Stub adapter that validates constructor args and exposes the public
shape (IncrementRefCount / DecrementRefCount / GetRenderData / Dispose).
Real ObjectMeshManager init is deferred to Task 9 — for now methods
no-op so call sites can wire the adapter without behavioral effect.
IWbMeshAdapter interface enables mocking in subsequent tasks
(LandblockSpawnAdapter tests in Task 11 need it).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Mesh extraction (4 tests): quad output, double-sided via Stippling.Both,
double-sided via SidesType=Clockwise (AC's NoNeg-clear convention),
NoPos-only emission. Pins GfxObjMesh.Build's behavior.
Setup flatten (5 tests): identity (no frames), Default frame, Resting
beats Default, motion override beats Resting, DefaultScale per part.
Pins SetupMesh.Flatten's placement-frame fallback chain.
These run BEFORE substitution per N.1/N.3 pattern — they prove
equivalence, not test the substitution.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Holds Translucency / Luminosity / Diffuse / SurfOpacity / NeedsUvRepeat /
DisableFog keyed by (gfxObjId, surfaceIdx). Populated at extraction time,
queried by the draw dispatcher. ConcurrentDictionary because mesh
extraction happens on background workers.
No fork patches required — keeps WB's MeshBatchData pristine.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Per-landblock frustum culling for the streaming renderer. Extracts
6 normalized view-frustum planes from a View×Projection matrix using
the standard Gribb-Hartmann method. IsAabbVisible tests the AABB's
most-positive vertex against each plane — conservative (no false
negatives) and zero-allocation.
Key implementation note: System.Numerics.Matrix4x4 uses ROW-VECTOR
convention (clip = worldPos * VP), so Gribb-Hartmann must operate on
the COLUMNS of the matrix (not rows). The spec's row-based pseudocode
assumed column-major (OpenGL) convention; the fix is col4 ± col{1..3}.
7 new tests covering ortho, perspective (front/behind/left/far/
near-straddling), and acdream's actual Z-up camera convention.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
