View difference between Paste ID: 3QHRWnMk and xjsLsCZ9

 --[[
 	Lazy Nub Tunneller v0.03
 
 	Will tell your turtle how to build
 	an amazingly wonderful tunnel for you,
 	with torch and chest placement if requested.
 
 	Chest(s) slot = 14
 	Fuel slot = 15
 	Torch(s) slot = 16
 
 	Minimum Length = 1
 	        Width = 1
 	        Height = 3
 
 	If you wish to skip the UI and start tunneller with commands directly
 	the format is:
 
 	<program name> <Length> <Width> <Height> [Torch Distance]
 
 	ie: lnt 16 1 3 6
 
 	This would start the tunnel with a length of 16 width of 1
 	height of 3 and torches spaced 6 apart. The torches can be
 	omitted from the line and none will be placed.
 
 	With this option tunneller assumes you have enough fuel and torches in place.
 	If you use the command line method it will assume you wish to use chests if the
 	chest slot is occupied.
 
 	If any of your numbers fail the limits of the program it will
 	default to normal UI operation.
 
 	ComputerCraft Posting: http://www.computercraft.info/forums2/index.php?/topic/13224-lazy-nub-tunneller/
 	PasteBin: http://pastebin.com/xjsLsCZ9
 	YouTube: http://youtu.be/DVF4VAfNfio
 
 	Load into turtle with:
 	pastebin get xjsLsCZ9 lnt
 
 	Then start it with:
 	lnt
 
 	Changes:
 	June 2	-	Released v0.01
 	June 3  -	UI fixes command line option added  v0.02
 	June 4 	-	Added inventory drop-off
 
 ]]--
 
 	local running = true
 	local tunnelLength = 0
 	local tunnelWidth = 0
 	local tunnelHeight = 0
 	local tunnel = 0
 	local chestSlot = 14
 	local fuelSlot = 15
 	local torchSlot = 16
 	local placeChest = false
 	local placeTorch = false
 	local torchDistance = 0
 	local lastEmptySlot = 13
 	local neededFuel = 0
 	local args = { ... }
 	local params = false
 	local block = 1
 
 --[[ Robust Turtle
  Modified version of
  Robust Turtle API by SpeedR
  integrated
 ]]--
 
 	local digDelay = .7
 	local digTries = 25
 
 local function outOfResource()
   print("Ran out of a resource. Block: ",block , ".")
   print("Refill, then say something to proceed.")
   read()
 end
 
 --Digging with gravel/sand detection
 function dig()
   local tries = 0
   while turtle.detect() do
     turtle.dig()
     sleep(digDelay)
     tries = tries + 1
     if tries>digTries then
       print("Error: dug for too long.")
       return false
     end
   end
   return true
 end
 
 function digUp()
   local tries = 0
   while turtle.detectUp() do
     turtle.digUp()
     sleep(digDelay)
     tries = tries + 1
     if tries>digTries then
       print("Error: dug up for too long.")
       return false
     end
   end
   return true
 end
 
 function digDown()
   local tries = 0
   while turtle.detectDown() do
     turtle.digDown()
     sleep(digDelay)
     tries = tries + 1
     if tries>digTries then
       print("Error: dug down for too long.")
       return false
     end
   end
   return true
 end
 
 
 --Traveling: Goes in the direction no matter what (almost)
 --Will not be stopped by blocks or mobs
 function forward(l)
   l=l or 1
   for i=1,l do
     local tries = 0
     while turtle.forward() ~= true do
       turtle.dig()
       turtle.attack()
       sleep(digDelay)
       tries = tries + 1
       if tries>digTries then
         print("Error: can't move forward.")
         return false
       end
     end
   end
   return true
 end
 
 function up(l)
   l=l or 1
   for i=1,l do
     local tries = 0
     while turtle.up() ~= true do
       turtle.digUp()
       turtle.attackUp()
       sleep(digDelay)
       tries = tries + 1
       if tries>digTries then
         print("Error: can't move up.")
         return false
       end
     end
   end
   return true
 end
 
 function down(l)
   l=l or 1
   for i=1,l do
     local tries = 0
     while turtle.down() ~= true do
       turtle.digDown()
       turtle.attackDown()
       sleep(digDelay)
       tries = tries + 1
       if tries>digTries then
         print("Error: can't move down.")
         return false
       end
     end
   end
   return true
 end
 
 function back(l)
   l=l or 1
   for i=1,l do
     if turtle.back() ~= true then
       turnAround()
       forward()
       turnAround()
     end
   end
 end
 
