ComputerCraft: Tofu1

-- tofu1
--  豆腐建築を行うプログラムです
--  アイテムインベントリに適当にアイテム詰めて

-- ####### Config ###########
local haba = 15
local okuyuki = 12
local takasa = 5


-- ####### Functions ########
-- インベントリを先頭から走査し、確実にアイテムを使う
function selectNextSlot()
  local current = turtle.getSelectedSlot()
  if current == 16 then
    return false
  else
    turtle.select(current+1)
    return true
  end
end

function selectNextItemSlot()
  while (turtle.getItemCount()==0) and selectNextSlot() do
  end
end

-- ex. myDo(turtle.place)
function myDo(func)
  while (turtle.getItemCount()==0) and selectNextItemSlot() do
  end
  return func()
end

-- 建築用の関数
function placeSomeBlocks(n)
  if n<1 then
    -- turtle.placeDown()
    myDo(turtle.placeDown)

    return
  end

  for i=1,n do
    turtle.forward()  -- move to next position
    -- turtle.placeDown()
    myDo(turtle.placeDown)
  end
end

function placeSquare(okuyuki, haba)
  for i=1,2 do
    placeSomeBlocks(okuyuki - 1)
    turtle.turnRight()
    placeSomeBlocks(haba - 1)
    turtle.turnRight()
  end
end

function goToRightForward()
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
end



-- ###### Main ########
turtle.select(1) -- the usual phrase

turtle.up()  -- move up

-- stack six squares
for ronoji=1,takasa do
  -- 1st stage is made with slot 1, 2nd stage is slot 2, ...
  --turtle.select(ronoji)

  -- 四角形の形にブロック配置
  -- placeSquare(haba)
  placeSquare(okuyuki, haba)
  turtle.up()  -- move up
end



-- 屋根作り

while (okuyuki > 0) and (haba > 0) do
  print(okuyuki, haba)
  placeSquare(okuyuki, haba)
  goToRightForward()
  okuyuki = okuyuki - 2
  haba = haba - 2
end

-- redstone.setOutput("bottom",true)