computercraft turtle commands
-- Turtle inventory should be 4 by 4
-- A chest or an inventory should be present at the left of the starting position
-- The block layer at the turtle's level should be clear, fully digged for the defined mining zone
-- Fuel should be on the lower right slot
-- Any well-sealing block should be on slot 15, left of the fuel
-- Blocks not to be mined should be on the first line

-- Define the mining zone here
MaxForward = 16
MaxRight = 16
-- Number of holes to skip (beginning)
computercraft turtle commands How to get it? computercraft turtle commands
SkipHoles = 0

local pos = {0, 0, 0}
local facing = 0
local curMessage = ''

function tWrite(txt)
	term.clear()
	term.setCursorPos(1, 1)
	if txt then term.write(txt)
computercraft turtle commands How to get it? computercraft turtle commands
	else term.write(curMessage)
	end
end

function turnRight(n)
	n = n or 1
	
	while n > 0 do
		n = n - 1
		facing = (facing + 1) % 4
computercraft turtle commands How to get it for free? computercraft turtle commands
		turtle.turnRight()
	end
end

function turnLeft(n)
	n = n or 1
	
	while n > 0 do
		n = n - 1
		facing = (facing - 1) % 4
computercraft turtle commands How to dowload it? computercraft turtle commands
		turtle.turnLeft()
	end
end

function right(n)
	n = n or 1
	checkFuel(n)

	if facing == 0 then
		turnRight()
computercraft turtle commands PasteShr computercraft turtle commands
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[1] = pos[1] + 1
			end
		end
	elseif facing == 1 then
		while n > 0 do
			if turtle.forward() then
				n = n - 1
computercraft turtle commands How to use it? computercraft turtle commands
				pos[1] = pos[1] + 1
			end
		end
	elseif facing == 2 then
		turnLeft()
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[1] = pos[1] + 1
			end
computercraft turtle commands How to get it? computercraft turtle commands
		end
	else
		while n > 0 do
			if turtle.back() then
				n = n - 1
				pos[1] = pos[1] + 1
			end
		end
	end
end
computercraft turtle commands PasteShr computercraft turtle commands

function left(n)
	n = n or 1
	checkFuel(n)
	
	if facing == 0 then
		turnLeft()
		while n > 0 do
			if turtle.forward() then
				n = n - 1
computercraft turtle commands How to use it? computercraft turtle commands
				pos[1] = pos[1] - 1
			end
		end
	elseif facing == 1 then
		while n > 0 do
			if turtle.back() then
				n = n - 1
				pos[1] = pos[1] - 1
			end
		end
computercraft turtle commands How to use it? computercraft turtle commands
	elseif facing == 2 then
		turnRight()
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[1] = pos[1] - 1
			end
		end
	else
		while n > 0 do
computercraft turtle commands How to get it for free? computercraft turtle commands
			if turtle.forward() then
				n = n - 1
				pos[1] = pos[1] - 1
			end
		end
	end
end

function forward(n)
	n = n or 1
computercraft turtle commands How to dowload it? computercraft turtle commands
	checkFuel(n)

	if facing == 0 then
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[2] = pos[2] + 1
			end
		end
	elseif facing == 1 then
computercraft turtle commands How to get it for free? computercraft turtle commands
		turnLeft()
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[2] = pos[2] + 1
			end
		end
	elseif facing == 2 then
		while n > 0 do
			if turtle.back() then
computercraft turtle commands How to dowload it? computercraft turtle commands
				n = n - 1
				pos[2] = pos[2] + 1
			end
		end
	else
		turnRight()
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[2] = pos[2] + 1
computercraft turtle commands How to get it? computercraft turtle commands
			end
		end
	end
end

function backward(n)
	n = n or 1
	checkFuel(n)

	if facing == 0 then
computercraft turtle commands How to get it for free? computercraft turtle commands
		while n > 0 do
			if turtle.back() then
				n = n - 1
				pos[2] = pos[2] - 1
			end
		end
	elseif facing == 1 then
		turnRight()
		while n > 0 do
			if turtle.forward() then
computercraft turtle commands How to use it? computercraft turtle commands
				n = n - 1
				pos[2] = pos[2] - 1
			end
		end
	elseif facing == 2 then
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[2] = pos[2] - 1
			end
computercraft turtle commands How to use it? computercraft turtle commands
		end
	else
		turnLeft()
		while n > 0 do
			if turtle.forward() then
				n = n - 1
				pos[2] = pos[2] - 1
			end
		end
	end
computercraft turtle commands PasteShr computercraft turtle commands
end

