What is a Blueprint Function Library? This is why you should use them | Unreal Engine 5 Tutorial

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In this video we take a look at what a Blueprint Function Library is, how we can use them to our advantage, and why you should be using them in your projects from day one.
Blueprint Function Libraries allow you to re-use your handy functions throughout your entire project. No more need to write specific functions on a per-class basis.
Works for Unreal Engine 5 and Unreal Engine 4.
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#unrealengine #BlueprintFunctionLibrary #tutorial #Functions
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[@Kekdot]

Hey guys, 👨‍🏫 My Patreon link: www.patreon.com/kekdot Download Project Files | Premium Tutorials | Courses 💦 Get our Game on Steam | Kekdot Center: store.steampowered.com/app/1487180/Kekdot_Center/

[@moosehead13]

1:12 I like how you just casually tossing in information that blows my mind. I've been wondering how to have functions that allow delays inside them and never knew about macros. Thanks for taking the time to share your knowledge!

[@KekonomTV]

Many thanks. Working with UE for 6 years, never knew about this :D

[@tomaslaaperi5849]

lol. excactly what was next on my "to learn" list xD ty!

[@user-ys8nc4nr7k]

這真是太棒的教學了，謝謝你

[@WanliLoo]

Great work!

[@aksoyarda]

Great video, I hope your multiplayer steam game will be available soon!

[@Kekdot]

Available very soon! Video coming this month about it! And then every single week

[@chuichui8162]

ThankYou!

[@Julianoz224]

Amazing Tutorial! I have a question, I've been told and seen online that Function Libraries can be costly due to construction for each function every time they are called. Do you know if this is true and if it is even worth worrying about if so?

[@Kekdot]

Hi there, They are slightly more costly that’s true due to the origin of their creation. They do indeed essentially just ‘spawn’ into existence each time they’re called. Instead of being attached to a class that is already in existence. But the cost is completely negligible. Factually they cost more to call, but this is almost unmeasurable. What I do recommend however is using them for general type logic. So don’t run specific character logic on them for example that you run on tick. If you’re going to do that I recommend installing the functions in the class where you intend to use them. Use function libraries for more general functions that you don’t call an absurd amount of times. So good examples would be functions such as ‘create loading screen’, ‘create pop up’, ‘Load save game data’, etc etc. Put general reusable logic in here that you at max would call once per second.

[@Julianoz224]

@@Kekdot Thank you very much for the detailed response! Your channel has been such a great help :)

[@felixg2062]

So those are like global functions?