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fix(physics): port retail stair edge backprobe

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Erik 2026-07-31 09:26:28 +02:00
parent 5a0f9868a6
commit 2dcb4f1d94
6 changed files with 218 additions and 6 deletions
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10
docs/plans/2026-07-29-physics-parity-campaign.md
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@ -389,6 +389,16 @@ root-caused, retail-ported, and user-accepted in the same session:
are now ported, focused/full gates pass, and the user accepted repeated
slope jumps. Evidence:
`docs/research/2026-07-31-269-slope-stop-capture.md`.
- **#271 closed 2026-07-31** — a bounded stair-side
trace proved ACDream could bypass retail's current-position edge back-probe
by promoting a stale `LastWalkable` tread. That made PrecipiceSlide reverse
an uphill tangent and rapidly carry the player down the stairs. The two
stale-history substitutions are removed; current-walkable, back-probe, and
no-walkable outcomes now follow `CTransition::edge_slide @ 0x0050B3D0`.
The exact captured frame is pinned in the existing installed-stair fixture
and the complete Release suite passes 10,062 tests / 5 skips. The user
accepted repeated uphill runs while pressing into the stair sides. Evidence:
`docs/research/2026-07-31-271-stair-side-slide-capture.md`.
Matrix rows accepted so far: speed parity, roof slide, downhill bounce,
flat pop, uphill landing, and #269's slope-stop feel