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 }