NPC 컨트롤러에서 청각 인식 구현하기

### 언리얼 엔진에서 NPC 동작을 위한 청각 인식 구현하기
* 🔊 새 C++ 파일을 생성하여 **플레이어에 소음을 발생시키고 인식 시스템에 보고하는 코드**를 추가합니다.
* 🏷 헤더 파일에서 사운드 자극에 사용할 **새 태그 문자열**을 정의합니다.
* 🎮 플레이어가 소음을 내면 소리를 재생하고 인식 시스템에 이벤트를 보고하는 **'OnDistract'라는 함수**를 구현합니다.
* 🎚 프로퍼티를 노출하여 **편집기에서 재생할 사운드**를 설정합니다.
* 🧠 인식 이벤트를 처리하도록 AI 컨트롤러를 수정하고, **인식된 노이즈를 저장하기 위해 프라이빗 액터 배열**을 추가합니다.
* 🔍 인식 시스템의 `온업데이트` 기능에서 인식된 액터를 반복하여 **소리 자극 태그**를 확인합니다.
* 🧠 소리 자극이 감지되면 **자극의 위치로 칠판을 업데이트**하고 자극이 성공적으로 감지되었는지 여부에 따라 플래그를 설정합니다.
* 🌳 NPC가 소리 자극을 조사하면 **조사를 중지하도록 새로운 행동 트리 작업**을 구현합니다.

NPC의 행동은 소리를 재생하고 인식 시스템에 보고하여 플레이어 소음에 반응하도록 수정됩니다.

it's time to do some hearing perception. The idea is to add code to the player to make a noise and to report that to the perception system. Looks are then out here in perception study to the NPC controller and modify the behavior tree to suit. We need a new file cuz I need a tag string. I could put it in blackboard keys off not going to cuz it's not a blackboard key so we had a new ID son want a header file go get this location right. I'm gonna call it ion tags. Actually, namespace tags header includes so we go to the plaque. It's a header so we need a function in here which is called when the player makes a noise. It's gonna have a button on the gamepad and key on a keyboard and possibly a mouse button which player noise and report to the perception system. I call it on distract. I'll implement this. I go to here. I got do a bind action we shall have tried later in unreal. I call it distract and went to go to on distract. Oh yes, we need a sound to play.

and for that, we're going to expose you property that would be somebody set it in the editor so that's that. Yeah, I need a header for this but some of it my first for you sound nice stretch sound think I'll make the category sound not animation and are expected to complain about of it's not popping would normally need everything could are any other headers but that header is normally where you sound basis. Oh, it actually is need some heading closer we don't have so duplicate this one make it hearing need a tax hey sigh. Oh, it sags and some morning when you gang place tank so you don't think we've got. I think we need engine as well god you do this function if we've got but to stretch sound okay from ekta location. So, Inge you gain high stakes we play the sound by sound location need the world the sound play the location then we need to report this event to the perception system report noise event and you pass the world again liar character are the maximum range.

which I think if you see always it's no believe me and the tag no he's tagged and now we need the AI controller go ahead. The perception system it's a fact so it can hear what's happened so we need to add something to the private section do you think in fact. [Applause] and we're gonna need a function which is allocated delegate calls and you have to have the you function Mac Romney's also it don't work Boyd on updated likes it's a array of actors pointers to I hacked old doors now and CP hey Hulk implement this first there in the CP got some ahead destroyed I got some extra here just had IR tax office copy that make that human the gameplay steaks now we need to set it up first now I'm gonna make a operation here. I'm gonna put a lot of this inside it and if statement because this create default sub watch it could file so I do yeah so right side config we do this lot I'm also tied in this code up it give it.

it do a multiple assignment like this because it'll set to choice. I couldn't so it's that and we want hearing you Hisense come back here in a little name what set the hearing range set it to say 3 thousand. You say it to like that work of course copy most of this so a bit typing Isis. I don't that change this delicate chase delica is a perception out lazy strangely word term mind if you ask me do the code for the actual function this on update it needs and it got gonna use a cup an ST forums so they get the perception in before of each one of these as we go round around the exception. So what that does sigit specific opponent to get the actor's perception on the actor and puts it in him before me now. I use use a for loop on that. I'm gonna make this guy 16 Malloy. I've got the stimulus that this actor create it so I'm gonna look for this tag. If I found the tag then he's a

human stimulus. If not, it is quite possibly a psych one. So every secret to the noise you get the black ball. Oh, should be a comparison operation of Simon. So get a blackboard. Yes. Ah, yes. If we don't have this, we need to add a blackboard key to that. I'll do that in a minute. This accessory, since I need to write the location that's without the stimulus location machine. The effect would be the player cause the reason why we've got this if statement there. Now its clause is because when he goes to investigate the sound. When he gets there, he could find the ply on which case this will happen this branch here and it will set can see by work depending whether it the stimulus was successfully sensed. So blackboard keys, we need a new string is investigating. Stop complaining now. No any new tasks. No behavior tree task called stop investigating which switches off this is investigating. Okay. So I'm going to use my new method. Okay. Got a fix of includes the controller for the NPC blackboard.

