DBot/overdrive_that_matters
DBot/overdrive_that_matters
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Use PCG as random source in Enormous Placement

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DBotThePony 2025-03-08 17:40:35 +07:00
parent 3ea9a7f386
commit d06c32aec2
Signed by: DBot
GPG Key ID: DCC23B5715498507
1 changed files with 17 additions and 6 deletions
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23
src/main/kotlin/ru/dbotthepony/mc/otm/worldgen/placement/AbstractEnormousPlacement.kt
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@ -3,10 +3,9 @@ package ru.dbotthepony.mc.otm.worldgen.placement
import com.github.benmanes.caffeine.cache.Caffeine
import com.github.benmanes.caffeine.cache.Scheduler
import com.mojang.serialization.Codec
import com.mojang.serialization.DataResult
import com.mojang.serialization.MapCodec
import com.mojang.serialization.codecs.RecordCodecBuilder
import it.unimi.dsi.fastutil.HashCommon
import it.unimi.dsi.fastutil.io.FastByteArrayOutputStream
import net.minecraft.Util
import net.minecraft.core.BlockPos
import net.minecraft.core.SectionPos
@ -14,10 +13,11 @@ import net.minecraft.util.RandomSource
import net.minecraft.world.level.ChunkPos
import net.minecraft.world.level.levelgen.placement.PlacementContext
import net.minecraft.world.level.levelgen.placement.PlacementModifier
import ru.dbotthepony.mc.otm.core.util.CMWCRandom
import ru.dbotthepony.mc.otm.core.util.Xoshiro256SSRandom
import ru.dbotthepony.mc.otm.data.codec.inRange
import ru.dbotthepony.kommons.util.XXHash64
import ru.dbotthepony.mc.otm.core.util.PCG32RandomSource
import ru.dbotthepony.mc.otm.data.codec.minRange
import ru.dbotthepony.mc.otm.worldgen.placement.AbstractEnormousPlacement.Parameters
import java.io.DataOutputStream
import java.time.Duration
import java.util.stream.Stream
import kotlin.math.sqrt
@ -73,7 +73,18 @@ abstract class AbstractEnormousPlacement(val parameters: Parameters) : Placement
.build<ChunkPos, GeneratedChunk>()
private fun computeChunk(context: PlacementContext, pos: ChunkPos): GeneratedChunk {
val random = Xoshiro256SSRandom(context.level.seed, parameters.seedMix, pos.x.toLong(), pos.z.toLong())
val bytes = FastByteArrayOutputStream()
val dataStream = DataOutputStream(bytes)
dataStream.writeLong(context.level.seed)
dataStream.writeLong(parameters.seedMix)
dataStream.writeInt(pos.x)
dataStream.writeInt(pos.z)
val hash = XXHash64()
hash.update(bytes.array, 0, bytes.length)
val random = PCG32RandomSource(hash.digestAsLong())
var stream = Stream.of(BlockPos(pos.minBlockX, 0, pos.minBlockZ))
parameters.placementModifiers.forEach { modifier -> stream = stream.flatMap { modifier.getPositions(context, random, it).sequential() } }
return GeneratedChunk(stream.flatMap { getPositions(it, random) })