I am trying to understand how networking in games work as I am trying to make an online game myself. I can't grasp how it is possible to synchronize the players, in order to make the game deterministic. I found an article saying this:
in order to ensure that the game plays out identically on all machines it is necessary to wait until all player’s commands for that turn are received before simulating that turn. This means that each player in the game has latency equal to the most lagged player.
This makes sense and I also came to the same conclusion after hours of drawing graphs with various scenarios. However, there are some games where one player can have 500ms delay, and another player could have 40ms delay. In this case, how is the game deterministic ?
Lets name players with
500ms delay: Player40, Player500
Lets say that Player40, shoots Player500 with an instant laser shot at T1 = 0ms. Exactly 40ms after the Player40 actually clicked with his mouse to shoot (so T2 = 40ms), The "laser shooting event" registered on the server and returned "ok, you can execute laser shoot" to Player40. So, the shot is being applied on Player40's machine and on his screen he sees that he killed Player500, and the corpse is lying on (x1,y1,z1).
Meanwhile, what happened on Player500's machine, was that Player500 was running straight. A few moments later he sees a laser a few feet behind him, he dies even though the laser didn't hit him, and his corpse is lying on (x2,y2,z2).
Since this scenario never happens in some games, does this mean that those games are deterministic ? How is something like this possible, without forcing all players to get a delay equal to the delay of the most lagging player ?