quarry

function dumpIntoChest()
  turtle.select(16)
  turtle.placeUp()
  for i = 1, 15 do
    turtle.select(i)
    turtle.dropUp()
  end
  turtle.select(16)
  turtle.digUp()
  turtle.select(1)
end

function digStripe(length)
  for xDec = 1, length - 1 do
    if turtle.getItemCount(15) > 0 then
      dumpIntoChest()
    end
    turtle.digDown()
    turtle.forward()
  end
  turtle.digDown()
  turtle.turnRight()
  turtle.turnRight()
  for xDec = 1, length - 1 do
    turtle.forward()
  end
  turtle.turnRight()
  turtle.turnRight()
end

function digSquare(length, width)
  for yDec = 1, width -1 do
    digStripe(length)
    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()
  end
  digStripe(length)
  turtle.turnLeft()
  for yDec = 1, width - 1 do
    turtle.forward()
  end
  turtle.turnRight()
end

function digCube(length, width, height)
  for zDec = 1, height - 1 do
    digSquare(length, width)
    turtle.down()
  end
  digSquare(length, width)
  for zDec = 1, height - 1 do
    turtle.up()
  end
end
local arg = { ... }

if #arg == 3 then
  x = tonumber(arg[1])
  y = tonumber(arg[2])
  z = tonumber(arg[3])

  local fuel = turtle.getFuelLevel()
  if fuel == "unlimited" then
    fuel = 0
    fuelNeeded = -1
  else
    fuelNeeded = ((((x-1)*2)+1) * (y-1) * z + z - 1)
  end
  --print (x..y..z)

  print("Quarrying out area")
  print("Dimensions:")
  print("x: "..x)
  print("y: "..y)
  print("z: "..z)
  print("")
  print("Fuel: "..fuel)
  print("Fuel needed: "..fuelNeeded)
  print("")
  if fuel < fuelNeeded then
    print("Please refuel me! I need a minimum of "..fuelNeeded.." fuel!")
  else
    --Main quarry program

    digCube(x, y, z)

    if turtle.getFuelLevel() == "unlimited" then
      print("Unlimited fuel, fuel calculation disabled!")
    else
      fuelReallyNeeded = fuel - turtle.getFuelLevel()

      print("Fuel after quarrying: "..turtle.getFuelLevel())
      print("Fuel needed: "..fuelReallyNeeded)

      if fuelReallyNeeded == fuelNeeded then
        print("Fuel needed equals what I calculated!")
      else
        print("Aww shit. I calculated the wrong fuel usage! :-[")
        print("Creepers may kill me")
      end
    end
    dumpIntoChest()
  end
else
  print("Usage: quarry <length> <width> <height>")
  print("[stderr] Wrong parameters.")
end