OMF:BG Message Board

raptor · Posted: Tue Jul 16, 2013 9:44 am Post subject:

And much MineCraft was had :p
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- Jon Eirik * www.omf2097.com * www.omf2097.com/wiki * https://discord.gg/sT8YU2E <- OMF Discord

katajakasa · OpenOMFdev Joined: 17 Jan 2013 Posts: 72

Vagab0nd · OpenOMFdev Joined: 30 Dec 2005 Posts: 61

So, I added experimental network play:

http://www.youtube.com/watch?v=5e5eyEhJLs8&feature=youtu.be

Was able to play over the net (with a simple little port forward config) with katajakasa and huntercool.

The network protocol isn't final by any means, but the proof of concept is there, and it is still kind of fun (or it would be if the physics engine didn't crash the game every time you triggered a projectile or did a throw).

Andrew

katajakasa · OpenOMFdev Joined: 17 Jan 2013 Posts: 72

raptor · Posted: Sun Jul 28, 2013 5:24 pm Post subject:

*is dreaming happy murder dreams*
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- Jon Eirik * www.omf2097.com * www.omf2097.com/wiki * https://discord.gg/sT8YU2E <- OMF Discord

Vagab0nd · OpenOMFdev Joined: 30 Dec 2005 Posts: 61

I fought the raptor and... I don't know who won:

http://www.youtube.com/watch?v=0VQ2cGYt4hs&feature=youtu.be

Andrew

Malfrex · Posted: Sun Jul 28, 2013 9:32 pm Post subject:

I quite like how you keep posing for the win and he just kept attacking Smile

I'm guessing its more of a state issue than a sync issue?
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Vagab0nd · OpenOMFdev Joined: 30 Dec 2005 Posts: 61

Yes, the network protocol is super-simple right now and doesn't really account for anything other than position and what the HAR is currently doing. Hit detection and stuff is all only client side, so Raptor lost on my side but not on his side, so he kept going (and I kept getting stuck in the victory pose and not be able to fight back). I don't know a lot about video game network protocols, so this was just the easiest thing to implement to play with.

Contributions are welcome Wink

Andrew

raptor · Posted: Mon Jul 29, 2013 6:48 am Post subject:

Really a pity that I couldn't record my side, or you would have seen a completely different game :p

I pulled out at least 10 more flying spike attacks at the end than what you can see there. Totally fucked up, drunken brawling ftw! You so gotta add a drunken brawling mode to this game so I can replay this monsteriosity!
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- Jon Eirik * www.omf2097.com * www.omf2097.com/wiki * https://discord.gg/sT8YU2E <- OMF Discord

Malfrex · Posted: Mon Jul 29, 2013 1:48 pm Post subject:

Personally I haven't done a lot of asynchronous networking coding. What you might want to look at is implementing some form of state machine; ie rather then just passing inputs through there's a timestamp as well. The problem is you have to do a bit of predictive coding based on previous input then if the actual data comes through, compare against it. Otherwise you'll end up with a problem of both players seeing a different game occurring.

Likely you'll have to create a dedicated server running on the host machine that uses the latency to the remote machine to determine an average "movement buffer", then have the client perform predictive movement.

http://gafferongames.com/networking-for-game-programmers/what-every-programmer-needs-to-know-about-game-networking/

That's a decent explanation of how it would work (last ~third of the article). Coding it, however, is something I never got around to learning how to do.
_________________
I'm not crazy, I'm sanity-challenged.

ASUS P8Z77-V PRO
i7 3770k (will OC @4.5Ghz)
2x8GB G.SKILL DDR3-2600
MSI 7970 3GB
Crucial M4 128GB
~10.9TB RAID 5 (4x 4TB)

Arkl1te2 · Joined: 21 Jan 2013 Posts: 7

Almost 20 years passed, and characters are still wondering..

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Jaguar, Shredder, Flail, Nova.

Malfrex · Posted: Tue Jul 30, 2013 9:03 am Post subject:

Vagab0nd · OpenOMFdev Joined: 30 Dec 2005 Posts: 61

Thanks for the link Malfrex, I'd googled but not found anything quite so well presented. I think I know how to make a decent network protocol now. Once we get this massive physics engine rewrite done I'll give it another shot.

Andrew