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Choose biomes for world type

PixelRafael

By PixelRafael
in Modder Support

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PixelRafael

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Hi guys, i'm making a world type, i tried everything to choose which biomes to spawn on it, but is not working =(

For example, on this code, i tried choose only the biome desert:

 

 

ModExample.java

 

 

package examplemod;
import java.util.Set;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.registry.GameRegistry;
@Mod(modid="examplemod", name="Mod de Examplo", version="0.0.1")
public class ModExample {

public static Block BlockTest;
public static TestWorldType WorldTypeTest;

public static CreativeTabs scratchTab = new CreativeTabs("Mod"){
  public Item getTabIconItem(){
   return Items.emerald;
  }
};

@EventHandler
public void init(FMLPreInitializationEvent event){

  BlockTest = new BlockTest().setCreativeTab(scratchTab);
  GameRegistry.registerBlock(BlockTest, "Bloco Teste");

  WorldTypeTest = new TestWorldType("Test");

}
}

 

 

TestWorldType.java

 

 

package examplemod;

import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.WorldChunkManager;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.ChunkProviderGenerate;

public class TestWorldType extends WorldType{

    public TestWorldType(String name)
    {
        super(name);
    }

    public IChunkProvider getChunkGenerator(World world, String generatorOptions)
    {
        return new ChunkProviderSky(world, world.getSeed(), world.getWorldInfo().isMapFeaturesEnabled());
    }

    @Override
    public WorldChunkManager getChunkManager(World world)
    {
        return new WorldChunkManagerSky(world);
    }

}

 

 

 

ChunkProviderSky.java

 

 

package examplemod;

import java.util.List;
import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.block.BlockFalling;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.init.Blocks;
import net.minecraft.util.IProgressUpdate;
import net.minecraft.util.MathHelper;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.SpawnerAnimals;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.chunk.Chunk;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.MapGenBase;
import net.minecraft.world.gen.MapGenCaves;
import net.minecraft.world.gen.MapGenRavine;
import net.minecraft.world.gen.NoiseGenerator;
import net.minecraft.world.gen.NoiseGeneratorOctaves;
import net.minecraft.world.gen.NoiseGeneratorPerlin;
import net.minecraft.world.gen.feature.WorldGenDungeons;
import net.minecraft.world.gen.feature.WorldGenLakes;
import net.minecraft.world.gen.structure.MapGenMineshaft;
import net.minecraft.world.gen.structure.MapGenScatteredFeature;
import net.minecraft.world.gen.structure.MapGenStronghold;
import net.minecraft.world.gen.structure.MapGenVillage;
import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.*;
import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.*;
import net.minecraftforge.common.*;
import cpw.mods.fml.common.eventhandler.Event.*;
import net.minecraftforge.event.terraingen.*;

public class ChunkProviderSky implements IChunkProvider
{
    /**
     * RNG.
     */
    private Random rand;
    private NoiseGeneratorOctaves field_147431_j;
    private NoiseGeneratorOctaves field_147432_k;
    private NoiseGeneratorOctaves field_147429_l;
    private NoiseGeneratorPerlin field_147430_m;
    /**
     * A NoiseGeneratorOctaves used in generating terrain
     */
    public NoiseGeneratorOctaves noiseGen5;
    /**
     * A NoiseGeneratorOctaves used in generating terrain
     */
    public NoiseGeneratorOctaves noiseGen6;
    public NoiseGeneratorOctaves mobSpawnerNoise;
    /**
     * Reference to the World object.
     */
    private World worldObj;
    /**
     * are map structures going to be generated (e.g. strongholds)
     */
    private final boolean mapFeaturesEnabled;
    private WorldType field_147435_p;
    private final double[] field_147434_q;
    private final float[] parabolicField;
    private double[] stoneNoise = new double[256];
    private MapGenBase caveGenerator = new MapGenCaves();
    /**
     * Holds Stronghold Generator
     */
    private MapGenStronghold strongholdGenerator = new MapGenStronghold();
    /**
     * Holds Village Generator
     */
    private MapGenVillage villageGenerator = new MapGenVillage();
    /**
     * Holds Mineshaft Generator
     */
    private MapGenMineshaft mineshaftGenerator = new MapGenMineshaft();
    private MapGenScatteredFeature scatteredFeatureGenerator = new MapGenScatteredFeature();
    /**
     * Holds ravine generator
     */
    private MapGenBase ravineGenerator = new MapGenRavine();
    /**
     * The biomes that are used to generate the chunk
     */
    private BiomeGenBase[] biomesForGeneration = {BiomeGenBase.desert};
    double[] field_147427_d;
    double[] field_147428_e;
    double[] field_147425_f;
    double[] field_147426_g;
    int[][] field_73219_j = new int[32][32];
    private static final String __OBFID = "CL_00000396";

    {
        caveGenerator = TerrainGen.getModdedMapGen(caveGenerator, CAVE);
        strongholdGenerator = (MapGenStronghold) TerrainGen.getModdedMapGen(strongholdGenerator, STRONGHOLD);
        villageGenerator = (MapGenVillage) TerrainGen.getModdedMapGen(villageGenerator, VILLAGE);
        mineshaftGenerator = (MapGenMineshaft) TerrainGen.getModdedMapGen(mineshaftGenerator, MINESHAFT);
        scatteredFeatureGenerator = (MapGenScatteredFeature) TerrainGen.getModdedMapGen(scatteredFeatureGenerator, SCATTERED_FEATURE);
        ravineGenerator = TerrainGen.getModdedMapGen(ravineGenerator, RAVINE);
    }    

    public ChunkProviderSky(World par1World, long par2, boolean par4)
    {
        this.worldObj = par1World;
        this.mapFeaturesEnabled = par4;
        this.field_147435_p = par1World.getWorldInfo().getTerrainType();
        this.rand = new Random(par2);
        this.field_147431_j = new NoiseGeneratorOctaves(this.rand, 16);
        this.field_147432_k = new NoiseGeneratorOctaves(this.rand, 16);
        this.field_147429_l = new NoiseGeneratorOctaves(this.rand, ;
        this.field_147430_m = new NoiseGeneratorPerlin(this.rand, 4);
        this.noiseGen5 = new NoiseGeneratorOctaves(this.rand, 10);
        this.noiseGen6 = new NoiseGeneratorOctaves(this.rand, 16);
        this.mobSpawnerNoise = new NoiseGeneratorOctaves(this.rand, ;
        this.field_147434_q = new double[825];
        this.parabolicField = new float[25];

        for (int j = -2; j <= 2; ++j)
        {
            for (int k = -2; k <= 2; ++k)
            {
                float f = 10.0F / MathHelper.sqrt_float((float)(j * j + k * k) + 0.2F);
                this.parabolicField[j + 2 + (k + 2) * 5] = f;
            }
        }

        NoiseGenerator[] noiseGens = {field_147431_j, field_147432_k, field_147429_l, field_147430_m, noiseGen5, noiseGen6, mobSpawnerNoise};
        noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, this.rand, noiseGens);
        this.field_147431_j = (NoiseGeneratorOctaves)noiseGens[0];
        this.field_147432_k = (NoiseGeneratorOctaves)noiseGens[1];
        this.field_147429_l = (NoiseGeneratorOctaves)noiseGens[2];
        this.field_147430_m = (NoiseGeneratorPerlin)noiseGens[3];
        this.noiseGen5 = (NoiseGeneratorOctaves)noiseGens[4];
        this.noiseGen6 = (NoiseGeneratorOctaves)noiseGens[5];
        this.mobSpawnerNoise = (NoiseGeneratorOctaves)noiseGens[6];
    }

    public void func_147424_a(int p_147424_1_, int p_147424_2_, Block[] p_147424_3_)
    {
        byte b0 = 63;
        this.biomesForGeneration = this.worldObj.getWorldChunkManager().getBiomesForGeneration(this.biomesForGeneration, p_147424_1_ * 4 - 2, p_147424_2_ * 4 - 2, 10, 10);
        this.func_147423_a(p_147424_1_ * 4, 0, p_147424_2_ * 4);

        for (int k = 0; k < 4; ++k)
        {
            int l = k * 5;
            int i1 = (k + 1) * 5;

            for (int j1 = 0; j1 < 4; ++j1)
            {
                int k1 = (l + j1) * 33;
                int l1 = (l + j1 + 1) * 33;
                int i2 = (i1 + j1) * 33;
                int j2 = (i1 + j1 + 1) * 33;

                for (int k2 = 0; k2 < 32; ++k2)
                {
                    double d0 = 0.125D;
                    double d1 = this.field_147434_q[k1 + k2];
                    double d2 = this.field_147434_q[l1 + k2];
                    double d3 = this.field_147434_q[i2 + k2];
                    double d4 = this.field_147434_q[j2 + k2];
                    double d5 = (this.field_147434_q[k1 + k2 + 1] - d1) * d0;
                    double d6 = (this.field_147434_q[l1 + k2 + 1] - d2) * d0;
                    double d7 = (this.field_147434_q[i2 + k2 + 1] - d3) * d0;
                    double d8 = (this.field_147434_q[j2 + k2 + 1] - d4) * d0;

                    for (int l2 = 0; l2 < 8; ++l2)
                    {
                        double d9 = 0.25D;
                        double d10 = d1;
                        double d11 = d2;
                        double d12 = (d3 - d1) * d9;
                        double d13 = (d4 - d2) * d9;

