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Remember neighbourhood answers

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- Each thread keeps its recent final hasColumnsAround answers next to its chunk slots, so the object and hydrology gates skip the nine-chunk scan on repeat
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Brian Neumann-Fopiano committed 2026-09-28 12:05:05 -04:00
1 parent 82f52cd6ec
commit 1614d6a9a7
2 files changed
+46 -1
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core/src/test/java/art/arcane/iris/generation/hydrology/HydrologyTileCacheTest.java
+23
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@@ -2577,4 +2577,27 @@ public class HydrologyTileCacheTest {
}
}
@Test
public void neighbourhoodAnswersFollowPublishedColumnsAndResetWithTheEpoch() {
HydrologyPlanner planner = mock(HydrologyPlanner.class);
HydrologyTile publishing = mock(HydrologyTile.class);
HydrologyTile empty = mock(HydrologyTile.class);
HydrologyPlannerSettings settings = stalePrefetchSettings();
when(planner.settings()).thenReturn(settings);
AtomicReference<HydrologyTile> current = new AtomicReference<>(publishing);
when(planner.plan(any(HydrologyTileKey.class))).thenAnswer(invocation -> current.get());
publishesInto(publishing, RiverFootprint.pack(0, 0));
when(publishing.columnAt(0, 0)).thenReturn(Optional.of(
new HydrologyColumnSample(0, 0, 90, 63, false, "parent", List.of())));
HydrologyTileCache cache = new HydrologyTileCache(planner, 64);
assertTrue(cache.hasColumnsAround(1, 1));
assertTrue(cache.hasColumnsAround(-1, 0));
assertFalse(cache.hasColumnsAround(2, 0));
assertTrue(cache.hasColumnsAround(1, 1));
current.set(empty);
cache.clear();
assertFalse(cache.hasColumnsAround(1, 1));
assertFalse(cache.hasColumnsAround(0, 0));
}
}