View difference between Paste ID: emGHrp3i and RAHj4r2K

 -- Variable Setup
 -- Command Line input Table
 local argTable = {...}
 
 -- Flag Variables: These are conditions for different features (all flags are named foo_bar, all other variables are named fooBar)
 local cmd_line = false
 local cmd_line_resume = false
 local cmd_line_cost_only = false
 local chain_next_shape = false -- This tells goHome() where to end, if true it goes to (0, 0, positionZ) if false it goes to (-1, -1, 0)
 local special_chain = false -- For certain shapes that finish where the next chained shape should start, goHome() will  only turn to face 0 if true
 local cost_only = false
 local sim_mode = false
 local resupply = false
 local enderchest_refilling = false
 local can_use_gps = false
 local return_to_home = false -- whether the turtle shall return to start after build
 
 -- Record Keeping Variables: These are for recoding the blocks and fuel used
 local blocks = 0
 local fuel = 0
 
 -- Position Tracking Variables: These are for keeping track of the turtle's position
 local positionX = 0
 local positionY = 0
 local positionZ = 0
 local facing = 0
 local gpsPositionX = 0
 local gpsPositionY = 0
 local gpsPositionZ = 0
 local gpsFacing = 0
 
 -- General Variables: Other variables that don't fit in the other categories
 local choice = ""
 
 -- Progress Table: These variables are the tables that the turtle's progress is tracked in
 local tempProgTable = {}
 local progTable = {} --This is the LOCAL table!  used for local stuff only, and is ONLY EVER WRITTEN when sim_mode is FALSE
 local progFileName = "ShapesProgressFile"
 
 -- Utility functions
 
 function writeOut(...) -- ... lets writeOut() pass any arguments to print(). so writeOut(1,2,3) is the same as print(1,2,3). previously writeOut(1,2,3) would have been the same as print(1)
 	for i, v in ipairs(arg) do
 		print(v)
 	end
 end
 
 function getInput(inputType, message, option1, option2)
 	local input = ""
 	if inputType == "string" then
 		writeOut(message.. "(" ..option1 .. " or "..option2..")" )
 		while true do
 			input = io.read()
 			input = string.lower(input)
 			if input ~= option1 and input ~= option2 then
 				writeOut("You didn't enter a valid option. Please try again.")
 			else
 				return input
 			end
 		end
 	end
 	if inputType == "int" then
 		writeOut(message)
 		while true do
 			input = io.read()
 			if tonumber(input) ~= nil then
 				return tonumber(input)
 			else
 				writeOut("Need a number. Please try again")
 			end
 		end
 	end
 end
 
 function wrapModules() -- checks for and wraps turtle modules
 	local test = 0
 	if peripheral.getType("left" )== "resupply" then
 		resupplymodule=peripheral.wrap("left")
 		resupply = true
 	elseif peripheral.getType("right") == "resupply" then
 		resupplymodule=peripheral.wrap("right")
 		resupply = true
 	end
 	if peripheral.getType("left") == "modem" then
 		modem=peripheral.wrap("left")
 		test, _, _ = gps.locate(1)
 		if test ~= nil then
 			can_use_gps = true
 		end
 	elseif peripheral.getType("right") == "modem" then
 		modem=peripheral.wrap("right")
 		test, _, _ = gps.locate(1)
 		if test ~= nil then
 			can_use_gps = true
 		end
 	end
 	if resupply then
 		return "resupply"
 	end
 end
 
 function linkToRSStation() -- Links to resupply station
 	if resupplymodule.link() then
 		return true
 	else
 		writeOut("Please put Resupply Station to the left of the turtle and press Enter to continue")
 		io.read()
 		linkToRSStation()
 	end
 end
 
 function compareResources()
 	if (turtle.compareTo(1) == false) then
 		turtle.drop()
 	end
 end
 
 function firstFullSlot()
 	for i = 1, 16 do
 		if (turtle.getItemCount(i) > 1) then
 			return i
 		end
 	end
 end
 
 function turtleEmpty()
 	for i = 1, 16 do
 		if (turtle.getItemCount(i) > 1) then
 			return false
 		end
 	end
 	return true
 end
 
 function checkResources()
 	if resupply then
 		if turtle.getItemCount(activeSlot) <= 1 then
 			while not(resupplymodule.resupply(1)) do
 				os.sleep(0.5)
 			end
 		end
 	elseif enderchest_refilling then
 		compareResources()
 		while (turtle.getItemCount(activeSlot) <= 1) do
 			if (activeSlot == 15) and (turtle.getItemCount(activeSlot)<=1) then
 				turtle.select(16)
 				turtle.digUp()
 				for i = 1, 15 do
 					turtle.select(i)
 					turtle.drop()
 				end
 				turtle.select(16)
 				turtle.placeUp()
 				turtle.select(1)
 				for i = 1, 15 do
 					turtle.suckUp()
 				end
 				turtle.select(16)
 				turtle.digUp()
 				activeSlot = 1
 				turtle.select(activeSlot)
 			else
 				activeSlot = activeSlot + 1
 				-- writeOut("Turtle slot empty, trying slot "..activeSlot)
 				turtle.select(activeSlot)
 			end
 			compareResources()
 			os.sleep(0.2)
 		end
 	else
 		compareResources()
 		while (turtle.getItemCount(activeSlot) <= 1) do
 			if turtleEmpty() then
 				writeOut("Turtle is empty, please put building block in slots and press enter to continue")
 				io.read()
 				activeSlot = 1
 				turtle.select(activeSlot)
 			else
 				activeSlot = firstFullSlot()
 				turtle.select(activeSlot)
 			end
 			compareResources()
 		end
 	end
 end
 
 function checkFuel()
 	if (not(tonumber(turtle.getFuelLevel()) == nil)) then
 		while turtle.getFuelLevel() < 50 do
 			writeOut("Turtle almost out of fuel, pausing. Please drop fuel in inventory. And press enter.")
 			io.read()
 			turtle.refuel()
 		end
 	end
 end
 
 function placeBlock()
 	blocks = blocks + 1
 	simulationCheck()
 	if cost_only then
 		return
 	end
 	if turtle.detectDown() and not turtle.compareDown() then
 		turtle.digDown()
 	end
 	checkResources()
 	turtle.placeDown()
 	progressUpdate()
 end
 
 function round(toBeRounded, decimalPlace) -- Needed for hexagon and octagon
 	local multiplier = 10^(decimalPlace or 0)
 	return math.floor(toBeRounded * multiplier + 0.5) / multiplier
 end
 
