x

Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

How to get a Blackboard Object in C++?

I'm trying to convert my BP_GameAIController blueprint (subclass of AIController) to c++ code. I'm really new to unreal c++ programming so I need a little help.

I have a function named AIGetTargetGameChar that gets an object from the blackboard like this:

alt text

I created an AIController subclass, added the AIModule to the Build.cs file.

My Behavior tree and blackboard is created using the Editor. How sould I create a function like this in code? I noticed there is no GetBlackboard function available.

Is there an good i tutorial in c++ available? I could not find one.

Thank you.

Product Version: Not Selected
Tags:
more ▼

asked Jan 29 '15 at 03:17 PM in C++ Programming

avatar image

Ghar
707 33 107 127

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

2 answers: sort voted first

If you want to work with C++ I strongly suggest you started looking for functions in header files first. Blackboard getter you're looking for is UAIBlueprintHelperLibrary::GetBlackboard. If you're using launcher versions of UE4 you won't be able to look at the implementation details, so I also encourage you to get full sources from github for the sole purpose of reading code. If you read UAIBlueprintHelperLibrary::GetBlackboard's implementation you'd find out that it boils down to calling FindComponentByClass() on pawn's controller.

Happy reading and welcome to the demanding yet satisfying world of UE4 C++ coding! :D

Cheers,

--mieszko

more ▼

answered Jan 29 '15 at 03:27 PM

avatar image

MieszkoZ STAFF
7.4k 225 57 415

avatar image Ghar Jan 29 '15 at 03:31 PM

Cool, thanks a lot.

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

Most nodes are real functions in C++ so you can find them by searching in API refrence

https://docs.unrealengine.com/latest/INT/API/Runtime/AIModule/Blueprint/UAIBlueprintHelperLibrary/GetBlackboard/index.html

It's a static function so you should call it UAIBlueprintHelperLibrary::GetBlackboard(SomeActor);

more ▼

answered Jan 29 '15 at 03:32 PM

avatar image

Shadowriver
37.8k 937 172 1123

(comments are locked)
10|2000 characters needed characters left
Viewable by all users
Your answer
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question