Is there an equivalent of #if WITH_SERVER_CODE in Blueprints?

Development Programming & Scripting Blueprint
1

Hi!

Is there an equivalent of this in BP (or about to come out?)


 void MyServerOnlyFunction()
 {
 #if WITH_SERVER_CODE
     Do Server Stuff here;
 #endif
 }

The logic in the WITH_SERVER_CODE will NOT EXIST in the client binary. that makes building dedicated servers pretty smooth.

regards

2

I don’t think so. That’s pretty “advanced” for Blueprints.

If you want to have things like these you will need to stick to C++.

Could also be wrong, but in 2+ years of UE4, I did not encounter that in BPs :stuck_out_tongue:

1 Like
3

For Blueprints you pretty much have to create classes that are never used in client; compiler directives there won’t work.
However the code will still be visible in the client source code… So in general is just better to simply build the server in C++ if security for you is a concern (ppl really will scan your game’s classes you know, I’ve seen plenty of exposed code, from ARK for example, around internet that was extracted from the game client).

4

Its really confusing a bit…

Lets say I create a “player controller class” in blueprints - and a “player controller server helper class” in c++. I can now wrap the whole server class into the server directive.
So code from the server class wont exist in the client binaries.

Can i still use the helper as variable in the player controller? What happens if i only use the directive inside a function (before return, and at the start…) and i expose it per attribute to blueprints… I probably can cast to the class in the bp and use the function but nothing will happen on client side… so i guess if i want to move the player in the function I destroyed the actual replication system a bit (since the player wont even move until the server really says hey dude u are actually here…)

Whats the best practise in regards to working with bp but still making a decently secure multiplayer but not destroy ue4 base functionality like replication…?