How to: Mouse move camera when mouse reaches screen border

[lop3rz (Cheesegrater)]

I currently have an Isometric style camera, however i’m currently trying to make it so when the mouse passes for example 75% of the screen, the camera will shift slightly in the direction of the mouse.

When mouse crosses 70% of screen on x axis I want it to shift the camera, what are the steps i need to do to accomplish this?

Current camera script:

RunService.RenderStepped:Connect(function()
	if character then
		if character:FindFirstChild("Head") and character:FindFirstChild("HumanoidRootPart") then
			game:GetService("SoundService"):SetListener(Enum.ListenerType.ObjectCFrame, character.Head)
			
			camera.CFrame =
				CFrame.new(Vector3.new(character.HumanoidRootPart.Position.X + zoom, character.HumanoidRootPart.Position.Y + zoom, character.HumanoidRootPart.Position.Z + zoom), character.HumanoidRootPart.Position)
		end
	end
end)

[childsai]

I never actually saw this be done before. I dont believe you can do what you’re trying to do.

[lop3rz (Cheesegrater)]

It’s probably possible but just not sure where to begin never made anything like this so its a bit out of my zone, If you’re familiar with project zomboid, a steam game, that camera system is what i’m aiming for mainly

[PhoenixRessusection (PhoenixCausesOof)]

A LocalScript in StarterCharacterScripts:

local RunService = game:GetService("RunService");
local UIS = game:GetService("UserInputService");

local character = script.Parent;
local humanoidRootPart: BasePart = character.HumanoidRootPart;

game:GetService("SoundService"):SetListener(Enum.ListenerType.ObjectCFrame, character.Head)

local camera: Camera = workspace.Camera;
camera.CameraType = Enum.CameraType.Scriptable;

local fraction: number = 0.7; -- how much of the screen (0.7 = 70%)
local remainders: number = (1 - fraction) / 2;
local step = 3; -- greater = narrower view, smoother
				-- smaller = wider view, less smooth

RunService:BindToRenderStep("CustomCamera", 200, function()
	local viewportSizeX: number = camera.ViewportSize.X;
	
	local zoom: number = 20;
	
	local bound1: number = viewportSizeX * remainders;
	local bound2: number =
		viewportSizeX * fraction + viewportSizeX * remainders;
	
	local lookAt: CFrame = CFrame.new(humanoidRootPart.Position + Vector3.new(zoom, zoom, zoom), 
		humanoidRootPart.Position);

	local mouseX = UIS:GetMouseLocation().X;

	camera.CFrame = lookAt;

	if mouseX <= bound1 then
		local offset = math.sqrt(bound1 - mouseX);
		offset /= step;
		camera.CFrame += Vector3.new(-offset, 0, offset);
	elseif mouseX >= bound2 then
		local offset = math.sqrt(mouseX - bound2);
		offset /= step;
		camera.CFrame += Vector3.new(offset, 0, -offset)
	end	
end)