 -- Navigation functions
 -- Allow the turtle to move while tracking its position
 -- This allows us to just give a destination point and have it go there
 
 function turnRightTrack()
 	simulationCheck()
 	facing = facing + 1
 	if facing >= 4 then
 		facing = 0
 	end
 	progressUpdate()
 	if cost_only then
 		return
 	end
 	turtle.turnRight()
 end
 
 function turnLeftTrack()
 	simulationCheck()
 	facing = facing - 1
 	if facing < 0 then
 		facing = 3
 	end
 	progressUpdate()
 	if cost_only then
 		return
 	end
 	turtle.turnLeft()
 end
 
 function turnAroundTrack()
 	turnLeftTrack()
 	turnLeftTrack()
 end
 
 function turnToFace(direction)
 	if (direction < 0) then
 		return false
 	end
 	direction = direction % 4
 	while facing ~= direction do
 		turnRightTrack()
 	end
 	return true
 end
 
 function safeForward()
 	simulationCheck()
 	if facing == 0 then
 		positionY = positionY + 1
 	elseif facing == 1 then
 		positionX = positionX + 1
 	elseif facing == 2 then
 		positionY = positionY - 1
 	elseif facing == 3 then
 		positionX = positionX - 1
 	end
 	fuel = fuel + 1
 	progressUpdate()
 	if cost_only then
 		return
 	end
 	checkFuel()
 	local success = false
 	local tries = 0
 	while not success do
 		success = turtle.forward()
 		if not success then
 			while (not success) and tries < 6 do
 				tries = tries + 1
 				turtle.dig()
 				success = turtle.forward()
 				sleep(0.3)
 			end
 			if not success then
 				writeOut("Blocked attempting to move forward.")
 				writeOut("Please clear and press enter to continue.")
 				io.read()
 			end
 		end
 	end
 end
 
 function safeBack()
 	simulationCheck()
 	if facing == 0 then
 		positionY = positionY - 1
 	elseif facing == 1 then
 		positionX = positionX - 1
 	elseif facing == 2 then
 		positionY = positionY + 1
 	elseif facing == 3 then
 		positionX = positionX + 1
 	end
 	fuel = fuel + 1
 	progressUpdate()
 	if cost_only then
 		return
 	end
 	checkFuel()
 	local success = false
 	local tries = 0
 	while not success do
 		success = turtle.back()
 		if not success then
 			turnAroundTrack()
 			while turtle.detect() and tries < 6 do
 				tries = tries + 1
 				if turtle.dig() then
 					break
 				end
 				sleep(0.3)
 			end
 			turnAroundTrack()
 			success = turtle.back()
 			if not success then
 				writeOut("Blocked attempting to move back.")
 				writeOut("Please clear and press enter to continue.")
 				io.read()
 			end
 		end
 	end
 end
 
 function safeUp()
 	simulationCheck()
 	positionZ = positionZ + 1
 	fuel = fuel + 1
 	progressUpdate()
 	if cost_only then
 		return
 	end
 	checkFuel()
 	local success = false
 	while not success do
 		success = turtle.up()
 		if not success then
 			while turtle.detectUp() do
 				if not turtle.digUp() then
 					writeOut("Blocked attempting to move up.")
 					writeOut("Please clear and press enter to continue.")
 					io.read()
 				end
 			end
 		end
 	end
 end
 
 function safeDown()
 	simulationCheck()
 	positionZ = positionZ - 1
 	fuel = fuel + 1
 	progressUpdate()
 	if cost_only then
 		return
 	end
 	checkFuel()
 	local success = false
 	while not success do
 		success = turtle.down()
 		if not success then
 			while turtle.detectDown() do
 				if not turtle.digDown() then
 					writeOut("Blocked attempting to move down.")
 					writeOut("Please clear and press enter to continue.")
 					io.read()
 				end
 			end
 		end
 	end
 end
 
 function moveY(targetY)
 	if targetY == positionY then
 		return
 	end
 	if (facing ~= 0 and facing ~= 2) then -- Check axis
 		turnRightTrack()
 	end
 	while targetY > positionY do
 		if facing == 0 then
 			safeForward()
 		else
 			safeBack()
 		end
 	end
 	while targetY < positionY do
 		if facing == 2 then
 			safeForward()
 		else
 			safeBack()
 		end
 	end
 end
 
 function moveX(targetX)
 	if targetX == positionX then
 		return
 	end
 	if (facing ~= 1 and facing ~= 3) then -- Check axis
 		turnRightTrack()
 	end
 	while targetX > positionX do
 		if facing == 1 then
 			safeForward()
 		else
 			safeBack()
 		end
 	end
 	while targetX < positionX do
 		if facing == 3 then
 			safeForward()
 		else
 			safeBack()
 		end
 	end
 end
 
 function moveZ(targetZ)
 	if targetZ == positionZ then
 		return
 	end
 	while targetZ < positionZ do
 		safeDown()
 	end
 	while targetZ > positionZ do
 		safeUp()
 	end
 end
 
 -- I *HIGHLY* suggest formatting all shape subroutines to use the format that dome() uses;  specifically, navigateTo(x,y,[z]) then placeBlock().  This should ensure proper "data recording" and also makes readability better
 function navigateTo(targetX, targetY, targetZ, move_z_first)
 	targetZ = targetZ or positionZ -- If targetZ isn't used in the function call, it defaults to its current z position, this should make it compatible with all previous implementations of navigateTo()
 	move_z_first = move_z_first or false -- Defaults to moving z last, if true is passed as 4th argument, it moves vertically first
 
 	if move_z_first then
 		moveZ(targetZ)
 	end
 
 	if facing == 0 or facing == 2 then -- Y axis
 		moveY(targetY)
 		moveX(targetX)
 	else
 		moveX(targetX)
 		moveY(targetY)
 	end
 
 	if not move_z_first then
 		moveZ(targetZ)
 	end
 end
 
 function goHome()
 	if chain_next_shape then
 		if not special_chain then
 			navigateTo(0, 0) -- So another program can chain multiple shapes together to create bigger structures
 		end
 	else
 		navigateTo(-1, -1, 0) -- So the user can collect the turtle when it is done, not 0,0,0 because some shapes use the 0,0 column
 	end
 	turnToFace(0)
 end
 
 -- Shape Building functions
 
 function drawLine(endX, endY, startX, startY)
 	startX = startX or positionX
 	startY = startY or positionY
 	deltaX = math.abs(endX - startX)
 	deltaY = math.abs(endY - startY)
 	errorVar = 0
 	if deltaX >= deltaY then
 		deltaErr = math.abs(deltaY/deltaX)
 		if startX < endX then
 			if startY < endY then
 				counterY = startY
 				for counterX = startX, endX do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterY = counterY + 1
 						errorVar = errorVar - 1
 					end
 				end
 			else
 				counterY = startY
 				for counterX = startX, endX do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterY = counterY - 1
 						errorVar = errorVar - 1
 					end
 				end
 			end
 		else
 			if startY < endY then
 				counterY = startY
 				for counterX = startX, endX, -1 do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterY = counterY + 1
 						errorVar = errorVar - 1
 					end
 				end
 			else
 				counterY = startY
 				for counterX = startX, endX, -1 do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterY = counterY - 1
 						errorVar = errorVar - 1
 					end
 				end
 			end
 		end
 	else
 		deltaErr = math.abs(deltaX/deltaY)
 		if startY < endY then
 			if startX < endX then
 				counterX = startX
 				for counterY = startY, endY do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterX = counterX + 1
 						errorVar = errorVar - 1
 					end
 				end
 			else
 				counterX = startX
 				for counterY = startY, endY do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterX = counterX - 1
 						errorVar = errorVar - 1
 					end
 				end
 			end
 		else
 			if startX < endX then
 				counterX = startX
 				for counterY = startY, endY, -1 do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterX = counterX + 1
 						errorVar = errorVar - 1
 					end
 				end
 			else
 				counterX = startX
 				for counterY = startY, endY, -1 do
 					navigateTo(counterX, counterY)
 					placeBlock()
 					errorVar = errorVar + deltaErr
 					if errorVar >= 0.5 then
 						counterX = counterX - 1
 						errorVar = errorVar - 1
 					end
 				end
 			end
 		end
 	end
 end
 
