Turtle V1.1

local SLOT_COUNT = 16
local d = "north"
local width, depth, height = 10, 10, 2

arg = {...}

if (select('#', arg) == 3) then
    width = tonumber(arg[1])
    depth = tonumber(arg[2])
    height = tonumber(arg[3])
else
    print('None or Malformed Size Given, Defaulting to 10x10x2 up')
end

IGNORE_ITEMS = {
  "minecraft:stone",
  "minecraft:cobblestone",
  "minecraft:sand",
  "minecraft:gravel",
  "minecraft:flint",
  "minecraft:dirt",
  "rustic:slate",
  "quark:jasper",
  "chisel:limestone2",
  "chisel:marble2",
}

function dropItems()
  print("Purging inventory...")
  for slot=1, SLOT_COUNT, 1 do
    local item = turtle.getItemDetail(slot)
    if(item ~= nil) then
      for filterIndex = 1, #IGNORE_ITEMS, 1 do
        if(item["name"] == IGNORE_ITEMS[filterIndex]) then
          print("Dropping - " .. item["name"])
          turtle.select(slot)
          turtle.dropDown()
        end
      end
    end
  end
end

function manageInventory()
  dropItems()
end

function checkFuel()
    turtle.select(1)

    if(turtle.getFuelLevel() < 50) then
        print("Attempting Refuel...")
        for slot = 1, SLOT_COUNT, 1 do
            turtle.select(slot)
            if(turtle.refuel(1)) then
                return true
            end
        end

        return false
    else
        return true
    end
end


function detectAndDig()
    while(turtle.detect() or turtle.detectUp() or turtle.detectDown()) do
        turtle.dig()
        turtle.digUp()
        turtle.digDown()
    end
end

function forward()
    detectAndDig()
    turtle.forward()
end

function leftTurn()
    turtle.turnLeft()
    detectAndDig()
    turtle.forward()
    turtle.turnLeft()
    detectAndDig()
end


function rightTurn()
    turtle.turnRight()
    detectAndDig()
    turtle.forward()
    turtle.turnRight()
    detectAndDig()
end

function flipDirection()
    if(d == "north") then
        d = "south"
    elseif(d == "south") then
        d = "north"
    elseif(d == "west") then
        d = "east"
    elseif(d == "east") then
        d = "west"
    end

end

function turnAround(tier)
    if(tier % 2 == 1) then
        if(d == "north" or d == "east") then
            rightTurn()
        elseif(d == "south" or d == "west") then
            leftTurn()
        end
    else
        if(d == "north" or d == "east") then
            leftTurn()
        elseif(d == "south" or d == "west") then
            rightTurn()
        end
    end
    flipDirection()
end


function riseTier()
    turtle.turnRight()
    turtle.turnRight()
    flipDirection()
    turtle.digUp()
    turtle.up()
    turtle.digUp()
    turtle.up()
    turtle.digUp()
    turtle.up()
end


function start()
    for tier = 1, height, 1 do
        for col = 1, width, 1 do
            for row = 1, depth - 1, 1 do
                if(not checkFuel()) then
                    print("Turtle is out of fuel, Powering Down...")
                    return
                end
                forward()
                print(string.format("Row: %d   Col: %d", row, col))
            end
            if(col ~= width) then
                turnAround(tier)
            end
            manageInventory()
        end
        riseTier()
    end
end

start()