Smart Enemy AI | (Part 3: Perception) | Tutorial in Unreal Engine 5 (UE5)

[@brianpearson8552]

This is actually some of the best Unreal engine content on ANY complex subject I have ever found on youtube. This series is amazing completely blowing any course I've ever taken on A.I. out of the water and is one of the most indepth tutorials of Unreal Engine A.I. out there. Wonderful job mate, please don't ever stop!

[@AliElZoheiry]

Thank you so much for your kind words! I'm thrilled to hear that you find the content helpful and valuable. I truly appreciate your support and encouragement!

[@omegablast2002]

@@AliElZoheiry I absolutely agree with that guy, i've been using unreal for almost 6 years now, your tutorials are spectacular. on par with Mathew Wadstein, Thank you for being so concise, and yet still getting right to the point with every topic and subtopic. know that even advanced UE users are appreciating what you are doing here.

[@adriantome278]

Amazing tutorials, are so helpful. I have a few recomendations: 1. You could use a function to Get the Stimulus Class and its easier to handle the logic. 2. To change the debug input go to Project Settings - Engine - Gameplay Debugger 3. To re-enable the Print String functions write "EnableAllScreenMessages" on the console command at the bottom of rhe editor Thanks for the tutorials, keep going 😁

[@AliElZoheiry]

Hey Adrian, Glad you found this helpful 🙏 and thank you so much for the tips, I'll be sure to keep them in mind.

[@electronicinfection]

Thanks!

[@saigerakoski9912]

hero

[@Zero-Skillz]

Paid tutorial "Set Sphere Collider. Make it big. Aggro anything that enters it" KZbin tutorial remakes AI from The Division 2 and does it in a way even my oonga boonga brain can digest. Well done and you have my thanks and admiration.

[@AliElZoheiry]

You're very welcome! I'm glad you found it helpful. Thank you for your kind words and support! 🙏

[@FolkvangStudios]

Took me a few times to re-read to understand what you meant. It's very true. I've spent thousands on courses and very few really went into the perception systems as detailed as this.

[@JayTheDevGuy]

Insanely helpful tutorial. I especially appreciate how much you showed off the AI debugging tools. I can't thank you enough for all the work this series must have taken to put together.

[@AliElZoheiry]

Thank you Jay, I'm very happy you're finding this useful. I definitely put a lot of effort into each video, I appreciate that you see that 🙏

[@Shizuma450]

Without exaggerating, this youtube channel is frustrating... To see such a high quality of video on such a complicated subject (at least for me, the subject of AI is something that's not usually dealt with in such depth on KZbin or even on the training courses I've taken on Udemy) is simply amazing. (When I compare this tutorial with the majority of paid training courses... I'm completely impressed) Thank you, you really help me to understand this subject much better, I had lost hope of finding a tutorial of such quality!

[@AliElZoheiry]

You are very kind Eurg, thank you so much for the support. I do put a lot of effort into making these videos without much expectations in return, so it really motivates me to see comments like this and to see that it's helping people. I hope you enjoy the rest :)

[@coryclark2894]

I never leave comments. Ever. You get one - Keep it up my friend, your teaching style and tutorials are the best I've experienced. The speed, the topics, the explanations, and your clear preparedness to understand what you are doing is all spot on. I'm hungry for more and will be sad when I complete your available content. You are going places if the rest is this quality. Thanks for the help

[@AliElZoheiry]

Thank you so much for taking the time to leave this comment! I'm truly grateful for your kind words and am thrilled to hear that you're finding my tutorials helpful. Your support means a lot, and I'll definitely keep creating more content for you!

[@LeateqOfficial]

just finished this one !! THis is amazing i was able to add noises do different things in the game, for a example if you pick up something and it's loud and the enemy is in the other room, he can hear you and comes to the room to investigate !! This is so cool, out of all tutorials i've seen in the last 2 years on unreal, your way of explaining and showing this is the best

[@AliElZoheiry]

Hey! I'm really glad to hear that you found it helpful and that you're able to implement those features in your game 🙏 Thank you for your kind words, it means a lot to me! Keep up the great work! 😊

[@Itwasabadthing]

I was recommended this by someone else in the unreal engine masterclass (unreal Sensei) and dear god this is great. great tutorials, well explained, looking forward to more

[@AliElZoheiry]

Wow, thank you so much, very glad you liked it 🙏 Was it KZbin that recommended my videos, or an actual person 😅?

