package net.minecraft.world.gen.layer;
public class GenLayerZoom extends GenLayer
{
public GenLayerZoom(long par1, GenLayer par3GenLayer)
{
super(par1);
super.parent = par3GenLayer;
}
/**
* 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 par1, int par2, int par3, int par4)
{
int var5 = par1 >> 1;
int var6 = par2 >> 1;
int var7 = (par3 >> 1) + 3;
int var8 = (par4 >> 1) + 3;
int[] var9 = this.parent.getInts(var5, var6, var7, var8);
int[] var10 = IntCache.getIntCache(var7 * 2 * var8 * 2);
int var11 = var7 << 1;
int var13;
for (int var12 = 0; var12 < var8 - 1; ++var12)
{
var13 = var12 << 1;
int var14 = var13 * var11;
int var15 = var9[0 + (var12 + 0) * var7];
int var16 = var9[0 + (var12 + 1) * var7];
for (int var17 = 0; var17 < var7 - 1; ++var17)
{
this.initChunkSeed((long)(var17 + var5 << 1), (long)(var12 + var6 << 1));
int var18 = var9[var17 + 1 + (var12 + 0) * var7];
int var19 = var9[var17 + 1 + (var12 + 1) * var7];
var10[var14] = var15;
var10[var14++ + var11] = this.choose(var15, var16);
var10[var14] = this.choose(var15, var18);
var10[var14++ + var11] = this.modeOrRandom(var15, var18, var16, var19);
var15 = var18;
var16 = var19;
}
}
int[] var20 = IntCache.getIntCache(par3 * par4);
for (var13 = 0; var13 < par4; ++var13)
{
System.arraycopy(var10, (var13 + (par2 & 1)) * (var7 << 1) + (par1 & 1), var20, var13 * par3, par3);
}
return var20;
}
/**
* Chooses one of the two inputs randomly.
*/
protected int choose(int par1, int par2)
{
return this.nextInt(2) == 0 ? par1 : par2;
}
/**
* returns the mode (most frequently occuring number) or a random number from the 4 integers provided
*/
protected int modeOrRandom(int par1, int par2, int par3, int par4)
{
if (par2 == par3 && par3 == par4)
{
return par2;
}
else if (par1 == par2 && par1 == par3)
{
return par1;
}
else if (par1 == par2 && par1 == par4)
{
return par1;
}
else if (par1 == par3 && par1 == par4)
{
return par1;
}
else if (par1 == par2 && par3 != par4)
{
return par1;
}
else if (par1 == par3 && par2 != par4)
{
return par1;
}
else if (par1 == par4 && par2 != par3)
{
return par1;
}
else if (par2 == par1 && par3 != par4)
{
return par2;
}
else if (par2 == par3 && par1 != par4)
{
return par2;
}
else if (par2 == par4 && par1 != par3)
{
return par2;
}
else if (par3 == par1 && par2 != par4)
{
return par3;
}
else if (par3 == par2 && par1 != par4)
{
return par3;
}
else if (par3 == par4 && par1 != par2)
{
return par3;
}
else if (par4 == par1 && par2 != par3)
{
return par3;
}
else if (par4 == par2 && par1 != par3)
{
return par3;
}
else if (par4 == par3 && par1 != par2)
{
return par3;
}
else
{
int var5 = this.nextInt(4);
return var5 == 0 ? par1 : (var5 == 1 ? par2 : (var5 == 2 ? par3 : par4));
}
}
public static GenLayer func_75915_a(long par0, GenLayer par2GenLayer, int par3)
{
Object var4 = par2GenLayer;
for (int var5 = 0; var5 < par3; ++var5)
{
var4 = new GenLayerZoom(par0 + (long)var5, (GenLayer)var4);
}
return (GenLayer)var4;
}
}