                        for (int i3 = 0; i3 < 4; ++i3)
                        {
                            int j3 = i3 + k * 4 << 12 | 0 + j1 * 4 << 8 | k2 * 8 + l2;
                            short short1 = 256;
                            j3 -= short1;
                            double d14 = 0.25D;
                            double d16 = (d11 - d10) * d14;
                            double d15 = d10 - d16;

                            for (int k3 = 0; k3 < 4; ++k3)
                            {
                                if ((d15 += d16) > 0.0D)
                                {
                                    p_147424_3_[j3 += short1] = Blocks.stone;
                                }
                                else if (k2 * 8 + l2 < b0)
                                {
                                    p_147424_3_[j3 += short1] = Blocks.water;
                                }
                                else
                                {
                                    p_147424_3_[j3 += short1] = null;
                                }
                            }

                            d10 += d12;
                            d11 += d13;
                        }

                        d1 += d5;
                        d2 += d6;
                        d3 += d7;
                        d4 += d8;
                    }
                }
            }
        }
    }

    public void replaceBlocksForBiome(int p_147422_1_, int p_147422_2_, Block[] p_147422_3_, byte[] p_147422_4_, BiomeGenBase[] p_147422_5_)
    {
        ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, p_147422_1_, p_147422_2_, p_147422_3_, p_147422_5_);
        MinecraftForge.EVENT_BUS.post(event);
        if (event.getResult() == Result.DENY) return;

        double d0 = 0.03125D;
        this.stoneNoise = this.field_147430_m.func_151599_a(this.stoneNoise, (double)(p_147422_1_ * 16), (double)(p_147422_2_ * 16), 16, 16, d0 * 2.0D, d0 * 2.0D, 1.0D);

        for (int k = 0; k < 16; ++k)
        {
            for (int l = 0; l < 16; ++l)
            {
                BiomeGenBase biomegenbase = p_147422_5_[l + k * 16];
                biomegenbase.genTerrainBlocks(this.worldObj, this.rand, p_147422_3_, p_147422_4_, p_147422_1_ * 16 + k, p_147422_2_ * 16 + l, this.stoneNoise[l + k * 16]);
            }
        }
    }

    /**
     * loads or generates the chunk at the chunk location specified
     */
    public Chunk loadChunk(int par1, int par2)
    {
        return this.provideChunk(par1, par2);
    }

    /**
     * Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
     * specified chunk from the map seed and chunk seed
     */
    public Chunk provideChunk(int par1, int par2)
    {
        this.rand.setSeed((long)par1 * 341873128712L + (long)par2 * 132897987541L);
        Block[] ablock = new Block[65536];
        byte[] abyte = new byte[65536];
        this.func_147424_a(par1, par2, ablock);
        this.biomesForGeneration = this.worldObj.getWorldChunkManager().loadBlockGeneratorData(this.biomesForGeneration, par1 * 16, par2 * 16, 16, 16);
        this.replaceBlocksForBiome(par1, par2, ablock, abyte, this.biomesForGeneration);
        this.caveGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
        this.ravineGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);

        if (this.mapFeaturesEnabled)
        {
            this.mineshaftGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
            this.villageGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
            this.strongholdGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
            this.scatteredFeatureGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
        }

        Chunk chunk = new Chunk(this.worldObj, ablock, abyte, par1, par2);
        byte[] abyte1 = chunk.getBiomeArray();

        for (int k = 0; k < abyte1.length; ++k)
        {
            abyte1[k] = (byte)this.biomesForGeneration[k].biomeID;
        }

        chunk.generateSkylightMap();
        return chunk;
    }

    private void func_147423_a(int p_147423_1_, int p_147423_2_, int p_147423_3_)
    {
        double d0 = 684.412D;
        double d1 = 684.412D;
        double d2 = 512.0D;
        double d3 = 512.0D;
        this.field_147426_g = this.noiseGen6.generateNoiseOctaves(this.field_147426_g, p_147423_1_, p_147423_3_, 5, 5, 200.0D, 200.0D, 0.5D);
        this.field_147427_d = this.field_147429_l.generateNoiseOctaves(this.field_147427_d, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 8.555150000000001D, 4.277575000000001D, 8.555150000000001D);
        this.field_147428_e = this.field_147431_j.generateNoiseOctaves(this.field_147428_e, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 684.412D, 684.412D, 684.412D);
        this.field_147425_f = this.field_147432_k.generateNoiseOctaves(this.field_147425_f, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 684.412D, 684.412D, 684.412D);
        boolean flag1 = false;
        boolean flag = false;
        int l = 0;
        int i1 = 0;
        double d4 = 8.5D;

        for (int j1 = 0; j1 < 5; ++j1)
        {
            for (int k1 = 0; k1 < 5; ++k1)
            {
                float f = 0.0F;
                float f1 = 0.0F;
                float f2 = 0.0F;
                byte b0 = 2;
                BiomeGenBase biomegenbase = this.biomesForGeneration[j1 + 2 + (k1 + 2) * 10];

                for (int l1 = -b0; l1 <= b0; ++l1)
                {
                    for (int i2 = -b0; i2 <= b0; ++i2)
                    {
                        BiomeGenBase biomegenbase1 = this.biomesForGeneration[j1 + l1 + 2 + (k1 + i2 + 2) * 10];
                        float f3 = biomegenbase1.rootHeight;
                        float f4 = biomegenbase1.heightVariation;

                        if (this.field_147435_p == WorldType.AMPLIFIED && f3 > 0.0F)
                        {
                            f3 = 1.0F + f3 * 2.0F;
                            f4 = 1.0F + f4 * 4.0F;
                        }

                        float f5 = this.parabolicField[l1 + 2 + (i2 + 2) * 5] / (f3 + 2.0F);

                        if (biomegenbase1.rootHeight > biomegenbase.rootHeight)
                        {
                            f5 /= 2.0F;
                        }

                        f += f4 * f5;
                        f1 += f3 * f5;
                        f2 += f5;
                    }
                }

                f /= f2;
                f1 /= f2;
                f = f * 0.9F + 0.1F;
                f1 = (f1 * 4.0F - 1.0F) / 8.0F;
                double d13 = this.field_147426_g[i1] / 8000.0D;

                if (d13 < 0.0D)
                {
                    d13 = -d13 * 0.3D;
                }

                d13 = d13 * 3.0D - 2.0D;

                if (d13 < 0.0D)
                {
                    d13 /= 2.0D;

                    if (d13 < -1.0D)
                    {
                        d13 = -1.0D;
                    }

                    d13 /= 1.4D;
                    d13 /= 2.0D;
                }
                else
                {
                    if (d13 > 1.0D)
                    {
                        d13 = 1.0D;
                    }

                    d13 /= 8.0D;
                }

                ++i1;
                double d12 = (double)f1;
                double d14 = (double)f;
                d12 += d13 * 0.2D;
                d12 = d12 * 8.5D / 8.0D;
                double d5 = 8.5D + d12 * 4.0D;

                for (int j2 = 0; j2 < 33; ++j2)
                {
                    double d6 = ((double)j2 - d5) * 12.0D * 128.0D / 256.0D / d14;

                    if (d6 < 0.0D)
                    {
                        d6 *= 4.0D;
                    }

                    double d7 = this.field_147428_e[l] / 512.0D;
                    double d8 = this.field_147425_f[l] / 512.0D;
                    double d9 = (this.field_147427_d[l] / 10.0D + 1.0D) / 2.0D;
                    double d10 = MathHelper.denormalizeClamp(d7, d8, d9) - d6;

                    if (j2 > 29)
                    {
                        double d11 = (double)((float)(j2 - 29) / 3.0F);
                        d10 = d10 * (1.0D - d11) + -10.0D * d11;
                    }

                    this.field_147434_q[l] = d10;
                    ++l;
                }
            }
        }
    }

