build_floor.lua

local l,w = ...
local b=true
local function rotate()
    if b then
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
    else
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
    end
    b = not b
end
local function slot_plus() turtle.select(turtle.getSelectedSlot()%16+1) end
local function floor_block()
    if not turtle.compareDown() then
        turtle.digDown()
        if not turtle.placeDown() then
            slot_plus()
            turtle.placeDown()
        end
        while turtle.getItemCount()==0 do slot_plus() end
    end
end
local function floor_line(n)
    for j=1,n do
        floor_block()
        turtle.forward()
    end
end
local function build_floor(l,w)
    b=true
    for i=1,w-1 do
        floor_line(l-1)
        floor_block()
        rotate()
    end
    floor_line(l-1)
    floor_block()
end
if not l then
    error("Must have two arguments: length and width.")
end
if tonumber(l) and tonumber(w) then
    build_floor(l,w)
end
return {build=build_floor}