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McBaron

Jun 29th, 2025 (edited)

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-- Turtle Fill: Single-Layer Skip, Chest Behind, Robust Home Tracking
-- == Helpers ==
heading = 0
posX, posY, posZ = 0, 0, 0
function turnRight()
turtle.turnRight()
heading = (heading + 1) % 4
end
function turnLeft()
turtle.turnLeft()
heading = (heading + 3) % 4
end
function face(dir)
local turns = (dir - heading) % 4
if turns == 1 then turnRight()
elseif turns == 2 then turnRight() turnRight()
elseif turns == 3 then turnLeft()
end
end
function forward()
while not turtle.forward() do turtle.dig() sleep(0.2) end
if heading == 0 then posX = posX + 1
elseif heading == 1 then posZ = posZ + 1
elseif heading == 2 then posX = posX - 1
else posZ = posZ - 1 end
end
function moveUp() while not turtle.up() do turtle.digUp() sleep(0.2) end posY = posY + 1 end
function moveDown() while not turtle.down() do turtle.digDown() sleep(0.2) end posY = posY - 1 end
function refuelIfNeeded(needed)
turtle.select(1)
if turtle.getFuelLevel() == "unlimited" then return true end
if turtle.getFuelLevel() < needed then
print("Refueling from slot 1...")
turtle.refuel(64)
end
return turtle.getFuelLevel() >= needed
end
function dumpToChest()
print("Dumping items to chest behind...")
turnLeft(); turnLeft()
for i = 2, 16 do
turtle.select(i)
local itm = turtle.getItemDetail()
if itm and itm.name ~= targetBlockName then turtle.drop() end
end
turnLeft(); turnLeft()
end
function isInventoryFull()
for i = 3, 16 do if turtle.getItemCount(i) == 0 then return false end end
return true
end
function placeSlot2Block()
turtle.digDown()
if turtle.detectDown() then return true end
for i = 2, 16 do
turtle.select(i)
local itm = turtle.getItemDetail()
if itm and itm.name == targetBlockName then return turtle.placeDown() end
end
return "out_of_blocks"
end
function goTo(tx, ty, tz, th)
while posY < ty do moveUp() end
while posY > ty do moveDown() end
if posX < tx then face(0) while posX < tx do forward() end
elseif posX > tx then face(2) while posX > tx do forward() end end
if posZ < tz then face(1) while posZ < tz do forward() end
elseif posZ > tz then face(3) while posZ > tz do forward() end end
face(th)
end
-- == Input ==
function askNumber(p)
print(p)
local n = tonumber(read())
while not n do print("Enter a number:") n = tonumber(read()) end
return math.floor(n)
end
function askDirection()
print("Build 'up' or 'down'?")
local d = read()
while d ~= "up" and d ~= "down" do print("Type 'up' or 'down'") d = read() end
return d
end
local length = askNumber("Length?")
local width = askNumber("Width?")
local height = askNumber("Height?")
local direction
if height == 1 then
direction = "up"
print("Single layer: defaulting to up.")
else
direction = askDirection()
end
local est = length * width * height * 3 + (height-1)*(length+width)
print("Need fuel:", est)
if not refuelIfNeeded(est) then
print("Not enough fuel!"); return
end
turtle.select(2)
local blk = turtle.getItemDetail()
if not blk then print("Put fill block in slot 2."); return end
targetBlockName = blk.name
print("Using:", targetBlockName)
print("Put chest BEHIND turtle before starting.")
forward()
function buildLayer()
for w = 1, width do
for l = 1, length do
turtle.dig()
local pr = placeSlot2Block()
if pr == "out_of_blocks" then
goTo(0,0,0,0); dumpToChest()
print("Out of blocks. Returned home. Refill and rerun.")
return "stop"
elseif not pr then return false end
if isInventoryFull() then
goTo(0,0,0,0); dumpToChest()
print("Inventory full. Returned home.")
return "stop"
end
if l < length then forward() end
end
if w < width then
if w%2==1 then turnRight() forward() turnRight()
else turnLeft() forward() turnLeft()
end
end
end
goTo(0,posY,0,0)
return true
end
-- == Build Main ==
function build()
if direction == "up" then
for h = 1, height do
print("Layer",h,"/",height)
local r = buildLayer()
if r=="stop" then return end
if h<height then moveUp() end
end
else
for i=1,height-1 do moveUp() end
for h=height,1,-1 do
print("Layer",h,"/",height)
local r = buildLayer()
if r=="stop" then return end
if h>1 then moveDown() end
end
end
goTo(0,0,0,0); dumpToChest()
print("✅ Build complete!")
end
build()

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