Roblox - Fast getNormal function

-- Script made by Oysi

local pointToObjectSpace = CFrame.new().pointToObjectSpace
local vectorToWorldSpace = CFrame.new().vectorToWorldSpace

local v1 = Vector3.new(-1, 0, 0)
local v2 = Vector3.new( 1, 0, 0)
local v3 = Vector3.new(0, -1, 0)
local v4 = Vector3.new(0,  1, 0)
local v5 = Vector3.new(0, 0, -1)
local v6 = Vector3.new(0, 0,  1)

function getNormal(part, pos)
    local dif = pointToObjectSpace(part.CFrame, pos) / part.Size
    if     dif.x < -0.499 then return vectorToWorldSpace(part.CFrame, v1)
    elseif dif.x >  0.499 then return vectorToWorldSpace(part.CFrame, v2)
    elseif dif.y < -0.499 then return vectorToWorldSpace(part.CFrame, v3)
    elseif dif.y >  0.499 then return vectorToWorldSpace(part.CFrame, v4)
    elseif dif.z < -0.499 then return vectorToWorldSpace(part.CFrame, v5)
    elseif dif.z >  0.499 then return vectorToWorldSpace(part.CFrame, v6)
    end
end