Unreal Gameplay Ability System - #3 Gameplay Effects

Unreal' s gameplay ability System, better known as GAS, is a fantastic system to create actions for your game characters. almost any real-time Combat system could benefit from using it. It's just sad that there isn't much documentation from Epic games to make this easy to learn. Which is why I will try it myself, to take you through all this step by step and learning how you can set up this plugin to work for your game!
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[@mademax1]

Good speed, understood everything, didn't fry my brain. Thank you!

[@NuttachaiTipprasert]

I believe the Invalid modifier op is just an enum guard which you don't suppose to use. It's a common C++ coding practice to put an invalid enum value as some kind of data validation. It means, there's something wrong with your data if you are using this value.

[@bibCorp]

I've been working with GAS for a while now but I always have to return to some kind of tutorial when doing the first steup steps. I loved your first videos so I kept watching your playlist. You are doing a great job explaining all the steps and all the confusing things. People will have to return to this video several times because some UX parts of GAS are extremely poorly designed, but your video is a very good video to return to.

[@thegamedevcave]

yeah GAS is a headache and a half, it's very designers friendly with how tags are so important but for a programmer it's a nightmare, there is nothing connecting 1 thing to another and troubleshooting things can be a pain because it's all tag based instead of using some sort of object reference based code... But once you get used to it, i find it still is great to work with :D

[@Sworn973]

06:31 Add is just a subtract with negative number 👌

[@thegamedevcave]

i mean, you're not wrong XD

[@gmcv260]

So if you had an armor stat that I wanted to use to reduce incoming damage by a certain percent. Would I used the attribute based calculation to achieve that?

[@thegamedevcave]

you would have a defense stat on your attribute set and when equipping armor use a gameplay effect to add to that stat, and when unequipping use a gameplay effect to remove it again. I have a video coming up pretty soon that shows off how to "set by caller" on a gameplay effect, that way you can re-use the same gameplay effect to add/remove different values from an attribute, that's how you would use that. You probably have a data asset or something for the armor, with a def stat on it, you pull that info from your data asset, use it to set by caller on the gameplay effect. Or, if that sounds like a headache (which at first it did to me) , if you only have a small amount of armor, you can always just make a bunch of individual gameplay effects , 2 for each piece of armor : 1 to add the def points, and one to remove them.

[@Cereal_ttk]

So if I wanted to add a temporary shield(kinda like an extra health bar) to someone or give them an armor stat would I have to do that in c++? Or can that be accomplished even after all the intial setup only using ue5?

[@thegamedevcave]

the gameplay ability system plugin does require some setup in c++ , like setting up attributes ( such as HP, MP, stamina, whatever your game needs) and it's best to also set up your character classes themselves through c++ so you can add the Ability system component there. Then after that almost everything is done through blueprint and very design friendly. Only some more advanced calculations (liek dalulating a gameplay effect with multiple inputs or multiple outputs) are still c++ only

[@IJH-Music]

Does Unreal Engine run as smooth as Unity? Or does it require more resources? ( RAM, CPU, GPU..)

[@chordalharmony]

It’s a bit of a RAM eater, especially if after a longer session

[@thegamedevcave]

it mostly requires a good amount more Vram, in general the engine is heavier on your PC than unity. That said, the actual games produced by it dont tend to have much more overheard and preform on the same level or better usually.

[@AnkitRawat-iv1rl]

How do we stop a gameplay attribute reaching a negative number for example i only want to apply the game play effect until health reaches zero i dont want it to become negative number

[@thegamedevcave]

look through the rest of the playlist for the videos on either : set by caller, magnitude modifier calculation or execution calculation. all those offer possible solutions for this

[@bloydi]

Hello, I don't have tags section in Gameplay Effect can u help me?

[@thegamedevcave]

there's no way that it's actually missing, my guess is you're looking at the wrong place. make sure you look in the class defaults, not the class settings.

[@bloydi]

@@thegamedevcave what's ue version u use?

[@thegamedevcave]

@@bloydi unreal 5.1 but it shouldn't make a difference

[@dmnpoe]

@bloydi They can be added In Components Array (like Modifiers and executions). Not all tags, some tag categories removed or redesigned in 5.3

[@angeltrujillo426]

Hello Good tutorial, where I can get the characters, greetings.

[@thegamedevcave]

Characters are part of the paragon collection on the unreal marketplace, free to download and provided by epic games!

[@srikhard9621]

Can you provide me dicord link

[@thegamedevcave]

in the description :)