Purpose of UFUNCTION, UPROPERTY, UCLASS macros

[anonymous_user_69853c21]

Hello. All I can find about this macros is a small note in fps tutorial:

By itself, the UFUNCTION macro makes the engine aware of these functions, so that they can be included in serialization, optimization, and other engine functionality. You may also have noticed the UCLASS macro above your new FPSGameMode and FPSCharacter class declarations, which does the same thing but for classes, and there is also a UPROPERTY macro for properties. There are a number of specifiers you can supply to these macros to change the function, class, and property behaviors in the engine, which can be found in ObjectBase.h.

I tried remove all this definition from my code - everything compiles and work fine. So what are they? Should I use them everywhere? For example, the BeginPlay() is not decorated with macro.

[Dig_Squid]

Check out this blog post that Michael did, its a great intro to how the Unreal property system works:

Unreal Property System (Reflection)

[anonymous_user_69853c21]

Oh, thank you, didn’t see this post.

[Shadow.Storm]

There’s also the Gameplay Programming Reference documentation, which goes over the keywords you can supply to each macro. We’re working on adding more information and examples to this section soon, but hopefully it will be a useful starting point!

[ChaoSXDemon]

If a parent class has say BlueprintType in the UCLASS macro … would a sub-class automatically be BlueprintType without declaring that in its UCLASS macro?

[Gameartist3d]

From what I’ve read on Class Specifiers, it seems to be dependent on which specifier you use. I could be wrong though, I’m new.