Multiplayer LAG - GameCreators Forum

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Lucka

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Joined: 1st Oct 2004

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Posted: 10th Sep 2014 21:23

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Hello, i am writing a TWO player game using Multisync.

It works properly, everithing's fine.
I will show it in WIP asap.

But..

I get a "spike" lag during game, something like SOMETIMES data sending/receiving is interrupted for a couple of seconds (every 40/50 seconds).

There's a way to properly send/receive, or a better setup, or a GURU of Multisync, somewhere in this forum?

Some suggestion?

Lucka - gawteam coder - www.gawgames.com

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Rudolpho

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Joined: 28th Dec 2005

Location: Sweden

Posted: 11th Sep 2014 01:56

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It is hard to say what might cause that. Perhaps you have a memory leak in a buffer somewhere and it needs to reallocate resources behind the scenes causing some network stalling? If possible I would probably start by debugging things like that.
You probably should show your networking code, or at least the section that seemingly causes the trouble, though. Otherwise there's really no way to do more than guess at what the problem might be; I don't think it is anything inherent in MultiSync itself.

"Why do programmers get Halloween and Christmas mixed up?"

+ Code Snippet

Because Oct(31) = Dec(25)

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Ortu

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Joined: 21st Nov 2007

Location: Austin, TX

Posted: 11th Sep 2014 03:16

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If you are using timer based movement / updates, you should be able to handle small lag spikes gracefully with interpolation and client side prediction. In quick, general terms, each player should have the data needed to predict where everyone will be in the next second or two, like speed and direction, and when this prediction differs from the official positions coming from host or server, it can gradually correct to match over a couple of loops so there is less pausing, snapping, and rubber banding.

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Lucka

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Posted: 11th Sep 2014 22:12

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Code is actually send stuf like this:

while net get message()
         xnemi# = net get float()         : rem Posizione X aereo nemico
         ynemi# = net get float()         : rem Posizione Y aereo nemico
         anemis = net get int()           : rem Angolo areo nemico
         xpronemi# = net get float()      : rem Posizione X proiettile nemico
         ypronemi# = net get float()      : rem Posizione Y proiettile nemico
         apronemis = net get int()        : rem Angolo X areo nemico
         bonus_sub = net get int()        : rem Bonus in arrivo dal nemico
         xmissnemi# = net get float()     : rem Posizione X missile nemico
         ymissnemi# = net get float()     : rem Posizione Y missile nemico
         amissnemis = net get int()       : rem Angolo Z missile nemico
         vita_bombo_nemi = net get int()  : rem vita bombo nemico
         presocolpo = net get int()       : rem Nemico colpito
         presomissile = net get int()     : rem Nemico colpito
         minanex = net get int()          : rem Posizione X mina nemica
         minaney = net get int()          : rem Posizione Y mina nemica
      endwhile

+ Code Snippet

      while net get message()
         xnemi# = net get float()         : rem Posizione X aereo nemico
         ynemi# = net get float()         : rem Posizione Y aereo nemico
         anemis = net get int()           : rem Angolo areo nemico
         xpronemi# = net get float()      : rem Posizione X proiettile nemico
         ypronemi# = net get float()      : rem Posizione Y proiettile nemico
         apronemis = net get int()        : rem Angolo X areo nemico
         bonus_sub = net get int()        : rem Bonus in arrivo dal nemico
         xmissnemi# = net get float()     : rem Posizione X missile nemico
         ymissnemi# = net get float()     : rem Posizione Y missile nemico
         amissnemis = net get int()       : rem Angolo Z missile nemico
         vita_bombo_nemi = net get int()  : rem vita bombo nemico
         presocolpo = net get int()       : rem Nemico colpito
         presomissile = net get int()     : rem Nemico colpito
         minanex = net get int()          : rem Posizione X mina nemica
         minaney = net get int()          : rem Posizione Y mina nemica
      endwhile

i didn't wrote NOTHING at all about "synchronization"
just GET and PUT..

i am a TOTAL NOOB about TCP and all that stuff, it works for 30 seconds, than LAG then again working for 30 or 40 seconds..

i think that MAYBE GET this amount of "float" is too much, i wanna try to make the "weight" a little bit more light using INT instead of FLOATs..

how Multisync make the "sync" between GET and PUT?

I am a total noob