How to make HumanoidRootPart Face mouse without interrupting movement

[Ariana_Grenada1 (Fate)]

Hey everybody who is reading this. I’ve been trying to make the HumanoidRootPart face the mouse without interrupting movement and the Y vector. It’s like the spell cast in Roblox Elemental Battlegrounds. Here’s a video of how I want it to work.

[arbitiu (arbi)]

pretty sure that the game does it with allign orientation

Mover Constraints | Documentation - Roblox Creator Hub

[Coulths (Jami)]

Hello! The way you can move the player’s character to face the mouse is quite simple. If you’re looking for a way to constantly face the mouse, then you’ll want to do something like this:

-- Client -> StarterPlayer -> StarterCharacterScripts

local RunService = game:GetService("RunService")

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

local Character = Player.Character or Player.CharacterAdded:Wait()
local HumanoidRootPart = Character:WaitForChild("HumanoidRootPart")


function UpdateCharacterRotation()
	local RootPosition, MousePosition = HumanoidRootPart.Position, Mouse.Hit.Position
	HumanoidRootPart.CFrame = CFrame.new(RootPosition, Vector3.new(MousePosition.X, RootPosition.Y, MousePosition.Z))
end

RunService:BindToRenderStep("RotateToMouse", 1, UpdateCharacterRotation)

This makes it so every frame the character’s HumanoidRootPart gets updated to look at the direction of where your mouse is looking while also not messing with the Y axis of your RootPart.

If you’re looking for a way to activate & deactivate this, you can make an InputService/ContextActionService bind to turn on and off a value that can be checked in the update function. It can be implemented like this:

local CanRotate = false


function UpdateCharacterRotation()
	if not CanRotate then return end -- Checks if you can rotate
	
	local RootPosition, MousePosition = HumanoidRootPart.Position, Mouse.Hit.Position
	HumanoidRootPart.CFrame = CFrame.new(RootPosition, Vector3.new(MousePosition.X, RootPosition.Y, MousePosition.Z))
end

function InputReceived(ActionName, InputState, InputObject)
	if InputState == Enum.UserInputState.Begin then
		CanRotate = not CanRotate -- Inverses the boolean
	end
end


RunService:BindToRenderStep("RotateToMouse", 1, UpdateCharacterRotation)
ContextActionService:BindAction("CharacterRotation", InputReceived, false, Enum.KeyCode.R)

I Hope this helps!

[Ariana_Grenada1 (Fate)]

Thanks! It worked really well like I expected!