Exposing ability system's target data actor delegate to blueprints

Development Programming & Scripting C++
1

Hello, I posted this question to answers first but that seems to be mostly dead based on what I’ve seen. So let’s try here. To avoid repeating myself from the linked post I give a short synopsis of what I am trying to do:

I have a target data actor class in C++ where I declare and call a delegate. I want that delegate to be exposed in blueprint when spawning the actor via Wait Target Data blueprint node. This does not work - the delegate pin does not appear. Intention for this delegate is to broadcast at regular intervals for the duration of the actor’s lifetime. Please let me know if I am using a wrong pattern for that or missing something in my code. And if you can - post the answer to the answers website since it seems to be more searchable than forums so it’s more likely to help people that way.

2

Ok, I have never tried that, but wisdom says that you can declare the delegate by usual means, for instance


DECLARE_DYNAMIC_MULTICAST_DELEGATE_SixParams( FComponentBeginOverlapSignature, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex, bool, bFromSweep, const FHitResult &, SweepResult);

and then declare the variable in the target Actor as follows



UPROPERTY(BlueprintAssignable, Category="Collision")
FComponentBeginOverlapSignature OnComponentBeginOverlap;

in order to make it Blueprint accessible.

More description on Delegates (with examples) are here Delegates | Unreal Engine Documentation.

3

Thanks, I know. If you read the linked question it shows there that I have done just what you said. It doesn’t work in this case.

4

I do not like doing this, but I have to bumb the thread as this is a hard blocker to my progress and there’s so little information on anything related to ability system, that I think it’s also very valuable to the community to have this (and other questions like this) resolved. It’s not hard to reproduce. Maybe someone from epic games can help?

5

Multicast Delegates cannot be exposed as property pins like that, which is why you get the error with the New Object node.

6

Ok good to know, I guess?

So is there anything actionable that anyone can say about this?