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feat(A.5 T4): StreamingRegion ComputeFirstTickDiff

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Adds the first-tick bootstrap diff: ToLoadNear for the (2*near+1)^2 inner
window, ToLoadFar for the outer annulus up to FarRadius. Uses Chebyshev
distance, matching existing Recenter convention.

Also renames the single-tier RecenterTo → RecenterToSingleTier to free
the canonical name for the upcoming two-tier overload (T5). Updates
StreamingRegionTests and StreamingController to call the renamed method.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-09 22:34:55 +02:00
parent 378f32ac7a
commit 7bcababf82
4 changed files with 54 additions and 6 deletions
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14
tests/AcDream.Core.Tests/Streaming/StreamingRegionTwoTierTests.cs
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@ -20,4 +20,18 @@ public class StreamingRegionTwoTierTests
// becomes (NearRadius+2) for the far-tier unload, which is wrong.
Assert.Equal(region.FarRadius, region.Radius);
}
[Fact]
public void RecenterTo_FirstTick_SplitsLoadIntoNearAndFar()
{
// near=1, far=3 → near window is 3×3=9, far window is 7×7-3×3=40 LBs.
var region = new StreamingRegion(centerX: 100, centerY: 100, nearRadius: 1, farRadius: 3);
var diff = region.ComputeFirstTickDiff();
Assert.Equal(9, diff.ToLoadNear.Count);
Assert.Equal(40, diff.ToLoadFar.Count);
Assert.Empty(diff.ToPromote);
Assert.Empty(diff.ToDemote);
Assert.Empty(diff.ToUnload);
}
}