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diag(render): #105 round 2 — tripwires on the upload/registration loss paths

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Live session evidence narrowed #105 decisively: a wall section rendered as the
sky/clear color from session start, HAD collision (cell + physics fully
loaded), zero round-1 tripwires fired (all dat reads succeeded), and the hole
showed terrain or clear color depending on camera angle. So the wall mesh was
built and then lost between mesh-build and draw. New tripwires cover the
loss candidates in that window (all print ONLY on anomaly):

- [geom-null]     ProcessQueueAsync EnvCell branch resolved null, with the
                  failing sub-step (prepare-null / cellstruct-missing /
                  env-read-failed) — a null here means the DEDUPLICATED cell
                  geometry never renders for ANY cell that shares it, and
                  nothing retries (RegisterCell fire-and-forgets the task).
- [geom-misroute] an EnvCell geom id (bit 33) whose pending request vanished
                  fell through to the generic path, where its hash-derived
                  low bits resolve to nothing -> silent null.
- [up-null]       UploadGfxObjMeshData returned null and the EMPTY substitute
                  was cached in _renderData forever (permanently invisible).

Pair with the existing one-shot draw-side audit (ACDREAM_A8_AUDIT=1, light:
one line per unique cell/geom pair, prints renderData=null + bindless-handle
status) for full attribution on the next occurrence.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Erik 2026-06-09 21:52:01 +02:00
parent 8dc707d43b
commit cbba71f8a9
1 changed files with 18 additions and 0 deletions
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18
src/AcDream.App/Rendering/Wb/ObjectMeshManager.cs
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@ -500,10 +500,25 @@ namespace AcDream.App.Rendering.Wb {
if (_dats.Portal.TryGet<DatReaderWriter.DBObjs.Environment>(envId, out var environment)) {
if (environment.Cells.TryGetValue(req.CellStructure, out var cellStruct)) {
data = PrepareCellStructMeshData(id, cellStruct, req.Surfaces, Matrix4x4.Identity, CancellationToken.None);
// TEMP diagnostic #105 (strip with fix): a null prep here means
// this deduplicated cell geometry will NEVER render anywhere.
if (data == null)
Console.WriteLine($"[geom-null] prepare-null geom=0x{id:X10} env=0x{envId:X8} cs=0x{req.CellStructure:X4}");
}
else {
Console.WriteLine($"[geom-null] cellstruct-missing geom=0x{id:X10} env=0x{envId:X8} cs=0x{req.CellStructure:X4}");
}
}
else {
Console.WriteLine($"[geom-null] env-read-failed geom=0x{id:X10} env=0x{envId:X8}");
}
}
else {
// TEMP diagnostic #105 (strip with fix): an EnvCell geom id (bit 33)
// whose pending request vanished gets misrouted to the generic path,
// where its hash-derived low bits resolve to nothing -> silent null.
if ((id & 0x2_0000_0000UL) != 0)
Console.WriteLine($"[geom-misroute] envcell geom 0x{id:X10} had no pending request — generic path will null it");
// If it's a direct setup or gfxobj, make sure background loads don't abort half-way
data = PrepareMeshData(id, isSetup, CancellationToken.None);
}
@ -683,6 +698,9 @@ namespace AcDream.App.Rendering.Wb {
var renderData = UploadGfxObjMeshData(meshData);
if (renderData == null) {
// TEMP diagnostic #105 (strip with fix): the empty substitute is cached in
// _renderData forever -> the object exists but never draws (invisible walls).
Console.WriteLine($"[up-null] upload returned null for 0x{meshData.ObjectId:X10} — caching EMPTY render data (permanently invisible)");
renderData = new ObjectRenderData();
}