Ugh, do you really have to be this nitpicky? Fine, you wrote:
> the approximation is generally good enough for a game
No, it's not generally good enough for a game – only for some games, and not good enough for any game with 3D graphics.
> the approximation is generally good enough for a game
No, it's not generally good enough for a game – only for some games, and not good enough for any game with 3D graphics.