109 lines
4.2 KiB
Markdown
109 lines
4.2 KiB
Markdown
# GPS Momentum Field Tests
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Current patch surface: fixed additive penalty on ordinary GPS solver edge
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expansion, patched at the two ordinary relaxation callsites feeding
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`0x40ba58`. Live tuning is through `momentum_weights.bin`.
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## 2026-06-27 North Watson To Dogtown/Badlands
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Starting context: player in North Watson near the motel/Cassius area. The two
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main comparison routes fit in the same map viewport:
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- The Damned / Dogtown, south into Pacifica.
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- Fuel Station fast travel point in the southwest Badlands/Biotechnica flats.
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Screenshots:
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- `../logs/screenshots/the-damned-and-fuel-station-0.webp`
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- `../logs/screenshots/the-damned-and-fuel-station-8.webp`
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- `../logs/screenshots/the-damned-and-fuel-station-80.webp`
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Telemetry log:
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- `../logs/EdgeWeightGPS_live_momentum_ab_8_0_80.log`
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Results:
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| Route | Penalty | Expansion calls | Route records | Observed route |
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| --- | ---: | ---: | ---: | --- |
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| The Damned | 8 | 1,057,410 | 78 | Similar to vanilla; threads city blocks and a side highway. |
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| The Damned | 0 | 1,110,243 | 87 | Similar visible corridor, slightly more route-record churn. |
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| The Damned | 80 | 1,010,035 | 70 | Visibly smoother highway corridor, avoids City Center stair-stepping. |
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| Fuel Station | 8 | 296,976 | 89 | Uses City Center roundabout/city threading. |
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| Fuel Station | 0 | about 308k-314k | 90-92 | Similar visible corridor to 8. |
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| Fuel Station | 80 | about 345k-347k | 77-78 | Converges onto the smoother highway corridor before splitting south. |
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Interpretation:
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- `0` and `8` are close visually in this location, despite small telemetry
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changes.
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- `80` is a strong proof value: it changes the coarse corridor and reduces
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route-record count for the tested long routes.
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- This supports the main hypothesis that a fixed per-segment additive penalty
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can optimize for smoother player-driving corridors, not merely highway class.
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## 2026-06-27 Broad 80 Smoke
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Telemetry log:
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- `../logs/EdgeWeightGPS_momentum80_broad_smoke.log`
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- `../logs/EdgeWeightGPS_momentum80_drive_validation.log`
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User reported no bad routes after probing:
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- Claire routes differently than nearby Sinnerman, choosing a smooth Japantown
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highway leg.
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- Sinnerman still cuts through City Center, plausibly because that corridor is
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appropriate for that destination.
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- Short local routing to Cassius remains fine.
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- Heywood routes remain fine and may avoid some stair-stepping.
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- Routes near highways but not traffic-feasible still detour appropriately.
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- One NCPD bounty used a road the user had not previously seen GPS select, and
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it looked like a good fit.
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Interpretation:
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- No obvious local-route breakage was found at `80`.
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- `80` was not immediately pathological in the sampled routes and later became
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the working default after drive validation.
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- Higher values still need caution; `160` later proved too high.
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Drive validation at `80`:
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- The Damned / Dogtown route drove cleanly in the Outlaw at sustained high
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speed.
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- The route surfaced a back/elevated highway through Japantown/Westbrook that
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the user had not seen vanilla GPS select before.
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- Live minimap recalculation after a deliberate detour still worked.
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- Claire route also drove cleanly. One ramp/hill surprised the driver, but the
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issue was road unfamiliarity at full speed, not bad routing.
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Conclusion after the drive test: `80` is the working default.
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## 2026-06-27 40/160 Bounds
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Telemetry log:
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- `../logs/EdgeWeightGPS_momentum40_160_tuning.log`
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At `40`, the highlighted routes improved only partially:
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- Claire still used the Sinnerman/City Center path instead of the smoother outer
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road.
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- Sinnerman remained sensible.
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- The near-highway case remained acceptable.
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- The NCPD bounty took the smoother outer City Center road, but retained a
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Watson stair-step that `80` avoided.
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At `160`, overcorrection appeared:
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- Claire showed a questionable hairpin.
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- The Damned produced a fallback/straight-line style route instead of a usable
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road route.
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- The Gig/Cassius local access got worse, asking for a backtrack and hairpin
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instead of a simple nearby approach.
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- NCPD bounty regressed to stair-stepping.
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Conclusion: `160` is too high. The useful bracket is roughly `40 < default <
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160`, with `80` currently best validated by map inspection and driving.
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