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Is "generate overlap events" expensive?

Hello! For my top-down game I am trying to create a system so that when the character goes inside a room, whatever is between the pawn and the camera becomes opaque. The way I am having this happen is by creating a component that contains the function to make it opaque, and having a collision volume between the player and the camera. So when the player overlaps the scene component, it'll make it invisible.

This means that in order for it to work, I have to enable "generate overlap events" on every actor that I want to become invisible, which leads to my question: Is "generate overlap events" expensive to have ticked on many actors? Or is it not that big of a deal?

Thank you!

Product Version: UE 4.12
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asked Jul 22 '16 at 07:59 PM in Blueprint Scripting

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jfaztk
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Hi there, i guess this is pretty relative compared to your alternatives.

I would suggest to take an actor, configure it and duplicate a decent amount of them in your level. (just a few alt+drag when selecting a whole duplicated bunch over again). If your profiler doesn't burn, i guess you should be good :)

This is what i did with the Menger-Sponge fractal: Over 6000 actors, all of them with overlap events, and ingame there are about 20 pawns speeding around on the surface where every pawn overlaps with about 4 of them. No issue at all.

alt text

hth :) Marooney

mengerspongemap.jpg (180.3 kB)
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answered Jul 23 '16 at 05:13 PM

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Marooney
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avatar image Marooney Jul 23 '16 at 05:22 PM

Btw. the limit was just duplication freezing and crashes in editor.

avatar image jfaztk Jul 24 '16 at 02:08 AM

Thank you! This answers my question pretty well.

avatar image MJBrune Sep 03 '17 at 11:57 PM

Very nice. Good work dude. This data helps me as well!

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