Every Pad

Lesson 9 of 18 in Coddy's Roblox Game: Factory Tycoon course.

Four more pads wait, and copying the buy code four times would mean fixing every bug four times. One function handles every pad: each pad's Item attribute names what it buys, and items:FindFirstChild(name) finds that item.

local function buy(pad, player)
	-- the checks and the price, as before
	build(items:FindFirstChild(pad:GetAttribute("Item")))
end

A second function, build(item), puts an item in the factory and starts it if it is a dropper (it has the Dropper tag). The walls, the statue and the upgrader are built the same way; only droppers start.

Challenge

Medium

Replace the single pad's code:

Write build(item): move the item into tycoon.Built, and start it if it has the Dropper tag.
Write buy(pad, player): the same checks and price as before, then move the pad to ServerStorage and build the item its Item attribute names.
Connect Touched on every pad in tycoon.Buttons to call buy for the touching player.

Press Play and buy your way along the row, then Check.

Try it yourself

local Players = game:GetService("Players")
local ServerStorage = game:GetService("ServerStorage")
local CollectionService = game:GetService("CollectionService")
local Debris = game:GetService("Debris")
local Settings = require(game.ReplicatedStorage.Settings)

local tycoon = workspace.Tycoon
local items = ServerStorage.TycoonItems
local owner = nil

print("Ore is worth " .. Settings.OreValue .. " Cash")

-- Every player gets Cash on the leaderboard
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local cash = Instance.new("IntValue")
	cash.Name = "Cash"
	cash.Parent = leaderstats
end)

-- The sign above the factory
local gui = Instance.new("SurfaceGui")
gui.Parent = tycoon.Sign

local signLabel = Instance.new("TextLabel")
signLabel.Name = "Status"
signLabel.Size = UDim2.fromScale(1, 1)
signLabel.BackgroundColor3 = Color3.fromRGB(25, 25, 35)
signLabel.TextColor3 = Color3.fromRGB(255, 255, 255)
signLabel.TextScaled = true
signLabel.Text = "Step on the green pad to claim this factory"
signLabel.Parent = gui

local function setSign(text)
	signLabel.Text = text
end

-- Ore: a small part worth Cash, dropped under a dropper
local function dropOre(dropper)
	local ore = Instance.new("Part")
	ore.Name = "Ore"
	ore.Size = Vector3.new(1, 1, 1)
	ore.Color = Color3.fromRGB(150, 150, 160)
	ore.Position = dropper.Position - Vector3.new(0, 2.5, 0)
	ore:SetAttribute("Value", Settings.OreValue)
	if math.random() < Settings.GoldChance then
		ore.Color = Color3.fromRGB(255, 200, 40)
		ore.Material = Enum.Material.Neon
		ore:SetAttribute("Value", Settings.OreValue * 5)
	end
	ore.Parent = workspace
	Debris:AddItem(ore, 20)
end

-- A dropper runs one loop, however often it is started
local function startDropper(dropper)
	if dropper:GetAttribute("Running") then
		return
	end
	dropper:SetAttribute("Running", true)
	task.spawn(function()
		while dropper:IsDescendantOf(workspace) do
			dropOre(dropper)
			task.wait(Settings.DropInterval)
		end
		dropper:SetAttribute("Running", nil)
	end)
end

-- The conveyor carries whatever rests on it
tycoon.Conveyor.AssemblyLinearVelocity = Vector3.new(Settings.BeltSpeed, 0, 0)

-- The collector turns ore into Cash
tycoon.Collector.Touched:Connect(function(hit)
	if hit.Name == "Ore" then
		local value = hit:GetAttribute("Value")
		hit:Destroy()
		if owner then
			owner.leaderstats.Cash.Value += value
		end
	end
end)

-- The buy pad for a second dropper
local pad = tycoon.Buttons.Dropper2Pad
pad.Touched:Connect(function(hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	if not player or player ~= owner or pad.Parent ~= tycoon.Buttons then
		return
	end
	local cash = player.leaderstats.Cash
	local price = pad:GetAttribute("Price")
	if cash.Value >= price then
		cash.Value -= price
		pad.Parent = ServerStorage
		local dropper = items.Dropper2
		dropper.Parent = tycoon.Built
		startDropper(dropper)
	end
end)

-- A price tag floats over every pad
for _, pad in tycoon.Buttons:GetChildren() do
	local tag = Instance.new("BillboardGui")
	tag.Name = "PriceTag"
	tag.Size = UDim2.fromOffset(160, 40)
	tag.StudsOffset = Vector3.new(0, 3, 0)
	tag.Parent = pad

	local label = Instance.new("TextLabel")
	label.Size = UDim2.fromScale(1, 1)
	label.BackgroundColor3 = Color3.fromRGB(25, 25, 35)
	label.BackgroundTransparency = 0.2
	label.TextColor3 = Color3.fromRGB(255, 255, 255)
	label.TextScaled = true
	label.Text = pad:GetAttribute("Label") .. ": $" .. pad:GetAttribute("Price")
	label.Parent = tag
end

-- Claiming: the first player to step on the pad owns the factory
local claimPad = tycoon.ClaimPad
claimPad.Touched:Connect(function(hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	if player and not owner then
		owner = player
		claimPad.Color = Color3.fromRGB(120, 120, 120)
		claimPad.Material = Enum.Material.SmoothPlastic
		setSign(player.Name .. "'s Factory")
		for _, dropper in CollectionService:GetTagged("Dropper") do
			if dropper:IsDescendantOf(workspace) then
				startDropper(dropper)
			end
		end
	end
end)