harvestTree03

--[[
    harvestTree03.lua
    http://pastebin.com/UMkQ8uiY
    Turtle needs to move around and find more trees
    Suggested pattern explore a 10 x 10 square, with
    starting tree at the lower left side

]]--
function refuel()
    --use wood to refuel if needed
    if turtle.getFuelLevel() < 15 then
        turtle.craft()   -- craft wood to planks(1 wood, 1 planks = 15 fuel)
        turtle.refuel()  -- add 4 x 15 fuel
    end
end

function harvestTree()
    turtle.dig()       -- dig base of tree
    refuel()
    turtle.forward() -- go under tree
    -- Loop to climb up tree and harvest trunk and surrounding leaves
    while turtle.detectUp() do -- continue loop while block detected above
        turtle.digUp() -- Dig block above
        turtle.up()    -- Move up
        -- Inner loop to check for leaves
        for i = 1, 4 do
            if turtle.detect() then -- check if leaves in front
                turtle.dig() --Dig leaves
            end
            turtle.turnRight()
        end
    end
    -- At top of the tree. New loop to return to ground
    while not turtle.detectDown() do -- While nothing detected below
        turtle.down() -- Go down
    end
end

function lookForTrees()
    --[[ Try to move forward 10 squares.
            - make sure on solid ground
            - If wood in front harvest tree.
            - else if leaves in front dig then move
            - else any other block climb up and over
    ]]--
    -- move 10 squares forward, move to next column and return
    -- repeat 5 x
    for i = 1, 5 do
        refuel()       -- check if fuel needed
        harvestRun(10) -- move 10 blocks
        turtle.turnRight()
        harvestRun(1)
        turtle.turnRight() --now facing opposite direction
        harvestRun(10) -- move 10 blocks
        if i < 5 then -- turn left if not on last run
            turtle.turnLeft()
            harvestRun(1)
            turtle.turnLeft()
        end
    end
    --return to starting position
    turtle.turnRight()
    harvestRun(10)
    turtle.turnRight()
end

function harvestRun(runLength)
    local success = false
    local data = {} --initialise empty table variable

    --[[
    turtle.inspect() returns two values
    1) boolean (true/false) success
    2) table with two values:
        .name (string) e.g. "minecraft:log"
        .metadata (integer) e.g. 0
        oak has metadata of 0, spruce 1, birch 2 etc
    ]]--
    for i = 1, runLength do
        while not turtle.inspectDown() do -- must be air below
            turtle.down()
        end
        if not turtle.forward() then --can't move forward
            success, data = turtle.inspect() -- store information about the block in front in a table
            if success then
                if data.name == "minecraft:log" then -- tree in front, so harvest it
                    harvestTree()
                -- check if leaves or grass in front, dig through
                elseif data.name == "minecraft:leaves" or data.name == "minecraft:tallgrass"
                    or data.name == "minecraft:double_plant" then
                    turtle.dig()
                    turtle.forward()
                else -- some other solid block so climb up and over it
                    while turtle.detect() do
                        turtle.digUp() -- in case any blocks above
                        turtle.up()
                    end
                    turtle.forward()
                end
            end
        end
    end
end

function main()
    os.sleep(2)    -- pause for 2 secs to allow time to press esc
    harvestTree()  -- Call the harvestTree function
    lookForTrees() -- Find more trees
end

--*********************Program runs from here*****************
main()