 function rectangle(width, depth, startX, startY)
 	startX = startX or positionX
 	startY = startY or positionY
 	endX = startX + width - 1
 	endY = startY + depth - 1
 	drawLine(startX, endY, startX, startY)
 	drawLine(endX, endY, startX, endY)
 	drawLine(endX, startY, endX, endY)
 	drawLine(startX, startY, endX, startY)
 end
 
 function square(length, startX, startY)
 	startX = startX or positionX
 	startY = startY or positionY
 	rectangle(length, length, startX, startY)
 end
 
 function wall(depth, height)
 	for i = 1, depth do
 		for j = 1, height do
 			placeBlock()
 			if j < height then
 				navigateTo(positionX, positionY, positionZ + 1)
 			end
 		end
 		if (i ~= depth) then
 			navigateTo(positionX, positionY + 1, 0)
 		end
 	end
 end
 
 function platform(width, depth, startX, startY)
 	startX = startX or positionX
 	startY = startY or positionY
 	endX = startX + width - 1
 	endY = startY + depth - 1
 	forward = true
 	for counterY = startY, endY do
 		if forward then
 			for counterX = startX, endX do
 				navigateTo(counterX, counterY)
 				placeBlock()
 			end
 		else
 			for counterX = endX, startX, -1 do
 				navigateTo(counterX, counterY)
 				placeBlock()
 			end
 		end
 		forward = not forward
 	end
 end
 
 function cuboid(width, depth, height, hollow)
 	for i = 0, height - 1 do
 		navigateTo(0, 0, i)
 		if (hollow == "n") then
 			platform(width, depth, 0, 0)
 		else
 			rectangle(width, depth, 0, 0)
 		end
 	end
 end
 
 function pyramid(length, hollow)
 	-- local height = math.ceil(length / 2) - 1
 	i = 0
 	while (length > 0) do
 		navigateTo(i, i, i)
 		if (hollow == "y") then
 			rectangle(length, length, i, i)
 		else
 			platform(length, length, i, i)
 		end
 		i = i + 1
 		length = length - 2
 	end
 end
 
 function stair(width, height, startX, startY) -- Last two might be able to be used to make a basic home-like shape later?
 	startX = startX or positionX
 	startY = startY or positionY
 	endX = startX + width - 1
 	endY = startY + height - 1
 	forward = true
 	for counterY = startY, endY do
 		if forward then
 			for counterX = startX, endX do
 				navigateTo(counterX, counterY)
 				placeBlock()
 			end
 		else
 			for counterX = endX, startX, -1 do
 				navigateTo(counterX, counterY)
 				placeBlock()
 			end
 		end
 		if counterY ~= endY then
 			navigateTo(positionX, positionY, positionZ + 1)
 			forward = not forward
 		end
 	end
 end
 
 function circle(diameter)
 	odd = not (math.fmod(diameter, 2) == 0)
 	radius = diameter / 2;
 	if odd then
 		width = (2 * math.ceil(radius)) + 1;
 		offset = math.floor(width/2);
 	else
 		width = (2 * math.ceil(radius)) + 2;
 		offset = math.floor(width/2) - 0.5;
 	end
 	--diameter --radius * 2 + 1
 	sqrt3 = 3 ^ 0.5
 	boundaryRadius = radius + 1.0
 	boundary2 = boundaryRadius ^ 2
 	radius2 = radius ^ 2
 	z = math.floor(radius)
 	cz2 = (radius - z) ^ 2
 	limitOffsetY = (boundary2 - cz2) ^ 0.5
 	maxOffsetY = math.ceil(limitOffsetY)
 	-- We do first the +x side, then the -x side to make movement efficient
 	for side = 0,1 do
 			-- On the right we go from small y to large y, on the left reversed
 			-- This makes us travel clockwise (from below) around each layer
 			if (side == 0) then
 				yStart = math.floor(radius) - maxOffsetY
 				yEnd = math.floor(radius) + maxOffsetY
 				yStep = 1
 			else
 				yStart = math.floor(radius) + maxOffsetY
 				yEnd = math.floor(radius) - maxOffsetY
 				yStep = -1
 			end
 			for y = yStart,yEnd,yStep do
 				cy2 = (radius - y) ^ 2
 				remainder2 = (boundary2 - cz2 - cy2)
 				if remainder2 >= 0 then
 					-- This is the maximum difference in x from the centre we can be without definitely being outside the radius
 					maxOffsetX = math.ceil((boundary2 - cz2 - cy2) ^ 0.5)
 					-- Only do either the +x or -x side
 					if (side == 0) then
 						-- +x side
 						xStart = math.floor(radius)
 						xEnd = math.floor(radius) + maxOffsetX
 					else
 						-- -x side
 						xStart = math.floor(radius) - maxOffsetX
 						xEnd = math.floor(radius) - 1
 					end
 					-- Reverse direction we traverse xs when in -y side
 					if y > math.floor(radius) then
 						temp = xStart
 						xStart = xEnd
 						xEnd = temp
 						xStep = -1
 					else
 						xStep = 1
 					end
 
 					for x = xStart,xEnd,xStep do
 						-- Only blocks within the radius but still within 1 3d-diagonal block of the edge are eligible
 						if isSphereBorder(offset, x, y, z, radius2) then
 							navigateTo(x, y)
 							placeBlock()
 						end
 					end
 				end
 			end
 		end
 end
 
 function blockInSphereIsFull(offset, x, y, z, radiusSq)
 	x = x - offset
 	y = y - offset
 	z = z - offset
 	x = x ^ 2
 	y = y ^ 2
 	z = z ^ 2
 	return x + y + z <= radiusSq
 end
 
 function isSphereBorder(offset, x, y, z, radiusSq)
 	spot = blockInSphereIsFull(offset, x, y, z, radiusSq)
 	if spot then
 		spot = not blockInSphereIsFull(offset, x, y - 1, z, radiusSq) or
 			not blockInSphereIsFull(offset, x, y + 1, z, radiusSq) or
 			not blockInSphereIsFull(offset, x - 1, y, z, radiusSq) or
 			not blockInSphereIsFull(offset, x + 1, y, z, radiusSq) or
 			not blockInSphereIsFull(offset, x, y, z - 1, radiusSq) or
 			not blockInSphereIsFull(offset, x, y, z + 1, radiusSq)
 	end
 	return spot
 end
 
 function dome(typus, diameter)
 	-- Main dome and sphere building routine
 	odd = not (math.fmod(diameter, 2) == 0)
 	radius = diameter / 2;
 	if odd then
 		width = (2 * math.ceil(radius)) + 1;
 		offset = math.floor(width/2);
 	else
 		width = (2 * math.ceil(radius)) + 2;
 		offset = math.floor(width/2) - 0.5;
 	end
 	--diameter --radius * 2 + 1
 	sqrt3 = 3 ^ 0.5
 	boundaryRadius = radius + 1.0
 	boundary2 = boundaryRadius ^ 2
 	radius2 = radius ^ 2
 
 	if typus == "dome" then
 		zstart = math.ceil(radius)
 	elseif typus == "sphere" then
 		zstart = 1
 	elseif typus == "bowl" then
 		zstart = 1
 	end
 	if typus == "bowl" then
 		zend = math.floor(radius)
 	else
 		zend = width - 1
 	end
 
