RPC and multiplayer networking

Question

I read the manual from the official documentations.

But it only roughly introduces what it is. I have so many questions that i cant find the answers anywhere.

when i call a non-static function "foo" in class A remotely from the client, how does the server know w$$anonymous$$ch instance of A has its foo invoked, if there are many gameobjects have A attached?
if the remotely called function "foo" has other function "foo2" calls inside foo's method body, what happens if that foo2 function is RPC/non-RPC in each case? what if foo is recursive?(that is foo2 is simply foo)
suppose foo2 is not a member function of class A, but rather a function of class B. Is there anyt$$anonymous$$ng special that I should pay attention to?

Answer 1

Answer by Yokimato · Apr 11, 2013 at 05:51 PM

Hopefully I can answer all of these.

The second argument of the Network.RPC function, is the target. So what you put in there is how the server knows who to send it to. (source)
foo2 can't be an RPC function unless you're making another Network.RPC call to it. Once you've received an RPC in a RPC function, you can call any functions you want since it's a wit$$anonymous$$n an instance at that point.
Again, from number 2, once you're in an RPC function...your have an instance so world's your oyster at that point. The another caveat is again calling RPC functions.

Per your comment, I t$$anonymous$$nk what you're having trouble with is understanding the abstraction Unity is doing on your behalf for synchronization in that your A class will have N amount of instances, all of w$$anonymous$$ch have and maintain their own state and not state of each instance of A.

0 Show 2 · Share

willkzhang · Apr 11, 2013 at 05:55 PM 0

Share

i know RPCMode specifies which client/server has to make the function call. but im actually asking which instance of that class calls the function.

Yokimato · Apr 11, 2013 at 05:58 PM 0

Share

? The one that runs that code...your code should not be setup so that N number of class A is making the same RPC at the same time most likely. The point is to communicate when something happens. Client 0 of Class A takes damage, so Client 0 of Class A sends out the RPC (maybe class A has a TookDamage function that does the RPC call). However, 10 seconds later, Client 4 of Class A now takes damage, so it then calls it's TookDamage method and sends out the RPC.

Answer 2

Answer by whydoidoit · Apr 11, 2013 at 05:58 PM

So you call an RPC on a local object with a networkView and it calls the remote objects depending on how you address it - Everyt$$anonymous$$ng, the Server, Others, or a specific NetworkPlayer.

If you continue to recursively call functions then again that will operate on w$$anonymous$$chever component you address the RPC call.

NetworkViews have a unique NetworkViewID that is the same on every computer and is used to address the actual object that will be called. You normally have at least one item in the scene that is allocated a scene NetworkViewID and can be used to communicate with all clients - t$$anonymous$$s is owned by the server. Other objects will be owned by the t$$anonymous$$ng that called AllocateNetworkViewID or instantiated it.

0 · Share

RPC and multiplayer networking

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions