BiomesOPlenty/common/biomesoplenty/worldgen/structure/BOPMapGenVillage.java

package biomesoplenty.worldgen.structure;

import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Random;

import net.minecraft.util.MathHelper;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraft.world.gen.structure.MapGenStructure;
import net.minecraft.world.gen.structure.MapGenVillage;
import net.minecraft.world.gen.structure.StructureStart;
import biomesoplenty.configuration.configfile.BOPConfigurationTerrainGen;

public class BOPMapGenVillage extends MapGenStructure
{
	/** A list of all the biomes villages can spawn in. */
	public static List villageSpawnBiomes = Arrays.asList(new BiomeGenBase[] {BiomeGenBase.plains, BiomeGenBase.desert});

	/** World terrain type, 0 for normal, 1 for flat map */
	private int terrainType;
	private int maxDistance;
	private int minDistance;

	public BOPMapGenVillage()
	{
		terrainType = 0;
		maxDistance = BOPConfigurationTerrainGen.villageDistance;
		minDistance = BOPConfigurationTerrainGen.villageDistance / 4;
		villageSpawnBiomes = MapGenVillage.villageSpawnBiomes;
	}

	public BOPMapGenVillage(Map par1Map)
	{
		this();
		Iterator iterator = par1Map.entrySet().iterator();

		while (iterator.hasNext())
		{
			Entry entry = (Entry)iterator.next();

			if (((String)entry.getKey()).equals("size"))
			{
				terrainType = MathHelper.parseIntWithDefaultAndMax((String)entry.getValue(), terrainType, 0);
			}
			else if (((String)entry.getKey()).equals("distance"))
			{
				maxDistance = MathHelper.parseIntWithDefaultAndMax((String)entry.getValue(), maxDistance, minDistance + 1);
			}
		}
	}
	
	@Override
    public String func_143025_a()
    {
        return "Village";
    }

	@Override
	protected boolean canSpawnStructureAtCoords(int par1, int par2)
	{
		int k = par1;
		int l = par2;

		if (par1 < 0)
		{
			par1 -= maxDistance - 1;
		}

		if (par2 < 0)
		{
			par2 -= maxDistance - 1;
		}

		int i1 = par1 / maxDistance;
		int j1 = par2 / maxDistance;
		Random random = worldObj.setRandomSeed(i1, j1, 10387312);
		i1 *= maxDistance;
		j1 *= maxDistance;
		i1 += random.nextInt(maxDistance - minDistance);
		j1 += random.nextInt(maxDistance - minDistance);

		if (k == i1 && l == j1)
		{
			boolean flag = worldObj.getWorldChunkManager().areBiomesViable(k * 16 + 8, l * 16 + 8, 0, villageSpawnBiomes);

			if (flag)
				return true;
		}

		return false;
	}

	@Override
	protected StructureStart getStructureStart(int par1, int par2)
	{
		return new BOPStructureVillageStart(worldObj, rand, par1, par2, terrainType);
	}
}