 	-- This loop is for each vertical layer through the sphere or dome.
 	for z = zstart,zend do
 		if not cost_only and z ~= zstart then
 			navigateTo(positionX, positionY, positionZ + 1)
 		end
 		--writeOut("Layer " .. z)
 		cz2 = (radius - z) ^ 2
 		limitOffsetY = (boundary2 - cz2) ^ 0.5
 		maxOffsetY = math.ceil(limitOffsetY)
 		-- We do first the +x side, then the -x side to make movement efficient
 		for side = 0,1 do
 			-- On the right we go from small y to large y, on the left reversed
 			-- This makes us travel clockwise (from below) around each layer
 			if (side == 0) then
 				yStart = math.floor(radius) - maxOffsetY
 				yEnd = math.floor(radius) + maxOffsetY
 				yStep = 1
 			else
 				yStart = math.floor(radius) + maxOffsetY
 				yEnd = math.floor(radius) - maxOffsetY
 				yStep = -1
 			end
 			for y = yStart,yEnd,yStep do
 				cy2 = (radius - y) ^ 2
 				remainder2 = (boundary2 - cz2 - cy2)
 				if remainder2 >= 0 then
 					-- This is the maximum difference in x from the centre we can be without definitely being outside the radius
 					maxOffsetX = math.ceil((boundary2 - cz2 - cy2) ^ 0.5)
 					-- Only do either the +x or -x side
 					if (side == 0) then
 						-- +x side
 						xStart = math.floor(radius)
 						xEnd = math.floor(radius) + maxOffsetX
 					else
 						-- -x side
 						xStart = math.floor(radius) - maxOffsetX
 						xEnd = math.floor(radius) - 1
 					end
 					-- Reverse direction we traverse xs when in -y side
 					if y > math.floor(radius) then
 						temp = xStart
 						xStart = xEnd
 						xEnd = temp
 						xStep = -1
 					else
 						xStep = 1
 					end
 
 					for x = xStart,xEnd,xStep do
 						-- Only blocks within the radius but still within 1 3d-diagonal block of the edge are eligible
 						if isSphereBorder(offset, x, y, z, radius2) then
 							navigateTo(x, y)
 							placeBlock()
 						end
 					end
 				end
 			end
 		end
 	end
 end
 
 function cylinder(diameter, height)
 	for i = 1, height do
 		circle(diameter)
 		navigateTo(positionX, positionY, positionZ + 1)
 	end
 end
 
 polygonCornerList = {} -- Public list of corner coords for n-gons, will be used for hexagons, octagons, and future polygons.
 -- It should be constructed as a nested list eg. {{x0,y0},{x1,y1},{x2,y2}...}
 
 function constructPolygon() -- Uses polygonCornerList to draw sides between each point
 	if #polygonCornerList == 0 then
 		return false
 	end
 	for i = 1, #polygonCornerList do
 		startX = polygonCornerList[i][1]
 		startY = polygonCornerList[i][2]
 		if i == #polygonCornerList then
 			j = 1
 		else
 			j = i + 1
 		end
 		stopX = polygonCornerList[j][1]
 		stopY = polygonCornerList[j][2]
 		drawLine(stopX, stopY, startX, startY)
 	end
 	return true
 end
 
 function arbitraryPolygon(numberOfSides, Radius) -- Future function, this will eventually replace octagon and hexagon functions
 end
 
 function hexagon(sideLength) -- Fills out polygonCornerList with the points for a hexagon
 	sideLength = sideLength - 1
 	local changeX = sideLength / 2
 	local changeY = round(math.sqrt(3) * changeX, 0)
 	changeX = round(changeX, 0)
 	polygonCornerList[1] = {changeX, 0}
 	polygonCornerList[2] = {(changeX + sideLength), 0}
 	polygonCornerList[3] = {((2 * changeX) + sideLength), changeY}
 	polygonCornerList[4] = {(changeX + sideLength), (2 * changeY)}
 	polygonCornerList[5] = {changeX, (2 * changeY)}
 	polygonCornerList[6] = {0, changeY}
 	if not constructPolygon() then
 		error("This error should never happen.")
 	end
 end
 
 function octagon(sideLength) -- Fills out polygonCornerList with the points for an octagon
 	sideLength = sideLength - 1
 	local change = round((sideLength - 1) / math.sqrt(2), 0)
 	polygonCornerList[1] = {change, 0}
 	polygonCornerList[2] = {(change + sideLength), 0}
 	polygonCornerList[3] = {((2 * change) + sideLength), change}
 	polygonCornerList[4] = {((2 * change) + sideLength), (change + sideLength)}
 	polygonCornerList[5] = {(change + sideLength), ((2 * change) + sideLength)}
 	polygonCornerList[6] = {change, ((2 * change) + sideLength)}
 	polygonCornerList[7] = {0, (change + sideLength)}
 	polygonCornerList[8] = {0, change}
 	if not constructPolygon() then
 		error("This error should never happen.")
 	end
 end
 
 function sixprism(length, height)
 	for i = 1, height do
 		hexagon(length)
 		if i ~= height then
 			navigateTo(positionX, positionY, positionZ + 1)
 		end
 	end
 end
 
 function eightprism(length, height)
 	for i = 1, height do
 		octagon(length)
 		if i ~= height then
 			navigateTo(positionX, positionY, positionZ + 1)
 		end
 	end
 end
 
 -- Previous Progress Resuming, Simulation functions, Command Line, and File Backend
 -- Will check for a "progress" file.
 function CheckForPrevious()
 	if fs.exists(progFileName) then
 		return true
 	else
 		return false
 	end
 end
 
 -- Creates a progress file, containing a serialized table consisting of the shape type, shape input params, and the last known x, y, and z coords of the turtle (beginning of build project)
 function ProgressFileCreate()
 	if not CheckForPrevious() then
 		fs.makeDir(progFileName)
 		return true
 	else
 		return false
 	end
 end
 
 -- Deletes the progress file (at the end of the project, or at beginning if user chooses to delete old progress)
 function ProgressFileDelete()
 	if fs.exists(progFileName) then
 		fs.delete(progFileName)
 		return true
 	else
 		return false
 	end
 end
 
