DBot/overdrive_that_matters
DBot/overdrive_that_matters
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Use more robust 64-bit LCG for seeding CMWC internal state

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This commit is contained in:
DBotThePony 2025-03-05 01:03:00 +07:00
parent 4eb7971717
commit 9417d6ffdc
Signed by: DBot
GPG Key ID: DCC23B5715498507
1 changed files with 5 additions and 5 deletions
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src/main/kotlin/ru/dbotthepony/mc/otm/core/util/CMWCRandom.kt
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@ -24,12 +24,12 @@ class CMWCRandom(seed: Long = System.nanoTime()) : RandomGenerator, RandomSource
this.seed = seed
carry = Integer.remainderUnsigned(seed.toInt(), CMWC_CARRY_MAX)
// init state with regular LCG produced values
state[0] = seed.toInt()
state[1] = seed.shr(32).toInt()
var lcg = seed
for (i in 2 until state.size) {
state[i] = 69069 * state[i - 2] + 362437
// init state with regular LCG produced values
for (i in 1 until state.size) {
lcg = lcg * 6364136223846793005 + 1442695040888963407
state[i] = lcg.ushr(32).toInt()
}
stateIndex = state.size - 1