    /**
     * Checks to see if a chunk exists at x, y
     */
    public boolean chunkExists(int par1, int par2)
    {
        return true;
    }

    /**
     * Populates chunk with ores etc etc
     */
    public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
    {
        BlockFalling.fallInstantly = true;
        int k = par2 * 16;
        int l = par3 * 16;
        BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(k + 16, l + 16);
        this.rand.setSeed(this.worldObj.getSeed());
        long i1 = this.rand.nextLong() / 2L * 2L + 1L;
        long j1 = this.rand.nextLong() / 2L * 2L + 1L;
        this.rand.setSeed((long)par2 * i1 + (long)par3 * j1 ^ this.worldObj.getSeed());
        boolean flag = false;

        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, worldObj, rand, par2, par3, flag));

        if (this.mapFeaturesEnabled)
        {
            this.mineshaftGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
            flag = this.villageGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
            this.strongholdGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
            this.scatteredFeatureGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
        }

        int k1;
        int l1;
        int i2;

        if (biomegenbase != BiomeGenBase.desert && biomegenbase != BiomeGenBase.desertHills && !flag && this.rand.nextInt(4) == 0
            && TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, LAKE))
        {
            k1 = k + this.rand.nextInt(16) + 8;
            l1 = this.rand.nextInt(256);
            i2 = l + this.rand.nextInt(16) + 8;
            (new WorldGenLakes(Blocks.water)).generate(this.worldObj, this.rand, k1, l1, i2);
        }

        if (TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, LAVA) && !flag && this.rand.nextInt( == 0)
        {
            k1 = k + this.rand.nextInt(16) + 8;
            l1 = this.rand.nextInt(this.rand.nextInt(248) + ;
            i2 = l + this.rand.nextInt(16) + 8;

            if (l1 < 63 || this.rand.nextInt(10) == 0)
            {
                (new WorldGenLakes(Blocks.lava)).generate(this.worldObj, this.rand, k1, l1, i2);
            }
        }

        boolean doGen = TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, DUNGEON);
        for (k1 = 0; doGen && k1 < 8; ++k1)
        {
            l1 = k + this.rand.nextInt(16) + 8;
            i2 = this.rand.nextInt(256);
            int j2 = l + this.rand.nextInt(16) + 8;
            (new WorldGenDungeons()).generate(this.worldObj, this.rand, l1, i2, j2);
        }

        biomegenbase.decorate(this.worldObj, this.rand, k, l);
        SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);
        k += 8;
        l += 8;

        doGen = TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, ICE);
        for (k1 = 0; doGen && k1 < 16; ++k1)
        {
            for (l1 = 0; l1 < 16; ++l1)
            {
                i2 = this.worldObj.getPrecipitationHeight(k + k1, l + l1);

                if (this.worldObj.isBlockFreezable(k1 + k, i2 - 1, l1 + l))
                {
                    this.worldObj.setBlock(k1 + k, i2 - 1, l1 + l, Blocks.ice, 0, 2);
                }

                if (this.worldObj.func_147478_e(k1 + k, i2, l1 + l, true))
                {
                    this.worldObj.setBlock(k1 + k, i2, l1 + l, Blocks.snow_layer, 0, 2);
                }
            }
        }

        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, worldObj, rand, par2, par3, flag));

        BlockFalling.fallInstantly = false;
    }

    /**
     * Two modes of operation: if passed true, save all Chunks in one go.  If passed false, save up to two chunks.
     * Return true if all chunks have been saved.
     */
    public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
    {
        return true;
    }

    /**
     * Save extra data not associated with any Chunk.  Not saved during autosave, only during world unload.  Currently
     * unimplemented.
     */
    public void saveExtraData() {}

    /**
     * Unloads chunks that are marked to be unloaded. This is not guaranteed to unload every such chunk.
     */
    public boolean unloadQueuedChunks()
    {
        return false;
    }

    /**
     * Returns if the IChunkProvider supports saving.
     */
    public boolean canSave()
    {
        return true;
    }

    /**
     * Converts the instance data to a readable string.
     */
    public String makeString()
    {
        return "RandomLevelSource";
    }

    /**
     * Returns a list of creatures of the specified type that can spawn at the given location.
     */
    public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
    {
        BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(par2, par4);
        return par1EnumCreatureType == EnumCreatureType.monster && this.scatteredFeatureGenerator.func_143030_a(par2, par3, par4) ? this.scatteredFeatureGenerator.getScatteredFeatureSpawnList() : biomegenbase.getSpawnableList(par1EnumCreatureType);
    }

    public ChunkPosition func_147416_a(World p_147416_1_, String p_147416_2_, int p_147416_3_, int p_147416_4_, int p_147416_5_)
    {
        return "Stronghold".equals(p_147416_2_) && this.strongholdGenerator != null ? this.strongholdGenerator.func_151545_a(p_147416_1_, p_147416_3_, p_147416_4_, p_147416_5_) : null;
    }

    public int getLoadedChunkCount()
    {
        return 0;
    }

    public void recreateStructures(int par1, int par2)
    {
        if (this.mapFeaturesEnabled)
        {
            this.mineshaftGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
            this.villageGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
            this.strongholdGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
            this.scatteredFeatureGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
        }
    }
}

 

 

WorldChunkManagerSky.java

 

 

package examplemod;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

import net.minecraft.crash.CrashReport;
import net.minecraft.crash.CrashReportCategory;
import net.minecraft.util.ReportedException;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeCache;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.biome.WorldChunkManager;
import net.minecraft.world.gen.layer.GenLayer;
import net.minecraft.world.gen.layer.IntCache;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.terraingen.WorldTypeEvent;
import static net.minecraft.world.biome.BiomeGenBase.*;


public class WorldChunkManagerSky extends WorldChunkManager
{
    public static ArrayList<BiomeGenBase> allowedBiomes = new ArrayList<BiomeGenBase>(Arrays.asList(desert));
    private GenLayer genBiomes;
    /**
     * A GenLayer containing the indices into BiomeGenBase.biomeList[]
     */
    private GenLayer biomeIndexLayer;
    /**
     * The BiomeCache object for this world.
     */
    private BiomeCache biomeCache;
    /**
     * A list of biomes that the player can spawn in.
     */
    private List biomesToSpawnIn;
    private static final String __OBFID = "CL_00000166";

    protected WorldChunkManagerSky()
    {
        this.biomeCache = new BiomeCache(this);
        this.biomesToSpawnIn = new ArrayList();
        this.biomesToSpawnIn.addAll(allowedBiomes);
    }

    public WorldChunkManagerSky(long par1, WorldType par3WorldType)
    {
        this();
        GenLayer[] agenlayer = GenLayer.initializeAllBiomeGenerators(par1, par3WorldType);
        agenlayer = getModdedBiomeGenerators(par3WorldType, par1, agenlayer);
        this.genBiomes = agenlayer[0];
        this.biomeIndexLayer = agenlayer[1];
    }

    public WorldChunkManagerSky(World par1World)
    {
        this(par1World.getSeed(), par1World.getWorldInfo().getTerrainType());
    }

    /**
     * Gets the list of valid biomes for the player to spawn in.
     */
    public List getBiomesToSpawnIn()
    {
        return this.biomesToSpawnIn;
    }

    /**
     * Returns the BiomeGenBase related to the x, z position on the world.
     */
    public BiomeGenBase getBiomeGenAt(int par1, int par2)
    {
        return this.biomeCache.getBiomeGenAt(par1, par2);
    }

