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[1.13] WorldChunkManager

Posted August 2, 20187 yr

I'm using spigot for this project, but, as I'm working only with nms, I think that I can ask this question. In the prevoius versions of minecraft we could create a new WorldChunkManager and override the default one of a world with the one just created by using reflection ("c" variable in the WorldProviderClass). As Mojang changes every time the code, in 1.13 the variable c (WorldChunkManager) is found in a class called ChunkGeneratorAbstract that extends ChunkGenerator. From what I know there's only a way to get there: cast ChunkGeneratorAbstract to ChunkGenerator, and this is what I did in my code:


public class Utils {

    private IslandCraftPlugin plugin = JavaPlugin.getPlugin(IslandCraftPlugin.class);

    public void register(World world, final BiomeGenerator biome) throws NoSuchFieldException, IllegalAccessException {

        CraftWorld craftWorld = (CraftWorld) world;

        ChunkGeneratorAbstract generator = (ChunkGeneratorAbstract) craftWorld.getHandle().worldProvider.getChunkGenerator();

        Field field = getField(generator.getClass(), "c");

        field.setAccessible(true);


        field.set(generator, new CustomWorldChunkManager(biome));


    }
    private  Field getField(Class<?> clazz, String fieldName) throws NoSuchFieldException {
        try {
            return clazz.getDeclaredField(fieldName);
        } catch (NoSuchFieldException e) {
            Class<?> superClass = clazz.getSuperclass();
            if (superClass == null) {
                throw e;
            } else {
                return getField(superClass, fieldName);
            }
        }

    }
}

, but when I try :

  craftWorld.getHandle().worldProvider.getChunkGenerator().getWorldChunkManager() instanceof CustomWorldChunkManager

I get a false but when I try to check if the field was correctly set I get true. What am I doing wrong?

PS:

If you need it, here's the ChunkGeneratorAbstract class:

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package net.minecraft.server.v1_13_R1;

import com.google.common.collect.Maps;
import java.util.BitSet;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Locale;
import java.util.Map;
import java.util.Random;
import java.util.function.Function;
import javax.annotation.Nullable;
import net.minecraft.server.v1_13_R1.BlockPosition.MutableBlockPosition;
import net.minecraft.server.v1_13_R1.HeightMap.Type;
import net.minecraft.server.v1_13_R1.WorldGenStage.Decoration;
import net.minecraft.server.v1_13_R1.WorldGenStage.Features;
import org.bukkit.craftbukkit.libs.it.unimi.dsi.fastutil.longs.Long2ObjectMap;
import org.bukkit.craftbukkit.libs.it.unimi.dsi.fastutil.longs.Long2ObjectMaps;
import org.bukkit.craftbukkit.libs.it.unimi.dsi.fastutil.longs.LongSet;

public abstract class ChunkGeneratorAbstract<C extends GeneratorSettings> implements ChunkGenerator<C> {
    protected final GeneratorAccess a;
    protected final long b;
    protected final WorldChunkManager c;
    protected final Map<StructureGenerator<? extends WorldGenFeatureConfiguration>, Long2ObjectMap<StructureStart>> d = Maps.newHashMap();
    protected final Map<StructureGenerator<? extends WorldGenFeatureConfiguration>, Long2ObjectMap<LongSet>> e = Maps.newHashMap();

    public ChunkGeneratorAbstract(GeneratorAccess generatoraccess, WorldChunkManager worldchunkmanager) {
        this.a = generatoraccess;
        this.b = generatoraccess.getSeed();
        this.c = worldchunkmanager;
    }

    public void addFeatures(RegionLimitedWorldAccess regionlimitedworldaccess, Features worldgenstage_features) {
        SeededRandom seededrandom = new SeededRandom(this.b);
        int i = regionlimitedworldaccess.a();
        int j = regionlimitedworldaccess.b();
        BitSet bitset = regionlimitedworldaccess.c(i, j).a(worldgenstage_features);

