User confirmed via A/B test (ACDREAM_DISABLE_TIER1_CACHE=1) that the
visual bug — buildings rendering up in the air outside Holtburg — is in
the cache wiring, not elsewhere. The matrix math (restPose * entityWorld
== model) was provably correct, so the bug had to be cache key collision.
Stabs were namespaced in commit 71d0edc, but scenery (0x80LLBB00 +
localIndex) and interior (0x40LLBB00 + localCounter) still have the
same 256-overflow risk. Dense LBs outside Holtburg (forest, urban) push
localIndex past 255, wrapping into the lbY byte and creating cross-LB
collisions.
Fix: change the cache key from uint entityId to (uint, uint) tuple of
(EntityId, LandblockHint). The cache is now correct-by-construction
regardless of any hydration path's Id-generation strategy. Defensive
against future regressions in any ID namespace.
InvalidateEntity becomes a sweep (was O(1)), but it's called rarely
(only on live-entity despawn). InvalidateLandblock was already a sweep.
Updated 14 existing cache tests + 1 dispatcher integration test to thread
landblockHint through TryGet / DebugCrossCheck calls.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Task 10 (commit 0cbef3c) called ApplyCacheHit inside the per-(entity, partIdx)
foreach loop, but cachedEntry.Batches is flat across all MeshRefs of the
entity. For a 3-MeshRef static building on frame 2: 3 tuples times 6 cached
batches per call = 18 instances drawn instead of 6. Severe Z-fighting and
3x perf hit on every multi-part static entity (buildings, statues, multi-
MeshRef NPCs).
This is the symmetric mirror of the Task 9 bug fixed at 00fa8ae. Both
spec section 5.2 and the plan describe the foreach as per-entity, but
_walkScratch has been per-tuple since Task 6. The implementation
faithfully ported the buggy spec.
Fix: track lastHitEntityId; the cache-hit fast path fires only on the
first tuple of each entity, and subsequent tuples skip the iteration
body via continue. Adds a regression test pinning the per-entity
amplification invariant.
Caught by code review (subagent-driven-development) before Phase 3
dispatched. The bug was invisible in the no-multi-frame-test 1702/8
baseline; would have manifested as visible Z-fighting on every multi-
part building on second-and-subsequent frames once Task 13 perf gate
captured live runs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
WbDrawDispatcher.Draw now branches on cache hit before running classification:
on hit, walks the cached flat batch list and appends RestPose times entityWorld
to the matching groups; on miss, runs today's classification and populates
the cache (Task 9). Animated entities skip the cache entirely.
Adds dispatcher integration tests #11 (static entity populates + reuses)
and #12 (animated bypasses) per spec test plan section 7.2, plus the
multi-MeshRef regression test that would have caught the bug fixed in
commit 00fa8ae (cache populate must flush at entity boundary, not per-tuple).
Phase 2 (dispatcher integration) complete. End-to-end caching now live.
Invalidation hooks (Phase 3) ensure correctness across despawns + LB demotes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Per Phase A.5 spec §4.6 Change #1: when an LB is invisible AND
animatedEntityIds is non-empty, the inner loop walked every entity
in the LB just to find the few animated ones. At ~10.7K entities
(N1=4) that is wasted iteration cost per frame.
Extracted a pure-CPU internal static WalkEntities helper. When LB
is invisible: iterate animatedEntityIds directly and look each up
in a per-LB AnimatedById dictionary (typically <50 animated vs
~10K total). When LB is visible: walk all entities as before.
GpuWorldState.LandblockEntries now yields an AnimatedById map as a
5th tuple field alongside the AABB tuple. Dictionary is built on
each yield (cheap — ~132 entities/LB max). A caching layer is out
of A.5 scope.
WbDrawDispatcher.Draw signature updated to consume the 5-tuple.
GameWindow.cs call site passes _worldState.LandblockEntries which
now yields the 5-tuple — no change needed there.
8 new tests in WbDrawDispatcherBucketingTests cover T17 Change #1
(invisible LB / animated set / neverCull / null frustum) and
T18 Change #2 guard tests (cached AABB / dirty flag / animated bypass).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
