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Restore deposit clump RNG

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- Return deposit clumps to the standard RNG; the unsynchronized generator measured no gain
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Brian Neumann-Fopiano committed 2026-10-21 19:48:15 -04:00
1 parent 13730f207a
commit e39e59699e
2 files changed
+1 -49
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core/src/test/java/art/arcane/iris/generation/stage/IrisDepositModifierProbabilityTest.java
-24
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@@ -19,30 +19,6 @@ public class IrisDepositModifierProbabilityTest {
assertEquals(0.04D, accepted / (double) samples, 0.003D);
}
@Test
public void clumpRandomMatchesRngDrawForDraw() {
RNG seeds = new RNG(-90181L);
for (int trial = 0; trial < 2_000; trial++) {
long seed = trial < 4 ? new long[]{0L, -1L, Long.MIN_VALUE, Long.MAX_VALUE}[trial] : seeds.nextLong();
RNG expected = new RNG(seed);
RNG actual = new IrisDepositModifier.ClumpRandom(seed);
for (int draw = 0; draw < 48; draw++) {
String label = "seed " + seed + " draw " + draw;
switch (draw % 8) {
case 0 -> assertEquals(label, Float.floatToIntBits(expected.nextFloat()), Float.floatToIntBits(actual.nextFloat()));
case 1 -> assertEquals(label, expected.nextInt(3), actual.nextInt(3));
case 2 -> assertEquals(label, Double.doubleToLongBits(expected.nextDouble()), Double.doubleToLongBits(actual.nextDouble()));
case 3 -> assertEquals(label, Double.doubleToLongBits(expected.d()), Double.doubleToLongBits(actual.d()));
case 4 -> assertEquals(label, expected.i(-5, 17), actual.i(-5, 17));
case 5 -> assertEquals(label, expected.nextInt(1_000_000_007), actual.nextInt(1_000_000_007));
case 6 -> assertEquals(label, expected.nextLong(), actual.nextLong());
default -> assertEquals(label, expected.nextBoolean(), actual.nextBoolean());
}
}
assertEquals(expected.getSeed(), actual.getSeed());
}
}
@Test
public void neighboringClumpChancesRemainIndependentAcrossBatchBoundaries() {
int samples = 100_000;