component and a black keys file give thee no to name such as in here execute task and we just use that to access the blackboard such it get it. That's really it so now we need to go. Well, well guess we would build that usually and I'll see you in unreal engine building successful do that input binding first before forget. I wonder what doesn't work. I'll make a new action mapping call it distract heads three of them first month we need gamepad. Hey um bye keep on set seed inside and then the mouse now to go for right mouse button left mouse button attack. So what we need is a new sequence node side track one off. I call it just investigating believe. Now this doesn't work do it anyways is what was done in the blueprint version and he used but tight to face BB entry to make the character face the source Allah noise the BB entries target location ie waiting once. I'm gonna give it one second lot then I move to isn't it to target location then another wait make that one second then this some stop.

investigating. That's the first bit we need to decorate on this, which will be not target location but ah yes. Go ahead don't in C++ Paco. I don't know key called he's investigating tray spacing also that set. There's a number of issues with this. First one is a bug to be that sort. Partly works. It's let it go oh yeah. Got said sound every upslope make it collapse one like an explosion actually that off for a minute. See it actually but what happens as he freezes. And a bit of investigation showed that is this. This some note here this rotate to face BB entry conflicts with the NPC's. But it's in the MPC. Yeah in the character movement. Many moons ago we changed the character movement rotation settings to orient rotation to move. And that seems to conflict with that node. Now you can either switch it to the other one which is used controller desired rotation. You got one of them on because otherwise he it doesn't pro Tate when it moves. These pucks weird. My solution is to just

delete this notes and I really see the point anyway it's gonna move to the player is right so first of all he's walking. I would like him to run towards us. The other thing is that when it gets to us and Caesar she doesn't immediately attack just wait for the sub-tree to stop and then does attacking. So we go back to the tree first thing it affects us of speed so I'm gonna put that service on the pedro' change speed. I like it kick it him not make it yeah make it six under. Oh the thing is this one myself five hundred that's madness one 502 then so may not 500 so she should combine you know if I'm gonna do this noise yeah next so to fix this thing about no immediate aking what we do is oh I need to make this yeah I've gotta set the observer box on that decorate both. I got another decorate had another decorator which they can't see set it to kandacy liar and make it a thought now what'll happen.

is if he when he gets to location if he can see the plier. This is investigating night will be a ball winning. It will come back and go down to here and start attacking and chasing stuff, which is what we want. If I can rearrange these no too big, so get a bit out and let you see the tree. Me thinks it will work now, cept it stopped working. Why was that? There was a reason, but yeah, well I managed to my brokenness now. No, it should be is not set, I believe. Yeah, there comes over and then he immediately attacks because now can see pie is setting a ball up sub tree. Yeah, I got just got a logic wrong way around. I can lose him can be a bit difficult. He's gone back now. If I make us make a sound, what happened so they NPC maybe is you've gone back to patrolling. What happens to be sees us again, yep. So I think it's working, that's it as basics of hearing perception.

UE4 C++ AI Series - Part 10 Hearing Perception

MrCxx

NPC 컨트롤러에 노이즈 인식 추가하기

인식 시스템용 태그 문자열을 생성하려면 새 파일이 필요합니다.

이 코드에는 플레이어가 소음을 내면 소리를 재생하고 인식 시스템에 이벤트를 보고하는 함수가 포함되어야 합니다.

이 함수에는 소리와 위치, 그리고 소음을 내는 월드와 캐릭터에 필요한 헤더도 포함되어야 합니다.

배우의 인식을 위한 AI 컨트롤러 기능 수정하기

AI 컨트롤러에는 할당된 델리게이트 호출과 인식 시스템에 대한 좋아요를 업데이트하는 함수가 있어야 합니다.

코드에는 청각 범위 설정, 인식 업데이트 기능 구현, 자극을 반복하는 for 루프 사용 등이 포함되어야 합니다.

이 함수는 배우의 인식과 생성된 자극을 기반으로 특정 상대를 식별하도록 설계되었습니다.

언리얼 엔진에서 자극 위치용 블랙보드 키 생성하기

NPC의 행동에 대한 자극 위치를 추적하려면 새로운 칠판 키가 필요합니다.

이 키를 사용하면 캐릭터가 NPC 칠판 컴포넌트의 컨트롤러를 사용하는 새로운 방법으로 자극의 출처를 조사할 수 있습니다.

이 기능이 언리얼 엔진에서 올바르게 작동하려면 게임패드와 마우스 버튼을 포함한 동작 매핑에 대한 입력 바인딩도 필요합니다.

C++에서 NPC 동작과 캐릭터 움직임 조사하기

NPC 동작으로 인해 회전 및 이동에 문제가 발생하여 게임에서 멈춤 및 붕괴가 발생할 수 있습니다.

캐릭터 이동 회전 설정에서 충돌이 발생하는 것으로 보이며, '컨트롤러 원하는 회전 사용' 옵션으로 전환하는 것이 해결 방법일 수 있습니다.

또한 공격 동작에 관찰자 상자와 데코레이터를 설정하여 NPC의 속도와 공격 동작을 조정할 필요가 있습니다.

게임 내 NPC 행동 문제 해결하기

화자가 플레이어를 볼 때 더 잘 반응하도록 NPC의 행동을 조정하려고 합니다.

NPC의 행동을 실험하고 효과적으로 작동하도록 노력하고 있습니다.

화자는 NPC의 청각 인식에 대한 기본 사항도 고려하고 있습니다.