        for(int k = i - 8; k <= i + 8; ++k) {
            for(int l = j - 8; l <= j + 8; ++l) {
                List list = regionlimitedworldaccess.getChunkProvider().getChunkGenerator().getWorldChunkManager().getBiome(new BlockPosition(k * 16, 0, l * 16), (BiomeBase)null).a(worldgenstage_features);
                ListIterator listiterator = list.listIterator();

                while(listiterator.hasNext()) {
                    int i1 = listiterator.nextIndex();
                    WorldGenCarverWrapper worldgencarverwrapper = (WorldGenCarverWrapper)listiterator.next();
                    seededrandom.c(regionlimitedworldaccess.getMinecraftWorld().getSeed() + (long)i1, k, l);
                    if (worldgencarverwrapper.a(regionlimitedworldaccess, seededrandom, k, l, WorldGenFeatureConfiguration.e)) {
                        worldgencarverwrapper.a(regionlimitedworldaccess, seededrandom, k, l, i, j, bitset, WorldGenFeatureConfiguration.e);
                    }
                }
            }
        }

    }

    @Nullable
    public BlockPosition findNearestMapFeature(World world, String s, BlockPosition blockposition, int i) {
        StructureGenerator structuregenerator = (StructureGenerator)WorldGenerator.aF.get(s.toLowerCase(Locale.ROOT));
        return structuregenerator != null ? structuregenerator.getNearestGeneratedFeature(world, this, blockposition, i) : null;
    }

    protected void a(IChunkAccess ichunkaccess, Random random) {
        MutableBlockPosition blockposition_mutableblockposition = new MutableBlockPosition();
        int i = ichunkaccess.getPos().d();
        int j = ichunkaccess.getPos().e();
        Iterator iterator = BlockPosition.a(i, 0, j, i + 16, 0, j + 16).iterator();

        while(iterator.hasNext()) {
            BlockPosition blockposition = (BlockPosition)iterator.next();

            for(int k = 4; k >= 0; --k) {
                if (k <= random.nextInt(5)) {
                    ichunkaccess.a(blockposition_mutableblockposition.c(blockposition.getX(), k, blockposition.getZ()), Blocks.BEDROCK.getBlockData(), false);
                }
            }
        }

    }

    public void addDecorations(RegionLimitedWorldAccess regionlimitedworldaccess) {
        BlockFalling.instaFall = true;
        int i = regionlimitedworldaccess.a();
        int j = regionlimitedworldaccess.b();
        int k = i * 16;
        int l = j * 16;
        BlockPosition blockposition = new BlockPosition(k, 0, l);
        BiomeBase biomebase = regionlimitedworldaccess.c(i + 1, j + 1).getBiomeIndex()[0];
        SeededRandom seededrandom = new SeededRandom();
        long i1 = seededrandom.a(regionlimitedworldaccess.getSeed(), k, l);
        Decoration[] aworldgenstage_decoration = Decoration.values();
        int j1 = aworldgenstage_decoration.length;

        for(int k1 = 0; k1 < j1; ++k1) {
            Decoration worldgenstage_decoration = aworldgenstage_decoration[k1];
            biomebase.a(worldgenstage_decoration, this, regionlimitedworldaccess, i1, seededrandom, blockposition);
        }

        BlockFalling.instaFall = false;
    }

    public void a(IChunkAccess ichunkaccess, BiomeBase[] abiomebase, SeededRandom seededrandom, int i) {
        ChunkCoordIntPair chunkcoordintpair = ichunkaccess.getPos();
        int j = chunkcoordintpair.d();
        int k = chunkcoordintpair.e();
        double[] adouble = this.a(chunkcoordintpair.x, chunkcoordintpair.z);

        for(int l = 0; l < 16; ++l) {
            for(int i1 = 0; i1 < 16; ++i1) {
                int j1 = j + l;
                int k1 = k + i1;
                int l1 = ichunkaccess.a(Type.WORLD_SURFACE_WG, l, i1) + 1;
                abiomebase[i1 * 16 + l].a(seededrandom, ichunkaccess, j1, k1, l1, adouble[i1 * 16 + l], this.getSettings().r(), this.getSettings().s(), i, this.a.getSeed());
            }
        }

