Roblox Smooth First Person Script

--[[ Scripted by coolcapidog
Channel ->> https://www.youtube.com/c/coolcapidog
Don't change anything except you know how to script.
You can change the settings but you shouldn't change anything except settings.
]]
----------------------------------- Settings
CanToggleMouse = {allowed = true; activationkey = Enum.KeyCode.F;}
CanViewBody = true
Sensitivity = 0.6
Smoothness = 0.05
FieldOfView = 120
HeadOffset = CFrame.new(0,0.7,0)
----------------------------------- Settings

repeat wait() until game:GetService("Players").LocalPlayer.Character ~= nil
local runService = game:GetService("RunService")
local input = game:GetService("UserInputService")
local players = game:GetService("Players")

local cam = game.Workspace.CurrentCamera
local player = players.LocalPlayer
local m = player:GetMouse()
m.Icon = "http://www.roblox.com/asset/?id=569021388" -- replaces mouse icon
local character = player.Character or player.CharacterAdded:wait()
local human = character.Humanoid
local humanoidpart = character.HumanoidRootPart

local head = character:WaitForChild("Head")
local CamPos,TargetCamPos = cam.CoordinateFrame.p,cam.CoordinateFrame.p
local AngleX,TargetAngleX = 0,0
local AngleY,TargetAngleY = 0,0

local running = true
local freemouse = false
local defFOV = FieldOfView

local w, a, s, d, lshift = false, false, false, false, false

local easingtime = 0.1 --0~1
local walkspeeds = {
	enabled =		  true;
	walkingspeed =		16;
	backwardsspeed =	10;
	sidewaysspeed =		15;
	diagonalspeed =		16;
	runningspeed =		25;
	runningFOV=			85;}

function updatechar()
	for _, v in pairs(character:GetChildren())do
		if CanViewBody then
			if v.Name == 'Head' then
				v.LocalTransparencyModifier = 1
				v.CanCollide = false
				v.face.LocalTransparencyModifier = 1
			end
		else
			if v:IsA'Part' or v:IsA'UnionOperation' or v:IsA'MeshPart' then
				v.LocalTransparencyModifier = 1
				v.CanCollide = false
			end
		end
		if v:IsA'Accessory' then
			v:FindFirstChild('Handle').LocalTransparencyModifier = 1
			v:FindFirstChild('Handle').CanCollide = false
		end
		if v:IsA'Hat' then
			v:FindFirstChild('Handle').LocalTransparencyModifier = 1
			v:FindFirstChild('Handle').CanCollide = false
		end
	end
end

function lerp(a, b, t)
	return a * (1-t) + (b*t)
end
input.InputChanged:connect(function(inputObject)
	if inputObject.UserInputType == Enum.UserInputType.MouseMovement then
		local delta = Vector2.new(inputObject.Delta.x/Sensitivity,inputObject.Delta.y/Sensitivity) * Smoothness

		local X = TargetAngleX - delta.y
		TargetAngleX = (X >= 80 and 80) or (X <= -80 and -80) or X
		TargetAngleY = (TargetAngleY - delta.x) %360
	end
end)

input.InputBegan:connect(function(inputObject)
	if inputObject.UserInputType == Enum.UserInputType.Keyboard then
		if inputObject.KeyCode == CanToggleMouse.activationkey then
			if CanToggleMouse.allowed and freemouse == false then
				freemouse = true
			else
				freemouse = false
			end
		end
	end
	if inputObject.UserInputType == Enum.UserInputType.Keyboard then
		if inputObject.KeyCode == Enum.KeyCode.W then
			w = true
		end
		if inputObject.KeyCode == Enum.KeyCode.A then
			a = true
		end
		if inputObject.KeyCode == Enum.KeyCode.S then
			s = true
		end
		if inputObject.KeyCode == Enum.KeyCode.D then
			d = true
		end
		if inputObject.KeyCode == Enum.KeyCode.LeftShift then
			lshift = true
		end
	end
end)

input.InputEnded:connect(function(inputObject)
	if inputObject.UserInputType == Enum.UserInputType.Keyboard then
		if inputObject.KeyCode == Enum.KeyCode.W then
			w = false
		end
		if inputObject.KeyCode == Enum.KeyCode.A then
			a = false
		end
		if inputObject.KeyCode == Enum.KeyCode.S then
			s = false
		end
		if inputObject.KeyCode == Enum.KeyCode.D then
			d = false
		end
		if inputObject.KeyCode == Enum.KeyCode.LeftShift then
			lshift = false
		end
	end
end)

runService.RenderStepped:connect(function()
	if running then
		updatechar()
		CamPos = CamPos + (TargetCamPos - CamPos) *0.28
		AngleX = AngleX + (TargetAngleX - AngleX) *0.35
		local dist = TargetAngleY - AngleY
		dist = math.abs(dist) > 180 and dist - (dist / math.abs(dist)) * 360 or dist
		AngleY = (AngleY + dist *0.35) %360
		cam.CameraType = Enum.CameraType.Scriptable
		cam.CoordinateFrame = CFrame.new(head.Position)
			* CFrame.Angles(0,math.rad(AngleY),0)
			* CFrame.Angles(math.rad(AngleX),0,0)
			* HeadOffset
		humanoidpart.CFrame=CFrame.new(humanoidpart.Position)*CFrame.Angles(0,math.rad(AngleY),0)
	else game:GetService("UserInputService").MouseBehavior = Enum.MouseBehavior.Default
	end
	if (cam.Focus.p-cam.CoordinateFrame.p).magnitude < 1 then
		running = false
	else
		running = true
		if freemouse == true then
			game:GetService("UserInputService").MouseBehavior = Enum.MouseBehavior.Default
		else
			game:GetService("UserInputService").MouseBehavior = Enum.MouseBehavior.LockCenter
		end
	end
	if not CanToggleMouse.allowed then
		freemouse = false
	end
	cam.FieldOfView = FieldOfView
	if walkspeeds.enabled then
		if w and s then return end
		if w and not lshift then
			FieldOfView = lerp(FieldOfView, defFOV,easingtime)
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.walkingspeed,easingtime)
		elseif w and a then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.diagonalspeed,easingtime)
		elseif w and d then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.diagonalspeed,easingtime)
		elseif s then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.backwardsspeed,easingtime)
		elseif s and a then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.backwardsspeed - (walkspeeds.diagonalspeed - walkspeeds.backwardsspeed),easingtime)
		elseif s and d then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.backwardsspeed - (walkspeeds.diagonalspeed - walkspeeds.backwardsspeed),easingtime)
		elseif d then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.sidewaysspeed,easingtime)
		elseif a then
			human.WalkSpeed = lerp(human.WalkSpeed,walkspeeds.sidewaysspeed,easingtime)
		end
		if lshift and w then
			FieldOfView = lerp(FieldOfView, walkspeeds.runningFOV,easingtime)
			human.WalkSpeed = lerp(human.WalkSpeed,human.WalkSpeed + (walkspeeds.runningspeed - human.WalkSpeed),easingtime)
		end
	end
end)