Player looking at npc help?

Ok so basically I am trying to make a script where the local player automatically looks at the nearest npc, but I have no idea how to do it. Can someone explain to me, and script it? Would appreciate it.

Have you considered changing the CFrame or rotation of the player's HumanoidRootPart?

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local npcRoot = game.Workspace:WaitForChild("NPC"):WaitForChild("HumanoidRootPart") -- your npc's root part

wait(5) -- just waiting for the game to load
character:SetPrimaryPartCFrame(npcRoot.CFrame)

https://developer.roblox.com/en-us/api-reference/function/Model/SetPrimaryPartCFrame

Also you can use Magnitude to determine who is the closest NPC(if you haven't yet)

https://developer.roblox.com/en-us/articles/Magnitude

I haven't tested this out but I hope it helps a little bit or leads you in the right direction

There are some ways, you see what fits you better:

Fist of all, a "get closer" function:

local Root = Character:WaitForChild("HumanoidRootPart")
local minDistance = 30
local nilPos = Vector3.new(0, 1000000000, 0)

local function getCloserNpcHead(TableOfNPCs)

	-- faking a object's position to compare latter
	local closerChar = {Head = {Position = nilPos }} 
	
	-- iterate through all characters and setting new closerChar
	for i, v in pairs (TableOfNPCs) do
		if (Root.Position - v.Head.Position).Magnitude < (Root.Position - closerChar.Head.Position).Magnitude  then
			if (Root.Position - v.Head.Position).Magnitude <= minDistance then
				closerChar = v
			end
		end
	end

	-- Check if there is a new closerChar and return it
	if closerChar.Head.Position ~= nilPos then
		return
	end
end

• Now, you have to manage to get a table with all the npc characters you want to calculate. Like, if they are all in a folder in workspace, you can call the function with

local CloserNPC = getCloserNpcHead(workspace.NPCsFolder)

You can also use Collection Service to better organize who is NPC and who is not.

-- Put a Script in the NPC with this to tag it:

local CollectionService = game:GetService("CollectionService")

CollectionService:AddTag("NPC", scriptParent)

then you can get all the character tagged with "NPC" to use our GetCloser function:

local CollectionService = game:GetService("CollectionService")

local npcTable = CollectionService:GetTagged("NPC")
local CloserNPC = getCloserNpcHead(npcTable)

Turning the head is a bit more complicated, it involves moving the Motor6D's CFrame. This are hard to make, but there are videos with examples on youtube like this: https://www.youtube.com/watch?v=mdXRnNb0S6o You will have to firgure out by yourself how to addapt to facing a part, unfortunatelly i cant do that.