ActuallyAdditions/src/main/java/ellpeck/actuallyadditions/gen/OreGen.java

package ellpeck.actuallyadditions.gen;

import cpw.mods.fml.common.IWorldGenerator;
import cpw.mods.fml.common.registry.GameRegistry;
import ellpeck.actuallyadditions.blocks.InitBlocks;
import ellpeck.actuallyadditions.blocks.metalists.TheMiscBlocks;
import ellpeck.actuallyadditions.config.ConfigValues;
import ellpeck.actuallyadditions.util.Util;
import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenMinable;
import org.apache.logging.log4j.Level;

import java.util.Random;

public class OreGen implements IWorldGenerator{

    @Override
    public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider){
        switch (world.provider.dimensionId){
            case -1:
                generateNether(world, random, chunkX*16, chunkZ*16);
            case 0:
                generateSurface(world, random, chunkX*16, chunkZ*16);
            case 1:
                generateEnd(world, random, chunkX*16, chunkZ*16);
        }
    }

    @SuppressWarnings("unused")
    private void generateEnd(World world, Random random, int x, int z){

    }

    private void generateSurface(World world, Random random, int x, int z){
        if(ConfigValues.generateBlackQuartz) this.addOreSpawn(InitBlocks.blockMisc, TheMiscBlocks.ORE_QUARTZ.ordinal(), Blocks.stone, world, random, x, z, this.getRandom(ConfigValues.blackQuartzBaseAmount, ConfigValues.blackQuartzAdditionalChance, random), ConfigValues.blackQuartzChance, ConfigValues.blackQuartzMinHeight, ConfigValues.blackQuartzMaxHeight);
    }

    @SuppressWarnings("unused")
    private void generateNether(World world, Random random, int x, int z){

    }

    public void addOreSpawn(Block block, int meta, Block blockIn, World world, Random random, int blockXPos, int blockZPos, int maxVeinSize, int chancesToSpawn, int minY, int maxY){
        if(maxY > minY){
            int yDiff = maxY - minY;
            for(int i = 0; i < chancesToSpawn; i++){
                int posX = blockXPos + random.nextInt(16);
                int posY = minY + random.nextInt(yDiff);
                int posZ = blockZPos + random.nextInt(16);
                new WorldGenMinable(block, meta, maxVeinSize, blockIn).generate(world, random, posX, posY, posZ);
            }
        }
        else Util.AA_LOGGER.log(Level.FATAL, "Couldn't generate '" + block.getUnlocalizedName() + "' into the world because the Min Y coordinate is bigger than the Max! This is definitely a Config Error! Check the Files!");
    }

    public int getRandom(int base, int extra, Random rand){
        return extra > 0 ? base+rand.nextInt(extra+1) : base;
    }

    public static void init(){
        Util.logInfo("Registering World Generator...");
        GameRegistry.registerWorldGenerator(new OreGen(), 0);
    }
}