    }

    public abstract C getSettings();

    public abstract double[] a(int var1, int var2);

    public boolean canSpawnStructure(BiomeBase biomebase, StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
        return biomebase.a(structuregenerator);
    }

    @Nullable
    public WorldGenFeatureConfiguration getFeatureConfiguration(BiomeBase biomebase, StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
        return biomebase.b(structuregenerator);
    }

    public WorldChunkManager getWorldChunkManager() {
        return this.c;
    }

    public long getSeed() {
        return this.b;
    }

    public Long2ObjectMap<StructureStart> getStructureStartCache(StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
        return (Long2ObjectMap)this.d.computeIfAbsent(structuregenerator, (s) -> {
            return Long2ObjectMaps.synchronize(new ExpiringMap(8192, 10000));
        });
    }

    public Long2ObjectMap<LongSet> getStructureCache(StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
        return (Long2ObjectMap)this.e.computeIfAbsent(structuregenerator, (s) -> {
            return Long2ObjectMaps.synchronize(new ExpiringMap(8192, 10000));
        });
    }

    public int e() {
        return 256;
    }

    public World getWorld() {
        return this.a.getMinecraftWorld();
    }
}

and here's the CHunkGenerator class:

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package net.minecraft.server.v1_13_R1;

import java.util.List;
import javax.annotation.Nullable;
import net.minecraft.server.v1_13_R1.BiomeBase.BiomeMeta;
import net.minecraft.server.v1_13_R1.WorldGenStage.Features;
import org.bukkit.craftbukkit.libs.it.unimi.dsi.fastutil.longs.Long2ObjectMap;
import org.bukkit.craftbukkit.libs.it.unimi.dsi.fastutil.longs.LongSet;

public interface ChunkGenerator<C extends GeneratorSettings> {
    void createChunk(IChunkAccess var1);

    void addFeatures(RegionLimitedWorldAccess var1, Features var2);

    void addDecorations(RegionLimitedWorldAccess var1);

    void addMobs(RegionLimitedWorldAccess var1);

    List<BiomeMeta> getMobsFor(EnumCreatureType var1, BlockPosition var2);

    @Nullable
    BlockPosition findNearestMapFeature(World var1, String var2, BlockPosition var3, int var4);

    C getSettings();

    int a(World var1, boolean var2, boolean var3);

    boolean canSpawnStructure(BiomeBase var1, StructureGenerator<? extends WorldGenFeatureConfiguration> var2);

    @Nullable
    WorldGenFeatureConfiguration getFeatureConfiguration(BiomeBase var1, StructureGenerator<? extends WorldGenFeatureConfiguration> var2);

    Long2ObjectMap<StructureStart> getStructureStartCache(StructureGenerator<? extends WorldGenFeatureConfiguration> var1);

    Long2ObjectMap<LongSet> getStructureCache(StructureGenerator<? extends WorldGenFeatureConfiguration> var1);

    WorldChunkManager getWorldChunkManager();

    long getSeed();

    int getSpawnHeight();

    int e();

    World getWorld();
}

Quote

August 2, 20187 yr

40 minutes ago, Auties said:

I'm using spigot for this project

But not Forge, so why are you on the Forge forums?

40 minutes ago, Auties said:

as I'm working only with nms

Whatever that is.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable. If you think this is the case, JUST REPORT ME. Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

DO NOT PM ME WITH PROBLEMS. No help will be given.

Quote

August 2, 20187 yr

Author

Because no one was able to help me on the spigot ones. Nms means net minecraft server

Quote

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[1.13] WorldChunkManager

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