[@Itwasabadthing]

@@AliElZoheiryan actual person, your yt channel actually when I was looking for it after it did not really show up, which is yt overshadowing the best tutorials with the more crummy ones

[@CROXoDyLE]

Hey man just wanted to say a huge thank you! I have done a fair amount of game dev in the past, but I finally gained the courage to give unreal a try. I truly stumbled across the best series as a first time unreal dev. I have also given your debugging video a watch and has helped me so much!

[@AliElZoheiry]

Hey! I'm really glad to hear that my series has been helpful for you. Thank you for the kind words, and I'm happy you're diving into Unreal Engine! If you have any questions along the way, feel free to ask 🙏

[@callumcrothall2858]

Perfect amount if information and delivery style, I love how you show us the mechanics and how it works and leave the actual gameplay implementation for us to experiment and play around with, almost like a template to help us get started and inspired! Want to thank you so much for your work, actually the best educator I have come across!

[@AliElZoheiry]

Thank you so much for your kind words! I'm really glad to hear that my approach is resonating with you. I appreciate your support and I'm happy to help you get started! 🙏

[@wolfdezziignacg2592]

You're awesome! Thanks! Unlike Code Like Me, learning from you, I feel like I'm not just repeating, but I understand what I'm doing. No semi-knowledge, no ignorance. It's just a miracle!

[@AliElZoheiry]

Thank you so much for your kind words! I'm really glad to hear you're finding the tutorials helpful and that you're gaining a solid understanding 🙏

[@oscblade1691]

First of all thank you Ali for these tutorials honestly I have watched a lot of different KZbinrs and their tutorials and yours is the best. Also for anyone running into the same issue I was having with the damage perception not showing in the debugger. First make sure you have a value for the damage amount. Second I had two ai in my level and I believe it did not know which one I was trying to damage and so nothing registered. Once I deleted one of them from the level it worked. Probably need a tag or id for each enemy or overlap event to let it know which is being damaged.

[@AliElZoheiry]

Thank you so much for your kind words! I'm glad you found the tutorials helpful. Also, thanks for sharing the tips on resolving the damage perception issue! 🙏

[@oscblade1691]

@@AliElZoheiry np

[@buga125]

One of the best tutorials I've seen in UE5, even with my custom enemy with custom animation bps and player character I'm able to do everything correctly. Love this series! Also "If the opponent is.. dead for example they shouldn't attack me" cracked me up a little:)

[@AliElZoheiry]

Thank you! I'm happy to hear that you found the tutorial helpful and that it worked with your customized setup. Glad you enjoyed the series, there are definitely some funny moments in there that weren't scripted 😂

[@DanielSouza-zp9gg]

The BEST tutorial of AI that I ever saw in youtube! Thank you so much and keep up bring these amazing tips!

[@AliElZoheiry]

Hey Daniel, thanks so much for your comment, I really appreciate you 😊 🙏

[@SwingPoynt]

Props for teaching people about the debugger!

[@AliElZoheiry]

Thank you! I'm glad you found it helpful. Debugging is such an important skill to have 🙏

[@HunterFloris]

4:26 For people having issues with their apostrophe key not showing up debug AI menu, it turns out that you have to change your keyboard settings on your computer's operating system. The keyboard on your OS needs to be set at US Standard. Anything else and Unreal most likely won't register it. Hope it helps.

[@emmanuel.tavares]

And how to remap the keys of categories? There is no numpad here.

[@allthefame37]

@@emmanuel.tavares If you're stil stuck on this, you'll have to go to Project Settings > Engine > Gameplay Debugger > Input and all those characters are there if you need to change them

[@WhatIsMyPorpoise]

thank you, not everyone one uses the same keyboards

[@WhatIsMyPorpoise]

@@emmanuel.tavares to change keybindings, you need to look into project settings, under gameplay debugging.

[@GameArchon215]

@@emmanuel.tavares Go to Project Settings > Gameplay Debugger, and all the binding options are there.

[@crisppxls]

As well as being a fantastic guide to the AI system in Unreal, These tutorials are an absolute goldmine of tips, techniques and best practices. Really useful stuff man. Can't thank you enough!

