tidal girder
Is there a way to add Entity Components in a generic way? I'm trying to achieve an RPC call that will say "Hey, add this entity component to this ghost entity"
Right now I'm just making specific RPCs that will do it, but I'd like to be able to send something like a string and the receiver would add it that way. Only way I can think of is by using reflection on the receiving end.
mint garnet
You could send the ComponentType index. Although It's possible that you'd need to obtain the StableTypeHash of that ComponentType and use that.
odd token
Luis gomez is right on with how you can do this (i'd suggest stable hash just to be sure)
Though what you suggest is actually pretty dangerous
What stops a malicious actor just telling the server to add an invulnerability component to their character
Or to add an isdead component to an opponent
mint garnet
I think that's more about the server logic. You could just ignore messages from unauthorized sources. But indeed is something to think about, and be careful
icy jasper
Yeah, this is server->client RPC. Oh I see, you're thinking about someone hacking the server.
What does it mean to obtain the StableTypeHash of a ComponentType?
mint garnet
The StableTypeHash is the "code" used to identify a ComponentType in a deterministic way. The ComponentType index is not stable between editor and build and because I don't fully understand in which cases is stable, I'm suggesting to consider using StableTypeHash instead.
You can get StableTypeHash like this
TypeManager.GetTypeInfo(componentType.TypeIndex).StableTypeHash
mint garnet
Yeah, this is server->client RPC. Oh I see, you're thinking about someone hackin...
Yeah, if anyone can add/remove components to entities in other clients or even the server, that would be dangerous. This kind of functionalities should be implemented carefully.
magic swift
Note that replication will not work if you add replicated components at runtime (because NetCode won't know it needs to serialize these new components).
If you do want to create dynamic ghosts at runtime, it's a little more involved. See: https://forum.unity.com/threads/about-ghost-spawning-and-components-synchronization.1488807/
icy jasper
The components I want to add are not ghost components, but thanks for the info. I didn't think it was possible at all to add ghost components at runtime.