The register row predicted "catching or stopping on a doorway sill". That
symptom could not have been occurring. `Transition.BspOnlyDispatch`
(TransitionTypes.cs:1348, landed 2026-05-25 as A6.P7) already skipped both
primitive branches (:3911, :3954) whenever the target's wire PhysicsState
carries HAS_PHYSICS_BSP_PS, and ACE sets that bit from CSetup.HasPhysicsBSP
for every affected Setup. The extra primitive was never tested for collision.
The live defect was CELL MEMBERSHIP. The same shape list feeds
`ShadowObjectRegistry.BuildFloodSpheres`, which had no such guard and
preferred Cylinders over everything whenever any Cylinder existed — retail's
SECOND priority applied ahead of its first. For the 73 CylSphere+BSP Setups
acdream therefore flooded shadow cells from the cylinder and never from the
slab: an object absent from cells it physically occupies, which is the
#98 / #168 symptom class, not the door-collision class the row named.
Retail, re-disassembled from the PDB-paired binary (v11.4186, CodeView GUID
9e847e2f-777c-4bd9-886c-22256bb87f32, check_exe_pdb.py MATCH) rather than
taken from Binary Ninja, which drops flag tests:
CPhysicsObj::FindObjCollisions @0x0050f050
0x0050f165 test dword [esi+0xa8], 0x10000
0x0050f16f je 0x50f1a2 ; clear -> primitive dispatch
0x0050f18d call 0x518180 ; CPartArray::FindObjCollisions
0x0050f19d jmp 0x50f2b0 ; UNCONDITIONAL, past BOTH primitive loops
; (CylSphere 0x50f1a2, Sphere 0x50f21d)
0x0050f1d6 jae 0x50f317 ; CylSphere loop exhausted -> RETURN
0x0050f22f je 0x50f31b ; zero Spheres -> RETURN seeded OK_TS
CPhysicsObj::calc_cross_cells @0x00515230
0x00515285 test dword [esi+0xa8], 0x10000
0x0051528f jne 0x515305 -> CPhysicsObj::find_bbox_cell_list @0x00510fc0
0x005152d1 call 0x52b9f0 ; cylsphere branch, below the jump
0x005152fb call 0x52b990 ; sorting-sphere branch, below the jump
Priority at both consumers: BSP -> CylSphere -> Sphere -> nothing. BSP wins.
Every address above was resolved back to its symbol by exact lookup in
named-retail/symbols.json.
Changes:
* `ShadowShapeBuilder.FromSetup` gains a step-0 dispatch gate. Steps 1 and 2
are skipped entirely when any part's EFFECTIVE GfxObj carries a physics
BSP. The gate and step 3 now share one `EffectivePartGfxObjId` helper, so
they cannot read different identities — a gate on `setup.Parts` would,
after an ObjDesc swap, suppress the primitives while step 3 emitted
nothing and `Build` returned null, deleting the entity's collision.
Emission order is unchanged. This also removes acdream's undeclared
reliance on the server sending the flag: the gate is derived from the
parts, exactly as CPartArray::CacheHasPhysicsBSP @0x00518110 derives it.
* `ShadowObjectRegistry.BuildFloodSpheres` now applies calc_cross_cells'
own order: BSP, else Cylinder, else everything. Given the gate above this
is a no-op for every shape list acdream produces (FromSetup is now
exclusive; both landblock-static publishers already emit homogeneous
lists), so the measured membership delta remains attributable to the
gate alone. It is kept for the same reason BspOnlyDispatch is kept: retail
genuinely dispatches here, and it guards a future additive producer.
`Transition.BspOnlyDispatch` is deliberately untouched.
Register: AP-152 RETIRED with its four false statements corrected — the risk
statement (the symptom was already inert); "small and centred at the part
origin" (max primitive is 6.714 m, and 0x0200086E's sphere origin is
(0.759, 0.165, 5.842)); the cottage door's "~14 cm base Sphere" (it is
0.100 m; 0.141 is Setup.Radius, which AP-22 proved is never collision
geometry); and naming one pinning test where two existed. AP-153/154/155
filed: retail's dispatch flag is cached once at InitPartArrayObject+0x7e
where acdream's gate is live; the query-time guard takes a client-derived
flag off the wire; and the static publishers emit Setup Spheres as
height-capped Cylinders while BuildFloodSpheres approximates retail's
bounding box with bounding spheres.
Tests. Both pinning tests corrected, neither deleted:
`FromSetup_DoorSetup_ProducesFourShapes` -> `..._EmitsBspPartsOnly`;
`FromSetup_DoorSetup_SphereAtExpectedLocalOffset` re-hosted on
`_ => false`, the DAT-real configuration for the 3,605 Sphere-only Setups.
`FromSetup_ScaleFactor_MultipliesAllRadiiAndOffsets` was the campaign's
eighth green test covering nothing — its assertions sat inside
`if (CollisionType == Cylinder)` on a fixture with zero CylSpheres, so only
`Scale == 2.0f` ever ran. Proved empirically: with the sphere radius scale
deleted, the old body passes and the corrected body fails. Three new facts:
the effective-identity gate, the App-layer CylSphere+BSP registration (no
App fixture combined the two before), and the flood-set dispatch. One new
installed-DAT sweep pins 172 affected Setups (73 CylSphere+BSP, 99
Sphere+BSP) behind external bucket controls, re-measured independently and
agreeing exactly with the filing commit's separate sweep.
