Introduction to Subsystems | Unreal Engine 5

Subsystems are an incredibly convenient way to organize code and use it anywhere you need it across C++ and blueprints. It's also perfect for developing plugins as it makes the user experience simpler than using manager actors.
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[@palto567]

Subsystems are a great way to compartmentalize state and behavior. Our project uses a custom world subsystem to handle dedicated server communications with our backend services, as well as a custom game instance subsystem to handle API authentication calls and user session for client builds. This way the GameMode, GameInstance classes do not explode in size.

[@Andrew-wh7uy]

Thanks for sharing with your experience! We'll try that too

[@rishikhanna1489]

Great explanation, Thank you!

[@MrBontA-cs1ue]

I appreciate this tutorial, thank you kind sir

[@deivid-01]

Great Introduction! Goes straight to the point, thanks Elliot!

[@FredericoZveiter]

Thanks for the video! Very good!
One thing I'm scratching my head about is how to access assets or having settings on my subsystem?
If it was an actor I could easily add a few UPROPERTYs and set them on the details panel.

[@elliotdematteis]

Great question, my recommendation would be to use UDeveloperSettings. Tom Looman has a great blog post about implementing this: www.tomlooman.com/unreal-engine-developer-settings/
I need to set this up for my game so maybe it's a good video to make. Since I don't know your full context, if that doesn't work for your use-case let me know maybe there is a better solution.

[@onestepsolutions]

hi, thank you for your video, really nice explanation,
I have an issue try to get the "StaticMeshEditorSubsystem" (to be able use MergeStaticMeshActor) in dataprep. but is not available how can I initialise "editor sub system " ?

[@isembart_]

Great video

[@elliotdematteis]

Thanks! Let me know if there's any other similar content you think could use a video!

[@marcusrivers5669]

Why does my build fail when using subsystems? Should I be registering the subsystem somewhere and adding it as a module in build.cs. Im c++ only. Thanks

[@elliotdematteis]

What kind of error are you getting when you build?

[@NotSyril]

Are these essentially just singletons that are attached to the lifetime of whatever they are inheriting from (World, Player, etc.)?

[@elliotdematteis]

It depends what it's attached to but it definitely can be. A world subsystem is essentially a Singleton but if you have multiple local players then the local player subsystem wouldn't be.

[@NotSyril]

super interesting! @@elliotdematteis

[@jjjjjjjjjjjjjjjjjjj804]

Do more on the subsystems, in depth subsystems tutorials is a bit of a gap on youtube.