Blueprint child of c++ child of actor component

Development Programming & Scripting
1

Hello,

I’ve created a c++ child class of actor component, let’s call it MyActorComponent.
It’s meant to be a base class for many other blueprint classes that I want to use for my actor.
Although, I can’t create blueprint child of MyActorComponent. The editor simply does not allow me to, saying “Cannot create a new blueprint class based on MyActorComponent”. I can create c++ one tho. Am I doing something wrong, or it’s impossible?

For clarity, what I want to do:
ActorComponent → MyActorComponent [C++] → ChildOfMyActorComponent [Blueprint]

1 Like
2

Can you create a new BP ActorComponent and re-parent it to your CustomActorComponent?

You can look at how USceneComponent was implemented, which might help:

By looking at the .h of SceneComponent, I noticed that the constructor had this macro

  • meta=(BlueprintSpawnableComponent ...)

Which is what you need for your component to be used in BPs. As confirmed by this page by rama that I found by searching for BlueprintSpawnableComponent .

I suggest you also use BlueprintType in the meta so you can pass references of your custom component.

EDIT:

Okay, found the solution by looking at VRNotificationsComponent

  • In your UClass macro use Blueprintable. And you’ll be able to make BP subclasses of your component.
2 Likes
3

Nope, it doesn’t even show in reparent list.

4

What does the code of the component look like in the header? It may require certain macros to allow it to be blueprint spawnable (Meta = (BlueprintSpawnableComponent)).

5

Updated answer, should help

6

My header do have this macro tho: UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) ) And I can use my component in a blueprint, but I want to create a blueprint that is not using, but a blueprint that is based on my custom c++ class (it’s meant to be information-only blueprint if that helps).

7

Your reply made me look into class specifiers and there I’ve found Blueprintable specifier, which is exacly what I was looking for, thanks!

8

Add Blueprintable specifier to class declaration.

UCLASS (Blueprintable, ...)
class ...
4 Likes
9

Hey, just found the same thing in VRNotificationsComponent