thejayman77
8d942a88b4
- Surface tilt magnitude stays visible 0-180 degrees; never blanked by placement. Lock is self-gating (only near-zero magnitude can enter), so the placement gate now drives hints only. Edge gating unchanged. - Pitch/Roll suppressed as ambiguous at >=80 degrees; explicit screen-down state past 90 degrees with the true magnitude retained. - SurfacePresentationDetector classifies from the same deadbanded stable magnitude the UI displays, with 1-degree hysteresis at both boundaries and a direct face-up -> screen-down transition. - Tests: angle sweep (30/80/near-vertical/screen-down), hysteretic boundary tests, and a sustained 30-degree run proving a steep phone never locks or fires feedback. 43 tests passing. Audited-by: Claude (2 findings raised and resolved) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
On the Level
Offline-first Android pocket toolset: a trustworthy level, angle meter, and calibrated screen ruler (Pro). Kotlin + Jetpack Compose, single module, no backend.
- BRIEF.md — the authoritative v1 product & technical brief
- AUDIT.md — audit of the brief; the amendments it lists are incorporated
- resources/ — concept board (visual direction)
Building
Open in Android Studio, or:
./gradlew assembleDebug # build
./gradlew testDebugUnitTest # measurement-math unit tests
Scaffold status
The project skeleton follows BRIEF.md §Sensor and measurement architecture. Implemented and tested:
core/sensors— sensor selection (game rotation vector → gravity → low-passed accelerometer), device-frame gravity stream, and the pure measurement math: orientation mapping, two-sample per-mode calibration (derived in angle space, applied in vector space so it stays correct away from zero), EMA smoothing, lock hysteresis/dwell/debounce, display deadband, placement validity, and the sensor-vector contract (all sources emit device-frame world-up; flat = +9.81 on Z, pinned bySensorContractTest). All unit-tested.core/settings— DataStore preferences and per-mode calibration persistence.core/billing— entitlement interface with a stub (free-tier) implementation.feature/level,feature/angle— live numeric scaffolds wired to the real sensor pipeline, with manual Surface|Edge selection, placement-validity hints, lock state (locked label states the tolerance so it can never contradict the rounded readout), and directional hold-to-zero (vector reference, not magnitude subtraction).feature/ruler,feature/tools— static placeholders.
Not yet implemented (deliberately — see TODO markers):
- The tactile vial visuals and the spring-animated display value (value 3 of 3 in the brief); scaffold screens render the deadbanded stable value directly.
- Guided calibration flow UI (math and persistence are done).
- Edge-mode readout counter-rotation on the portrait-locked activity.
- Play Billing implementation of
ProEntitlementRepository. - Screen ruler measurement UI and per-display scale persistence.
- Audio cue, reduced-motion behaviors, preferences UI.