 -- To read the shape params from the file.  Shape type, and input params (e.g. "dome" and radius)
 function ReadShapeParams()
 	-- TODO. Unneeded for now, can just use the table elements directly
 end
 
 function WriteShapeParams(...) -- The ... lets it take any number of arguments and stores it to the table arg{} | This is still unused anywhere
 	local paramTable = arg
 	local paramName = "param"
 	local paramName2 = paramName
 	for i, v in ipairs(paramTable) do -- Iterates through the args passed to the function, ex. paramTable[1] i = 1 so paramName2 should be "param1", tested and works!
 		paramName2 = paramName .. i
 		tempProgTable[paramName2] = v
 		progTable[paramName2] = v
 	end
 end
 
 -- function to write the progress to the file (x, y, z)
 function writeProgress()
 	local progFile
 	local progString = ""
 	if not (sim_mode or cost_only) then
 		progString = textutils.serialize(progTable) -- Put in here to save processing time when in cost_only
 		progFile = fs.open(progFileName, "w")
 		progFile.write(progString)
 		progFile.close()
 	end
 
 end
 
 -- Reads progress from file (shape, x, y, z, facing, blocks, param1, param2, param3)
 function readProgress()
 	local progFile = fs.open(progFileName, "r")
 	local readProgTable = textutils.unserialize(progFile.readAll())
 	progFile.close()
 	return readProgTable
 end
 
 -- compares the progress read from the file to the current sim progress.  needs all four params
 function compareProgress()
 	local progTableIn = progTable
 	local readProgTable = readProgress()
 	if (progTableIn.shape == readProgTable.shape and progTableIn.x == readProgTable.x and progTableIn.y == readProgTable.y and progTableIn.blocks == readProgTable.blocks and progTableIn.facing == readProgTable.facing) then
 		writeOut("All caught up!")
 		return true -- We're caught up!
 	else
 		return false -- Not there yet...
 	end
 end
 
 function getGPSInfo() -- TODO: finish this
 	position = gps.locate()
 	gpsPositionX = position.x
 	gpsPositionZ = position.y
 	gpsPositionY = position.z
 
 end
 
 function setSimFlags(b)
 	sim_mode = b
 	cost_only = b
 	if cmd_line_cost_only then
 		cost_only = true
 	end
 end
 
 function simulationCheck() -- checks state of the simulation
 	if sim_mode then
 		if compareProgress() then
 			setSimFlags(false) -- If we're caught up, un-set flags
 		else
 			setSimFlags(true)  -- If not caught up, just re-affirm that the flags are set
 		end
 	end
 end
 
 function continueQuery()
 	if cmd_line_resume then
 		 return true
 	else
 		 if not cmd_line then
 			 writeOut("Do you want to continue the last job?")
 			 local yes = io.read()
 			 if yes == "y" then
 				 return true
 			 else
 				 return false
 			 end
 		 end
 	end
 end
 
 function progressUpdate()  -- This ONLY updates the local table variable.  Writing is handled above. -- I want to change this to allow for any number of params
 	progTable = {shape = choice, enderchest_refilling = tempProgTable.enderchest_refilling, param1 = tempProgTable.param1, param2 = tempProgTable.param2, param3 = tempProgTable.param3, param4 = tempProgTable.param4, x = positionX, y = positionY, z = positionZ, facing = facing, blocks = blocks}
 	if not sim_mode then
 		writeProgress()
 	end
 end
 
  -- Command Line
 function checkCommandLine() --True if arguments were passed
 	if #argTable > 0 then
 		cmd_line = true
 		return true
 	else
 		cmd_line = false
 		return false
 	end
 end
 
 function needsHelp() -- True if -h is passed
 	for i, v in pairs(argTable) do
 		if v == "-h" or v == "-help" or v == "--help" then
 			return true
 		else
 			return false
 		end
 	end
 end
 
 function setFlagsFromCommandLine() -- Sets count_only, chain_next_shape, and sim_mode
 	for i, v in pairs(argTable) do
 		if v == "-c" or v == "-cost" or v == "--cost" then
 			cost_only = true
 			cmd_line_cost_only = true
 			writeOut("Cost Only Mode")
 		end
 		if v == "-z" or v == "-chain" or v == "--chain" then
 			chain_next_shape = true
 			writeOut("Chained Shape Mode")
 		end
 		if v == "-r" or v == "-resume" or v == "--resume" then
 			cmd_line_resume = true
 			writeOut("Resuming")
 		end
 		if v == "-e" or v == "-ender" or v == "--ender" then
 			enderchest_refilling = true
 			tempProgTable.enderchest_refilling = true
 			writeOut("Enderchest Mode")
 		end
 		if v == "-g" or v == "-home" or v == "--home" then
 			return_to_home = true
 			writeOut("Will return home")
 		end
 	end
 end
 
 function setTableFromCommandLine() -- Sets progTable and tempProgTable from command line arguments
 	progTable.shape = argTable[1]
 	tempProgTable.shape = argTable[1]
 	local paramName = "param"
 	local paramName2 = paramName
 	for i = 2, #argTable do
 		local addOn = tostring(i - 1)
 		paramName2 = paramName .. addOn
 		progTable[paramName2] = argTable[i]
 		tempProgTable[paramName2] = argTable[i]
 	end
 end
 
 -- Menu, Drawing and Main functions
 
 function choiceIsValidShape(choice)
 	local validShapes = {"rectangle", "square", "line", "wall", "platform", "stair", "stairs", "cuboid", "1/2-sphere", "1/2 sphere", "dome", "bowl", "sphere", "circle", "cylinder", "pyramid", "hexagon", "octagon", "6-prism", "6 prism", "8-prism", "8 prism"}
 	for i = 1, #validShapes do
 		if choice == validShapes[i] then
 			return true
 		end
 	end
 	return false
 end
 