function up(n)
	n = n or 1
	checkFuel(n)
	
	while n > 0 do
		if turtle.up() then
			n = n - 1
			pos[3] = pos[3] + 1
computercraft turtle commands How to dowload it? computercraft turtle commands
		end
	end
end

function down(n)
	n = n or 1
	checkFuel(n)
	
	while n > 0 do
		if turtle.down() then
computercraft turtle commands How to dowload it? computercraft turtle commands
			n = n - 1
			pos[3] = pos[3] - 1
		end
	end
end
 
function getTo(nPos)
	if not nPos[1] then nPos[1] = pos[1] end
	if not nPos[2] then nPos[2] = pos[2] end
	if not nPos[3] then nPos[3] = pos[3] end
computercraft turtle commands How to get it? computercraft turtle commands
	diff = {nPos[1] - pos[1], nPos[2] - pos[2], nPos[3] - pos[3]}

	-- Right / left
	if diff[1] > 0 then right(diff[1])
	elseif diff[1] < 0 then left(-diff[1])
	end
  
	-- Forward / backward
	if diff[2] > 0 then forward(diff[2])
	elseif diff[2] < 0 then backward(-diff[2])
computercraft turtle commands How to dowload it? computercraft turtle commands
	end
	
	-- Up / down
	if diff[3] > 0 then up(diff[3])
	elseif diff[3] < 0 then down(-diff[3])
	end
end

function checkFuel(n)
	if turtle.getFuelLevel() < n then
computercraft turtle commands PasteShr computercraft turtle commands
		tWrite('Refueling...')
		
		turtle.select(16)
		while turtle.getFuelLevel() < n do
			turtle.refuel(1)
		end
		
		tWrite()
	end
end
computercraft turtle commands PasteShr computercraft turtle commands

function startingPoint(row)
	return (2 * (row-1)) % 5 + 1
end

function ascend()
	curMessage = 'Ascending...'
	tWrite()
		
	while pos[3] < 0 do
computercraft turtle commands PasteShr computercraft turtle commands
		if turtle.detectUp() then turtle.digUp() end
		up()
	end
	
	turtle.select(15)
	turtle.placeDown()
	
	tWrite()
end

computercraft turtle commands How to get it? computercraft turtle commands
function drillSides()
	for i = 0, 3, 1 do
		local canDig = true
		
		for j = 1, 4, 1 do
			turtle.select(j)
			if turtle.compare() then canDig = false end
		end
		
		if canDig then turtle.dig() end
computercraft turtle commands How to use it? computercraft turtle commands
		if i ~=3 then turnLeft() end
	end
end

function drill()
	curMessage = 'Drilling...'
	tWrite()
		
	while (not turtle.detectDown()) or (turtle.detectDown() and turtle.digDown()) do
		down()
computercraft turtle commands How to dowload it? computercraft turtle commands
		drillSides()
	end
	
	ascend()
	
	tWrite()
end

function drillRow(row)
	getTo({row, startingPoint(row)})
computercraft turtle commands How to get it? computercraft turtle commands
	
	local willMove = 0
	
	while (pos[2] + willMove) <= (MaxForward - 2) do
		emptyInventory()
		
		if willMove == 0 then willMove = 5
		else forward(willMove)
		end
		
computercraft turtle commands PasteShr computercraft turtle commands
		if SkipHoles == 0 then drill()
		else SkipHoles = SkipHoles - 1
		end
	end
end

function emptyInventory()
	curMessage = 'Emptying inventory...'
	tWrite()
	
computercraft turtle commands How to get it for free? computercraft turtle commands
	local curPos = {pos[1], pos[2]}
	getTo({0,0})
	
	while facing ~= 3 do
		turnRight()
	end
	
	for i = 5, 14, 1 do
		turtle.select(i)
		turtle.drop()
computercraft turtle commands PasteShr computercraft turtle commands
	end
	
	getTo(curPos)
	
	tWrite()
end

tWrite('Initializing...')

for i = 1, MaxRight - 2, 1 do
computercraft turtle commands How to get it for free? computercraft turtle commands
	drillRow(i)
end

tWrite('Ended')

computercraft turtle commands