[@AliElZoheiry]

Thank you so much for your kind words! I'm thrilled to hear that you find the tutorials helpful. Your support means a lot to me 🙏

[@luisbarbosa-deathmaskrox9842]

How is it possible such a great way to explain so complex things? You are the best man!! Can't explain how easy you make things be transparent and obvious for us!

[@AliElZoheiry]

Thank you so much for your kind words! I'm really glad to hear that my explanations are helpful. I appreciate your support 🙏

[@sajjadmirshabi]

OMG Ali your Tutorials are amazing, the codes you make in blueprint are very understandable and optimized. Good luck mate. I hope you reach 1K very soon to monetize your channel. You really deserve it. Can't wait for the next part I learn horrible EQS in such easy way 😍😍

[@AliElZoheiry]

Thank you so much Sajjad. Really happy to see that my hard work is helping you and I will continue to do my best

[@inkgs]

One of the best channels about UE Thank you, Ali!

[@AliElZoheiry]

You're very welcome! Thank you for watching, I really appreciate the support 🙏

[@rashidfarhan6223]

in any type of game development. AI designing and development is absolutely an essential knowledge to have for developers. can't thank you enough for these videos with just 3 videos and I've never felt this confident in Unreal it's surely UNREAL if you will hahaha

[@AliElZoheiry]

Thanks for your comment! I'm really glad to hear you're feeling more confident in Unreal. AI is indeed crucial in game development. I appreciate your support and hope you enjoy the upcoming videos! 🙏

[@DarkDreamCreations]

i don't understand why dude has 7k subs other channels can't do half of this dude does but they have around 50-80k subs with those funny open/close function BP's amazing man can't believe

[@AliElZoheiry]

Thank you for saying that. I appreciate the support, and hopefully I'll reach those 50-80k subs soon if people see the value of these videos ☺️🙏

[@DarkDreamCreations]

@@AliElZoheiry i believe u will man your content's are amazing keep it up

[@EmpathizeVortex]

this is what i need an in depth series on 1 certain thing not one 10 minute tutorial on how to do a simple behaviour tree then not knowing how to bug fix and solve issues along with expanding the tree

[@AliElZoheiry]

Really glad you liked it. I indeed try to go in depth and actually teach a subject, so that following my tutorials means you can create your own and not just copy and paste my code

[@EmpathizeVortex]

@@AliElZoheiry exactly! I’m not using third person template And I have tried but I cannot figure out how to do Ai animations, the animation blueprint graph has to be set up differently to pawn and I can’t find anywhere how to fix it

[@Akushinjr]

The quality of your tutorials is really incredible, I'm amazed by the level presented in your videos. Honestly, the subject of AI is not an easy one to tackle, and yet you're very pedagogical and really manage to explain things precisely. Thank you very much for this excellent tutorial.

[@AliElZoheiry]

Wow, Thank you so much Shadow for your kind words and support 🙏 I really appreciate it, and I'll make sure to put out more content like this.

[@pterafier]

thank you so much for this series. It's the best on youtube for AI by far

[@AliElZoheiry]

Thank you for your kind words! I'm thrilled to hear that you found the series helpful. Your support means a lot to me 🙏

[@juanarze]

¡Gracias!

[@AliElZoheiry]

Thank you so much for this Juan!! It means a lot to me 🙏🙏 I'm really happy you found the video useful 😊

[@WitcherKING]

Thanks for this great tutorial series! and If someone looking for Gameplay Debugger > it's Under Project Setting > Engine > Gameplay Debugger. Now this (GD link) is on your left Panel. Don't try to search it in all settings search box, you won't see anything even though it comes in listed but nothing in it. wasted an hour searching everywhere. everyone telling the option but no idea the mistake everyone making is "searching the setting as normal instead looking into left panel.

[@AliElZoheiry]

Thank you for sharing that tip! I'm sure it will help others who have the same issue. I appreciate your comment! 🙏

[@polymir9053]

Great series! I do have a suggestion though for anyone following the tutorial. There is already a function which pretty much does what is implemented with "Can Sense Actor". Its called "Get Currently Perceived Actors" and lets you choose a "Sense" to get actors for. This should be much faster than looping through the senses for each actor.

[@AliElZoheiry]

Glad you enjoyed it! And this system does indeed use the function "Get currently perceived actors"

[@commoncure3335]

25:38 how does it know what blackboard you're referencing when you add the get blackboard reference node?

