Tower Builder

tArgs = {...}




local length, height, width
if #tArgs ~= 3 then
    print("Invalid number of arguments. Needs length, width, height")
else
    length = tonumber(tArgs[1])
    width = tonumber(tArgs[2])
    height = tonumber(tArgs[3])
end


term.clear()
mt = {}
count = 1

function look(y,x)
    mt[count] = turtle.detectDown()
end

function place(y,x)

    while turtle.getItemCount(1) == 1 do
        res.resupply(1)
        sleep(5)
    end

    if mt[count] then
        turtle.placeDown()
    end
end

function scan()
    for y = 1,width do
        for xx = 1,length-1 do
            x = xx
            if y%2 == 0 then
                x = length - xx
            end
            look(y,x)
            forward()
        end
        if y < width then
            if y%2 ~= 0 then
                turtle.turnRight()
                look(y,length)
                forward()
                turtle.turnRight()
            else
                turtle.turnLeft()
                look(y,1)
                forward()
                turtle.turnLeft()
            end

        end
    end
end


function fill()
    for z = 1,height do
    count = 1
        for y = 1,width do
            for xx = 1,length-1 do
                x = xx
                if y%2 == 0 then
                    x = length - xx
                end
                place(y,x)
                forward()
            end
            if y < width then
                if y%2 ~= 0 then
                    turtle.turnRight()
                    place(y,length)
                    forward()
                    turtle.turnRight()
                else
                    turtle.turnLeft()
                    place(y,1)
                    forward()
                    turtle.turnLeft()
                end

            end
        end
        turtle.up()
        returnToStart()
    end
end

function returnToStart()
    if width%2 ~= 0 then
        turtle.turnRight()
        turtle.turnRight()
        for x = 1,length-1 do
         forward()
        end
    end
    turtle.turnRight()
    for y = 1,width-1 do
         forward()
    end
    turtle.turnRight()
end

function forward()

   while turtle.getFuelLevel() < 100 do
    turtle.select(2)
    turtle.refuel(63)
    res.resupply(2)
    turtle.select(1)
    sleep(5)
   end

   while not turtle.forward() do sleep(0.5) end
   count = count + 1

end

write("Establishing link to resupply module... ")
res = peripheral.wrap("left")
res.link()
print("Done")

write("Scanning pattern...")
scan()
print("Done")

print("Placing blocks")
returnToStart()
turtle.up()
fill()

for i = 1,height+1 do turtle.down() end

term.setCursorPos(0,length+2)