game optimizer

--wait for player and game to load in
repeat wait() until game:IsLoaded()
local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()

local cam = workspace.CurrentCamera
local rep = game.ReplicatedStorage

--positional values to know if player is inside a specific building or not
local inside : number = -575
local outside : number = -494

--ternary to know if player is using mobile or not
local mobile = game:GetService("UserInputService"):GetLastInputType() == Enum.UserInputType.Focus and true or false

local renderDistanceOption = player:WaitForChild("PlayerGui"):WaitForChild("Main"):WaitForChild("Settings"):WaitForChild("ScrollingFrame"):WaitForChild("Container"):WaitForChild("RenderDistance")

local fps
local spawned = false
local enteredBuilding = false

--just some instances cached
local builds = workspace:WaitForChild("Builds")
local interior = builds:WaitForChild("Interior")
local exterior = builds:WaitForChild("Exterior")

local level1Interior = builds:WaitForChild("Level1Walls")
local level2Interior = builds:WaitForChild("Level2Walls")
local level3Interior = builds:WaitForChild("Level3Walls")


local levels = {}
local currentLevel = 1

local levelChanger1 = workspace:WaitForChild("LevelChanger1")
local levelChanger2 = workspace:WaitForChild("LevelChanger2")
local levelChanger3 = workspace:WaitForChild("LevelChanger3")

--function to iterate through array of floors and change the floor's parent
local function HideOtherStories()
    for level, floor in pairs(levels) do
        if level == currentLevel then continue end

        for _, room in pairs(floor) do
            room.Parent = rep
        end
    end
end

--reset the floors to standard when the player's character spawns in
player.CharacterAdded:Connect(function(char)
    character = char
    currentLevel = 1

    level1Interior.Parent = builds
    level2Interior.Parent = rep
    level3Interior.Parent = rep
    HideOtherStories()
end)

--touched event on all floors to spawn/despawn correct floors
levelChanger1.Touched:Connect(function(touched)
    if touched.Parent == character and currentLevel ~= 1 then
        for _, room in pairs(levels[currentLevel]) do
            room.Parent = rep
        end

        currentLevel = 1
        level1Interior.Parent = builds
        level2Interior.Parent = rep
        HideOtherStories()
    end
end)

levelChanger2.Touched:Connect(function(touched)
    if touched.Parent == character and currentLevel ~= 2 then
        for _, room in pairs(levels[currentLevel]) do
            room.Parent = rep
        end

        currentLevel = 2
        level1Interior.Parent = rep
        level3Interior.Parent = rep
        level2Interior.Parent = builds
        HideOtherStories()
    end
end)

levelChanger3.TouchEnded:Connect(function(touched)
    if touched.Parent == character and currentLevel ~= 3 then
        for _, room in pairs(levels[currentLevel]) do
            room.Parent = rep
        end

        currentLevel = 3
        level2Interior.Parent = rep
        level3Interior.Parent = builds
    end
end)

--just simply update the current displayed fps
game:GetService("RunService").Heartbeat:Connect(function(delta)
    fps = 1/delta
end)

local function HideRooms()
--get the rooms of the current floor
    for _, room in pairs(levels[currentLevel]) do

        --detect the distance to each room from player's camera
        local playerPos = cam.CFrame.Position
        local distToRoom = (playerPos - room.WorldPivot.Position).magnitude

        spawn/despawn each room if they are far away or close enough to player camera
        if(distToRoom < room:GetAttribute("RenderDistance")) then
            room.Parent = interior
        else
            room.Parent = rep
        end
    end
end

local function HideWalls()
    --walls are not parented the same way, so made separate function to hide/show them depending on which floor the player is on
    if currentLevel == 1 then
        level1Interior.Parent = builds
        level2Interior.Parent = rep
        level3Interior.Parent = rep
    end

    if currentLevel == 2 then
        level1Interior.Parent = rep
        level2Interior.Parent = builds
        level3Interior.Parent = rep
    end

    if currentLevel == 3 then
        level1Interior.Parent = rep
        level2Interior.Parent = rep
        level3Interior.Parent = builds
    end
end

local function HideExterior()
    local playerPos = cam.CFrame.Position
    --when player is inside the building, hide the exterior to remove a lot of models
    if playerPos.Z < outside then
        exterior.Parent = builds

        if enteredBuilding then
            enteredBuilding = false
            level1Interior.Parent = rep
        end
    else
        exterior.Parent = rep

        if not enteredBuilding then
            level1Interior.Parent = builds
            enteredBuilding = true
        end
    end
end

local function HideEverything()
    local playerPos = cam.CFrame.Position
    --player is currently outside, so hide all interior
    if playerPos.Z < inside then
        interior.Parent = rep
        level1Interior.Parent = rep
        level2Interior.Parent = rep
        level3Interior.Parent = rep
        return true
    end

    interior.Parent = builds
    return false
end

local function ShowEverything()
    --iterate through all floors and their rooms to show them (was used for intro scene)
    for level, rooms in pairs(levels) do
        for _, room in pairs(rooms) do
            room.Parent = interior
        end
    end

    level1Interior.Parent = builds
    level2Interior.Parent = builds
    level3Interior.Parent = builds

    interior.Parent = builds
    exterior.Parent = builds
end

ShowEverything()
level1Interior.Parent = builds
--following lines are to detect when player exist intro (bad code as previous developer made a bad system)
player.PlayerValues.InMenu:GetPropertyChangedSignal("Value"):Wait()

if rep:WaitForChild("PlayerData"):InvokeServer("GetData") then
    cam:GetPropertyChangedSignal("CameraType"):Wait()
    cam:GetPropertyChangedSignal("CameraType"):Wait()
    cam:GetPropertyChangedSignal("CameraType"):Wait()
end

level1Interior.Parent = rep
level2Interior.Parent = rep
level3Interior.Parent = rep

--quick small algorithm to find all the floors and their rooms to cache them
for _, level in pairs(interior:GetChildren()) do
    levels[tonumber(level.Name:sub(-1))] = level:GetChildren()

    for _, room in pairs(level:GetChildren()) do
        room.Parent = rep
    end

    level:Destroy()
end
level1Interior.Parent = builds

--while loop that decides what to show and what to hide
while wait(1) do
    if renderDistanceOption:GetAttribute("Enabled") then
        HideExterior()

        if not HideEverything() then
            HideRooms()
            HideWalls()
        end
    else
        ShowEverything()
    end
end