BUILD_HOUSE.lua

nadkarnik

Jul 4th, 2025

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-- Helper: Select next non-empty slot
function selectNextSlot()
for i = 1, 16 do
local slot = (turtle.getSelectedSlot() % 16) + 1
turtle.select(slot)
if turtle.getItemCount() > 0 then
return true
end
end
return false
end
-- Helper: Try placing a block in a direction, handling slot changes
function placeBlockDown()
while not turtle.placeDown() do
if turtle.getItemCount() == 0 then
if not selectNextSlot() then error("Out of blocks!") end
else
sleep(0.2)
end
end
end
function placeBlockUp()
while not turtle.placeUp() do
if turtle.getItemCount() == 0 then
if not selectNextSlot() then error("Out of blocks!") end
else
sleep(0.2)
end
end
end
function placeBlockForward()
while not turtle.place() do
if turtle.getItemCount() == 0 then
if not selectNextSlot() then error("Out of blocks!") end
else
sleep(0.2)
end
end
end
-- Helpers: Movement (with digging if needed)
function forwardSafe()
while not turtle.forward() do
turtle.dig()
sleep(0.2)
end
end
function upSafe()
while not turtle.up() do
turtle.digUp()
sleep(0.2)
end
end
function downSafe()
while not turtle.down() do
turtle.digDown()
sleep(0.2)
end
end
-- Build the floor at the current level
function buildFloor(length, width)
for w = 1, width do
for l = 1, length do
placeBlockDown()
if l < length then forwardSafe() end
end
if w < width then
if w % 2 == 1 then
turtle.turnRight()
forwardSafe()
turtle.turnRight()
else
turtle.turnLeft()
forwardSafe()
turtle.turnLeft()
end
end
end
-- Return to bottom-left corner facing original direction
if width % 2 == 1 then
turtle.turnRight()
for i = 1, length - 1 do turtle.back() end
turtle.turnRight()
else
turtle.turnLeft()
for i = 1, length - 1 do turtle.back() end
turtle.turnLeft()
end
for i = 1, width - 1 do turtle.back() end
end
-- Build walls around the structure
function buildWalls(length, width, height)
local function buildWallSegment()
for h = 1, height - 2 do
upSafe()
placeBlockForward()
end
for i = 1, height - 2 do downSafe() end
end
local function moveAndWall(dist)
for i = 1, dist - 1 do
forwardSafe()
buildWallSegment()
end
end
buildWallSegment()
moveAndWall(length)
turtle.turnRight()
buildWallSegment()
moveAndWall(width)
turtle.turnRight()
buildWallSegment()
moveAndWall(length)
turtle.turnRight()
buildWallSegment()
moveAndWall(width)
turtle.turnRight()
end
-- Build ceiling (go to height, then build floor again at top)
function buildCeiling(length, width, height)
for i = 1, height - 1 do upSafe() end
buildFloor(length, width)
for i = 1, height - 1 do downSafe() end
end
-- Main function
function buildHollowBox(length, width, height)
if length < 2 or width < 2 or height < 2 then
error("Dimensions must be at least 2x2x2.")
end
-- Ensure a valid slot is selected
if turtle.getItemCount() == 0 then
if not selectNextSlot() then
error("No blocks in inventory!")
end
end
buildFloor(length, width)
buildWalls(length, width, height)
buildCeiling(length, width, height)
print("✅ Hollow structure complete.")
end
-- Example call:
-- Uncomment and customize the below line to run directly:
-- buildHollowBox(5, 4, 3)

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