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fix(physics): restore retail cell availability semantics

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This commit is contained in:
Erik 2026-07-31 14:22:45 +02:00
parent d3c0d9ec0e
commit 7716c2ee89
14 changed files with 393 additions and 62 deletions
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4
src/AcDream.Core/World/Cells/CellGraph.cs
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@ -8,8 +8,8 @@ namespace AcDream.Core.World.Cells;
/// <summary>
/// The unified cell graph: the active, authoritative id-&gt;cell resolver and registry.
/// Populated unconditionally from
/// <see cref="AcDream.Core.Physics.PhysicsDataCache.CacheCellStruct"/> (before its
/// idempotency + null-BSP guards, so BSP-less cells are included) and consumed across
/// <see cref="AcDream.Core.Physics.PhysicsDataCache.CacheCellStruct"/> (including
/// authored cells with null physics or containment roots) and consumed across
/// the engine: <see cref="GetVisible"/> resolves any cell id, <see cref="CurrCell"/> is
/// the player render/lighting root, <see cref="FindVisibleChildCell"/> resolves the
/// 3rd-person camera cell, and <see cref="TryGetTerrainOrigin"/> supplies the block-local

8
src/AcDream.Core/World/Cells/EnvCell.cs
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@ -10,7 +10,11 @@ namespace AcDream.Core.World.Cells;
/// <summary>Indoor room cell. Retail anchor: CEnvCell (acclient.h:32072).</summary>
public sealed class EnvCell : ObjCell
{
/// <summary>Cell-containment BSP (retail CellStruct.CellBSP). Null =&gt; AABB fallback.</summary>
/// <summary>
/// Cell-containment BSP (retail CellStruct.CellBSP). A present tree with a
/// null root is universally inside; an absent test/tooling payload uses the
/// legacy AABB fallback.
/// </summary>
public CellBSPTree? ContainmentBsp { get; }
/// <summary>
@ -37,7 +41,7 @@ public sealed class EnvCell : ObjCell
var local = Vector3.Transform(worldPoint, InverseWorldTransform);
if (FlatContainmentBsp is not null)
return FlatBspQuery.PointInsideCellBsp(FlatContainmentBsp, local);
if (ContainmentBsp?.Root is not null)
if (ContainmentBsp is not null)
return BSPQuery.PointInsideCellBsp(ContainmentBsp.Root, local); // BSPQuery.cs:1034
return local.X >= LocalBoundsMin.X && local.X <= LocalBoundsMax.X
&& local.Y >= LocalBoundsMin.Y && local.Y <= LocalBoundsMax.Y