 function choiceFunction()
 	if sim_mode == false and cmd_line == false then -- If we are NOT resuming progress
 		local page = 1
 		choice = io.read()
 		choice = string.lower(choice) -- All checks are aginst lower case words so this is to ensure that
 		while ((choice == "next") or (choice == "back")) do
 			if (choice == "next") then
 				if page == 1 then
 					writeMenu2()
 					page = 2
 				else
 					writeMenu()
 					page = 1
 				end
 			end
 			if (choice == "back") then
 				if page == 1 then
 					writeMenu2()
 					page = 2
 				else
 					writeMenu()
 					page = 1
 				end
 			end
 			choice = io.read()
 			choice = string.lower(choice) -- All checks are aginst lower case words so this is to ensure that
 		end
 		if choice == "end" or choice == "exit" then
 			writeOut("Goodbye.")
 			return
 		end
 		if choice == "help" then
 			getHelp()
 			return
 		end
 		if choice == "credits" then
 			showCredits()
 			return
 		end
 		tempProgTable = {shape = choice}
 		progTable = {shape = choice}
 		if not choiceIsValidShape(choice) then
 			writeOut(choice ..  " is not a valid shape choice.")
 			return
 		end
 		writeOut("Building a "..choice)
 		local yes = getInput("string","Want to just calculate the cost?","y","n")
 		if yes == 'y' then
 			cost_only = true
 		end
 		local yes = getInput("string","Want turtle to return to start after build?","y","n")
 		if yes == 'y' then
 			return_to_home = true
 		end
 		local yes = getInput("string","Want the turtle to refill from enderchest (slot 16)?","y","n")
 		if yes == 'y' then
 			enderchest_refilling = true
 			tempProgTable.enderchest_refilling = true
 		end
 	elseif sim_mode == true then -- If we ARE resuming progress
 		tempProgTable = readProgress()
 		choice = tempProgTable.shape
 		choice = string.lower(choice) -- All checks are aginst lower case words so this is to ensure that
 		enderchest_refilling =  tempProgTable.enderchest_refilling
 	elseif cmd_line == true then -- If running from command line
 		if needsHelp() then
 			showCmdLineHelp()
 			return
 		end
 		choice = tempProgTable.shape
 		choice = string.lower(choice) -- All checks are aginst lower case words so this is to ensure that
 		enderchest_refilling =  tempProgTable.enderchest_refilling
 		writeOut("Building a "..choice)
 	end
 	if not cost_only then
 		turtle.select(1)
 		activeSlot = 1
 		if turtle.getItemCount(activeSlot) == 0 then
 			if resupply then
 				writeOut("Please put building blocks in the first slot.")
 			else
 				writeOut("Please put building blocks in the first slot (and more if you need them)")
 			end
 			while turtle.getItemCount(activeSlot) <= 1 do
 				os.sleep(.1)
 			end
 		end
 	else
 		activeSlot = 1
 	end
 	-- Shape selection if cascade
 	-- Line based shapes
 	if choice == "rectangle" then
 		local depth = 0
 		local width = 0
 		if sim_mode == false and cmd_line == false then
 			width = getInput("int","How wide does it need to be?")
 			depth = getInput("int","How deep does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			width = tempProgTable.param1
 			depth = tempProgTable.param2
 		end
 		tempProgTable.param1 = width
 		tempProgTable.param2 = depth
 		progTable = {param1 = width, param2 = depth} -- THIS is here because we NEED to update the local table!
 		rectangle(width, depth)
 	end
 	if choice == "square" then
 		local sideLength
 		if sim_mode == false and cmd_line == false then
 			sideLength = getInput("int","How long does each side need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			sideLength = tempProgTable.param1
 		end
 		tempProgTable.param1 = sideLength
 		progTable = {param1 = sideLength}
 		square(sideLength)
 	end
 	if choice == "line" then
 		local startX = 0
 		local startY = 0
 		local endX = 0
 		local endY = 0
 		if sim_mode == false and cmd_line == false then
 			writeOut("Note that the turtle's starting position is 0, 0.")
 			startX = getInput("int","Where does the start X need to be?")
 			startY = getInput("int","Where does the start Y need to be?")
 			endX = getInput("int","Where does the end X need to be?")
 			endY = getInput("int","Where does the end Y need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			startX = tempProgTable.param1
 			startY = tempProgTable.param2
 			endX = tempProgTable.param3
 			endY = tempProgTable.param4
 		end
 		tempProgTable.param1 = startX
 		tempProgTable.param2 = startY
 		tempProgTable.param3 = endX
 		tempProgTable.param4 = endY
 		progTable = {param1 = startX, param2 = startY, param3 = endX, param4 = endY}
 		drawLine(endX, endY, startX, startY)
 	end
 	if choice == "wall" then
 		local depth = 0
 		local height = 0
 		if sim_mode == false and cmd_line == false then
 			depth = getInput("int","How deep does it need to be?")
 			height = getInput("int","How high does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			depth = tempProgTable.param1
 			height = tempProgTable.param2
 		end
 		tempProgTable.param1 = depth
 		tempProgTable.param2 = height
 		progTable = {param1 = depth, param2 = height}
 		wall(depth, height)
 	end
 	if choice == "platform" then
 		local width = 0
 		local depth = 0
 		if sim_mode == false and cmd_line == false then
 			width = getInput("int","How wide does it need to be?")
 			depth = getInput("int","How deep does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			width = tempProgTable.param1
 			depth = tempProgTable.param2
 		end
 		tempProgTable.param1 = width
 		tempProgTable.param2 = depth
 		progTable = {param1 = width, param2 = depth}
 		platform(width, depth)
 	end
 	if choice == "stair" or choice == "stairs" then
 		local width = 0
 		local height = 0
 		if sim_mode == false and cmd_line == false then
 			width = getInput("int","How wide does it need to be?")
 			height = getInput("int","How high does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			width = tempProgTable.param1
 			height = tempProgTable.param2
 		end
 		tempProgTable.param1 = width
 		tempProgTable.param2 = height
 		progTable = {param1 = width, param2 = height}
 		stair(width, height)
 		special_chain = true
 	end
 	if choice == "cuboid" then
 		local width = 0
 		local depth = 0
 		local height = 0
 		local hollow = ""
 		if sim_mode == false and cmd_line == false then
 			width = getInput("int","How wide does it need to be?")
 			depth = getInput("int","How deep does it need to be?")
 			height = getInput("int","How high does it need to be?")
 			hollow = getInput("string","Does it need to be hollow?","y","n")
 		elseif sim_mode == true or cmd_line == true then
 			width = tempProgTable.param1
 			depth = tempProgTable.param2
 			height = tempProgTable.param3
 			hollow = tempProgTable.param4
 		end
 		tempProgTable.param1 = width
 		tempProgTable.param2 = depth
 		tempProgTable.param3 = height
 		tempProgTable.param4 = hollow
 		progTable = {param1 = width, param2 = depth, param3 = height}
 		cuboid(width, depth, height, hollow)
 	end
 	if choice == "pyramid" then
 		local length = 0
 		local hollow = ""
 		if sim_mode == false and cmd_line == false then
 			length = getInput("int","How long does each side of the base layer need to be?")
 			hollow = getInput("string","Does it need to be hollow?","y","n")
 		elseif sim_mode == true or cmd_line == true then
 			length = tempProgTable.param1
 			hollow = tempProgTable.param2
 		end
 		tempProgTable.param1 = length
 		tempProgTable.param2 = hollow
 		progTable = {param1 = length, param2 = hollow}
 		pyramid(length, hollow)
 	end
 	-- Circle based shapes
 	if choice == "1/2-sphere" or choice == "1/2 sphere" then
 		local diameter = 0
 		local half = ""
 		if sim_mode == false and cmd_line == false then
 			diameter = getInput("int","What diameter does it need to be?")
 			half = getInput("string","What half of the sphere does it need to be?","bottom","top")
 		elseif sim_mode == true or cmd_line == true then
 			diameter = tempProgTable.param1
 			half = tempProgTable.param2
 		end
 		tempProgTable.param1 = diameter
 		tempProgTable.param2 = half
 		progTable = {param1 = diameter, param2 = half}
 		if half == "bottom" then
 			dome("bowl", diameter)
 		elseif half == "top" then
 			dome("dome", diameter)
 		end
 	end
 	if choice == "dome" then
 		local diameter = 0
 		if sim_mode == false and cmd_line == false then
 			diameter = getInput("int","What diameter does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			diameter = tempProgTable.param1
 		end
 		tempProgTable.param1 = diameter
 		progTable = {param1 = diameter}
 		dome("dome", diameter)
 	end
 	if choice == "bowl" then
 		local diameter = 0
 		if sim_mode == false and cmd_line == false then
 			diameter = getInput("int","What diameter does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			diameter = tempProgTable.param1
 		end
 		tempProgTable.param1 = diameter
 		progTable = {param1 = diameter}
 		dome("bowl", diameter)
 	end
 	if choice == "sphere" then
 		local diameter = 0
 		if sim_mode == false and cmd_line == false then
 			diameter = getInput("int","What diameter does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			diameter = tempProgTable.param1
 		end
 		tempProgTable.param1 = diameter
 		progTable = {param1 = diameter}
 		dome("sphere", diameter)
 	end
 	if choice == "circle" then
 		local diameter = 0
 		if sim_mode == false and cmd_line == false then
 			diameter = getInput("int","What diameter does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			diameter = tempProgTable.param1
 		end
 		tempProgTable.param1 = diameter
 		progTable = {param1 = diameter}
 		circle(diameter)
 	end
 	if choice == "cylinder" then
 		local diameter = 0
 		local height = 0
 		if sim_mode == false and cmd_line == false then
 			diameter = getInput("int","What diameter does it need to be?")
 			height = getInput("int","How high does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			diameter = tempProgTable.param1
 			height = tempProgTable.param2
 		end
 		tempProgTable.param1 = diameter
 		tempProgTable.param2 = height
 		progTable = {param1 = diameter, param2 = height}
 		cylinder(diameter, height)
 	end
 	-- Polygon shapes
 	if choice == "hexagon" then
 		local length = 0
 		if sim_mode == false and cmd_line == false then
 			length = getInput("int","How long does each side need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			length = tempProgTable.param1
 		end
 		tempProgTable.param1 = length
 		progTable = {param1 = length}
 		hexagon(length)
 	end
 	if choice == "octagon" then
 		local length = 0
 		if sim_mode == false and cmd_line == false then
 			length = getInput("int","How long does each side need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			length = tempProgTable.param1
 		end
 		tempProgTable.param1 = length
 		progTable = {param1 = length}
 		octagon(length)
 	end
 	if choice == "6-prism" or choice == "6 prism" then
 		local length = 0
 		local height = 0
 		if sim_mode == false and cmd_line == false then
 			length = getInput("int","How long does each side need to be?")
 			height = getInput("int","How high does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			length = tempProgTable.param1
 			height = tempProgTable.param2
 		end
 		tempProgTable.param1 = length
 		tempProgTable.param2 = height
 		progTable = {param1 = length, param2 = height}
 		sixprism(length, height)
 	end
 	if choice == "8-prism" or choice == "8 prism" then
 		local length = 0
 		local height = 0
 		if sim_mode == false and cmd_line == false then
 			length = getInput("int","How long does each side need to be?")
 			height = getInput("int","How high does it need to be?")
 		elseif sim_mode == true or cmd_line == true then
 			length = tempProgTable.param1
 			height = tempProgTable.param2
 		end
 		tempProgTable.param1 = length
 		tempProgTable.param2 = height
 		progTable = {param1 = length, param2 = height}
 		eightprism(length, height)
 	end
 	if return_to_home then
 		goHome() -- After all shape building has finished
 	end
 	writeOut("Done") -- Saves a few lines when put here rather than in each if statement
 end
 
