The capture apparatus pays off on the FIRST iteration. Three records
sampled from a live cottage-cellar session — tick 0 (spawn at Z=92.53),
tick 376 (player on the cellar ramp at Z=91.49), and tick 1183 (first
cap event, foot Z=92.74 with cn=(0,0,-1)) — replayed against the
harness engine reveal:
- LiveCompare_Tick0_Spawn: PASSES (full round-trip).
- LiveCompare_Tick376_OnRamp: PASSES (ramp walkable
polygon hydrates correctly,
engine reproduces live).
- LiveCompare_FirstCap_HeadHitsCottageFloor: FAILS by exactly the
divergence shape that names
the missing fixture.
The cap-record divergence:
Result.Position: live=(141.3865,7.2243,92.7390)
harness=(141.3599,7.2243,92.7390) (Y slid; X stuck)
Result.CollisionNormal:live=(0,0,-1) ← downward = cottage floor from below
harness=(0,0,+1) ← upward = some other floor
Plus the LiveCompare_FirstCap_DiagnosticDump test (always passes; it's
a probe-firing scratch test) prints every cell polygon in world frame:
Cellar 0xA9B40147 — ceiling polys at world Z=93.80 cover X=133-142,
Y=-1.0-11.5 but NOT the sphere XY of (141.39, 7.03) — at the right
edge of Y=7.03 the ceiling quads are at Y<3.90 or Y>8.70.
Cottage 0xA9B40143 — floor polys at world Z=94.0 cover X=136.7-140.5,
Y=3.9-13.1 but NOT (141.39, 7.03) either — at X=141.39 we are 0.89m
east of the floor quad's rightmost vertex.
Cottage 0xA9B40146 — only 4 walls, no floor.
So both cells we have CAN'T produce the live's cn=(0,0,-1). The actual
blocking polygon must be in a cell or static object we haven't loaded
into the harness yet. The cellar is rectangularly bounded; the cottage
above has a floor that spans the cottage, but the floor polygon RIGHT
ABOVE the ramp top (which is where the freeze fires) is in some OTHER
cell — either a separate cottage-floor sub-cell or a building static
GfxObj.
This is the first evidence-driven step in the saga. Six sessions of
speculation produced ten failed fix shapes; the apparatus produced
this finding in one round trip. Next step: re-capture with
ACDREAM_PROBE_POLY_DUMP + ACDREAM_DUMP_CELLS covering 0xA9B40140-
0xA9B4014F to identify the missing fixture cell.
Adds:
- LiveCompare_Tick0_Spawn / Tick376_OnRamp / FirstCap_HeadHitsCottageFloor
- LiveCompare_FirstCap_DiagnosticDump (always passes; dumps cell polys
in world frame + enables every relevant probe so the captured stdout
shows the harness BSP query path)
- tests/AcDream.Core.Tests/Fixtures/issue98/live-capture.jsonl
(3 representative records from the 41,228-record live capture)
- AssertCallMatchesCapture helper: per-field diff with Vector3 / float
tolerances, reports every divergence not just the first.
Test baseline maintained at 1172 + 8 baseline + 5 new tests pass +
1 known-failing test that pinpoints the bug = 1178 + 9 (where the
new failure is the desired evidence-driven test).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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