    /**
     * Returns a list of rainfall values for the specified blocks. Args: listToReuse, x, z, width, length.
     */
    public float[] getRainfall(float[] par1ArrayOfFloat, int par2, int par3, int par4, int par5)
    {
        IntCache.resetIntCache();

        if (par1ArrayOfFloat == null || par1ArrayOfFloat.length < par4 * par5)
        {
            par1ArrayOfFloat = new float[par4 * par5];
        }

        int[] aint = this.biomeIndexLayer.getInts(par2, par3, par4, par5);

        for (int i1 = 0; i1 < par4 * par5; ++i1)
        {
            try
            {
                float f = (float)BiomeGenBase.getBiome(aint[i1]).getIntRainfall() / 65536.0F;

                if (f > 1.0F)
                {
                    f = 1.0F;
                }

                par1ArrayOfFloat[i1] = f;
            }
            catch (Throwable throwable)
            {
                CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
                CrashReportCategory crashreportcategory = crashreport.makeCategory("DownfallBlock");
                crashreportcategory.addCrashSection("biome id", Integer.valueOf(i1));
                crashreportcategory.addCrashSection("downfalls[] size", Integer.valueOf(par1ArrayOfFloat.length));
                crashreportcategory.addCrashSection("x", Integer.valueOf(par2));
                crashreportcategory.addCrashSection("z", Integer.valueOf(par3));
                crashreportcategory.addCrashSection("w", Integer.valueOf(par4));
                crashreportcategory.addCrashSection("h", Integer.valueOf(par5));
                throw new ReportedException(crashreport);
            }
        }

        return par1ArrayOfFloat;
    }

    /**
     * Return an adjusted version of a given temperature based on the y height
     */
    @SideOnly(Side.CLIENT)
    public float getTemperatureAtHeight(float par1, int par2)
    {
        return par1;
    }

    /**
     * Returns an array of biomes for the location input.
     */
    public BiomeGenBase[] getBiomesForGeneration(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
    {
        IntCache.resetIntCache();

        if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
        {
            par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
        }

        int[] aint = this.genBiomes.getInts(par2, par3, par4, par5);

        try
        {
            for (int i1 = 0; i1 < par4 * par5; ++i1)
            {
                par1ArrayOfBiomeGenBase[i1] = BiomeGenBase.getBiome(aint[i1]);
            }

            return par1ArrayOfBiomeGenBase;
        }
        catch (Throwable throwable)
        {
            CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
            CrashReportCategory crashreportcategory = crashreport.makeCategory("RawBiomeBlock");
            crashreportcategory.addCrashSection("biomes[] size", Integer.valueOf(par1ArrayOfBiomeGenBase.length));
            crashreportcategory.addCrashSection("x", Integer.valueOf(par2));
            crashreportcategory.addCrashSection("z", Integer.valueOf(par3));
            crashreportcategory.addCrashSection("w", Integer.valueOf(par4));
            crashreportcategory.addCrashSection("h", Integer.valueOf(par5));
            throw new ReportedException(crashreport);
        }
    }

    /**
     * Returns biomes to use for the blocks and loads the other data like temperature and humidity onto the
     * WorldChunkManager Args: oldBiomeList, x, z, width, depth
     */
    public BiomeGenBase[] loadBlockGeneratorData(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
    {
        return this.getBiomeGenAt(par1ArrayOfBiomeGenBase, par2, par3, par4, par5, true);
    }

    /**
     * Return a list of biomes for the specified blocks. Args: listToReuse, x, y, width, length, cacheFlag (if false,
     * don't check biomeCache to avoid infinite loop in BiomeCacheBlock)
     */
    public BiomeGenBase[] getBiomeGenAt(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5, boolean par6)
    {
        IntCache.resetIntCache();

        if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
        {
            par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
        }

        if (par6 && par4 == 16 && par5 == 16 && (par2 & 15) == 0 && (par3 & 15) == 0)
        {
            BiomeGenBase[] abiomegenbase1 = this.biomeCache.getCachedBiomes(par2, par3);
            System.arraycopy(abiomegenbase1, 0, par1ArrayOfBiomeGenBase, 0, par4 * par5);
            return par1ArrayOfBiomeGenBase;
        }
        else
        {
            int[] aint = this.biomeIndexLayer.getInts(par2, par3, par4, par5);

            for (int i1 = 0; i1 < par4 * par5; ++i1)
            {
                par1ArrayOfBiomeGenBase[i1] = BiomeGenBase.getBiome(aint[i1]);
            }

            return par1ArrayOfBiomeGenBase;
        }
    }

    /**
     * checks given Chunk's Biomes against List of allowed ones
     */
    public boolean areBiomesViable(int par1, int par2, int par3, List par4List)
    {
        IntCache.resetIntCache();
        int l = par1 - par3 >> 2;
        int i1 = par2 - par3 >> 2;
        int j1 = par1 + par3 >> 2;
        int k1 = par2 + par3 >> 2;
        int l1 = j1 - l + 1;
        int i2 = k1 - i1 + 1;
        int[] aint = this.genBiomes.getInts(l, i1, l1, i2);

        try
        {
            for (int j2 = 0; j2 < l1 * i2; ++j2)
            {
                BiomeGenBase biomegenbase = BiomeGenBase.getBiome(aint[j2]);

                if (!par4List.contains(biomegenbase))
                {
                    return false;
                }
            }

            return true;
        }
        catch (Throwable throwable)
        {
            CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
            CrashReportCategory crashreportcategory = crashreport.makeCategory("Layer");
            crashreportcategory.addCrashSection("Layer", this.genBiomes.toString());
            crashreportcategory.addCrashSection("x", Integer.valueOf(par1));
            crashreportcategory.addCrashSection("z", Integer.valueOf(par2));
            crashreportcategory.addCrashSection("radius", Integer.valueOf(par3));
            crashreportcategory.addCrashSection("allowed", par4List);
            throw new ReportedException(crashreport);
        }
    }

    public ChunkPosition findBiomePosition(int p_150795_1_, int p_150795_2_, int p_150795_3_, List p_150795_4_, Random p_150795_5_)
    {
        IntCache.resetIntCache();
        int l = p_150795_1_ - p_150795_3_ >> 2;
        int i1 = p_150795_2_ - p_150795_3_ >> 2;
        int j1 = p_150795_1_ + p_150795_3_ >> 2;
        int k1 = p_150795_2_ + p_150795_3_ >> 2;
        int l1 = j1 - l + 1;
        int i2 = k1 - i1 + 1;
        int[] aint = this.genBiomes.getInts(l, i1, l1, i2);
        ChunkPosition chunkposition = null;
        int j2 = 0;

        for (int k2 = 0; k2 < l1 * i2; ++k2)
        {
            int l2 = l + k2 % l1 << 2;
            int i3 = i1 + k2 / l1 << 2;
            BiomeGenBase biomegenbase = BiomeGenBase.getBiome(aint[k2]);

            if (p_150795_4_.contains(biomegenbase) && (chunkposition == null || p_150795_5_.nextInt(j2 + 1) == 0))
            {
                chunkposition = new ChunkPosition(l2, 0, i3);
                ++j2;
            }
        }

        return chunkposition;
    }

    /**
     * Calls the WorldChunkManager's biomeCache.cleanupCache()
     */
    public void cleanupCache()
    {
        this.biomeCache.cleanupCache();
    }

    public GenLayer[] getModdedBiomeGenerators(WorldType worldType, long seed, GenLayer[] original)
    {
        WorldTypeEvent.InitBiomeGens event = new WorldTypeEvent.InitBiomeGens(worldType, seed, original);
        MinecraftForge.TERRAIN_GEN_BUS.post(event);
        return event.newBiomeGens;
    }
}

 

 

 

 

 

Everything is working except the biomes, is generating all biomes.

But I want only the desert, for example.

