Help making Camera follow mouse in roblox studio

Help and Feedback Scripting Support
#1

Hello! Does someone know why is my camera not following the mouse? Something strange is happening; when I move the mouse, the camera doesn’t follow it, and I would like to fix that so that my first-person mode works properly. Can someone give me a hand, plz? :frowning:

-- CameraSwitchModule

local CameraSwitchModule = {}

-- Constants
local FIRST_PERSON = Enum.CameraType.Scriptable
local THIRD_PERSON = Enum.CameraType.Custom

-- Variables
local player = game.Players.LocalPlayer
local currentCameraType = FIRST_PERSON

-- Functions
local function updateFirstPersonCamera()
	-- Get the player's character and camera
	local character = player.Character
	local camera = workspace.CurrentCamera
	local RunService = game:GetService("RunService")
	local UserInputService = game:GetService("UserInputService")

	-- Check if the character and camera exist
	if character and camera then
		-- Get the character's head
		local head = character:FindFirstChild("Head")

		-- Check if the head exists
		if head then
			-- Set the camera subject to the head
			camera.CameraSubject = head
			camera.CFrame = head.CFrame * CFrame.new(0, 0, -5) -- Adjust camera offset as needed

			-- Change the camera type to Scriptable
			camera.CameraType = Enum.CameraType.Scriptable

			-- Make the head and its descendants transparent
			local function makeTransparent(part)
				if part:IsA("BasePart") then
					part.LocalTransparencyModifier = 1
				end
				for _, child in pairs(part:GetChildren()) do
					makeTransparent(child)
				end
			end
			makeTransparent(head)

			-- Make accessories transparent
			for _, accessory in pairs(character:GetChildren()) do
				if accessory:IsA("Accessory") then
					for _, part in pairs(accessory:GetDescendants()) do
						if part:IsA("BasePart") then
							part.LocalTransparencyModifier = 1
						end
					end
				end
			end

			-- Variables for mouse movement
			local sensitivity = 0.01
			local acceleration = 10
			local maxSpeed = 5
			local speed = 0
			local lastMousePosition = Vector2.new()

			-- Before every frame is rendered, call this function
			RunService.RenderStepped:Connect(function(deltaTime)
				if currentCameraType == FIRST_PERSON then
					-- Get the current mouse position
					local currentMousePosition = UserInputService:GetMouseLocation()

					-- Calculate the change in mouse position
					local delta = currentMousePosition - lastMousePosition

					-- Accelerate the camera rotation
					speed = math.clamp(speed + acceleration * deltaTime, 0, maxSpeed)

					-- Adjust the camera orientation based on mouse movement and speed
					local rotationY = math.rad(delta.x * sensitivity * speed)
					local newCFrame = CFrame.Angles(0, rotationY, 0)
					camera.CFrame = head.CFrame * newCFrame

					-- Update the last mouse position
					lastMousePosition = currentMousePosition
				end
			end)
		end
	end
end

local function updateThirdPersonCamera()
	-- Get the player's character and camera
	local character = player.Character
	local camera = workspace.CurrentCamera

	-- Check if the character and camera exist
	if character and camera then
		-- Set the camera as a descendant of the character's humanoid root part
		local humanoidRootPart = character:FindFirstChild("HumanoidRootPart")
		if humanoidRootPart then
			camera.CFrame = humanoidRootPart.CFrame * CFrame.new(0, 5, -10) -- Adjust camera offset as needed
		end
	end
end

function CameraSwitchModule.SetFirstPersonWithMouse()
	-- Set the camera to first person
	game.Workspace.CurrentCamera.CameraType = FIRST_PERSON
	currentCameraType = FIRST_PERSON

	-- Set the camera as a descendant of the head
	updateFirstPersonCamera()
end

function CameraSwitchModule.SetThirdPerson()
	-- Set the camera to third person
	game.Workspace.CurrentCamera.CameraType = THIRD_PERSON
	currentCameraType = THIRD_PERSON

	-- Set the camera as a descendant of the humanoid root part
	updateThirdPersonCamera()
end

function CameraSwitchModule.ToggleCamera()
	-- Toggle between first and third person
	if currentCameraType == FIRST_PERSON then
		CameraSwitchModule.SetFirstPersonWithMouse()
	else
		CameraSwitchModule.SetThirdPerson()
	end
end

return CameraSwitchModule

video:

1 Like
#2

The problem with that was that you were setting the cameras CFrame back to the players head, which wasn’t getting turned when you moved the mouse, so it wouldn’t move the camera. I believe this script should fix that issue:

RunService.RenderStepped:Connect(function(deltaTime)
   if currentCameraType == FIRST_PERSON then
      local currentMousePosition = UserInputService:GetMouseLocation()
      -- Calculate the change in mouse position
      local delta = currentMousePosition - lastMousePosition
      speed = math.clamp(speed + acceleration * deltaTime, 0, maxSpeed)
      local rotationY = -(math.rad(delta.x * sensitivity * speed)) --added -() around the math.rad() because it was moving the camera backwards.
      local newCFrame = CFrame.Angles(0, rotationY, 0)
      workspace.CurrentCamera.CFrame = head.CFrame
      player.Character:PivotTo(player.Character.PrimaryPart.CFrame * newCFrame)
      lastMousePosition = currentMousePosition
   end
end)

I made it so that the player is turned with the mouse movement so that when the camera’s CFrame changes back to the head, it will not be in the same orientation again and it will be different. Test it out and let me know how it works.