[@AliElZoheiry]

This variable is automatically set by the engine when you call "Run Behavior Tree" in the AIController, the engine then get's the blackboard that is associated to that behavior tree and set's that variable's value.

[@LunarVagabond]

Commenting for the algorithm to kick this higher fantastic work and thank you for it!

[@AliElZoheiry]

Thank you for your support! I really appreciate it 🙏

[@dmitriyberdnikov9696]

This is so complicated and yet you deliver the best lessons that can really teach someone. I've never created an AI before but with your tutorials I can understand the logic behind it and do something on my own. Thank you for such a great work! Also I wanted to ask about AI. So I want to AI to stop chasing/attacking me after I go out of sight radius, what's the best and optimal way to do this? To create another state when the enemy lose player and then create a Selector with condition in Attacking Sequence right before FocusTarget where I check if he's lost the player or not? Or maybe there's better and easier way to do that?

[@AliElZoheiry]

Hey! Thank you for your kind words, I'm really glad to hear that my tutorials are helping you understand AI better 🙏 For your question, I implemented that behavior in part 9 of this series kzbin.info/www/bejne/i2q6mqKkfdKZea8

[@dmitriyberdnikov9696]

@@AliElZoheiry thank you so much!!! I should have seen the other parts first... Anyway thank you. Followed everything!

[@shapphire9915]

I love this series. This is the first behavior tree video I have used and it works. Thankyou!

[@AliElZoheiry]

You're very welcome! I'm glad to hear that it worked for you. Thank you for watching and commenting 🙏

[@SixR6s]

just in case anyone else runs into this, as well, I figured I’d post it here. You can change the keyboard shortcut for the debugger window, it’s in the Project Settings under Engine → Gameplay Debugger (which kinda makes sense when you think about it but is just not where I would’ve intuitively expected it). Changed it there and it works perfectly fine.

[@AliElZoheiry]

Thank you for sharing that tip! It’s definitely helpful for anyone who might be having the same issue 🙏

[@daliendaan]

At 15:30 when he creates the Enum make sure that the Senses are spelled exactly as the Senses are named in the Ai Perception. Otherwise you get a weird Error that after you Damaged him Once he Senses Damage everytime you run into his View or out of its View. I have no clue why this happens but it does... :D I called "Damage"-> "Damaged" in the Enum after changing it the Issue was gone as well.

[@lempereurtetard8170]

All of your tutorial are amazing and your work is incredible. Like in this video, for my game project i just need the sight, and no need for the rest, and it still work perfectly

[@AliElZoheiry]

Thank you so much for your kind words! I'm glad to hear it worked well for your project. If you have any questions or need further assistance, feel free to ask 🙏

[@lempereurtetard8170]

@@AliElZoheiry Thanks a lot ! For the moment i'm working with another of your tutorial ! The one so the AI lost interest in me and go back to patrol

[@forgeoffantasy5157]

Really great tutorial series showing all the basics for behaviour tree based AI in Unreal 👍

[@AliElZoheiry]

Thank you! I'm glad you found the series helpful 🙏

[@retrowrath9374]

I figured out what I was doing wrong, I put AI Perception in my character instead of AIC enemy base, all senses are working now. This solved the issue I was having where the AI didn't have an attack target, thanks Ali. 🤣

[@AliElZoheiry]

Haha, glad to hear you figured it out! That's a common mix-up. Thanks for sharing your solution! 🙏

[@retrowrath9374]

@@AliElZoheiry One question. I have to cast to each different enemy I have in my BTT_Attack from a sequence node for all enemies, is this ok or a more efficient way than using casts? Works perfectly though.

[@AliElZoheiry]

​@@retrowrath9374 the cast operation itself is not expensive, but casting to a class means loading that class in memory if it isn't already loaded, so if BTT attack is always loaded together with your enemies, then it's fine

[@retrowrath9374]

@@AliElZoheiry Thanks.

[@sjrulz14]

Thank you for the tutorials. You are explaining nicely. Easily understandable. Please continue this video series.

[@AliElZoheiry]

Thank you Sj! Really happy you found it useful and I will definitely continue the series, stay tuned ;)

[@alexjohnson1547]

These tutorials are top tier. Thanks, Ali!

[@AliElZoheiry]

You're very welcome! Thank you for the kind words, I appreciate it 🙏

[@majupiju2347]

Perefect! Everything worked very smoothly without bugs ;D And I even managed to implemented the preseption system to work with the previous created abilities from AOE and Projectiles tutorials ;D Which shows me that I'm actually learning something and not bluntly following your steps. This for sure speaks for your teaching methods! Cant wait to continue after dinner :) cheers!

