import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;


public class MCObjWriter
{
    private ArrayList<blockinfo> set = new ArrayList<blockinfo>();
    private static int count=0;

    public void add(int x, int y, int z, int id)
    {
        blockinfo temp = new blockinfo();
        temp.x = x;
        temp.y = y;
        temp.z = z;
        temp.id = id;
        set.add(temp);
    }

    private class blockinfo
    {
        public int x, y, z;
        int id;
    }

    public void write(File f) throws IOException
    {
        FileWriter fw = new FileWriter(f);

        for(blockinfo b : set)
        {
            fw.append("g blocktype"+b.id+"\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y + .5) + " " + b.z + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y - .5) + " " + b.z + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y - .5) + " " + b.z + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y + .5) + " " + b.z + "\n");
            fw.append("f " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + "\n");

            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y + .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y - .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y - .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y + .5) + " " + (b.z+1) + "\n");
            fw.append("f " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + "\n");

            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y + .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y - .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y - .5) + " " + (b.z) + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y + .5) + " " + (b.z) + "\n");
            fw.append("f " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + "\n");

            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y + .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y - .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y - .5) + " " + (b.z) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y + .5) + " " + (b.z) + "\n");
            fw.append("f " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + "\n");

            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y + .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y + .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y + .5) + " " + (b.z) + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y + .5) + " " + (b.z) + "\n");
            fw.append("f " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + "\n");

            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y - .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y - .5) + " " + (b.z+1) + "\n");
            fw.append("v " + ((double)b.x - .5) + " " + ((double)b.y - .5) + " " + (b.z) + "\n");
            fw.append("v " + ((double)b.x + .5) + " " + ((double)b.y - .5) + " " + (b.z) + "\n");
            fw.append("f " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + ++count + "/" + count + " " + "\n");

            if(count%24000 == 0)
                System.out.println( count + " faces written" );

        }
        fw.close();
    }
}