cave

--pastebin:Sg9BVwcS

local tArgs = { ... }

os.loadAPI("movement")

local m = movement

local torchDist = 6

if #tArgs ~= 3 then
    print("Usage: cave <width> <height> <length>")
    print("Slot 1: floor")
    print("Slot 2: ceiling")
    print("Slot 3: sides")
    print("Slot 4: torches")
    print("Slot 5: front")
    print("Slot 6: back")
    return
end

local width = tonumber(tArgs[1])
if width < 1 then
    print("Cave width must be positive")
    return
end

local height = tonumber(tArgs[2])
if height < 1 then
    print("Cave height must be positive")
    return
end

local length = tonumber(tArgs[3])
if length < 1 then
    print("Cave length must be positive")
    return
end


local floorSlot = 1
local ceilingSlot = 2
local sideSlot = 3
local torchSlot = 4
local frontSlot = 5
local backSlot = 6

m.reservedslots = 6


local paintFloor = turtle.getItemCount(floorSlot) > 0
local paintCeiling = turtle.getItemCount(ceilingSlot) > 0
local paintSides = turtle.getItemCount(sideSlot) > 0
local placeTorches = turtle.getItemCount(torchSlot) > 0
local paintFront = turtle.getItemCount(frontSlot) > 0
local paintBack = turtle.getItemCount(backSlot) > 0

local fuelLevel = turtle.getFuelLevel()
print("Fuel level: " .. fuelLevel)
if fuelLevel < 1 then
    return
end

print("caving " .. width .. " x " .. height .. " x " .. length)

local function doPaintSide()
    if paintSides then
        m.paintForward(sideSlot)
    end
end

local function doPaintFloor()
    if paintFloor then
        m.paintDown(floorSlot)
    end
end

local function doPaintCeiling()
    if paintCeiling then
        m.paintUp(ceilingSlot)
    end
end


local goRight = true
for i = 1, length do

    if ((i - 1) % torchDist == 0) then
        if placeTorches then
            if height > 2 then
                m.turtleUp()
            end
            m.turtleUp()
            turtle.dig()
            m.turtleDown()
            if (m.selectMaterial(torchSlot)) then
                turtle.turnLeft()
                turtle.placeUp()
                turtle.turnRight()
            end
            if height > 2 then
                m.turtleDown()
            end
        end
    end

    -- prepare for next slice
    m.turtleForward()
    m.turn( not goRight )
    doPaintSide()
    m.turn( goRight )
    m.turn( goRight )

    for h = 1, height do

        for w = 1, width do

            if (h == 1) then
                doPaintFloor()
            end
            if (h == height) then
                doPaintCeiling()
            end
            if (paintFront and i == 1) then
                m.turn(goRight)
                m.paintForward(frontSlot)
                m.turn(not goRight)
            end

            if (paintBack and i == length) then
                m.turn(not goRight)
                m.paintForward(backSlot)
                m.turn(goRight)
            end

            if (w < width) then
                m.turtleForward()
            end
        end

        doPaintSide()
        if h < height then
            m.turtleUp()
            doPaintSide()
            turtle.turnRight()
            turtle.turnRight()
            goRight = not goRight
        end
    end

    for h = 1, height - 1 do
        m.turtleDown()
    end
    m.turn( not goRight )
    goRight = not goRight
end

-- return to start position.
if (not goRight) then
    -- turtle is to the right, move back to left side
    m.turn( false )
    for i=1,width-1 do
        m.turtleForward(width)
    end
    m.turn( false )
else
    -- else just turn around
    m.turn( false )
    m.turn( false )
end

for i=1, length-1 do
    m.turtleForward()
end
m.turn( false )
m.turn( false )