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"

Office Holiday

Epic Games' offices will be on holiday from June 22nd to July 7th. During this period support will be limited. Our offices will reopen on Monday, July 8th. 

Clean way to manage groups of AActors?

For efficiency, I'd like to have "groups" of AActors. I'm not talking about "grouping" in the UE4 sense, I just mean assigning objects to lists. For example:

  • Actors_that_move

  • Actors_with_hitpoints

  • Actors_with_AI

And so on. So there's a lot of overlap, meaning a given actor is in several of these groups.

The tricky part is that when an actor is destroyed, it needs to be immediately removed from all groups so that no one tries to access it. My first thought was to use shared pointers and weak pointers, since this is exactly the problem they're meant to solve. But UE4 does not necessarily delete an object when it's destroyed, meaning all the weak pointers will still be valid for some unknown number of ticks.

So is there a better approach to this? I guess the brute force solution would be to have every object remove itself from every group in its Destroyed() method, but that seems pretty error prone.

Product Version: UE 4.15
more ▼

asked Apr 04 '17 at 05:27 AM in C++ Programming

avatar image

70 6 10 126

avatar image Jason.J Apr 05 '17 at 04:32 PM

I've not had to solve such a scenario myself, but this strikes me as a good use case for GamePlay tags.

I haven't used them myself, but they would strike me as perfect for this, and 4.15 expanded their capabilities even further.

Sorry, but I can't give you examples on using the tags, as I've not needed to myself.

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

0 answers: sort voted first
Be the first one to answer this question
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