Hykilpikonna
105 lines
3.7 KiB
Java
105 lines
3.7 KiB
Java
package kaptainwutax.seedcracker.cracker.population;
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import kaptainwutax.seedcracker.cracker.DecoratorCache;
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import kaptainwutax.seedcracker.util.Rand;
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import net.minecraft.util.math.BlockPos;
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import net.minecraft.util.math.ChunkPos;
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import net.minecraft.world.biome.Biome;
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import net.minecraft.world.gen.ChunkRandom;
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import net.minecraft.world.gen.GenerationStep;
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import net.minecraft.world.gen.decorator.ConfiguredDecorator;
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import net.minecraft.world.gen.decorator.Decorator;
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import net.minecraft.world.gen.feature.ConfiguredFeature;
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import net.minecraft.world.gen.feature.DecoratedFeatureConfig;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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public abstract class PopulationData {
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private final ChunkPos chunkPos;
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private final Decorator<?> decorator;
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private final Biome biome;
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public PopulationData(ChunkPos chunkPos, Decorator<?> decorator, Biome biome) {
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this.chunkPos = chunkPos;
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this.decorator = decorator;
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this.biome = biome;
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}
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public final boolean test(long structureSeed) {
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long decoratorSeed = this.getPopulationSeed(structureSeed, this.chunkPos.x << 4, this.chunkPos.z << 4);
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int salt = DecoratorCache.get().getSalt(this.biome, this.decorator, true);
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if(salt == DecoratorCache.INVALID) {
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return false;
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}
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decoratorSeed += salt;
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decoratorSeed ^= Rand.JAVA_LCG.multiplier;
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decoratorSeed &= Rand.JAVA_LCG.modulo - 1;
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return this.testDecorator(decoratorSeed);
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}
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public long getPopulationSeed(long structureSeed, int x, int z) {
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Rand rand = new Rand(structureSeed, true);
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long a = rand.nextLong() | 1L;
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long b = rand.nextLong() | 1L;
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return (long)x * a + (long)z * b ^ structureSeed;
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}
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public abstract boolean testDecorator(long decoratorSeed);
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@Override
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public boolean equals(Object obj) {
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if(obj == this)return true;
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if(obj instanceof PopulationData) {
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PopulationData populationData = ((PopulationData)obj);
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return populationData.chunkPos.equals(this.chunkPos) && populationData.decorator == this.decorator;
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}
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return false;
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}
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public abstract static class Feature {
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private Map<Biome, Long> CACHE = new HashMap<>();
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private GenerationStep.Feature genStep;
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private Decorator decorator;
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public Feature(GenerationStep.Feature genStep, Decorator decorator) {
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this.genStep = genStep;
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this.decorator = decorator;
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}
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public ChunkRandom buildRand(long worldSeed, Biome biome, ChunkPos chunkPos) {
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if(CACHE.containsKey(biome)) {
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return new ChunkRandom(CACHE.get(biome));
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}
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List<ConfiguredFeature<?>> features = biome.getFeaturesForStep(this.genStep);
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for(int i = 0; i < features.size(); i++) {
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ConfiguredFeature<?> feature = features.get(i);
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if(!(feature.config instanceof DecoratedFeatureConfig))continue;
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ConfiguredDecorator<?> currentDecorator = ((DecoratedFeatureConfig)feature.config).decorator;
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if(currentDecorator.decorator == this.decorator) {
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BlockPos pos = new BlockPos(chunkPos.getStartX(), 0, chunkPos.getStartZ());
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ChunkRandom chunkRandom = new ChunkRandom();
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long populationSeed = chunkRandom.setSeed(worldSeed, pos.getX(), pos.getZ());
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long seed = chunkRandom.setFeatureSeed(populationSeed, i, this.genStep.ordinal());
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CACHE.put(biome, seed ^ Rand.JAVA_LCG.multiplier);
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return chunkRandom;
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}
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}
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return null;
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}
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}
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}
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