[@AliElZoheiry]

Hey, that's fantastic to hear! I'm thrilled to hear about your successes. It's great to know you're learning and adapting the knowledge. Enjoy your dinner and looking forward to hearing about your progress after! Cheers!

[@xXOAXxTempest]

These keep getting better. Gonna follow the whole series and see where I end up. It would have been nice to have a reset timer on the attacking state once Line of Sight was broken for so long. I assume this can be done threw the behavior tree. gonna play around and find out before the next video!

[@AliElZoheiry]

Thank you for your comment! I'm glad you're finding the series helpful. and that behavior is covered in part 9 of the series ;)

[@misfire8771]

as always such a fantastic tutorial, your channel is the shinning example of UE5 educational content,

[@AliElZoheiry]

Thank you so much for your comment. Your support means a lot to me 🙏

[@WitcherKING]

For anyone getting "PointOfInterest Vector in MoveTO Invalid (Ai Debug) causing Enemy not moving to Sound location. Check 21:00 on the video, you forgot to add the Correct "Stimulus Output on return node" from Array Element.

[@AliElZoheiry]

Thanks for sharing that tip! It will definitely help others who might run into the same issue 🙏

[@olliverkatana4168]

As for me - it's just perfect explanation, thank you, man!

[@AliElZoheiry]

You're very welcome! I'm glad you found the explanation helpful 🙏

[@raduvady]

you are doing an amazing job, your tutorials are extremely good, I've watched a lot on unreal tutorials and yours are my favorite, logical design, great approach, very well explained, even the pronunciation is top notch, hope you will get the appreciation you deserve. thank you 🙏

[@AliElZoheiry]

Thank you so much for saying that Raduvady, I really appreciate you. And I'm happy to hear that you're finding this content useful 🙏

[@solomon._speaks130]

M8 Your acc the goat i swear best tutorials i ever found and always clear and concise. keep doing what you doing legend!

[@AliElZoheiry]

Hey, thank you so much for your kind words! I really appreciate the support and I'm thrilled to hear that you're finding the tutorials helpful. Will definitely continue to create more content for you all! 🙏

[@Зритель-ш6у]

Thank you for the tutorial. You are explaining nicely. Easily understandable.

[@AliElZoheiry]

Thank you for the kind words! I'm glad you found the tutorial helpful and easy to understand. If you have any more questions or need further assistance, feel free to ask!

[@CasualPlay_1]

I'm having a problem where at around 37:00 my Behavior tree goes haywire when I make a noise- constantly switching from BTT_SetMovemementSpeed to Move To really fast, and it stays stuck on that(but not moving) until I walk into it's line of sight.

[@CasualPlay_1]

Nevermind. @WitcherKING saved my me lol

[@AliElZoheiry]

Hey! Glad you fixed the issue 💪

[@andrewtaylor223]

What was the fix here, I am running into the same issue, but it seemed to be working fine before all the changes set to sense hearing.

[@andrewtaylor223]

Nevermind, I found what I was doing wrong. in the "HandleSenseHearing" I missed connecting the the "actor" pin from the input node to the "Set State as Attacking" nodes "Attack Target" pin.

[@Celestia-officiel]

I just have a problem at 36:23, basically the enemy moves well but it detects the player only after the movement (I put the observer aborts to self)

[@AliElZoheiry]

Hey! Detecting the player shouldn't be connected to this part of the behavior tree or any of these tasks. This is handled fully by the AIPerceptionComponent on the AI controller. So try printing some values there to see what the enemy is actually sensing

[@GameArchon215]

4:52 How do you reconfigure the number options in the AI debugger? I couldn't find any option to do that in editor preferences. My number pad doesn't work, so I currently have no way to access the different debugger menus. *Edit:* Nvm, I figured it out. It's actually called the Gameplay Debugger, not the AI debugger. You have to go to Project Settings > Gameplay Debugger, and all the binding options are there.

[@AliElZoheiry]

Hey! I'm glad you figured it out 😊. Yes, the Gameplay Debugger can be a bit tricky to find at first. Thanks for sharing your solution! It might help someone else in the future 🙏.