 
 --Place blocks
 --Does not place when there's already the right block.
 function place(block)
   turtle.select(block)
   if turtle.compare()==false then
     if turtle.getItemCount(block)==0 then
       outOfResource(block)
     end
     dig()
     turtle.place()
   end
 end
 
 function placeUp(block)
   turtle.select(block)
   if turtle.compareUp()==false then
     if turtle.getItemCount(block)==0 then
       outOfResource(block)
     end
     digUp()
     turtle.placeUp()
   end
 end
 
 function placeDown(block)
   turtle.select(block)
   if turtle.compareDown()== false then
     if turtle.getItemCount(block)== 0 then
       outOfResource(block)
     end
     digDown()
     turtle.placeDown()
   end
 end
 
 function placeRight(block)
   turtle.turnRight()
   place(block)
   turtle.turnLeft()
 end
 
 function placeLeft(block)
   turtle.turnLeft()
   place(block)
   turtle.turnRight()
 end
 
 function placeBack(block)
   turnAround()
   place(block)
   turnAround()
 end
 
 --place row     e.g. placeRow(up, marble, forward, 15)
 function placeRow(placeDir, block, travelDir, l)
   l=l or 1
   for i=1,l do
     if placeDir == "forward" then
       place(block)
     elseif placeDir == "up" then
       placeUp(block)
     elseif placeDir == "down" then
       placeDown(block)
     elseif placeDir == "right" then
       placeRight(block)
     elseif placeDir == "left" then
       placeLeft(block)
     elseif placeDir == "back" then
       placeBack(block)
     else
       print('"', placeDir, '" is not a valid direction!')
       return false
     end
     if travelDir == "forward" then
       forward()
     elseif travelDir == "up" then
       up()
     elseif travelDir == "down" then
       down()
     elseif travelDir == "right" then
       strafeRight()
     elseif travelDir == "left" then
       strafeLeft()
     elseif travelDir == "back" then
       back()
     else
       print('"', travelDir, '" is not a valid direction!')
       return false
     end
   end
   return true
 end
 
 
 --Turning
 function turnAround()
   turtle.turnRight()
   turtle.turnRight()
 end
 
 function right()
   turtle.turnRight()
 end
 
 function left()
   turtle.turnLeft()
 end
 
 function goRight(l)
   l=l or 1
   turtle.turnRight()
   forward(l)
 end
 
 function goLeft(l)
   l=l or 1
   turtle.turnLeft()
   forward(l)
 end
 
 function strafeRight(l)
   l=l or 1
   goRight(l)
   turtle.turnLeft()
 end
 
 function strafeLeft(l)
   l=l or 1
   goLeft(l)
   turtle.turnRight()
 end
 --[[ End of Robust Turtle
 ]]--
 
 
 function dumpInv()							--Dumps inventory to chest
 	print("Placing chest..")
 	placeDown(chestSlot)
 	for i = 1,lastEmptySlot do
 		turtle.select(i)
 		turtle.dropDown()
 	end
 	print("Emptied into chest..")
 	turtle.select(1)
 end
 
 function checkSpace()
 --[[
 	will remove noiseblocks and compress in future version maybe
 	if turtle.getItemCount(lastEmptySlot) > 0 then
 		print("Trying to make room...")
 		for i = 2,lastEmptySlot,1 do
             if turtle.getItemCount(i)> 0 then
                 for j = i-1,1,-1 do
                     turtle.select(i-j)
                     turtle.transferTo(j)
 					ut = read()
 				end
 			end
         end
 		]]--
 		if turtle.getItemCount(lastEmptySlot) > 0 then
 			dumpInv()
 		end
 
 end
 
 --[[ MAIN START ]]--
 
 if (#args < 3 or #args > 4) then				-- Parse command line arguments if found
     params = false
 	print("Command Line Option Skipped...")
 	print("program name <Length> <Width> <Height> [Torch Distance]")
 else
 	params = true
 	tunnelLength = tonumber(args[1])
 	tunnelWidth = tonumber(args[2])
 	tunnelHeight = tonumber(args[3])
 	if #args == 4 then
 		torchDistance = tonumber(args[4])
 		placeTorch = true
 		if type( torchDistance ) ~= "number" or torchDistance < 1 then
 			params = false
 		end
 	end
 	if turtle.getItemCount(chestSlot) > 0 then
 		placeChest = true
 	end
 	if type(tunnelLength) ~= "number" or tunnelLength < 1 or
 	   type(tunnelWidth) ~= "number" or tunnelWidth < 1 or
 	   type(tunnelHeight) ~= "number" or tunnelHeight < 3 or
-	   turtle.getFuelLevel() < ((tunnelLength*tunnelWidth)+((tunnelHeight-3)*(tunnelLength*tunnelWidth)))+1 then
+	   turtle.getFuelLevel() < 1 then
 		params = false
 	end
 end
 
