Zone.Update no longer threads a per-belt Task.Run over a double-buffered
Transforms/OrbitPosition pair. AsteroidBelt.Pose/Size are the one place a
chunk pose is computed, a pure function of zone time; Zone.ChunkPose and
Zone.EvaluateBelt read them at the zone's own time. MiningTool,
ResourceScanner and ZoneRenderer (belt matrices and AsteroidBeltUI) all read
through Zone instead of the deleted per-tick buffers; the renderer owns its
own float4[] buffer, filled fresh every frame.
Deleted: System.Threading/.Tasks usings, BeltUpdates, the wait loop, the
per-belt copy+Task.Run, NearestAsteroid (dead/broken reader), the private
UpdateAsteroidTransforms, and AsteroidBelt's four pose fields plus their
allocations. ~65 lines, matching the cut map's estimate.
miningprobe, densest zone of the operator's save (EAC-2265, 809 asteroids,
8 belts), rebuilt against this cut and rerun 10x each side:
before (branch point, 8bd25f6f/e729e6d6):
Zone.Update wall 541-3654 us/tick, CPU 120-391 us/tick (7 clean runs)
3/10 runs crashed: InvalidOperationException from Zone.GetOrbitPosition,
the documented _updatedOrbits/Orbits data race between the main thread's
Clear() and a belt Task.Run
after (this commit):
Zone.Update wall 95-185 us/tick, CPU 99-152 us/tick, in line with the
31-39 us "no belt work" baseline the map recorded -- belts are free per
tick
0/10 races
ChunkPose has no buffer to go stale: ~0.12 u of parent+asteroid motion is
visible across one 17 ms tick instead of being one tick behind
tests/Aetheria.Shared.Tests/MiningCut1Tests.cs (new, 260/260 suite green):
ChunkPoseIsTheOrbitAtZoneTime, ChunkPoseDoesNotDependOnUpdateCadence,
DamagedChunkShrinksAndABrokenOneHasNoSize -- each expected value is the
closed-form orbit/size rule reimplemented in the test, never a call to
AsteroidBelt.Pose/Size.
Negative grep (Zone.cs, "Zone Display", ServerShared/Behaviors) for
Task\.Run|System\.Threading|NewTransforms|\.Transforms\b|BeltUpdates|
NearestAsteroid|\.OrbitPosition\b|NewOrbitPosition: one hit, the commented
line in MineAsteroid that Cut 2 deletes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
22a54ccbaf