BiomesOPlenty/src/minecraft/biomesoplenty/world/layer/BiomeLayer.java

package biomesoplenty.world.layer;

import net.minecraft.world.WorldType;
import net.minecraft.world.gen.layer.GenLayer;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.terraingen.WorldTypeEvent;

public abstract class BiomeLayer 
{
	private long worldGenSeed;
	protected BiomeLayer parent;
	private long chunkSeed;
	private long baseSeed;
	
    public static BiomeLayer[] initializeAllBiomeGenerators(long seed, WorldType worldtype)
    {
    	BiomeLayer obj = new BiomeLayerCreate(1L);
    	
    	for(int i = 0; i < 3; i++)
    	{
    		obj = new BiomeLayerZoom(2000L + i, (BiomeLayer)(obj));
    	}
    	
    	BiomeLayer obj2 = obj;
    	obj2 = new BiomeLayerZoom(1000L, (BiomeLayer)(obj2));
    	obj2 = new BiomeLayerBiomes(200L, ((BiomeLayer)(obj2)), worldtype);
    	
    	BiomeLayerVoronoiZoom genlayervoronoizoom = new BiomeLayerVoronoiZoom(10L, ((BiomeLayer)(obj2)));
		((BiomeLayer)(obj2)).initWorldGenSeed(seed);
		genlayervoronoizoom.initWorldGenSeed(seed);
    	
		return (new BiomeLayer[] { obj2, genlayervoronoizoom });	
    }
    
    public BiomeLayer(long seed)
    {
        this.baseSeed = seed;
        this.baseSeed *= this.baseSeed * 6364136223846793005L + 1442695040888963407L;
        this.baseSeed += seed;
        this.baseSeed *= this.baseSeed * 6364136223846793005L + 1442695040888963407L;
        this.baseSeed += seed;
        this.baseSeed *= this.baseSeed * 6364136223846793005L + 1442695040888963407L;
        this.baseSeed += seed;
    }
    
    public void initWorldGenSeed(long seed)
    {
        this.worldGenSeed = seed;

        if (this.parent != null)
        {
            this.parent.initWorldGenSeed(seed);
        }

        this.worldGenSeed *= this.worldGenSeed * 6364136223846793005L + 1442695040888963407L;
        this.worldGenSeed += this.baseSeed;
        this.worldGenSeed *= this.worldGenSeed * 6364136223846793005L + 1442695040888963407L;
        this.worldGenSeed += this.baseSeed;
        this.worldGenSeed *= this.worldGenSeed * 6364136223846793005L + 1442695040888963407L;
        this.worldGenSeed += this.baseSeed;
    }
    
    public void initChunkSeed(long par1, long par3)
    {
        this.chunkSeed = this.worldGenSeed;
        this.chunkSeed *= this.chunkSeed * 6364136223846793005L + 1442695040888963407L;
        this.chunkSeed += par1;
        this.chunkSeed *= this.chunkSeed * 6364136223846793005L + 1442695040888963407L;
        this.chunkSeed += par3;
        this.chunkSeed *= this.chunkSeed * 6364136223846793005L + 1442695040888963407L;
        this.chunkSeed += par1;
        this.chunkSeed *= this.chunkSeed * 6364136223846793005L + 1442695040888963407L;
        this.chunkSeed += par3;
    }
    
    protected int nextInt(int par1)
    {
        int j = (int)((this.chunkSeed >> 24) % (long)par1);

        if (j < 0)
        {
            j += par1;
        }

        this.chunkSeed *= this.chunkSeed * 6364136223846793005L + 1442695040888963407L;
        this.chunkSeed += this.worldGenSeed;
        return j;
    }
    
    public abstract int[] getInts(int i, int j, int k, int l);

    public static byte getModdedBiomeSize(WorldType worldType, byte original)
    {
        WorldTypeEvent.BiomeSize event = new WorldTypeEvent.BiomeSize(worldType, original);
        MinecraftForge.TERRAIN_GEN_BUS.post(event);
        return event.newSize;
    }
}