瞄准

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

local remotes = game.ReplicatedStorage.Remotes
local enemies = workspace.Enemies
local towers = workspace.Towers

print("The base can take " .. Settings.BaseHealth .. " hits")

-- 按顺序排列的路径点（名称依次是 1、2、3……）
local waypoints = workspace.Path.Waypoints:GetChildren()
table.sort(waypoints, function(a, b)
	return tonumber(a.Name) < tonumber(b.Name)
end)

-- 基地的生命值作为 workspace 的属性，每个客户端都能读取
workspace:SetAttribute("BaseHealth", Settings.BaseHealth)

-- 每位玩家的排行榜上都有 Money
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local money = Instance.new("IntValue")
	money.Name = "Money"
	money.Value = Settings.StartMoney
	money.Parent = leaderstats
end)

-- 一个敌人到达了基地
local function damageBase(amount)
	local health = math.max(0, workspace:GetAttribute("BaseHealth") - amount)
	workspace:SetAttribute("BaseHealth", health)
	print("Base: " .. health)
end

-- 让敌人沿路径行走。MoveTo 会在 8 秒后放弃，并发出提示
-- （MoveToFinished 返回 false），所以会再次让移动缓慢的敌人前进，直到它到达目的地。
local function walkPath(enemy)
	local humanoid = enemy.Humanoid
	for i = 2, #waypoints do
		repeat
			humanoid:MoveTo(waypoints[i].Position)
		until humanoid.MoveToFinished:Wait() or not enemy.Parent
		if not enemy.Parent then
			return
		end
	end
	-- 它到达了基地
	damageBase(Settings.Enemies[enemy.Name].Damage)
	enemy:Destroy()
end

-- 一个新敌人出现在入口，沿路径行走
local function spawnEnemy(kind)
	local enemy = ServerStorage.Enemies[kind]:Clone()
	-- 放在第一个路径点的正上方
	enemy:PivotTo(waypoints[1].CFrame + Vector3.new(0, 5, 0))
	local info = Settings.Enemies[kind]
	enemy.Humanoid.MaxHealth = info.Health
	enemy.Humanoid.Health = info.Health
	enemy.Humanoid.WalkSpeed = info.Speed
	enemy.Parent = enemies
	task.spawn(walkPath, enemy)
	return enemy
end

-- 第 9 课：在这里添加瞄准功能

-- 在底座上建造一座塔
local function placeTower(pad, kind)
	local tower = ServerStorage.Towers[kind]:Clone()
	tower:PivotTo(pad.CFrame + Vector3.new(0, pad.Size.Y / 2 + 1, 0))
	tower.Parent = towers
end

-- 客户端请求在底座上建造一座塔
remotes.Place.OnServerEvent:Connect(function(player, pad, kind)
	placeTower(pad, kind)
end)

-- 一波敌人：逐个生成，等它们全部消失
local function runWave(list)
	for _, kind in list do
		spawnEnemy(kind)
		task.wait(Settings.SpawnGap)
	end
	while #enemies:GetChildren() > 0 do
		task.wait(0.2)
	end
end

-- 每波之间休息一段时间
for i, list in Settings.Waves do
	task.wait(Settings.WaveBreak)
	runWave(list)
end