建造动画

Coddy Roblox 游戏：工厂大亨课程的第 12 课，共 22 课。

购买的物品会弹出并就位。机器大亨会更喜欢物品升起并从地下出现，同时逐渐显现的效果。补间可以实现这个效果：记住部件应该在什么位置，以及应该有多透明，然后将它向下移动 8 个 studs 并设为不可见，最后再用补间将它移回原位：

local goal = part.Position
local transparency = part.Transparency
part.Position = goal - Vector3.new(0, 8, 0)
part.Transparency = 1
TweenService:Create(part, TweenInfo.new(1), { Position = goal, Transparency = transparency }):Play()

物品可以是一个部件（投放器），也可以是由多个部件组成的 Model（墙壁），所以如果物品本身是一个部件，build 就会让它升起；如果物品包含多个部件，就会让其中的每个部件升起。

如果投放器还在地下时就启动，它投下的第一块矿石会掉进虚空，因此，购买的投放器要等落地后才启动：task.delay(1, startDropper, item) 会在一秒后运行它。

挑战

中等

让购买的物品从地面升起。

获取 TweenService，并按照课上的内容编写 riseIn(part)。
在 build 中，将物品移入工厂后，如果物品是 BasePart，就对它调用 riseIn；并对其所有后代中的每个 BasePart 调用 riseIn。
使用 task.delay(1, startDropper, item) 启动购买的投放器。

点击“开始”并购买墙壁：它们会升起并淡入。然后点击“检查”。

亲手试试

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")

-- 每个玩家的排行榜上都有 Cash
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)

-- 工厂上方的告示牌
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

-- 矿石：由掉落器投放的小物块，价值为 Cash
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

local function startDropper(dropper)
	task.spawn(function()
		while dropper:IsDescendantOf(workspace) do
			dropOre(dropper)
			task.wait(Settings.DropInterval)
		end
	end)
end

-- 传送带会运送放在上面的物品
tycoon.Conveyor.AssemblyLinearVelocity = Vector3.new(Settings.BeltSpeed, 0, 0)

-- 收集器将矿石转换成 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)

-- 升级器会将经过的每块矿石的价值翻倍，每块只升级一次
items.Upgrader.Touched:Connect(function(hit)
	if hit.Name == "Ore" and not hit:GetAttribute("Upgraded") then
		hit:SetAttribute("Upgraded", true)
		hit:SetAttribute("Value", hit:GetAttribute("Value") * 2)
		hit.Color = Color3.fromRGB(155, 89, 182)
	end
end)

-- 第 12 课：在这里添加建造动画

-- 将购买的物品放进工厂
local function build(item)
	item.Parent = tycoon.Built
	if item:HasTag("Dropper") then
		startDropper(item)
	end
end

-- 购买：踏板消失，对应的物品建造完成
local function buy(pad, player)
	if 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
		return
	end
	cash.Value -= price
	pad.Parent = ServerStorage
	build(items:FindFirstChild(pad:GetAttribute("Item")))
end

for _, pad in tycoon.Buttons:GetChildren() do
	pad.Touched:Connect(function(hit)
		local player = Players:GetPlayerFromCharacter(hit.Parent)
		if player then
			buy(pad, player)
		end
	end)
end

-- 每个踏板上方都悬浮着价格标签
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

-- 认领：第一个踩上踏板的玩家拥有这座工厂
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)