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docs(roadmap): A4 shipped + #90 cell-tracking ping-pong filed

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Phase A4 (multi-cell BSP iteration) ships in three commits (e6369e2,
493c5e5, 691493e — with revert 3add110 + reapply during visual
verification that proved A4 is not the cause of the issue surfaced).
1139 + 8 baseline maintained. 10 new unit tests pass. Wires retail's
CTransition::check_other_cells (acclient_2013_pseudo_c.txt:272717-272798)
into Transition.FindEnvCollisions.

Visual verification at the Holtburg inn vestibule surfaced a separate,
pre-existing M2 blocker (filed as #90): CellId ping-pongs between
outdoor 0xA9B40022 and indoor 0xA9B40164 on every wall push-back
because the push-back exits the indoor CellBSP volume, causing the
resolver to flip back to outdoor and bypass walls on outdoor ticks.
Indoor BSP results (Collided/Adjusted/Slid all firing) prove walls ARE
detected when the player is indoor; the aggregate "walls walk through"
appearance comes from CellId classification instability, not from
collision detection.

Bug reproduces fully with A4 reverted (launch-revert2.log captured 18
cell-id flips between 0xA9B40022 ↔ 0xA9B40164, 11 inside=True
building-transit events, 61 indoor-bsp queries firing the full
result distribution). A4 is correct and tested but dormant in
practice until #90 is fixed.

Updates:
  - docs/research/2026-05-20-phase-a4-shipped-cell-pingpong-finding.md (new)
  - docs/plans/2026-04-11-roadmap.md (A4 shipped row added)
  - CLAUDE.md (Indoor walking Phase A4 paragraph + next-step pointer
    to #90 with retail oracle anchor at acclient_2013_pseudo_c.txt:308742-308783)
  - docs/ISSUES.md (#90 filed, HIGH severity, M2-blocker)
  - docs/research/2026-05-21-open-items-pickup-prompt.md (landscape
    table updated — A4 closed, #90 promoted to top blocker)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-20 20:10:29 +02:00
parent 691493e579
commit 1534990102
5 changed files with 281 additions and 4 deletions
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9
docs/research/2026-05-21-open-items-pickup-prompt.md
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@ -6,14 +6,15 @@ relate, what depends on what, what order makes sense.
The pasteable session-start prompt is at the bottom of this doc.
## The landscape at a glance
## The landscape at a glance (updated 2026-05-20)
| # | Item | Domain | Depends on | M2-blocker? |
|---|---|---|---|:---:|
| A4 | Walls walk-through in vestibule cells — multi-cell BSP iteration | Collision | — | **YES** |
| stairs | Stairs walk-through — likely falls out of A4 | Collision | A4 | YES (if still broken after A4) |
| **#90 ping-pong** | **NEW TOP BLOCKER** — CellId flips between outdoor `0xA9B40022` and indoor vestibule `0xA9B40164` on each wall push-back at the inn doorway; user perceives "walls walk through everywhere" | Collision — cell tracking | — | **YES** (M2) |
| A4 | ~~Walls walk-through in vestibule cells — multi-cell BSP iteration~~ | Collision | — | **CLOSED 2026-05-20** (shipped, but dormant in practice until #90 is fixed) |
| stairs | Stairs walk-through — likely same root cause as #90 (also a doorway-edge geometry issue) | Collision | #90 | YES (likely subsumed by #90) |
| A2 | PHSP inversion — `polygon_hits_sphere` early-return logically inverted vs retail | Collision math | — | Low (subtle correctness only) |
| A3 | Synthesis removal — delete `TryFindIndoorWalkablePlane`, rely on retail CP retention | Architectural | A4 + A2 | No (cleanup, retail-faithful) |
| A3 | Synthesis removal — delete `TryFindIndoorWalkablePlane`, rely on retail CP retention | Architectural | A4 + #90 + A2 | No (cleanup, retail-faithful) |
| L-indoor | Lighting indoors broken | Rendering | — | No (M7 polish) |
| L-spotlight | Items projecting spotlight on walls | Rendering | — | No (M7 polish) |