And sorry about my english, im brazilian xD

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Jacky2611 Diamond Finder

Jacky2611

Posted
Posted

Hi guys, i'm making a world type, i tried everything to choose which biomes to spawn on it, but is not working =(

For example, on this code, i tried choose only the biome desert:

 

 

ModExample.java

 

 

package examplemod;
import java.util.Set;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.registry.GameRegistry;
@Mod(modid="examplemod", name="Mod de Examplo", version="0.0.1")
public class ModExample {

public static Block BlockTest;
public static TestWorldType WorldTypeTest;

public static CreativeTabs scratchTab = new CreativeTabs("Mod"){
  public Item getTabIconItem(){
   return Items.emerald;
  }
};

@EventHandler
public void init(FMLPreInitializationEvent event){

  BlockTest = new BlockTest().setCreativeTab(scratchTab);
  GameRegistry.registerBlock(BlockTest, "Bloco Teste");

  WorldTypeTest = new TestWorldType("Test");

}
}

 

 

TestWorldType.java

 

 

package examplemod;

import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.WorldChunkManager;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.ChunkProviderGenerate;

public class TestWorldType extends WorldType{

    public TestWorldType(String name)
    {
        super(name);
    }

    public IChunkProvider getChunkGenerator(World world, String generatorOptions)
    {
        return new ChunkProviderSky(world, world.getSeed(), world.getWorldInfo().isMapFeaturesEnabled());
    }

    @Override
    public WorldChunkManager getChunkManager(World world)
    {
        return new WorldChunkManagerSky(world);
    }

}

 

 

 

ChunkProviderSky.java

 

 

package examplemod;

import java.util.List;
import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.block.BlockFalling;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.init.Blocks;
import net.minecraft.util.IProgressUpdate;
import net.minecraft.util.MathHelper;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.SpawnerAnimals;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.chunk.Chunk;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.MapGenBase;
import net.minecraft.world.gen.MapGenCaves;
import net.minecraft.world.gen.MapGenRavine;
import net.minecraft.world.gen.NoiseGenerator;
import net.minecraft.world.gen.NoiseGeneratorOctaves;
import net.minecraft.world.gen.NoiseGeneratorPerlin;
import net.minecraft.world.gen.feature.WorldGenDungeons;
import net.minecraft.world.gen.feature.WorldGenLakes;
import net.minecraft.world.gen.structure.MapGenMineshaft;
import net.minecraft.world.gen.structure.MapGenScatteredFeature;
import net.minecraft.world.gen.structure.MapGenStronghold;
import net.minecraft.world.gen.structure.MapGenVillage;
import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.*;
import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.*;
import net.minecraftforge.common.*;
import cpw.mods.fml.common.eventhandler.Event.*;
import net.minecraftforge.event.terraingen.*;

public class ChunkProviderSky implements IChunkProvider
{
    /**
     * RNG.
     */
    private Random rand;
    private NoiseGeneratorOctaves field_147431_j;
    private NoiseGeneratorOctaves field_147432_k;
    private NoiseGeneratorOctaves field_147429_l;
    private NoiseGeneratorPerlin field_147430_m;
    /**
     * A NoiseGeneratorOctaves used in generating terrain
     */
    public NoiseGeneratorOctaves noiseGen5;
    /**
     * A NoiseGeneratorOctaves used in generating terrain
     */
    public NoiseGeneratorOctaves noiseGen6;
    public NoiseGeneratorOctaves mobSpawnerNoise;
    /**
     * Reference to the World object.
     */
    private World worldObj;
    /**
     * are map structures going to be generated (e.g. strongholds)
     */
    private final boolean mapFeaturesEnabled;
    private WorldType field_147435_p;
    private final double[] field_147434_q;
    private final float[] parabolicField;
    private double[] stoneNoise = new double[256];
    private MapGenBase caveGenerator = new MapGenCaves();
    /**
     * Holds Stronghold Generator
     */
    private MapGenStronghold strongholdGenerator = new MapGenStronghold();
    /**
     * Holds Village Generator
     */
    private MapGenVillage villageGenerator = new MapGenVillage();
    /**
     * Holds Mineshaft Generator
     */
    private MapGenMineshaft mineshaftGenerator = new MapGenMineshaft();
    private MapGenScatteredFeature scatteredFeatureGenerator = new MapGenScatteredFeature();
    /**
     * Holds ravine generator
     */
    private MapGenBase ravineGenerator = new MapGenRavine();
    /**
     * The biomes that are used to generate the chunk
     */
    private BiomeGenBase[] biomesForGeneration = {BiomeGenBase.desert};
    double[] field_147427_d;
    double[] field_147428_e;
    double[] field_147425_f;
    double[] field_147426_g;
    int[][] field_73219_j = new int[32][32];
    private static final String __OBFID = "CL_00000396";

    {
        caveGenerator = TerrainGen.getModdedMapGen(caveGenerator, CAVE);
        strongholdGenerator = (MapGenStronghold) TerrainGen.getModdedMapGen(strongholdGenerator, STRONGHOLD);
        villageGenerator = (MapGenVillage) TerrainGen.getModdedMapGen(villageGenerator, VILLAGE);
        mineshaftGenerator = (MapGenMineshaft) TerrainGen.getModdedMapGen(mineshaftGenerator, MINESHAFT);
        scatteredFeatureGenerator = (MapGenScatteredFeature) TerrainGen.getModdedMapGen(scatteredFeatureGenerator, SCATTERED_FEATURE);
        ravineGenerator = TerrainGen.getModdedMapGen(ravineGenerator, RAVINE);
    }    

    public ChunkProviderSky(World par1World, long par2, boolean par4)
    {
        this.worldObj = par1World;
        this.mapFeaturesEnabled = par4;
        this.field_147435_p = par1World.getWorldInfo().getTerrainType();
        this.rand = new Random(par2);
        this.field_147431_j = new NoiseGeneratorOctaves(this.rand, 16);
        this.field_147432_k = new NoiseGeneratorOctaves(this.rand, 16);
        this.field_147429_l = new NoiseGeneratorOctaves(this.rand, ;
        this.field_147430_m = new NoiseGeneratorPerlin(this.rand, 4);
        this.noiseGen5 = new NoiseGeneratorOctaves(this.rand, 10);
        this.noiseGen6 = new NoiseGeneratorOctaves(this.rand, 16);
        this.mobSpawnerNoise = new NoiseGeneratorOctaves(this.rand, ;
        this.field_147434_q = new double[825];
        this.parabolicField = new float[25];

        for (int j = -2; j <= 2; ++j)
        {
            for (int k = -2; k <= 2; ++k)
            {
                float f = 10.0F / MathHelper.sqrt_float((float)(j * j + k * k) + 0.2F);
                this.parabolicField[j + 2 + (k + 2) * 5] = f;
            }
        }

        NoiseGenerator[] noiseGens = {field_147431_j, field_147432_k, field_147429_l, field_147430_m, noiseGen5, noiseGen6, mobSpawnerNoise};
        noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, this.rand, noiseGens);
        this.field_147431_j = (NoiseGeneratorOctaves)noiseGens[0];
        this.field_147432_k = (NoiseGeneratorOctaves)noiseGens[1];
        this.field_147429_l = (NoiseGeneratorOctaves)noiseGens[2];
        this.field_147430_m = (NoiseGeneratorPerlin)noiseGens[3];
        this.noiseGen5 = (NoiseGeneratorOctaves)noiseGens[4];
        this.noiseGen6 = (NoiseGeneratorOctaves)noiseGens[5];
        this.mobSpawnerNoise = (NoiseGeneratorOctaves)noiseGens[6];
    }

    public void func_147424_a(int p_147424_1_, int p_147424_2_, Block[] p_147424_3_)
    {
        byte b0 = 63;
        this.biomesForGeneration = this.worldObj.getWorldChunkManager().getBiomesForGeneration(this.biomesForGeneration, p_147424_1_ * 4 - 2, p_147424_2_ * 4 - 2, 10, 10);
        this.func_147423_a(p_147424_1_ * 4, 0, p_147424_2_ * 4);

        for (int k = 0; k < 4; ++k)
        {
            int l = k * 5;
            int i1 = (k + 1) * 5;

            for (int j1 = 0; j1 < 4; ++j1)
            {
                int k1 = (l + j1) * 33;
                int l1 = (l + j1 + 1) * 33;
                int i2 = (i1 + j1) * 33;
                int j2 = (i1 + j1 + 1) * 33;

                for (int k2 = 0; k2 < 32; ++k2)
                {
                    double d0 = 0.125D;
                    double d1 = this.field_147434_q[k1 + k2];
                    double d2 = this.field_147434_q[l1 + k2];
                    double d3 = this.field_147434_q[i2 + k2];
                    double d4 = this.field_147434_q[j2 + k2];
                    double d5 = (this.field_147434_q[k1 + k2 + 1] - d1) * d0;
                    double d6 = (this.field_147434_q[l1 + k2 + 1] - d2) * d0;
                    double d7 = (this.field_147434_q[i2 + k2 + 1] - d3) * d0;
                    double d8 = (this.field_147434_q[j2 + k2 + 1] - d4) * d0;

                    for (int l2 = 0; l2 < 8; ++l2)
                    {
                        double d9 = 0.25D;
                        double d10 = d1;
                        double d11 = d2;
                        double d12 = (d3 - d1) * d9;
                        double d13 = (d4 - d2) * d9;

