[Ue4] RPC, remote call

RPC

1. Remote Procedure Call: Remote program call

2. One process calls the functions of another process

Because the "server-shoot" method is marked as "running on server", even though it is opening fire in the second window (client), the output information is: SERVER: Prepare for shooting, indicates that this is running on the server.

 

On the server, the "server-shoot" method calls the "muticast-shoot" method and the "muticast-shoot" method (marked as "multi-path transfer "), therefore, the server will notify all clients to execute this method.

The results show: SERVER: All shots and client 1: All shots.

Because "Run dedicated server" is not checked, the first window is both a server and a client. When "Multi-Channel Transmission" is used, messages are sent to the client itself, therefore, "server: All shots" is displayed"

2. remotely call actor ownership.

1. If you use the get all actors of class function to obtain the role instance controlled by Client A, assign a value to the "server-shoot" method marked as "running on server" (the target is self by default ), run on client B (assign the client B instance to the target parameter "server-shoot"). The server does not perform this operation and is discarded, of course, it will not be spread to other clients.
2. However, if the server calls the "server-shoot" method marked as "running on the server" on the server, no matter who the target parameter of "server-shoot" is assigned, it will be executed, it will also be spread to other clients.

 

The table below summarizes where specific RPC types will be executed based on the ownership of the actor that executes the call (the leftmost column.

RPC called by the slave server

Actor ownership	Not copied	NetMulticast	Server	Client
Client-owned actor	Run on the server	Run on the server and all clients	Run on the server	Run on the client to which the actor belongs
Server-owned actor	Run on the server	Run on the server and all clients	Run on the server	Run on the server
Unowned actor	Run on the server	Run on the server and all clients	Run on the server	Run on the server

RPC called from the client

Actor ownership	Not copied	NetMulticast	Server	Client
Owned by invoking Client	Run on the client that executes the call	Run on the client that executes the call	Run on the server	Run on the client that executes the call
Owned by a different client	Run on the client that executes the call	Run on the client that executes the call	Discard	Run on the client that executes the call
Server-owned actor	Run on the client that executes the call	Run on the client that executes the call	Discard	Run on the client that executes the call
Unowned actor	Run on the client that executes the call	Run on the client that executes the call	Discard	Run on the client that executes the call

For more information about RPC Remote calls see the official documentation: http://api.unrealengine.com/CHN/Gameplay/Networking/Actors/RPCs/index.html

[Ue4] RPC, remote call