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feat(phys): A6.P3 #98 — GfxObj dump infrastructure (ACDREAM_DUMP_GFXOBJS)

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Mirror the existing ACDREAM_DUMP_CELLS pattern for GfxObj-owned geometry:
when ACDREAM_DUMP_GFXOBJS lists a hex GfxObj id, the first
PhysicsDataCache.CacheGfxObj for that id writes the full resolved
polygon table to a JSON fixture under
tests/AcDream.Core.Tests/Fixtures/issue98/0x{id:X8}.gfxobj.json (override
dir via ACDREAM_DUMP_GFXOBJS_DIR).

Motivation: the existing [resolve-bldg] probe captures GfxObj-level
metadata (id, BSP root radius, entity origin) but emits
"hitPoly: n/a (BSP path — side-channel not written)" because the
BSPQuery wire site that would populate LastBspHitPoly never landed.
A polygon-level dump at cache time bypasses that gap — one capture run
yields the FULL polygon table, fixture-loadable by the harness's
RegisterCottageGfxObj helper (next commit).

See docs/research/2026-05-23-a6-p3-issue98-comparison-harness-findings.md
for the cottage GfxObj 0x01000A2B context: landblock-baked static at
entity origin (130.5, 11.5, 94.0), responsible for the head-sphere cap
from below at world Z=94.0 that issue #98 is documenting.

Test baseline: 1183 + 8 pre-existing failures (serial run; +5 new tests
all pass; was 1178 + 8 pre-session).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-23 20:24:26 +02:00
parent 4d83ba5620
commit cc3afbcbeb
5 changed files with 484 additions and 1 deletions
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23
src/AcDream.Core/Physics/PhysicsDataCache.cs
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@ -46,7 +46,7 @@ public sealed class PhysicsDataCache
if (gfxObj.PhysicsBSP?.Root is null) return;
if (gfxObj.VertexArray is null) return;
_gfxObj[gfxObjId] = new GfxObjPhysics
var physics = new GfxObjPhysics
{
BSP = gfxObj.PhysicsBSP,
PhysicsPolygons = gfxObj.PhysicsPolygons,
@ -54,6 +54,27 @@ public sealed class PhysicsDataCache
Vertices = gfxObj.VertexArray,
Resolved = ResolvePolygons(gfxObj.PhysicsPolygons, gfxObj.VertexArray),
};
_gfxObj[gfxObjId] = physics;
if (PhysicsDiagnostics.ProbeDumpGfxObjsEnabled
&& PhysicsDiagnostics.ProbeDumpGfxObjIds.Contains(gfxObjId))
{
try
{
var dump = GfxObjDumpSerializer.Capture(gfxObjId, physics);
var path = System.IO.Path.Combine(
PhysicsDiagnostics.ProbeDumpGfxObjsPath,
System.FormattableString.Invariant($"0x{gfxObjId:X8}.gfxobj.json"));
GfxObjDumpSerializer.Write(dump, path);
Console.WriteLine(System.FormattableString.Invariant(
$"[gfxobj-dump] wrote 0x{gfxObjId:X8} polys={dump.ResolvedPolygons.Count} → {path}"));
}
catch (Exception ex)
{
Console.WriteLine(System.FormattableString.Invariant(
$"[gfxobj-dump] FAILED to dump 0x{gfxObjId:X8}: {ex.GetType().Name}: {ex.Message}"));
}
}
}
/// <summary>