                        for (int i3 = 0; i3 < 4; ++i3)
                        {
                            int j3 = i3 + k * 4 << 12 | 0 + j1 * 4 << 8 | k2 * 8 + l2;
                            short short1 = 256;
                            j3 -= short1;
                            double d14 = 0.25D;
                            double d16 = (d11 - d10) * d14;
                            double d15 = d10 - d16;

                            for (int k3 = 0; k3 < 4; ++k3)
                            {
                                if ((d15 += d16) > 0.0D)
                                {
                                    p_147424_3_[j3 += short1] = Blocks.stone;
                                }
                                else if (k2 * 8 + l2 < b0)
                                {
                                    p_147424_3_[j3 += short1] = Blocks.water;
                                }
                                else
                                {
                                    p_147424_3_[j3 += short1] = null;
                                }
                            }

                            d10 += d12;
                            d11 += d13;
                        }

                        d1 += d5;
                        d2 += d6;
                        d3 += d7;
                        d4 += d8;
                    }
                }
            }
        }
    }

    public void replaceBlocksForBiome(int p_147422_1_, int p_147422_2_, Block[] p_147422_3_, byte[] p_147422_4_, BiomeGenBase[] p_147422_5_)
    {
        ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, p_147422_1_, p_147422_2_, p_147422_3_, p_147422_5_);
        MinecraftForge.EVENT_BUS.post(event);
        if (event.getResult() == Result.DENY) return;

        double d0 = 0.03125D;
        this.stoneNoise = this.field_147430_m.func_151599_a(this.stoneNoise, (double)(p_147422_1_ * 16), (double)(p_147422_2_ * 16), 16, 16, d0 * 2.0D, d0 * 2.0D, 1.0D);

        for (int k = 0; k < 16; ++k)
        {
            for (int l = 0; l < 16; ++l)
            {
                BiomeGenBase biomegenbase = p_147422_5_[l + k * 16];
                biomegenbase.genTerrainBlocks(this.worldObj, this.rand, p_147422_3_, p_147422_4_, p_147422_1_ * 16 + k, p_147422_2_ * 16 + l, this.stoneNoise[l + k * 16]);
            }
        }
    }

    /**
     * loads or generates the chunk at the chunk location specified
     */
    public Chunk loadChunk(int par1, int par2)
    {
        return this.provideChunk(par1, par2);
    }

    /**
     * Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
     * specified chunk from the map seed and chunk seed
     */
    public Chunk provideChunk(int par1, int par2)
    {
        this.rand.setSeed((long)par1 * 341873128712L + (long)par2 * 132897987541L);
        Block[] ablock = new Block[65536];
        byte[] abyte = new byte[65536];
        this.func_147424_a(par1, par2, ablock);
        this.biomesForGeneration = this.worldObj.getWorldChunkManager().loadBlockGeneratorData(this.biomesForGeneration, par1 * 16, par2 * 16, 16, 16);
        this.replaceBlocksForBiome(par1, par2, ablock, abyte, this.biomesForGeneration);
        this.caveGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
        this.ravineGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);

        if (this.mapFeaturesEnabled)
        {
            this.mineshaftGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
            this.villageGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
            this.strongholdGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
            this.scatteredFeatureGenerator.func_151539_a(this, this.worldObj, par1, par2, ablock);
        }

        Chunk chunk = new Chunk(this.worldObj, ablock, abyte, par1, par2);
        byte[] abyte1 = chunk.getBiomeArray();

        for (int k = 0; k < abyte1.length; ++k)
        {
            abyte1[k] = (byte)this.biomesForGeneration[k].biomeID;
        }

        chunk.generateSkylightMap();
        return chunk;
    }

    private void func_147423_a(int p_147423_1_, int p_147423_2_, int p_147423_3_)
    {
        double d0 = 684.412D;
        double d1 = 684.412D;
        double d2 = 512.0D;
        double d3 = 512.0D;
        this.field_147426_g = this.noiseGen6.generateNoiseOctaves(this.field_147426_g, p_147423_1_, p_147423_3_, 5, 5, 200.0D, 200.0D, 0.5D);
        this.field_147427_d = this.field_147429_l.generateNoiseOctaves(this.field_147427_d, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 8.555150000000001D, 4.277575000000001D, 8.555150000000001D);
        this.field_147428_e = this.field_147431_j.generateNoiseOctaves(this.field_147428_e, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 684.412D, 684.412D, 684.412D);
        this.field_147425_f = this.field_147432_k.generateNoiseOctaves(this.field_147425_f, p_147423_1_, p_147423_2_, p_147423_3_, 5, 33, 5, 684.412D, 684.412D, 684.412D);
        boolean flag1 = false;
        boolean flag = false;
        int l = 0;
        int i1 = 0;
        double d4 = 8.5D;

        for (int j1 = 0; j1 < 5; ++j1)
        {
            for (int k1 = 0; k1 < 5; ++k1)
            {
                float f = 0.0F;
                float f1 = 0.0F;
                float f2 = 0.0F;
                byte b0 = 2;
                BiomeGenBase biomegenbase = this.biomesForGeneration[j1 + 2 + (k1 + 2) * 10];

                for (int l1 = -b0; l1 <= b0; ++l1)
                {
                    for (int i2 = -b0; i2 <= b0; ++i2)
                    {
                        BiomeGenBase biomegenbase1 = this.biomesForGeneration[j1 + l1 + 2 + (k1 + i2 + 2) * 10];
                        float f3 = biomegenbase1.rootHeight;
                        float f4 = biomegenbase1.heightVariation;

                        if (this.field_147435_p == WorldType.AMPLIFIED && f3 > 0.0F)
                        {
                            f3 = 1.0F + f3 * 2.0F;
                            f4 = 1.0F + f4 * 4.0F;
                        }

                        float f5 = this.parabolicField[l1 + 2 + (i2 + 2) * 5] / (f3 + 2.0F);

                        if (biomegenbase1.rootHeight > biomegenbase.rootHeight)
                        {
                            f5 /= 2.0F;
                        }

                        f += f4 * f5;
                        f1 += f3 * f5;
                        f2 += f5;
                    }
                }

                f /= f2;
                f1 /= f2;
                f = f * 0.9F + 0.1F;
                f1 = (f1 * 4.0F - 1.0F) / 8.0F;
                double d13 = this.field_147426_g[i1] / 8000.0D;

                if (d13 < 0.0D)
                {
                    d13 = -d13 * 0.3D;
                }

                d13 = d13 * 3.0D - 2.0D;

                if (d13 < 0.0D)
                {
                    d13 /= 2.0D;

                    if (d13 < -1.0D)
                    {
                        d13 = -1.0D;
                    }

                    d13 /= 1.4D;
                    d13 /= 2.0D;
                }
                else
                {
                    if (d13 > 1.0D)
                    {
                        d13 = 1.0D;
                    }

                    d13 /= 8.0D;
                }

                ++i1;
                double d12 = (double)f1;
                double d14 = (double)f;
                d12 += d13 * 0.2D;
                d12 = d12 * 8.5D / 8.0D;
                double d5 = 8.5D + d12 * 4.0D;

                for (int j2 = 0; j2 < 33; ++j2)
                {
                    double d6 = ((double)j2 - d5) * 12.0D * 128.0D / 256.0D / d14;

                    if (d6 < 0.0D)
                    {
                        d6 *= 4.0D;
                    }

                    double d7 = this.field_147428_e[l] / 512.0D;
                    double d8 = this.field_147425_f[l] / 512.0D;
                    double d9 = (this.field_147427_d[l] / 10.0D + 1.0D) / 2.0D;
                    double d10 = MathHelper.denormalizeClamp(d7, d8, d9) - d6;

                    if (j2 > 29)
                    {
                        double d11 = (double)((float)(j2 - 29) / 3.0F);
                        d10 = d10 * (1.0D - d11) + -10.0D * d11;
                    }

                    this.field_147434_q[l] = d10;
                    ++l;
                }
            }
        }
    }