 if params == false then							-- Start UI if invalid or no command line
 	term.clear()
 	term.setCursorPos (1, 1)
 	print("Lazy Nub Tunneller v0.03")
 	print("=====================")
 	while tunnelLength < 1 do
 		print("What length of tunnel (min = 1): ")
 		tunnelLength = tonumber(read())
 		if type( tunnelLength ) ~= "number" or tunnelLength == 0 then
 			print ("I was expecting a number 1 or higher...")
 			print ("Lets try that again.")
 			tunnelLength = 0
 		end
 	end
 	while tunnelWidth < 1 do
 		print("What width of tunnel (min = 1): ")
 		tunnelWidth = tonumber(read())
 		if type( tunnelWidth ) ~= "number" or tunnelWidth == 0 then
 			print ("I was expecting a number 1 or higher...")
 			print ("Lets try that again.")
 			tunnelWidth = 0
 		end
 	end
 	while tunnelHeight < 3 do
 		print("What height of tunnel (min = 3): ")
 		tunnelHeight = tonumber(read())
 		if type( tunnelHeight ) ~= "number" or tunnelHeight < 3 then
 			print ("I was expecting a number 3 or higher...")
 			print ("Lets try that again.")
 			tunnelHeight = 0
 		end
 	end
 	print("Use Torches (y/n): ")
 	ut = read()
 	if ut == "y" or ut == "Y" then
 		placeTorch = true
 		while torchDistance < 1 do
 			print("Place How Far Apart (suggest 6): ")
 			torchDistance = tonumber(read())
 			if type( torchDistance ) ~= "number" or torchDistance < 1 then
 				print ("I was expecting a number 1 or higher...")
 				print ("Lets try that again.")
 				torchDistance = 0
 			end
 		end
 
 		-- check if enough torches.. still need to verify this check total
 
 		if ((tunnelLength/torchDistance)*(tunnelWidth/torchDistance)) > (turtle.getItemCount(torchSlot)) then
 			turtle.select(torchSlot)
 			print("Place about "..((math.ceil(tunnelLength/torchDistance)*math.ceil(tunnelWidth/torchDistance))+2).." in slot "..torchSlot.." <ENTER>")
 			ut = read()
 			turtle.select(1)
 		end
 	end
 	print("Use Chests (y/n): ")
 	ut = read()
 	if ut == "y" or ut == "Y" then
 		placeChest = true
 		turtle.select(chestSlot)
 		while turtle.getItemCount(chestSlot) < 1 do
 			print("Place at least 1 chest in slot "..chestSlot)
 			print("Press <ENTER> when done.")
 			ut = read()
 		end
 		turtle.select(1)
 	end
 
 	-- check for fuel in turtle at start matches needed level
 
 	neededFuel = ((tunnelLength*tunnelWidth)+((tunnelHeight-3)*(tunnelLength*tunnelWidth)))+1
 	if turtle.getFuelLevel() < neededFuel then
 		turtle.select(fuelSlot)
 		turtle.refuel(1)
 		turtle.select(1)
 	end
 	if turtle.getFuelLevel() < neededFuel then
 		print("Fuel Level at: "..turtle.getFuelLevel())
 		while turtle.getFuelLevel() < neededFuel do
 			turtle.select(fuelSlot)
 			print ("Place fuel item into slot "..fuelSlot.." and press <Enter>")
 			ut = read()
 			turtle.refuel(1)
 			print("Fuel Level at: "..turtle.getFuelLevel())
 		end
 		turtle.select(1)
 	end
 end
 
 -- Main loop
 
 while running do
 	up()
 	for tunnel = 1,tunnelLength do
 		forward()
 		digUp()
 		digDown()
 		if placeChest == true then
 			checkSpace()
 		end
 		if tunnel%torchDistance == 0 then
 			placeDown(torchSlot)
 		end
 		if tunnelHeight > 3 then
 			for Height = 4,tunnelHeight,1 do
 				up()
 				digUp()
 			end
 			for Height = tunnelHeight,4,-1 do
 				down()
 			end
 		end
 		if tunnelWidth > 1 then
 			if tunnel%2 == 0 then
 				left()
 			else
 				right()
 			end
 			for width = 2,tunnelWidth do
 				forward()
 				digUp()
 				digDown()
 				if placeChest == true then
 					checkSpace()
 				end
 				if ((width%torchDistance == 0) and (tunnel%torchDistance == 0)) then
 					placeDown(torchSlot)
 				end
 				if tunnelHeight > 3 then
 					for Height = 4,tunnelHeight,1 do
 						up()
 						digUp()
 					end
 					for Height = tunnelHeight,4,-1 do
 						down()
 					end
 				end
 			end
 			if tunnel%2 == 0 then
 				right()
 			else
 				left()
 			end
 		end
 	end
 	down()
 	if placeTorch == true then
 		turnAround()
 		place(torchSlot)
 		turnAround()
 	end
 	if placeChest then
 		if tunnelLength%2==0 then
 			left()
 		else
 			right()
 		end
 		back()
 		up()
 		dumpInv()
 		forward()
 		if tunnelLength%2==0 then
 			right()
 		else
 			left()
 		end
 		down()
 	end
 	running = false
 end