UnitRay
ReadOnly
This property can only be read from. Attempting to write to it will cause an error.
NotReplicated
This item is not replicated across Roblox’s server/client boundary.
The UnitRay property is a DataType/Ray directed toward the Mouse’s position in 3D space (described by Mouse/Hit). It originates from the Camera/CFrame|CFrame of the Workspace/CurrentCamera. Like all unit rays, it has a distance of 1.
local Players = game:GetService("Players")
local player = Players.LocalPlayer
local mouse = player:GetMouse()
print(mouse.UnitRay.Direction.magnitude) -- Always 1