 function writeMenu()
 	term.clear()
 	term.setCursorPos(1, 1)
 	writeOut("Shape Maker 1.7 by Keridos/CupricWolf/pokemane")
 	if resupply then					-- Any ideas to make this more compact/better looking (in terms of code)?
 		writeOut("Resupply Mode Active")
 	elseif (resupply and can_use_gps) then
 		writeOut("Resupply and GPS Mode Active")
 	elseif can_use_gps then
 		writeOut("GPS Mode Active")
 	else
 		writeOut("Standard Mode Active")
 	end
 	if not cmd_line then
 		writeOut("What shape do you want to build? [page 1/2]");
 		writeOut("next for page 2")
 		writeOut("+---------+-----------+-------+-------+")
 		writeOut("| square  | rectangle | wall  | line  |")
 		writeOut("| cylinder| platform  | stair | cuboid|")
 		writeOut("| pyramid | 1/2-sphere| sphere| circle|")
 		writeOut("+---------+-----------+-------+-------+")
 		writeOut("")
 	end
 end
 
 function writeMenu2()
 	term.clear()
 	term.setCursorPos(1, 1)
 	writeOut("Shape Maker 1.7 by Keridos/CupricWolf/pokemane")
 	if resupply then					-- Any ideas to make this more compact/better looking (in terms of code)?
 		writeOut("Resupply Mode Active")
 	elseif (resupply and can_use_gps) then
 		writeOut("Resupply and GPS Mode Active")
 	elseif can_use_gps then
 		writeOut("GPS Mode Active")
 	else
 		writeOut("Standard Mode Active")
 	end
 	writeOut("What shape do you want to build? [page 2/2]");
 	writeOut("back for page 1")
 	writeOut("+---------+-----------+-------+-------+")
 	writeOut("| hexagon | octagon   | dome  |       |")
 	writeOut("| 6-prism | 8-prism   | bowl  |       |")
 	writeOut("| help    | credits   | end   |       |")
 	writeOut("+---------+-----------+-------+-------+")
 	writeOut("")
 end
 
 function showCmdLineHelp()
 	term.clear()
 	term.setCursorPos(1, 1)
 	writeOut("Command line help")
 	writeOut("Usage: shape [shape-type] [param1] [param2] [param3] [param4] [-c] [-h] [-z] [-r]\n")
 	writeOut("-c or -cost or --cost: Activate cost only mode\n")
 	writeOut("-h or -help or --help: Show this information")
 	io.read()
 	writeOut("-z or -chain or --chain: Lets you chain together multiple shapes\n")
 	writeOut("-g or -home or --home: Make turtle go 'home' after build\n")
 	writeOut("-r or -resume or --resume: Resume the last build if possible")
 	io.read()
 	writeOut("-e or -ender or --ender: Activate enderchest refilling\n")
 	writeOut("shape-type can be any of the shapes in the menu\n")
 	writeOut("After shape-type input all of the paramaters for the shape, varies by shape\n")
 	writeOut("Put any flags (-c, -h, etc.) at the end of your command")
 end
 
