Just when i thought i knew a lot about replication...

[coldscooter]

I have a simple actor class (extending from Actor.uc) with a mesh in my world that I'm replicating so that all clients can see it. Here's what's in it's def props:

    bOnlyDirtyReplication=true
    NetUpdateFrequency=8
    RemoteRole=ROLE_SimulatedProxy
    bHidden = false
    NetPriority=+1.4
    bStatic=false
    bNoDelete=false
    bGameRelevant=true

It seems to replicate fine and all clients can see it. However when I update it's location on the server, this doesn't replicate to clients. If i update the location in the same call while spawning it in, the clients receive this fine, but after that the location never replicates.

Could anyone shed any light on why location isn't replicating after the initial spawn?

[RattleSN4K3]

//-----------------------------------------------------------------------------
// Network replication.

replication
{
    // Location
    if ( (!bSkipActorPropertyReplication || bNetInitial) && bReplicateMovement
                    && (((RemoteRole == ROLE_AutonomousProxy) && bNetInitial)
                        || ((RemoteRole == ROLE_SimulatedProxy) && (bNetInitial || bUpdateSimulatedPosition) && ((Base == None) || Base.bWorldGeometry))) )
        Location, Rotation;

bUpdateSimulatedPosition.

[coldscooter]

Thanks for pointing that out @RattleSN4K3. I've just tried that and Location is still not replicating. Here is a simple version of my actor class:

class MyExampleActor extends Actor;

var StaticMeshComponent Mesh;

//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
//Example method to move the actor in the world
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
function MoveMe()
{
    SetLocation(Location + vect(0, 100, 0));
}


defaultproperties
{
    Begin Object class=StaticMeshComponent Name=StaticMeshComp
        StaticMesh=StaticMesh'Meshes.MyStaticMeshes.MyMesh'
    End Object
    CollisionComponent = StaticMeshComp
    Mesh = StaticMeshComp
    Components.Add(StaticMeshComp)

    bOnlyDirtyReplication=true
    NetUpdateFrequency=8
    RemoteRole=ROLE_SimulatedProxy
    bHidden = false
    NetPriority=+1.4

    bUpdateSimulatedPosition = true
    
    bStatic=false
    bNoDelete=false

    bCollideActors=true
    bBlockActors=true
    bWorldGeometry=true
    bGameRelevant=true
    bCollideWorld=false
    BlockRigidBody=true
}

I've verified that MoveMe() is getting called on the server, however Location doesn't replicate to the client. Any ideas on what i'm missing here?

Thanks again for the help.

[coldscooter]

I figured out that if I set bOnlyDirtyReplication = false, then Location replicates fine.

This is a little confusing though as i would think that Location would count as dirty replication, as the server would know that the value is changing from what the client has.

[evr]

This is just a guess, but maybe bNetDirty isn't set to true when you change Location with a native function (SetLocation). It is native C++ code that actually changes the variable. And by setting bOnlyDirtyReplication to true you're telling the server to NEVER replicate unless bNetDirty is true.

[evr]

Just out of curiosity... If you add an integer variable to your class and have it replicated with just condition bNetDirty, and then have it increased by 1 in your MoveMe(), does Location get replicated or just your new variable? With bOnlyDirtyReplication set to true, I mean.