treeCutting

--[[ Running this script on a turtle with saplings in slot 1, bone-meal in slot 2 and coal in slot 16 and a chest behind the turtle for the wood drop off point will create an automatic tree farm. combining this with a chest to the left of the turtle for sapling replenishment and chest to the right for coal replenishment (or bone meal if boneMealRight = true) will ensure a long running automated process.  If you put a Glasses Bridge from OpenPeripherals underneath the turtle, it will keep you updated on the turtle's status.]]

g = peripheral.wrap("bottom")
glasses = false
logs = 0
boneMealRight = true

-- This function lays saplings and applies bone-meal
function plant()
    turtle.select(1)                --selects sapling
    turtle.place()                  --places sapling
    turtle.select(2)                --selects bone-meal
    turtle.place()
    turtle.place()
    turtle.place()                  --fertilizes sapling x3
    turtle.suck()                   --picks up any saplings that have fallen
end

-- This function checks fuel level and refuels
function fuel()
    if turtle.getFuelLevel() < 50 then      --checks fuel level and refuels
        turtle.select(16)
        turtle.refuel(5)
    end
        remaining = turtle.getFuelLevel()
    print("Fuel remaining: "..remaining)    --displays fuel level to user
        if glasses then
          fuel.setText("Fuel remaining: "..remaining.." blocks")
        end
end

-- This function cuts a column directly above the turtle and then returns to ground level
function column()
    while turtle.detectUp() == true do      --cut tree down
        turtle.digUp()
                logs = logs + 1
                mined.setText("Logs mined: "..logs)
        turtle.up()
        turtle.suck()               --picks up any saplings that have fallen
    end
    while turtle.detectDown() == false do       -- return to ground level
        turtle.down()
        turtle.suck()               --picks up any saplings that have fallen
    end
end

-- This function moves from start position, runs column and returns to start position
function fell()
    turtle.dig()                    --breaks bottom block of tree
        logs = logs + 1
        mined.setText("Logs mined: "..logs)
    turtle.forward()                --move into gap
    column()                    --run column function
    turtle.turnRight()              --return to start
    turtle.turnRight()
    turtle.forward()
end

-- This function empties all collected wood into chest, checks sapling and fuel supplies and restocks
function empty()
    for j = 3, 15 do                -- empty slots 3 to 15 into chest
        turtle.select(j)
        turtle.drop()
    end
    turtle.turnLeft()
    if turtle.getItemCount(16) < 5 then     -- replenish fuel stocks
        if boneMealRight == false then
            turtle.select(16)
                else
                        turtle.select(2)
                end
        turtle.suck(10)
    end
    turtle.turnLeft()
    if turtle.getItemCount(1) < 5 then      --replenish sapling stocks
        turtle.turnLeft()
        turtle.select(1)
        turtle.suck()
        turtle.turnRight()
    end
end

-- This function checks to see if the sapling has been fertilized into a full tree
function compare()
    turtle.select(1)
    if turtle.compare() == true then
        return true -- false could indicate that there is no bonemeal or saplings
    else
        return false
    end
end

-- This block triggers the appropriate functions in the correct order.
if g then
  print("Running Terminal Glasses mode")
  glasses = true
  g.clear()
  fuel = g.addText(1, 1, "Fuel remaining: ", 0xFFFFFF)
  mined = g.addText(1, 10, "Logs mined: ", 0xFFFFFF)
end
repeat                          --start loop
    fuel()                      --check fuel
    plant()                     --plant and fertilize tree
    fuel()                      --check fuel again
    if compare() == false then          --if tree has grown cut down tree
        fell()
    else                        --if tree hasn't grown display error
        print("error")
        repeat
            sleep(1)
            turtle.select(2)
        until turtle.getItemCount() > 20    --this will terminate script
    end
    empty()                     --empty harvest and restock fuel and materials
until 1 > 2                     -- always false creating infinite loop