Windmill Placer v1.1

--
--      Windmill Placer v1.1 by Joseph Jones
--
--      Instructions found at: http://www.computercraft.info/forums2/index.php?/topic/13824-windmill-placer/
--
--
--      Needs 420 cables.   Uses slots 1-14
--      Needs 60 windmills. Uses slot 15
--      Needs 960 fuel.     Uses slot 16
--
--
--      ChangeLog:
--          June 29, 2013: [v1.0] Finished initial release
--          July  5, 2013: [v1.1] Added user control to number of sections that go up at a time.
--


local currWireSlot = 1


--Checks the number of wires in curr slot and changes if 0
function checkWireCountInSlot()
    --Checks the slot with wires to see if there are wires
    while(turtle.getItemCount(currWireSlot)==0) do
        currWireSlot = currWireSlot + 1

        --checks to make sure there are wires in the inventory
        if(currWireSlot==15) then
            print("There is not enough cable.")
            print("Press enter to continue.")
            io.read()
            currWireSlot=1
        end

        turtle.select(currWireSlot)
    end
end


function forwardPlaceCable()
    checkWireCountInSlot()
    while (turtle.forward()==false) do end
    turtle.placeDown()
end


function placeWindmill()
    while (turtle.up()==false) do end
    checkWireCountInSlot()
    turtle.placeDown()

    while (turtle.up()==false) do end
    checkWireCountInSlot()
    turtle.placeDown()

    while (turtle.up()==false) do end
    turtle.select(15)
    --checks to make sure there are windmills in the inventory
    while(turtle.getItemCount(15)==0) do
        print("There is not enough windmills in slot 15.")
        print("Press enter to continue.")
        io.read()
    end
    turtle.placeDown()

    turtle.select(currWireSlot)


end


function placeWings(numOfWindMills)
    local temp = numOfWindMills - 1
    temp = temp * 5

    while(temp>0) do
        forwardPlaceCable()
        temp = temp - 1
    end

    temp = numOfWindMills - 1
    placeWindmill()
    while(temp>0) do
        if(temp>0) then
            while (turtle.back()==false) do end
            while (turtle.down()==false) do end
            while (turtle.down()==false) do end
            while (turtle.down()==false) do end
        end

        local temp2 = 4
        while(temp2>0) do
            while (turtle.back()==false) do end
            temp2 = temp2 - 1
        end

        placeWindmill()
        temp = temp - 1
    end

    turtle.turnRight()
    while (turtle.forward()==false) do end
    while (turtle.down()==false) do end
    while (turtle.down()==false) do end
    while (turtle.down()==false) do end

end


--obtains 960 fuel at the beginning of the program
function fuel(numOfSections)
    turtle.select(16)
    while(turtle.getFuelLevel() < 240*numOfSections) do
        if(turtle.refuel(1)==false) then
            print("Turtle needs more fuel in slot 16. Press enter to continue")
            io.read()
        end
    end

end

local args = { ... }
--Main program
function main()
    local currSide = 4

    if(#args == 1) then
        currSide = tonumber(args[1])
        while(currSide<0 or currSide > 4) do
            print("There are up to 4 sections.")
            print("How many do you want (0-4)?")
            currSide = tonumber(io.read())
        end
    end

    fuel(currSide)
    turtle.select(currWireSlot)


    while(currSide > 0) do
        local temp = 25
        while(temp>0) do
            forwardPlaceCable()
            temp = temp - 1
        end

        temp = 1
        turtle.turnRight()
        while(temp<6) do
            placeWings(temp)
            temp = temp + 1
            while (turtle.forward()==false) do end
            while (turtle.forward()==false) do end
            while (turtle.forward()==false) do end
            while (turtle.forward()==false) do end
            turtle.turnLeft()
        end
        currSide = currSide-1
    end
end

main()