001    package net.minecraft.world.gen.layer;
002    
003    public class GenLayerZoom extends GenLayer
004    {
005        public GenLayerZoom(long par1, GenLayer par3GenLayer)
006        {
007            super(par1);
008            super.parent = par3GenLayer;
009        }
010    
011        /**
012         * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
013         * amounts, or biomeList[] indices based on the particular GenLayer subclass.
014         */
015        public int[] getInts(int par1, int par2, int par3, int par4)
016        {
017            int var5 = par1 >> 1;
018            int var6 = par2 >> 1;
019            int var7 = (par3 >> 1) + 3;
020            int var8 = (par4 >> 1) + 3;
021            int[] var9 = this.parent.getInts(var5, var6, var7, var8);
022            int[] var10 = IntCache.getIntCache(var7 * 2 * var8 * 2);
023            int var11 = var7 << 1;
024            int var13;
025    
026            for (int var12 = 0; var12 < var8 - 1; ++var12)
027            {
028                var13 = var12 << 1;
029                int var14 = var13 * var11;
030                int var15 = var9[0 + (var12 + 0) * var7];
031                int var16 = var9[0 + (var12 + 1) * var7];
032    
033                for (int var17 = 0; var17 < var7 - 1; ++var17)
034                {
035                    this.initChunkSeed((long)(var17 + var5 << 1), (long)(var12 + var6 << 1));
036                    int var18 = var9[var17 + 1 + (var12 + 0) * var7];
037                    int var19 = var9[var17 + 1 + (var12 + 1) * var7];
038                    var10[var14] = var15;
039                    var10[var14++ + var11] = this.choose(var15, var16);
040                    var10[var14] = this.choose(var15, var18);
041                    var10[var14++ + var11] = this.func_75916_b(var15, var18, var16, var19);
042                    var15 = var18;
043                    var16 = var19;
044                }
045            }
046    
047            int[] var20 = IntCache.getIntCache(par3 * par4);
048    
049            for (var13 = 0; var13 < par4; ++var13)
050            {
051                System.arraycopy(var10, (var13 + (par2 & 1)) * (var7 << 1) + (par1 & 1), var20, var13 * par3, par3);
052            }
053    
054            return var20;
055        }
056    
057        /**
058         * Chooses one of the two inputs randomly.
059         */
060        protected int choose(int par1, int par2)
061        {
062            return this.nextInt(2) == 0 ? par1 : par2;
063        }
064    
065        protected int func_75916_b(int par1, int par2, int par3, int par4)
066        {
067            if (par2 == par3 && par3 == par4)
068            {
069                return par2;
070            }
071            else if (par1 == par2 && par1 == par3)
072            {
073                return par1;
074            }
075            else if (par1 == par2 && par1 == par4)
076            {
077                return par1;
078            }
079            else if (par1 == par3 && par1 == par4)
080            {
081                return par1;
082            }
083            else if (par1 == par2 && par3 != par4)
084            {
085                return par1;
086            }
087            else if (par1 == par3 && par2 != par4)
088            {
089                return par1;
090            }
091            else if (par1 == par4 && par2 != par3)
092            {
093                return par1;
094            }
095            else if (par2 == par1 && par3 != par4)
096            {
097                return par2;
098            }
099            else if (par2 == par3 && par1 != par4)
100            {
101                return par2;
102            }
103            else if (par2 == par4 && par1 != par3)
104            {
105                return par2;
106            }
107            else if (par3 == par1 && par2 != par4)
108            {
109                return par3;
110            }
111            else if (par3 == par2 && par1 != par4)
112            {
113                return par3;
114            }
115            else if (par3 == par4 && par1 != par2)
116            {
117                return par3;
118            }
119            else if (par4 == par1 && par2 != par3)
120            {
121                return par3;
122            }
123            else if (par4 == par2 && par1 != par3)
124            {
125                return par3;
126            }
127            else if (par4 == par3 && par1 != par2)
128            {
129                return par3;
130            }
131            else
132            {
133                int var5 = this.nextInt(4);
134                return var5 == 0 ? par1 : (var5 == 1 ? par2 : (var5 == 2 ? par3 : par4));
135            }
136        }
137    
138        public static GenLayer func_75915_a(long par0, GenLayer par2GenLayer, int par3)
139        {
140            Object var4 = par2GenLayer;
141    
142            for (int var5 = 0; var5 < par3; ++var5)
143            {
144                var4 = new GenLayerZoom(par0 + (long)var5, (GenLayer)var4);
145            }
146    
147            return (GenLayer)var4;
148        }
149    }