stickydig.lua

-- Take and parse arguments
local arg1, arg2, arg3, arg4 = ...
local width = tonumber(arg1)
local height = tonumber(arg2)
local depth = tonumber(arg3)
local superSecretFix = tonumber(arg4)

-- Validate arguments
if not (depth % 3 == 0) then
  print("- Depth should be a multiple of 3 for maximum efficiency.")
  return
end

-- Declare values used for mining
local distanceMovedAlongZ = 0
local distanceMovedAlongY = 0
local distanceMovedAlongX = 0

-- Plan fuel necessary for each layer
local fuelNeededForEachLayer = width * height + (height % 2 == 0 and height or width) + 3

-- Begin mining loop
for z = 1, depth - 1, 3 do
  -- Check if we have enough fuel
  if turtle.getFuelLevel() < fuelNeededForEachLayer + distanceMovedAlongZ then
    -- We don't have enough fuel
    print("- Not enough fuel, trying to refuel using all fuel in own inventory...")

    for i = 1, 16 do
      turtle.select(i)
      turtle.refuel()
    end

    -- Fix seleection back to first slot
    turtle.select(1)

    -- Did we get anything?
    if turtle.getFuelLevel() < fuelNeededForEachLayer + distanceMovedAlongZ then
      -- We didn't
      print("- There wasn't enough fuel in the inventory to get through this layer, coming back up...")

      for i = 1, distanceMovedAlongZ do
        turtle.up()
      end

      print("- Quitting because of no fuel :(")

      return
    end
  end

  -- Check if we have enough inventory space
  local freeSlots = 0
  for i = 1, 16 do
    if turtle.getItemSpace(i) == 64 then
      freeSlots = freeSlots + 1
    end
  end

  if freeSlots < 2 then
    print("- There aren't enough free slots, coming back up to empty inventory...")

    -- Move back up and dump everything to the chest
    for i = 1, distanceMovedAlongZ do
      turtle.up()
    end

    turtle.turnRight()
    turtle.turnRight()

    for i = 1, 16 do
      turtle.select(i)

      if turtle.getItemCount(i) > 0 then
        if not turtle.drop() then
          print("- Chest seems to be full, quitting.")

          turtle.turnRight()
          turtle.turnRight()

          return
        end
      end
    end

    turtle.turnRight()
    turtle.turnRight()

    turtle.select(1)

    -- Move back down to continue with next layer
    for i = 1, distanceMovedAlongZ do
      turtle.down()
    end
  else
    print("- There are " .. freeSlots .. " item slots available still.")
  end

  -- Get into position
  turtle.digDown()
  turtle.down()
  distanceMovedAlongZ = distanceMovedAlongZ + 1
  turtle.digDown()
  turtle.down()
  distanceMovedAlongZ = distanceMovedAlongZ + 1
  turtle.digDown()

  -- Loop vertically
  for h = 1, height, 1 do
    -- At the start of each row, check if we are at the further end from the chest or not
    if h % 2 == 0 then
      -- We are horizontally far away from the initial position, so we turn left to come back towards the chest
      turtle.turnLeft()
    else
      -- We aim away from the initial position
      turtle.turnRight()
    end

    -- Loop along the width
    for w = 1, width - 1, 1 do
      -- Do a dig cycle
      while turtle.inspect() do
        turtle.dig()
      end
      turtle.forward()

      -- If we are going away from the chest we increase X distance, otherwise decrease it
      if h % 2 == 0 then
        distanceMovedAlongX = distanceMovedAlongX - 1
      else
        distanceMovedAlongX = distanceMovedAlongX + 1
      end

      turtle.digUp()
      turtle.digDown()
    end

    -- We have reached the end of the cube to mine,
    -- we can turn and move towards the new row
    if h % 2 == 0 then
      turtle.turnRight()
    else
      turtle.turnLeft()
    end

    -- Check if this is the last row or not
    if not (h == height) then
      -- If there's gonna be a new row we do a dig cycle to start it
      while turtle.inspect() do
        turtle.dig()
      end
      turtle.forward()
      distanceMovedAlongY = distanceMovedAlongY + 1
      turtle.digUp()
      turtle.digDown()
    end
  end

  -- At the end of a layer, we come back to the start of the current layer

  -- Cancel all Y movement
  for i = 1, distanceMovedAlongY, 1 do
    turtle.back()
  end

  -- Cancel all X movement
  turtle.turnLeft()
  for i = 1, distanceMovedAlongX, 1 do
    turtle.forward()
  end
  turtle.turnRight()

  -- Move down one last block to get back to start of the cycle
  turtle.down()
  distanceMovedAlongZ = distanceMovedAlongZ + 1

  -- Reset distances traveled to be used in the next layer
  distanceMovedAlongX = 0
  distanceMovedAlongY = 0
end

-- Come back up
for i = 1, distanceMovedAlongZ - 1 do
  turtle.up()
end

print("Done!")