    /**
     * Checks to see if a chunk exists at x, y
     */
    public boolean chunkExists(int par1, int par2)
    {
        return true;
    }

    /**
     * Populates chunk with ores etc etc
     */
    public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
    {
        BlockFalling.fallInstantly = true;
        int k = par2 * 16;
        int l = par3 * 16;
        BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(k + 16, l + 16);
        this.rand.setSeed(this.worldObj.getSeed());
        long i1 = this.rand.nextLong() / 2L * 2L + 1L;
        long j1 = this.rand.nextLong() / 2L * 2L + 1L;
        this.rand.setSeed((long)par2 * i1 + (long)par3 * j1 ^ this.worldObj.getSeed());
        boolean flag = false;

        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, worldObj, rand, par2, par3, flag));

        if (this.mapFeaturesEnabled)
        {
            this.mineshaftGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
            flag = this.villageGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
            this.strongholdGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
            this.scatteredFeatureGenerator.generateStructuresInChunk(this.worldObj, this.rand, par2, par3);
        }

        int k1;
        int l1;
        int i2;

        if (biomegenbase != BiomeGenBase.desert && biomegenbase != BiomeGenBase.desertHills && !flag && this.rand.nextInt(4) == 0
            && TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, LAKE))
        {
            k1 = k + this.rand.nextInt(16) + 8;
            l1 = this.rand.nextInt(256);
            i2 = l + this.rand.nextInt(16) + 8;
            (new WorldGenLakes(Blocks.water)).generate(this.worldObj, this.rand, k1, l1, i2);
        }

        if (TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, LAVA) && !flag && this.rand.nextInt( == 0)
        {
            k1 = k + this.rand.nextInt(16) + 8;
            l1 = this.rand.nextInt(this.rand.nextInt(248) + ;
            i2 = l + this.rand.nextInt(16) + 8;

            if (l1 < 63 || this.rand.nextInt(10) == 0)
            {
                (new WorldGenLakes(Blocks.lava)).generate(this.worldObj, this.rand, k1, l1, i2);
            }
        }

        boolean doGen = TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, DUNGEON);
        for (k1 = 0; doGen && k1 < 8; ++k1)
        {
            l1 = k + this.rand.nextInt(16) + 8;
            i2 = this.rand.nextInt(256);
            int j2 = l + this.rand.nextInt(16) + 8;
            (new WorldGenDungeons()).generate(this.worldObj, this.rand, l1, i2, j2);
        }

        biomegenbase.decorate(this.worldObj, this.rand, k, l);
        SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);
        k += 8;
        l += 8;

        doGen = TerrainGen.populate(par1IChunkProvider, worldObj, rand, par2, par3, flag, ICE);
        for (k1 = 0; doGen && k1 < 16; ++k1)
        {
            for (l1 = 0; l1 < 16; ++l1)
            {
                i2 = this.worldObj.getPrecipitationHeight(k + k1, l + l1);

                if (this.worldObj.isBlockFreezable(k1 + k, i2 - 1, l1 + l))
                {
                    this.worldObj.setBlock(k1 + k, i2 - 1, l1 + l, Blocks.ice, 0, 2);
                }

                if (this.worldObj.func_147478_e(k1 + k, i2, l1 + l, true))
                {
                    this.worldObj.setBlock(k1 + k, i2, l1 + l, Blocks.snow_layer, 0, 2);
                }
            }
        }

        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, worldObj, rand, par2, par3, flag));

        BlockFalling.fallInstantly = false;
    }

    /**
     * Two modes of operation: if passed true, save all Chunks in one go.  If passed false, save up to two chunks.
     * Return true if all chunks have been saved.
     */
    public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
    {
        return true;
    }

    /**
     * Save extra data not associated with any Chunk.  Not saved during autosave, only during world unload.  Currently
     * unimplemented.
     */
    public void saveExtraData() {}

    /**
     * Unloads chunks that are marked to be unloaded. This is not guaranteed to unload every such chunk.
     */
    public boolean unloadQueuedChunks()
    {
        return false;
    }

    /**
     * Returns if the IChunkProvider supports saving.
     */
    public boolean canSave()
    {
        return true;
    }

    /**
     * Converts the instance data to a readable string.
     */
    public String makeString()
    {
        return "RandomLevelSource";
    }

    /**
     * Returns a list of creatures of the specified type that can spawn at the given location.
     */
    public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
    {
        BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(par2, par4);
        return par1EnumCreatureType == EnumCreatureType.monster && this.scatteredFeatureGenerator.func_143030_a(par2, par3, par4) ? this.scatteredFeatureGenerator.getScatteredFeatureSpawnList() : biomegenbase.getSpawnableList(par1EnumCreatureType);
    }

    public ChunkPosition func_147416_a(World p_147416_1_, String p_147416_2_, int p_147416_3_, int p_147416_4_, int p_147416_5_)
    {
        return "Stronghold".equals(p_147416_2_) && this.strongholdGenerator != null ? this.strongholdGenerator.func_151545_a(p_147416_1_, p_147416_3_, p_147416_4_, p_147416_5_) : null;
    }

    public int getLoadedChunkCount()
    {
        return 0;
    }

    public void recreateStructures(int par1, int par2)
    {
        if (this.mapFeaturesEnabled)
        {
            this.mineshaftGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
            this.villageGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
            this.strongholdGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
            this.scatteredFeatureGenerator.func_151539_a(this, this.worldObj, par1, par2, (Block[])null);
        }
    }
}

 

 

WorldChunkManagerSky.java

 

 

package examplemod;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

import net.minecraft.crash.CrashReport;
import net.minecraft.crash.CrashReportCategory;
import net.minecraft.util.ReportedException;
import net.minecraft.world.ChunkPosition;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.biome.BiomeCache;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.biome.WorldChunkManager;
import net.minecraft.world.gen.layer.GenLayer;
import net.minecraft.world.gen.layer.IntCache;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.terraingen.WorldTypeEvent;
import static net.minecraft.world.biome.BiomeGenBase.*;


public class WorldChunkManagerSky extends WorldChunkManager
{
    public static ArrayList<BiomeGenBase> allowedBiomes = new ArrayList<BiomeGenBase>(Arrays.asList(desert));
    private GenLayer genBiomes;
    /**
     * A GenLayer containing the indices into BiomeGenBase.biomeList[]
     */
    private GenLayer biomeIndexLayer;
    /**
     * The BiomeCache object for this world.
     */
    private BiomeCache biomeCache;
    /**
     * A list of biomes that the player can spawn in.
     */
    private List biomesToSpawnIn;
    private static final String __OBFID = "CL_00000166";

    protected WorldChunkManagerSky()
    {
        this.biomeCache = new BiomeCache(this);
        this.biomesToSpawnIn = new ArrayList();
        this.biomesToSpawnIn.addAll(allowedBiomes);
    }

    public WorldChunkManagerSky(long par1, WorldType par3WorldType)
    {
        this();
        GenLayer[] agenlayer = GenLayer.initializeAllBiomeGenerators(par1, par3WorldType);
        agenlayer = getModdedBiomeGenerators(par3WorldType, par1, agenlayer);
        this.genBiomes = agenlayer[0];
        this.biomeIndexLayer = agenlayer[1];
    }

    public WorldChunkManagerSky(World par1World)
    {
        this(par1World.getSeed(), par1World.getWorldInfo().getTerrainType());
    }

    /**
     * Gets the list of valid biomes for the player to spawn in.
     */
    public List getBiomesToSpawnIn()
    {
        return this.biomesToSpawnIn;
    }

    /**
     * Returns the BiomeGenBase related to the x, z position on the world.
     */
    public BiomeGenBase getBiomeGenAt(int par1, int par2)
    {
        return this.biomeCache.getBiomeGenAt(par1, par2);
    }

