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Get Overlapping Actors dont return all actors

The Blueprint and Picture should speak for it self ... The OnPickedUp function just calls Destroy Actor ...

I Pickup this Items on spacebar press. The Pickup itself is working but I dont pick up all Items in range. The ingame Screenshot show a much too big Box Collision(its almost bigger than the level itself to ensure all items are in) ... all Items are within it! Now when i hit spacebar some items dissapear BUT NOT ALL they dissapear in a distinct order and i can make them all dissapear by just hitting space a few times and i dont even have to move so the Box isnt moving.

I dont get why they are not found all in the first spacebar press ... Am I missing something on this simple blueprint ?

https://answers.unrealengine.com/storage/temp/38275-blueprint.png https://answers.unrealengine.com/storage/temp/38276-game.png

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asked Apr 10 '15 at 12:32 AM in Bug Reports

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Hi L1ne,

Thank you for the report. I was easily able to reproduce the issue so I have created JIRA report UE-13672. Our developers will be investigating it further and we will post back here with updates as we have them.

As a workaround, I noticed that if you add the overlapped actors to an Array then loop through that array, it will work correctly.

alt text

Let me know if that works for you.



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answered Apr 10 '15 at 05:11 PM

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avatar image L1ne Apr 10 '15 at 10:39 PM

Works now with the array.


avatar image TJ V ♦♦ STAFF Apr 13 '15 at 01:50 PM


I've been working with one of our devs on this and he explained that this is a common misunderstanding and the expected behavior of the GetOverlappingActors array.

The array that's created by the GetOverlappingActors node isn't 'set' like a standard array. The size can be changed each time a ForEachLoop is iterated. Because of this, with each loop the array size changes leaving behind some of the overlapped objects. This is a little hard to explain in just text so if you would like me to go into further detail, just let me know.

Anyways, the workaround that I gave you isn't a workaround, it is actually the correct way to implement this.



avatar image cgrebeld Oct 09 '15 at 06:31 PM

I would very much like to hear more details about this! I assume it applies to all functions that have an output TArray parameter? In what case would this array be changed as you loop over it?

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