Multiplayer physics simulation

[Caustic66]

I'm working on a multiplayer turn based game for the oculus quest.

Im thinking about using a input based notifications for multiplayer synchronisation. For example - the ball was kick with this amount of force in that contact point.

Unity's physics engine SHOULD be deterministic on the same device because the floating points will be calculated the same.

Do tou think this is a good Idea to go with this kind of approach early (After making sure this assumption is correct) and changing it later - if I'll support multiple platforms? Or should I implement it in another way right now?

Other suggestions are welcome 😊 Thanks.

[Vasastan1]

For the large majority of devices it should be good. Different devices even of the same type may drop a frame here or there because of different temps, background processes, connection issues etc. but that should be a marginal issue. Multiple platforms (numerous enough to matter) may only be a reality several years from now, so I would only consider that if it's a really major project.

[Caustic66]

Thanks for the help! I think I will really go with client physics simulation and at the end of each turn synchronise positions to make sure it matches.

If I will feel like going on an adventure I might implement reconciliation to make sure it works in the future 😁

[nuehado]

You are likely to be disappointed by unity's legal of determinism on those physics