GenLayerZoom.java

package net.minecraft.world.gen.layer;

public class GenLayerZoom extends GenLayer
{
    private static final String __OBFID = "CL_00000572";

    public GenLayerZoom(long p_i2134_1_, GenLayer p_i2134_3_)
    {
        super(p_i2134_1_);
        super.parent = p_i2134_3_;
    }

    /**
     * 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.
     */
    public int[] getInts(int areaX, int areaY, int areaWidth, int areaHeight)
    {
        int var5 = areaX >> 1;
        int var6 = areaY >> 1;
        int var7 = (areaWidth >> 1) + 2;
        int var8 = (areaHeight >> 1) + 2;
        int[] var9 = this.parent.getInts(var5, var6, var7, var8);
        int var10 = var7 - 1 << 1;
        int var11 = var8 - 1 << 1;
        int[] var12 = IntCache.getIntCache(var10 * var11);
        int var14;

        for (int var13 = 0; var13 < var8 - 1; ++var13)
        {
            var14 = (var13 << 1) * var10;
            int var15 = 0;
            int var16 = var9[var15 + 0 + (var13 + 0) * var7];

            for (int var17 = var9[var15 + 0 + (var13 + 1) * var7]; var15 < var7 - 1; ++var15)
            {
                this.initChunkSeed((long)(var15 + var5 << 1), (long)(var13 + var6 << 1));
                int var18 = var9[var15 + 1 + (var13 + 0) * var7];
                int var19 = var9[var15 + 1 + (var13 + 1) * var7];
                var12[var14] = var16;
                var12[var14++ + var10] = this.selectRandom(new int[] {var16, var17});
                var12[var14] = this.selectRandom(new int[] {var16, var18});
                var12[var14++ + var10] = this.selectModeOrRandom(var16, var18, var17, var19);
                var16 = var18;
                var17 = var19;
            }
        }

        int[] var20 = IntCache.getIntCache(areaWidth * areaHeight);

        for (var14 = 0; var14 < areaHeight; ++var14)
        {
            System.arraycopy(var12, (var14 + (areaY & 1)) * var10 + (areaX & 1), var20, var14 * areaWidth, areaWidth);
        }

        return var20;
    }

    /**
     * Magnify a layer. Parms are seed adjustment, layer, number of times to magnify
     */
    public static GenLayer magnify(long p_75915_0_, GenLayer p_75915_2_, int p_75915_3_)
    {
        Object var4 = p_75915_2_;

        for (int var5 = 0; var5 < p_75915_3_; ++var5)
        {
            var4 = new GenLayerZoom(p_75915_0_ + (long)var5, (GenLayer)var4);
        }

        return (GenLayer)var4;
    }
}