pending kill "ruining" my BP logic.

[u/TheVisualCast]

so on begin play, im getting all actors with a tag, making an array and applying a constraint to all actors in the array.
then in game i have a variable that sets the linear and angular drive of the constraint in a loop to that array.
so i can essenatily have a spring like effect, and turn it on and off.

ocasiuonaly when im going from 0 drive to 1 (for example) some objects dont react, unless they are "pushed/moved".

then when i exit play i get the obect X was pending kill or garbage, menaing for some reason that object is being recognized as destroyed or whatnot, and then its being removed from the array?
but why? and how do i avoid this, thanks!!

SOLVED: I added a wake all rigid bodies and now its solved

[u/[deleted]]

If there is a pending kill then you would have a destroy actor node in there. Unreal Engine has a "lifespan" setting that can be used instead of destroy actor. It's located in the actor BP.

[u/TheVisualCast → u/[deleted]]

https://preview.redd.it/ub4rvpotu55e1.png?width=1387&format=png&auto=webp&s=02a3b7540b5280fec7459470a362b9c1edc4af25

so, all the actors have lifespan set to 0 and there is no destroy actor.
this is all that's happening, but some of the actors arent respecting it, and just laying "dorment"

[u/TheVisualCast → u/TheVisualCast]

the do once is irrelevnt fyi

[u/[deleted] → u/TheVisualCast]

There has to be a destroy actor somewhere Pending Kill means the object is already garbage, but still exists somewhere, but it's about to be garbage collected.

[u/TheVisualCast → u/[deleted]]

def no destory actor involved...not that i can see anywhere.
unless gravity kills or destorys actors?

[u/[deleted] → u/TheVisualCast]

I'm not sure of any other way for Pending Kill to be triggered. According to Unreal Engine documentation it refers to an object that is already "garbage" but still exists somewhere. That was a copy and paste from their docs.

You could try changing the lifespan to 0.5 and see what happens.

[u/TheProvocator]

Physics go to sleep when idle for some time, I'm sure it can be disabled, but probably not recommended for performance reasons.

Should be methods for waking them up.

[u/TheVisualCast → u/TheProvocator]

ok this solved it. i added a wake all rigid bodies in the loop, and its ok now.

[u/DifferenceGene]

Do you ever set that object as a variable? Pending Kill errors usually pop up when you set something as a variable and then, later in your code, try to destroy it. That causes an error because the variable is now referencing something that is not in the game anymore. You have to make sure you are not setting the "object that will be killed" as a variable anywhere in your code.

Edit: reading back over your post, you are putting all the objects in an array. If that object is in an array when you try to destroy it, that's going to cause an error. You need to remove the object from the array before destroying it. You can't have any existing references to an object (in a variable or in an array) when you destroy it because now your code is referencing something that is not in the game. Make sense?

[u/TheVisualCast → u/DifferenceGene]

im not destorying anything...

im just driving a constraint, but its not driving it for all of the actors, and the error is making me assume its because of that error, it may not be tbh..

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[u/CloudShannen]

Use a IsValid or Validated Get before using any Reference / Pointer to confirm it still exist and isn't Pending Kill etc

[u/TLable]

Can you create a class that is pending death and a state machine that when a actor is in that class, use a state machine to set what it cannot do in that state and do what needs to happen then pass it from that class to a dead actor.