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feat(physics): S2 chunk 4 - movement publishes from the transition's cells; children inherit at registration

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Movement: CommitSetPosition's RefreshPositionRows/ReplacePositionRows and
the staged apply publish the retail render product from the exact cell
list collision just used, the transition's cell_array retail feeds
add_shadows_to_cells in CPhysicsObj::SetPositionInternal @0x00515330
(pseudo-C 283526-283539); the separate move-path bbox recompute is deleted.
calc_cross_cells @0x00515230 stays the distinct full-recompute path
(PhysicsShadowCommitAction.Recalculate).

Children (Contract B recursion): ShadowObjectRegistry.AttachChild/DetachChild
give an attached object the root's current cells as part entries only,
republished whenever the root's array changes, detached at withdrawal and
cascaded from the root's Deregister; nested attachment resolves to the root
with a bounded, cycle-safe chain. EquippedChildRenderController attaches at
realization (FromSetupRenderParts over the child's Setup) and detaches at
its single removal funnel. WalkProductionWorldData's dynamic sweep reads
TryGetRetailCellArray directly; the 64-hop parent-chain walk and its
FindParentLocalId plumbing are deleted. CollisionWorldState.Clear now
also clears the retail products.

Gates (implementer's isolated worktree at identical content): Release
build 0/0; Core 4,970/4,970; App hermetic 6,761/6,761; targeted
walk/child/live-entity/placement/comparator 166/166; Runtime 1,884/1,884.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Erik 2026-09-02 23:37:34 +02:00
parent 706fc49397
commit 75ea269d35
14 changed files with 1072 additions and 179 deletions
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11
src/AcDream.Core/Physics/CollisionWorldState.cs
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@ -127,6 +127,17 @@ internal sealed class CollisionWorldState
ShadowEntityRetailCellArrayRoutes { get; } = new();
internal Dictionary<uint, List<RetailPartEntry>> RetailPartEntriesByCell { get; } = new();
// ── Campaign OVERHAUL S2 chunk 4 ────────────────────────────────────────
// Retail's add_shadows_to_cells (0x00514ae0) child-inheritance recursion
// (oh1-construction-landscape-contract.md Contract B): an attached
// projection (equipped weapon/shield/ammunition) owns no independent
// collision shapes and inherits its root's retail CELLARRAY instead of
// flooding its own. See ShadowObjectRegistry.AttachChild/DetachChild.
internal Dictionary<uint, uint> ShadowChildParent { get; } = new();
internal Dictionary<uint, List<uint>> ShadowParentChildren { get; } = new();
internal Dictionary<uint, IReadOnlyList<ShadowShape>>
ShadowChildPartArrays { get; } = new();
// ── O1 per-prefix installed-key ledgers ────────────────────────────────
// Every mutation of the five landblock-scoped world maps goes through the
// typed helpers below so these ledgers stay exact. The seal's landblock-