UE5 Enhanced Input C++ Setup! | Unreal Engine 5 Tutorial

Have you ever wondered how to implement Enhanced Input in a project with C++ and Blueprints? Wonder no longer! In this episode, I go over setting up Input Mapping Context objects, customizing InputActions, and pairing bindings made in the code with characters made in Blueprints.
Enhanced Input is a new form of input developed for Unreal Engine 5.1 and higher. This new input system can handle some of the more complicated mechanics with input actions and input axes, such as charged inputs, held versus tap inputs, as well as deadzones and response curves. It is not required to implement Enhanced Input as of the current time over standard Action Mappings and Axis Mappings.
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[@Fightarcade]

I tried on FighterTemplate in UE5.2, but it worked👍✨!

[@Shawnthebro]

Excellent news! Thank you for letting me know!

[@apalladium5k]

Good work, Thanks for the walkthrough!

[@Shawnthebro]

Thank you very much! I’m glad you enjoyed.

[@julianaskuratovsky8701]

thank you very much!! wonderful tutorial!!

[@Shawnthebro]

It is my pleasure! I’m so glad you enjoyed!

[@torarinvik4920]

Awesome. One tip use forward declaration in the header and include in the cpp file. This speeds up compilation times afaik.

[@Shawnthebro]

Thank you very much! That is a great tip, and I believe you are correct. I don’t do it often, but I will do my best to use forward declarations in the future!

[@jekku9]

I needed to also add #include "InputMappingContext.h" in the header file to get it to compile

[@Shawnthebro]

Thank you for the tip! The next few Unreal Engine versions (5.0-5.3) had minor changes to things like this. This is goo to know for people who may run into this issue.

[@RonGameDev]

When you cast to the Enhanced input component, could I also just change the function? Instead of "...::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)" could I do something like "...::SetupPlayerInputComponent(class UEnhancedInputComponent* PlayerInputComponent)"?

[@Shawnthebro]

That is a good call. You absolutely can do that (Unreal changes the code to use this method after 5.2). You may need to change the source code as well if you do this, since SetupPlayerInputComponent comes from the Character class (parent of our base character).

[@S.Gamedev-zc2wp]

I wait for next tutorial

[@Shawnthebro]

Thank you very much! I hope you enjoy it when you see it!

[@deanmiller541]

What's the purpose of the Input Mapping Context field in your pawn? It seems like it isn't referred to in your C++ code.

[@Shawnthebro]

Yes! You are correct. I had actually set it in the Blueprint in the previous Enhanced Input episode. I should have shown the line of code in this one, but I forgot. The point of the context is to assign the mappings and allow the system to capture them when the player inputs them. Here is the line you should use to do it in C++ code: APlayerController* controller = Cast(GetController()); UEnhancedInputLocalPlayerSubsystem* Subsystem = ULocalPlayer::GetSubsystem(controller->GetLocalPlayer()); Subsystem->AddMappingContext(inputMappingContext, 0);.

[@punchline1729]

👌 👌

[@Shawnthebro]

Thank you so much! I’m glad you enjoyed.

[@lubospejchal498]

How to bind movement action to character by c++ code (Character.cpp)? I mean without blueprint of character.

[@Shawnthebro]

This is a good question! There is some combination of the C++ and Blueprints in this episode. You can do it without Blueprints by creating these EnhancedInputAction classes (inputToJump and inputToMove classes) and assign them to the pointers in the character. That will eliminate the need to set them in the Blueprint.

[@jrkienle]

@@Shawnthebro Is there any chance you can elaborate on this a bit more? I'm trying to move over from the web dev to game dev industry and trying to stick to C++ instead of blueprint wherever possible to have better git difs. If you have any links to docs on assigning those C++ pointers in Unreal Engine I'd love to see them!

[@Shawnthebro]

Absolutely! C++ knowledge is very helpful. You’d like to assign the pointers in C++ for the mappings instead of the CharacterBP, is that correct?

[@noname_2108]

hey there, thanks for the tutorial! BUT, for some reason when a create a blueprint based on the c++ class of a character and assign there an Action it is nullptr in the game and my mapping context doesn't work. Can you tell why?face-red-droopy-eyes

[@Shawnthebro]

Hello! I’m glad you enjoyed. The Mapping Context needs to be assigned in the code or Blueprint. Do you know if this was done? If not, I will gladly share what you need.

[@noname_2108]

@@Shawnthebro yes, firstly I didn’t add context for a enhanced input subsystem and for some reason when I switched the game mode to default action stopped being nullptr

[@noname_2108]

@@Shawnthebro so that’s it, no it’s all good

[@Shawnthebro]

Good catch! Nice working finding it.

[@Shawnthebro]

Very good news!

[@S.Gamedev-zc2wp]

i love you

[@Shawnthebro]

I am very happy about your kind words. Thank you so much!

[@unrealengine5-storm713]

InputComponent is always null for clients and idk wtf to do

[@Shawnthebro]

Are you handling the InputComponent in the Character class (like in this video) or in a PlayerController class?

[@unrealengine5-storm713]

@@Shawnthebro The player controller. I imagine this is where my issue arises but I don't understand how or why this matters. :(

[@Shawnthebro]

In my opinion, the PlayerController is the better place to do it (it at least makes more sense). I think it might be causing an issue because there isn’t a proper PlayerController assigned to the client, or they aren’t set up to use your custom PlayerController. Do you know if that is the case?

[@Vundeq]

cannot open source file "InputAction.h" :(

[@Shawnthebro]

Sometimes there are IntelliSense errors when adding new includes. Have you tried building? If so, does the Output Log give any additional information on the error?

[@brainfox8393]

@@Shawnthebro D:\UnrealProjects\BirdFly\Source\FlappyBird\Public\Bird.h(5): fatal error C1083: Cannot open include file: 'InputAction.h': No such file or directory i also have this problem

[@Shawnthebro]

Are you in UE5.0 or UE5.1 and higher?

[@brainfox8393]

@@Shawnthebro 5.2,I have solved this problem through adding EnhancedInput Module ,it seems that it must add module before add include

[@Shawnthebro]

Good find! I'll make a note for 5.2 (and probably higher).

[@halfbakedproductions7887]

My favourite part about Unreal is how it doesn't play nice with Visual Studio and won't compile code that's correct, because it whines like a bitch about not being able to find header files. Rebuild and clean your project between 17 and 44 times while wearing a blonde wig and it might work. You won't know why it now works, but you shouldn't question or jinx it.

[@Shawnthebro]

Make sure the editor is closed when building Visual Studio if it is giving you trouble. Sometimes both programs try to access the same file at the same time, which isn't possible.

[@GoldnTouch448]

can you make a fighting game tutorial for ue5

[@Shawnthebro]

Yes! The current Fighting Game Tutorial series will be converted to UE5 after a few issues with rollback netcode in UE5 are resolved.

[@GoldnTouch448]

@@Shawnthebro thank you I've been struggling for awhile

[@Shawnthebro]

No worries, my friend!