local QuatEpsError = 1E-2

function SurfaceNormalToRightHanded(normal, camera)
    local rotation
    if math.approx(math.abs(normal.z), 1.0, QuatEpsError) then
        rotation = Quaternion.LookRotation(normal, vector3.right)
    else
        rotation = Quaternion.LookRotation(normal, vector3.up)
    end

    --[[
        The surface is roughly upwards/downwards, rotate the decal in such a
        way that it faces towards the specified camera.
    --]]
    if camera and math.approx(math.abs(normal.z), 1.0, QuatEpsError) then
        local offset = math.sign(normal.z) * (camera:Rotation().z - Quaternion.ToEuler(rotation).z)
        rotation = rotation * Quaternion.Euler(0.0, 0.0, offset)
    elseif math.approx(normal.y, 1.0, QuatEpsError) then
        rotation = rotation * Quaternion.Euler(0.0, 180.0, 0.0)
    end
    return result
end