    /**
     * Returns a list of rainfall values for the specified blocks. Args: listToReuse, x, z, width, length.
     */
    public float[] getRainfall(float[] par1ArrayOfFloat, int par2, int par3, int par4, int par5)
    {
        IntCache.resetIntCache();

        if (par1ArrayOfFloat == null || par1ArrayOfFloat.length < par4 * par5)
        {
            par1ArrayOfFloat = new float[par4 * par5];
        }

        int[] aint = this.biomeIndexLayer.getInts(par2, par3, par4, par5);

        for (int i1 = 0; i1 < par4 * par5; ++i1)
        {
            try
            {
                float f = (float)BiomeGenBase.getBiome(aint[i1]).getIntRainfall() / 65536.0F;

                if (f > 1.0F)
                {
                    f = 1.0F;
                }

                par1ArrayOfFloat[i1] = f;
            }
            catch (Throwable throwable)
            {
                CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
                CrashReportCategory crashreportcategory = crashreport.makeCategory("DownfallBlock");
                crashreportcategory.addCrashSection("biome id", Integer.valueOf(i1));
                crashreportcategory.addCrashSection("downfalls[] size", Integer.valueOf(par1ArrayOfFloat.length));
                crashreportcategory.addCrashSection("x", Integer.valueOf(par2));
                crashreportcategory.addCrashSection("z", Integer.valueOf(par3));
                crashreportcategory.addCrashSection("w", Integer.valueOf(par4));
                crashreportcategory.addCrashSection("h", Integer.valueOf(par5));
                throw new ReportedException(crashreport);
            }
        }

        return par1ArrayOfFloat;
    }

    /**
     * Return an adjusted version of a given temperature based on the y height
     */
    @SideOnly(Side.CLIENT)
    public float getTemperatureAtHeight(float par1, int par2)
    {
        return par1;
    }

    /**
     * Returns an array of biomes for the location input.
     */
    public BiomeGenBase[] getBiomesForGeneration(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
    {
        IntCache.resetIntCache();

        if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
        {
            par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
        }

        int[] aint = this.genBiomes.getInts(par2, par3, par4, par5);

        try
        {
            for (int i1 = 0; i1 < par4 * par5; ++i1)
            {
                par1ArrayOfBiomeGenBase[i1] = BiomeGenBase.getBiome(aint[i1]);
            }

            return par1ArrayOfBiomeGenBase;
        }
        catch (Throwable throwable)
        {
            CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
            CrashReportCategory crashreportcategory = crashreport.makeCategory("RawBiomeBlock");
            crashreportcategory.addCrashSection("biomes[] size", Integer.valueOf(par1ArrayOfBiomeGenBase.length));
            crashreportcategory.addCrashSection("x", Integer.valueOf(par2));
            crashreportcategory.addCrashSection("z", Integer.valueOf(par3));
            crashreportcategory.addCrashSection("w", Integer.valueOf(par4));
            crashreportcategory.addCrashSection("h", Integer.valueOf(par5));
            throw new ReportedException(crashreport);
        }
    }

    /**
     * Returns biomes to use for the blocks and loads the other data like temperature and humidity onto the
     * WorldChunkManager Args: oldBiomeList, x, z, width, depth
     */
    public BiomeGenBase[] loadBlockGeneratorData(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
    {
        return this.getBiomeGenAt(par1ArrayOfBiomeGenBase, par2, par3, par4, par5, true);
    }

    /**
     * Return a list of biomes for the specified blocks. Args: listToReuse, x, y, width, length, cacheFlag (if false,
     * don't check biomeCache to avoid infinite loop in BiomeCacheBlock)
     */
    public BiomeGenBase[] getBiomeGenAt(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5, boolean par6)
    {
        IntCache.resetIntCache();

        if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
        {
            par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
        }

        if (par6 && par4 == 16 && par5 == 16 && (par2 & 15) == 0 && (par3 & 15) == 0)
        {
            BiomeGenBase[] abiomegenbase1 = this.biomeCache.getCachedBiomes(par2, par3);
            System.arraycopy(abiomegenbase1, 0, par1ArrayOfBiomeGenBase, 0, par4 * par5);
            return par1ArrayOfBiomeGenBase;
        }
        else
        {
            int[] aint = this.biomeIndexLayer.getInts(par2, par3, par4, par5);

            for (int i1 = 0; i1 < par4 * par5; ++i1)
            {
                par1ArrayOfBiomeGenBase[i1] = BiomeGenBase.getBiome(aint[i1]);
            }

            return par1ArrayOfBiomeGenBase;
        }
    }

    /**
     * checks given Chunk's Biomes against List of allowed ones
     */
    public boolean areBiomesViable(int par1, int par2, int par3, List par4List)
    {
        IntCache.resetIntCache();
        int l = par1 - par3 >> 2;
        int i1 = par2 - par3 >> 2;
        int j1 = par1 + par3 >> 2;
        int k1 = par2 + par3 >> 2;
        int l1 = j1 - l + 1;
        int i2 = k1 - i1 + 1;
        int[] aint = this.genBiomes.getInts(l, i1, l1, i2);

        try
        {
            for (int j2 = 0; j2 < l1 * i2; ++j2)
            {
                BiomeGenBase biomegenbase = BiomeGenBase.getBiome(aint[j2]);

                if (!par4List.contains(biomegenbase))
                {
                    return false;
                }
            }

            return true;
        }
        catch (Throwable throwable)
        {
            CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
            CrashReportCategory crashreportcategory = crashreport.makeCategory("Layer");
            crashreportcategory.addCrashSection("Layer", this.genBiomes.toString());
            crashreportcategory.addCrashSection("x", Integer.valueOf(par1));
            crashreportcategory.addCrashSection("z", Integer.valueOf(par2));
            crashreportcategory.addCrashSection("radius", Integer.valueOf(par3));
            crashreportcategory.addCrashSection("allowed", par4List);
            throw new ReportedException(crashreport);
        }
    }

    public ChunkPosition findBiomePosition(int p_150795_1_, int p_150795_2_, int p_150795_3_, List p_150795_4_, Random p_150795_5_)
    {
        IntCache.resetIntCache();
        int l = p_150795_1_ - p_150795_3_ >> 2;
        int i1 = p_150795_2_ - p_150795_3_ >> 2;
        int j1 = p_150795_1_ + p_150795_3_ >> 2;
        int k1 = p_150795_2_ + p_150795_3_ >> 2;
        int l1 = j1 - l + 1;
        int i2 = k1 - i1 + 1;
        int[] aint = this.genBiomes.getInts(l, i1, l1, i2);
        ChunkPosition chunkposition = null;
        int j2 = 0;

        for (int k2 = 0; k2 < l1 * i2; ++k2)
        {
            int l2 = l + k2 % l1 << 2;
            int i3 = i1 + k2 / l1 << 2;
            BiomeGenBase biomegenbase = BiomeGenBase.getBiome(aint[k2]);

            if (p_150795_4_.contains(biomegenbase) && (chunkposition == null || p_150795_5_.nextInt(j2 + 1) == 0))
            {
                chunkposition = new ChunkPosition(l2, 0, i3);
                ++j2;
            }
        }

        return chunkposition;
    }

    /**
     * Calls the WorldChunkManager's biomeCache.cleanupCache()
     */
    public void cleanupCache()
    {
        this.biomeCache.cleanupCache();
    }

    public GenLayer[] getModdedBiomeGenerators(WorldType worldType, long seed, GenLayer[] original)
    {
        WorldTypeEvent.InitBiomeGens event = new WorldTypeEvent.InitBiomeGens(worldType, seed, original);
        MinecraftForge.TERRAIN_GEN_BUS.post(event);
        return event.newBiomeGens;
    }
}

 

 

 

 

 

Everything is working except the biomes, is generating all biomes.

But I want only the desert, for example.

And sorry about my english, im brazilian xD

This tutorial on the minecraftfroums helped me a lot to understand how things work:

http://www.minecraftforum.net/topic/1797143-152-16-forge-dimension-tutorial-multi-biome-dimension-ore-gen-basic-house-gen-tree-gen-skyrenderer-githubsrc-code/page__st__280

I think that you have to scroll down a little bit, it should be post 3 or 4.

This actually is about adding a new dimension with multiple biomes but the principe should be the same

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