Raycast returns nil unless it intersects with a part

[beanandsoupguy]

I’m trying to constantly get the user’s mouse location on mobile.

The issue is, Mouse.Hit only changes it’s value when UserInputService.TouchTap is fired.

I came to the solution of using Camera:ViewportPointToRay(). But unless the ray intersects with an object no position is returned.

local UserInputService = game:GetService("UserInputService")
local Camera = workspace.CurrentCamera

UserInputService.TouchMoved:Connect(function(Input)
	local Position = Input.Position
	local ViewportRay = Camera:ViewportPointToRay(Position.X, Position.Y)
	if ViewportRay then
		local RaycastResult = workspace:Raycast(ViewportRay.Origin, ViewportRay.Direction * 1000)
		if RaycastResult then
			--3d position is returned
		else
			--no 3d position is returned
		end
	end
end)

[beanandsoupguy]

raycast.Position is nil

Previous to my old issues with this, this seems like the only thing that is blocking the tool from actually functioning. The main objective is to create a working gun and I’ve completed the majority of it, but this line of code errors whenever it is cast in specific spots like the sky and returns nil. I, unfortunately, can’t provide a screenshot of the error as it is silently rendered. and won’t show up. local dist = (tool.Muzzle.CFrame.Position - raycast.Position).magnitude Everything else …

[beanandsoupguy]

Was doing raycast again and had a similar issue and thought about this thread.
In my previous solution it said to use workspace:FindPartOnRay which is deprecated and was at the time so I’ve come back to provide a better solution.

Of course the ray cast returns nil, it didn’t intersect with anything what else would it return? In this script all I wanted was a 3d position so here is an updated solution that always returns a Vector3 and does not use the deprecated function

local UserInputService = game:GetService("UserInputService")
local Camera = workspace.CurrentCamera

UserInputService.TouchMoved:Connect(function(Input)
	local Position = Input.Position
	local ViewportRay = Camera:ViewportPointToRay(Position.X, Position.Y)
	if ViewportRay then
		local Direction = ViewportRay.Direction * 1000
		local RaycastResult = workspace:Raycast(ViewportRay.Origin, Direction)
		if RaycastResult then
			return RaycastResult.Position
		else
			return ViewportRay.Origin * Direction
		end
	end
end)