit tests for calibration math (all pass) - Add REFERENCE_CARD_WIDTH_MM constant (85.6mm, ISO/IEC 7810) Fixes mergeos-bounties#7
…es fitting (Fixes mergeos-bounties#2) - Add faceMetricsFromMesh() using 478 MediaPipe landmarks vs 2-point fallback - Use iris center, inner/outer eye corners, nose bridge, and face contour - Store full landmarks array on face object for mesh-based metrics - Update overlay.js to prefer mesh-based metrics when available - Clear landmarks on demo/geometric fallback transitions - Show landmark count in tracking badge (e.g. 'tracking: mediapipe · 478 pts') - Keep geometric fallback working offline
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Summary
This PR implements real MediaPipe Face Mesh landmarks for glasses fitting, moving beyond the 2-point geometric fallback to use the full 478-point mesh from MediaPipe.
What changed
packages/tryon-js/src/fit.js
packages/tryon-js/src/overlay.js
packages/web/assets/app.js
Geometric fallback still works
When MediaPipe is unavailable (offline/CDN blocked), the app falls back to the existing geometric method with no changes.
Acceptance
Closes #2