I’ve got this flying code that I’m trying to replicate for a networked multiplayer game. It works fine locally, but, because I update the velocity vector at 60fps, I end up with some steep bandwidth requirements.
Inside of the ‘New Velocity’ collapsed node, I use player input and the previous frame’s velocity to calculate the direction & velocity of the character in-flight. This means that I have to send a ton of data upstream and that it has to be sent back downstream as well.
Wouldn’t it be better if you can make the velocity variable replicated instead of doing RPCs on such high frequency.
I don’t know about this but last I heard they were introducing NetQuantize Vectors in blueprints as well they save you bandwidth.
Lol On a different note I think we have talked before on discord regarding some dragon game called ‘Tasneem’ or something I recognize your name. maybe wrong on that.
Oh man hey yeah I remember your name! Yeah this is actually the flight code from Soar, I’m using it as a tool to teach myself networking. The game is still under development I just gave up on documenting it lol.
So the velocity variable itself is part of the CharacterMovementComponent, I don’t think I can make that replicated without messing with the engine source code, and idk how well that’d work. I could potentially break the node out into a variable, which does remove the upstream bandwidth but still retains the downstream- because the current velocity is dependent on the previous frame velocity. Even then though synchronicity remains a huge problem because any drop will cause the client-side calculation to totally lose track of the server.
Instead of calculating velocity and rotation on the client and passing it to the server I now only pass player input (on tick) and handle calculations server-side. While the Velocity variable isn’t itself replicated, the rest of the CharacterMovement component is, so I can simply set it on the server and let CMC handle replication. Rotation on the other hand has to be set client-side.
Movement is smooth as you’d expect from CMC, but rotation is choppy so I plan to implement client-side prediction algorithm at some point in the future. At least it’s playable now!
Hey man, I would really like to ask for your help and knowledge you got from replicating flight physics. I’m actually also creating a flight sim but as a mod to one milsim game and I’ve got basically one BIG function where every force is calculated in one vector which I then apply as a movement and rotation, but how to replicate all that would be 1000x worse than if replicating helicopter’s movement with movement component .
So one developer told me use my raw acceleration,roll,pitch,yaw as replicated inputs sent to the server which then are used in calculation server-side which will be the most correct one, and if there is desync from client-side I’d just interpolate to the server’s-side one …
If you have a finished replicatede logic, I would be more that apprecitive for your help, here is my discord: qurtski
yeah I remember your name! Yeah this is actually the flight code from Soar, I’m using it as a tool to teach myself networking. The game is still under development I just gave up on documenting it lol.