 function getHelp()
 	term.clear()
 	term.setCursorPos(1, 1)
 	writeOut("Width is to the right of the turtle. (X-Axis)")
 	writeOut("Depth is to the front of the turtle. (Y-Axis)")
 	writeOut("Height is to the top of the turtle. (Z-Axis)")
 	writeOut("Length is the side length of some shapes. (Squares and Polygons)")
 	io.read()
 	term.clear()
 	term.setCursorPos(1, 1)
 	local page = 1
 	writeOut("What shape do you want help with? [page 1/2]");
 	writeOut("next for page 2")
 	writeOut("+---------+-----------+-------+-------+")
 	writeOut("| square  | rectangle | wall  | line  |")
 	writeOut("| cylinder| platform  | stair | cuboid|")
 	writeOut("| pyramid | 1/2-sphere| sphere| circle|")
 	writeOut("+---------+-----------+-------+-------+")
 	writeOut("")
 	choice = io.read()
 	choice = string.lower(choice)
 	while ((choice == "next") or (choice == "back")) do
 		if (choice == "next") then
 			if (page == 1) then
 				page = 2
 				term.clear()
 				term.setCursorPos(1, 1)
 				writeOut("What shape do you want help wih? [page 2/2]?");
 				writeOut("back for page 1")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("| hexagon | octagon   | dome  |       |")
 				writeOut("| 6-prism | 8-prism   | bowl  |       |")
 				writeOut("|         |           |       |       |")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("")
 			else
 				page = 1
 				term.clear()
 				term.setCursorPos(1, 1)
 				writeOut("What shape do you want help with? [page 1/2]");
 				writeOut("next for page 2")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("| square  | rectangle | wall  | line  |")
 				writeOut("| cylinder| platform  | stair | cuboid|")
 				writeOut("| pyramid | 1/2-sphere| sphere| circle|")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("")
 			end
 		end
 		if (choice == "back") then
 			if (page == 1) then
 				page = 2
 				term.clear()
 				term.setCursorPos(1, 1)
 				writeOut("What shape do you want help wih? [page 2/2]?");
 				writeOut("back for page 1")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("| hexagon | octagon   | dome  |       |")
 				writeOut("| 6-prism | 8-prism   | bowl  |       |")
 				writeOut("|         |           |       |       |")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("")
 			else
 				page = 1
 				term.clear()
 				term.setCursorPos(1, 1)
 				writeOut("What shape do you want help with? [page 1/2]");
 				writeOut("next for page 2")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("| square  | rectangle | wall  | line  |")
 				writeOut("| cylinder| platform  | stair | cuboid|")
 				writeOut("| pyramid | 1/2-sphere| sphere| circle|")
 				writeOut("+---------+-----------+-------+-------+")
 				writeOut("")
 			end
 		end
 		choice = io.read()
 		choice = string.lower(choice)
 	end
 	if not choiceIsValidShape(choice) then
 		writeOut(choice ..  " is not a valid shape choice.")
 		return
 	end
 	-- If cascade time!
 	if choice == "rectangle" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The rectangle is a perimiter of width by depth. Use platform if you want a filled in rectangle. The rectangle takes two parameters (two integers) Width then Depth.")
 	end
 	if choice == "square" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The square is a perimiter of length by length. Use platform if you want a filled in square. The square takes one parameter (one integer) Length.")
 	end
 	if choice == "line" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The line is drawn between the start and end points given. The turtle's initial position is 0, 0 so that must by taken into account. The line takes four parameters (four integers) Start X then Start Y then End X then End Y.")
 	end
 	if choice == "wall" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The wall is a vertical plane. The wall takes two parameters (two integers) Depth then Height.")
 	end
 	if choice == "platform" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The platform is a horizontal plane of width by depth. Use rectangle or square if you want just a perimeter. The platform takes two parameters (two integers) Width then Depth.")
 	end
 	if choice == "stair" or choice == "stairs" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The stair or stairs are an incline of width by height. The stair takes two parameters (two integers) Width then Height.")
 	end
 	if choice == "cuboid" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The cuboid is a rectangular prism of width by depth by height. The hollow parameter determines if the shape is solid or like a rectangular tube. The cuboid takes four parameters (three intergers and one y/n) Width then Depth then Height then Hollow(y/n).")
 	end
 	if choice == "1/2-sphere" or choice == "1/2 sphere" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The half sphere is the top or bottom half of a sphere. The half parameter determines of the top or bottom half of the sphere built. The half sphere takes two parameters (one integer and one top/bottom) Diameter then half(top/bottom).")
 	end
 	if choice == "dome" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The dome shape is a shortcut to the top half sphere. The dome takes one parameter (one integer) Diameter.")
 	end
 	if choice == "bowl" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The bowl shape is a shortcut to the bottom half sphere. The bowl takes one parameter (one integer) Diameter.")
 	end
 	if choice == "sphere" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The sphere is just that, a sphere. It is hollow. The sphere takes one parameter (one integer) Diameter.")
 	end
 	if choice == "circle" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The circle is just that, a circle. It is just a perimeter. The circle takes one parameter (one integer) Diameter.")
 	end
 	if choice == "cylinder" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The cylinder is a cylindrical tube of diameter by height. The cylinder takes two parameters (two integers) Diameter then Height.")
 	end
 	if choice == "pyramid" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The pyramid is a four sided pyramid with base length by length. The hollow parameter determines if the inside is filled. The pyramid takes two parameters (one integer and one y/n) Base Length then Hollow(y/n).")
 	end
 	if choice == "hexagon" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The hexagon is a hexagonal perimeter. The hexagon takes one parameter (one integer) Length.")
 	end
 	if choice == "octagon" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The octagon is and octagonal perimeter. The octagon takes one parameter (one integer) Length.")
 	end
 	if choice == "6-prism" or choice == "6 prism" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The 6 prism is a hexagonal prism shaped tube. The 6 prism takes two parameters (two integers) Length then Height.")
 	end
 	if choice == "8-prism" or choice == "8 prism" then
 		term.clear()
 		term.setCursorPos(1, 1)
 		writeOut("The 8 prism is an octagonal prism shaped tube. The 8 prism takes two parameters (two integers) Length then Height.")
 	end
 end
 
 function showCredits()
 	term.clear()
 	term.setCursorPos(1, 1)
 	writeOut("Credits for the shape builder:")
 	writeOut("Based on work by Michiel, Vliekkie, and Aeolun")
 	writeOut("Sphere/dome code by IMarvinTPA")
 	writeOut("Additional improvements by Keridos, CupricWolf, and pokemane")
 end
 
 function main()
 	if wrapModules()=="resupply" then
 		linkToRSStation()
 	end
 	if checkCommandLine() then
 		if needsHelp() then
 			showCmdLineHelp()
 			return -- Close the program after help info is shown
 		end
 		setFlagsFromCommandLine()
 		setTableFromCommandLine()
 	end
 	if (CheckForPrevious()) then  -- Will check to see if there was a previous job and gps is enabled, and if so, ask if the user would like to re-initialize to current progress status
 		if not continueQuery() then -- If the user doesn't want to continue
 			ProgressFileDelete()
 			setSimFlags(false) -- Just to be safe
 			writeMenu()
 			choiceFunction()
 		else	-- If the user wants to continue
 			setSimFlags(true)
 			choiceFunction()
 		end
 	else
 		setSimFlags(false)
 		writeMenu()
 		choiceFunction()
 	end
 	if (blocks ~= 0) and (fuel ~= 0) then -- Do not show on help or credits page or when selecting end
 		writeOut("Blocks used: " .. blocks)
 		writeOut("Fuel used: " .. fuel)
 	end
 	ProgressFileDelete() -- Removes file upon successful completion of a job, or completion of a previous job.
 	progTable = {}
 	tempProgTable = {}
 end
 
 main()