Npc Roblox

local system = {}
local assets = game.ReplicatedStorage.Assets
local animation = require(game.ReplicatedStorage.Modules.animation)
local text = require(game.ReplicatedStorage.Modules.text)
local uis = game:GetService("UserInputService")

--Settings
local settings = {
    distanceOffset = 55,
    animationOffset = 25,
    animationCooldownTime = 25,
    key = "e",
}

--Functions
function system.new(npctype,spawna,messages,cameraangle)
    local player = game.Players.LocalPlayer
    local char = player.Character or player.CharacterAdded:wait()
    local camera = workspace.CurrentCamera
    local gui = player:WaitForChild("PlayerGui")
    local cooldown = false

    --Spawn npc
    local npc = assets[npctype]:Clone()
    local cIn
    pcall(function()
        cIn=spawna["ClassName"]
    end)
    if cIn then
        --If part or model.
        if spawna:IsA("BasePart") then
            npc:SetPrimaryPartCFrame(spawna.CFrame+Vector3.new(0,npc.HumanoidRootPart.Size.Y+0.25,0))
        elseif spawna:IsA("Model") and spawna.PrimaryPart then
            npc:SetPrimaryPartCFrame(spawna.PrimaryPart.CFrame+Vector3.new(0,npc.HumanoidRootPart.Size.Y+0.25,0))
        else
            warn("Failed to recieve cframe of object: ".. spawna.Name)
        end
    elseif spawna.p then
        npc:SetPrimaryPartCFrame(spawna+Vector3.new(0,npc.HumanoidRootPart.Size.Y+0.25,0))
    else
        warn("No object of CFrame given.")
    end
    npc.Parent = workspace.npc

    --Setup the gui
    local _gui = gui:WaitForChild("MainUI")

    _gui.alert.center.letter.Text = string.upper(settings.key)
    _gui.message.letter.Text = string.upper(settings.key)
    _gui.message.center.title.Text = ""

    --Play idle animation
    local itrack = animation:animate(507766388,npc.Humanoid)

    --Check for the NPC's Line of sight.
    local raus,vaus
    local render = game:GetService("RunService").RenderStepped:connect(function(dt)
        local dist = (npc.HumanoidRootPart.CFrame.p-char.HumanoidRootPart.CFrame.p).magnitude
        if not cooldown and not vaus then
            if dist <= settings.animationOffset then
                local ray = Ray.new(npc.HumanoidRootPart.CFrame.p,npc.HumanoidRootPart.CFrame.lookVector*500)
                local object,surfaceposition = workspace:FindPartOnRay(ray,npc)
                if object then
                    local target = object.Parent
                    if target:FindFirstChild("Humanoid") and game.Players:FindFirstChild(target.Name) then
                        cooldown=true
                        local track = animation:animate(507770239,npc.Humanoid)
                        wait(1.5)
                        track:stop()
                        spawn(function()
                            wait(settings.animationCooldownTime)
                            cooldown=false
                        end)
                    end
                end
            end
        end
        if not vaus then
            if dist <= settings.distanceOffset then
                --Raise the gui
                _gui.alert:TweenPosition(UDim2.new(0,0,0,9,0),"Out","Linear",0.3,false)
                raus=true
            else
                _gui.alert:TweenPosition(UDim2.new(0,0,1.2,0),"In","Linear",0.3,false)
                raus=false
            end
        end
    end)

    --Detect user input, allow for conversation.
    local input = uis.InputBegan:connect(function(key,gpe)
        if key.KeyCode == Enum.KeyCode[string.upper(settings.key)] and vaus ~= true then
            vaus=true
            raus=false
            _gui.alert:TweenPosition(UDim2.new(0,0,1.2,0),"In","Linear",0.3,true)

            --Rotate player accordingly to the NPC
            char.HumanoidRootPart.CFrame = CFrame.new(char.HumanoidRootPart.CFrame.p.npc.HumanoidRootPart.CFrame.p)

            --Set camera position
            camera.CameraType = Enum.CameraType.Scriptable
            pcall(function()
                cIn=cameraangle["ClassName"]
            end)
            if cIn then
                --If part or model.
                if cameraangle:IsA("BasePart") then
                    camera.CFrame = cameraangle.CFrame
                elseif cameraangle:IsA("Model") and cameraangle.PrimaryPart then
                    camera.CFrame = cameraangle.PrimaryPart.CFrame
                else
                    warn("Failed to recieve cframe of object: " .. cameraangle.Name)
                end
            elseif cameraangle.p then
                camera.CFrame = cameraangle
            else
                warn("No object of CFrame given.")
            end

            --Stop player motion
            local ws,jp = char.Humanoid.Walkspeed,char.Humanoid.JumpPower
            char.Humanoid.WalkSpeed = 0
            char.Humanoid.JumpPower = 0
            _gui.message.TweenPosition(UDim2.new(0,0,0,9,0),"Out","Linear",0.3,true)
            wait(0.3)
            for a,b in pairs(messages) do
                text.gradual(b,_gui.message.center.title)
                for c=1,0,-0.1 do
                    _gui.message.letter.BackroundTransparency = c
                    _gui.message.letter.TextTransparency = c
                    wait()
                end
                local subimput,success
                subimput = uis.ImputBegan:connect(function(key,gpe)
                    if key.KeyCode == Enum.KeyCode[string.upper(settings.key)] then
                        subimput:disconnect()
                        success=true
                    end
                end)
                repeat wait() until success
                spawn(function()
                    for c=0,1,0.1 do
                        _gui.message.letter.BackroundTransparency = c
                        _gui.message.letter.TextTransparency = c
                        wait()
                    end
                end)
                if a == #messages then
                    _gui.message.TweenPosition(UDim2.new(0,0,1.2,0),"In","Linear",0.3,true)
                    char.Humanoid.WalkSpeed = ws
                    char.Humanoid.JumpPower = jp
                    camera.CameraType = Enum.CameraType.Custom
                    vaus=false
                    _gui.message.enter.title.Text = ""
                end
            end
        end
    end)

    return function()
        itrack:Stop()
        input:disconnect()
        render:disconnect()
        npc:Destroy()
    end
end

return system