GenLayerRiverMix.java

package net.minecraft.world.gen.layer;

import net.minecraft.world.biome.BiomeGenBase;

public class GenLayerRiverMix extends GenLayer
{
    private GenLayer biomePatternGeneratorChain;
    private GenLayer riverPatternGeneratorChain;
    private static final String __OBFID = "CL_00000567";

    public GenLayerRiverMix(long p_i2129_1_, GenLayer p_i2129_3_, GenLayer p_i2129_4_)
    {
        super(p_i2129_1_);
        this.biomePatternGeneratorChain = p_i2129_3_;
        this.riverPatternGeneratorChain = p_i2129_4_;
    }

    /**
     * Initialize layer's local worldGenSeed based on its own baseSeed and the world's global seed (passed in as an
     * argument).
     */
    public void initWorldGenSeed(long p_75905_1_)
    {
        this.biomePatternGeneratorChain.initWorldGenSeed(p_75905_1_);
        this.riverPatternGeneratorChain.initWorldGenSeed(p_75905_1_);
        super.initWorldGenSeed(p_75905_1_);
    }

    /**
     * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
     * amounts, or biomeList[] indices based on the particular GenLayer subclass.
     *  
     * @param areaX The x-position of the area
     * @param areaY The y-position of the area
     * @param areaWidth The width of the area
     * @param areaHeight The height of the area
     */
    public int[] getInts(int areaX, int areaY, int areaWidth, int areaHeight)
    {
        int[] aint = this.biomePatternGeneratorChain.getInts(areaX, areaY, areaWidth, areaHeight);
        int[] aint1 = this.riverPatternGeneratorChain.getInts(areaX, areaY, areaWidth, areaHeight);
        int[] aint2 = IntCache.getIntCache(areaWidth * areaHeight);

        for (int i1 = 0; i1 < areaWidth * areaHeight; ++i1)
        {
            if (aint[i1] != BiomeGenBase.ocean.biomeID && aint[i1] != BiomeGenBase.deepOcean.biomeID)
            {
                if (aint1[i1] == BiomeGenBase.river.biomeID)
                {
                    if (aint[i1] == BiomeGenBase.icePlains.biomeID)
                    {
                        aint2[i1] = BiomeGenBase.frozenRiver.biomeID;
                    }
                    else if (aint[i1] != BiomeGenBase.mushroomIsland.biomeID && aint[i1] != BiomeGenBase.mushroomIslandShore.biomeID)
                    {
                        aint2[i1] = aint1[i1] & 255;
                    }
                    else
                    {
                        aint2[i1] = BiomeGenBase.mushroomIslandShore.biomeID;
                    }
                }
                else
                {
                    aint2[i1] = aint[i1];
                }
            }
            else
            {
                aint2[i1] = aint[i1];
            }
        }

        return aint2;
    }
}