BiomesOPlenty/src/minecraft/tdwp_ftw/biomesop/worldgen/WorldGenColumn.java

package tdwp_ftw.biomesop.worldgen;

import java.util.Random;

import net.minecraft.world.World;
import net.minecraft.world.gen.feature.WorldGenerator;
import tdwp_ftw.biomesop.configuration.BOPBlocks;

public class WorldGenColumn extends WorldGenerator
{
    /**
     * The Block ID that the generator is allowed to replace while generating the terrain.
     */
    private int replaceID;

    public WorldGenColumn(int par1)
    {
        this.replaceID = par1;
    }

    public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
    {
        if (par1World.isAirBlock(par3, par4, par5) && par1World.getBlockId(par3, par4 - 1, par5) == this.replaceID)
        {
            int var6 = par2Random.nextInt(32) + 1;
            int var7 = par2Random.nextInt(2) + 1;
            int var8;
            int var9;
            int var10;
            int var11;

            for (var8 = par3 - var7; var8 <= par3 + var7; ++var8)
            {
                for (var9 = par5 - var7; var9 <= par5 + var7; ++var9)
                {
                    var10 = var8 - par3;
                    var11 = var9 - par5;

                    if (var10 * var10 + var11 * var11 <= var7 * var7 + 1 && par1World.getBlockId(var8, par4 - 1, var9) != this.replaceID)
                    {
                        return false;
                    }
                }
            }

            for (var8 = par4; var8 < par4 + var6 && var8 < 128; ++var8)
            {
                for (var9 = par3 - var7; var9 <= par3 + var7; ++var9)
                {
                    for (var10 = par5 - var7; var10 <= par5 + var7; ++var10)
                    {
                        var11 = var9 - par3;
                        int var12 = var10 - par5;

                        if (var11 * var11 + var12 * var12 <= var7 * var7 + 1)
                        {
                            par1World.setBlock(var9, var8, var10, BOPBlocks.ashStone.blockID);
                        }
                    }
                }
            }
            return true;
        }
        else
        {
            return false;
        }
    }
}