Auties

Well no: [13:36:12 WARN]: Caused by: java.lang.ClassCastException: current.CustomChunkProvider cannot be cast to net.minecraft.server.v1_13_R1.ChunkProviderServer [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.WorldServer.getChunkProviderServer(WorldServer.java:1049) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.WorldServer.a(WorldServer.java:444) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.WorldServer.isChunkLoaded(WorldServer.java:440) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.IWorldReader.b(SourceFile:400) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.IWorldReader.isLoaded(SourceFile:396) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.World.getBiome(World.java:207) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.WorldProviderNormal.a(SourceFile:200) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.WorldProviderNormal.a(SourceFile:186) [13:36:12 WARN]: at net.minecraft.server.v1_13_R1.WorldServer.b(WorldServer.java:821) [13:36:12 WARN]: at net.minecraft.server

Hi guys, I'm currently working on a project and I have a simple question: How can I get The ChunkProviderServer(that implements IChunkProvider) of a World? Casting is not possible, than how can I find it?

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

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(); }