All eight sabotages run and reported; every discriminating fact reddens in
the intended direction and only there. Clean Release build after deleting
every bin/obj: 0 errors. Complete suite 11,203 passed / 4 skipped / 0
failed, +5 on the 11,198 baseline at ec29a732 — exactly the five added
facts, no new skips.
Blast radius, corrected: the FromSetup half is graphical-only (its sole
production caller is LiveEntityCollisionBuilder in AcDream.App, which
AcDream.Headless cannot reference — Headless -> Runtime -> Core/Content).
The BuildFloodSpheres half lives in AcDream.Core and DOES execute in
Headless via LandblockPhysicsContentBuilder, but is behaviour-neutral there
because both of that builder's registrations pass homogeneous lists.
Headless suite green at 89/89.
NOT yet gated live: this changes shadow-cell membership for 22 Setups used
by 151 Door weenies and 38 stationary props. Needs a connected session.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Retail synthesizes NO shape for a shapeless object, so the fix is deletion,
not a corrected height formula.
CPhysicsObj::FindObjCollisions @0x0050f050 dispatches exclusively -- BSP xor
CylSphere xor Sphere xor nothing. The BSP branch leaves via an unconditional
`jmp 0x50f2b0` at 0x0050f19d and cannot reach the primitive branches; a
CylSphere-bearing object that survives its loop returns rather than falling
through to the Sphere loop; and with zero cylspheres, zero spheres and no
physics BSP, `0x0050f22f je 0x50f31b` branches straight to the epilogue,
returning the OK_TS seeded at `0x0050f13b mov edi,1`. CPartArray::GetRadius
(0x005180a0) and GetHeight (0x005180b0) are absent from the function's entire
call set -- Setup.Radius/Height serve attack cones, cylinder_distance and
MoveTo, never collision geometry. Disassembled directly from the PDB-paired
binary (GUID 9e847e2f-777c-4bd9-886c-22256bb87f32) rather than read from the
Binary Ninja text, whose ebp_1 aliasing in this function is visibly corrupt.
THREE copies were deleted, not one. The AP-22 register row cited
LiveEntityCollisionBuilder.cs and ShadowShapeBuilder.cs; the latter never
reads Setup.Radius at all, and the row omitted both
LandblockPhysicsPublisher.PublishStaticEntity and
LandblockPhysicsContentBuilder.PublishStaticCollision -- the second being the
only copy the headless host executes. Fixing just the cited site would have
left headless statics on the invented footprint.
The branch was unreachable dead code, not a live approximation. A sweep of all
5,935 Setups in the installed client_portal.dat -- validated by byte
accounting (5,935/5,935 records consumed with an exact 20 + 48*numLights
residual tail, zero unexplained bytes) and independently reproduced by the
production FlatCollisionAssetBuilder.FlattenSetup path -- finds 0 Setups
satisfying the guard: every Setup with Radius > 0.0001 carries at least one
CylSphere or Sphere, and all 1,294 genuinely shapeless Setups have Radius
exactly 0. Buckets: 678 cylsphere, 3,605 sphere-only, 358 BSP-only, 1,294
shapeless, 4,282 with Radius > 0.0001. Nothing loses collision because nothing
gained it, so no visual gate is required.
Tests, all sabotage-verified in both directions:
- InstalledSetupCollisionReachabilityTests (new, Content) -- the negative
claim plus five EXTERNAL positive controls, so a broken enumeration cannot
satisfy it vacuously. Inverting the claim reddens it; emptying the
enumeration fails on the controls at 0 != 5935 rather than passing.
- ShapelessSetupWithRadius_ProducesNoRegistration (new, App) -- restoring the
deleted block reddens exactly this fact and nothing else.
- Build_PropagatesExactStateFlagsScaleAndFullSeedCell -- re-hosts the state /
PWD-flag / seed-cell coverage that rode on the deleted fallback test, whose
fixture (a Setup with a radius and no primitives) cannot exist in the DAT.
Flipping a FromPwdBitfield bit reddens it; so does swapping SeedCellId for
the landblock id.
Also corrects ShadowShapeBuilder's retail-anchor comment, which claimed each
part's find_obj_collisions tests "CylSpheres + GfxObj BSP".
CPhysicsPart::find_obj_collisions @0x0050d8d0 tests ONLY the GfxObj physics
BSP; CylSpheres are a Setup-level array reached via CPartArray::GetCylsphere.
That comment was the written justification for the additive emission now filed
as AP-152, so it is corrected here even though AP-152 is not fixed here.
AP-22 retired with evidence; AP-152 filed (live path emits primitives AND BSP
parts additively where retail is exclusive -- 172 of 5,935 Setups including
BSP doors; deliberately not folded in, it needs its own visual gate). Issue
#330 filed: the headless host registers no live-entity collision at all, a
pre-existing gap this survey established and nothing tracked.
Gates: Release build 0 errors / 0 warnings. Complete solution suite
11,195 passed / 4 skipped / 0 failed (baseline 11,193/4/0 at bcb66ccd; +1 App
for the added fact, +1 Content for the reachability test; the replaced test is
net zero). No new skips. Headless.Tests 89/89 exercises the site-3 copy.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Erik