[@TheDeathbyPurple]

If anyone is getting errors when testing if the AI will see or hear you and go after you that deals with the blackboard returning none - just add an "? is valid" node before whatever the blackboard is connected to and plug the blackboard variable in there and it will work. It just needs to check before running the loop.

[@AliElZoheiry]

Thank you for sharing this helpful tip with the community! It's always great to see different solutions to common issues.

[@user-dbw]

Very nice AI tutorial, it helped me a lot ! thank you !

[@Rugged-Ranger119-vn9om]

For some reason the senses dont work for me, it shows that it sensed in the debugger but it doesn't print any strings or response to sight senses at around 25:00

[@AliElZoheiry]

Hey there, Make sure that the issue isn't with printing itself, sometimes when using the AI debugger, it disables print screen messaging from appearing. So make sure that everything else is being printed

[@ReeverGames]

This is by far the best tutorial on enemy AI , thank you so much, on every tutorial i have an issue where AI bump into each other when fallowing the player, i hope you can touch on that in this series, 🙏

[@AliElZoheiry]

Thanks alot Ashen! I briefly touched upon the subject of having many enemies in the level, and that for that use case you should probably use the "Detour Crowd AI Controller", but I will try to touch upon it nearing the end

[@Hato1992]

It's great first thing you do is to explain how to debug. It is most important thing because in 99% of cases something in tutorial doesn't work same way, because something has changes in engine or have a bit different config etc.

[@AliElZoheiry]

You're absolutely right! Debugging is such a crucial skill, and I'm glad you appreciated the focus on it. Thanks for your comment! 🙏

[@Renlay]

Hi I've followed up to the point where we implement Sound Sensing, but I have a different setup for Noise making which reports a noise event constantly when the player is walking around without crouching. Because of this, the AI is stuttering while trying to go to the location of the sound, but when the player stops sending noise events and the Listened Location isn't being changed anymore it stops the stutter and goes to the sound location. I was wondering if you had any solution to this! This is a very well done tutorial and has helped me lots and I'm hoping I can continue building off it ^_^! Thank you for this!

[@AliElZoheiry]

Hey! I'm glad to hear the tutorial has been helpful for you 🙏 For the stuttering issue, it sounds like your enemy goes to investigate the latest sound it hears, and since your player is constantly making sound, then the AI will constantly keep changing it's target location. You might want to add a delay between the AI changing their location. Meaning that after they go into the investigation state, they have to stay there for a few seconds, before sensing any new sounds, that should fix it

[@Renlay]

@@AliElZoheiry Thank you so much for the tip!! I may have fixed it by just making it so the AI doesn't go back into Investigation mode if they're already Investigating! That way, they only Investigate if they've gone back to Idle again or if they've been Alerted by sight. I haven't seen the AI stutter anymore 😄

[@gudakoccc2596]

Thank you! Your tutorials are so amazing! (start from game save and load tutorial series)

[@AliElZoheiry]

You're very welcome! Thank you for your kind words, I'm happy to hear that you've found my tutorials helpful. 🙏

[@azythegreat]

@2:10 : Hello, is AI Sight based on forward vector or head rotation?

[@AliElZoheiry]

Hey! The AI sight is based on the control rotation, so where the capsule is facing (i.e forward vector) not where the mesh is facing, because the AI perception is on the AI controller, that's why control rotation is what's used. If you want it to be based on the rotation of the mesh or part of the mesh (e.g head) then you'll have to build something custom

[@azythegreat]

@AliElZoheiry Tbh, I already made the sight-basrd-on-head-rotation version on ALS some months back but reluctant to add it to the main project due to optimization issues. So now I'm looking around for alternatives. Thanks for replying. Appreciate it. ✌️

[@cryptic_cranium]

Love the vid but I came into a problem near the end and everything was working fine but now when i make a noise and a enemy cannot see me it sends both the sight and the hearing senses through at the same time (know this because i printed text) anyone got an Idea why its doing this?

[@AliElZoheiry]

Hmm… not really sure what the problem is, but I recommend joining the Discord server and asking there, maybe someone encountered the same issue (link in the description)

[@shayaanali4444]

Hey amazing tutorial and I can't wait to watch the rest of the series. I was wondering how to make the AI enemy to stop chasing and attacking the player once out of sight, returning his passive state. Please let me know if you know how this can be done

[@AliElZoheiry]

You're very welcome! Glad you're enjoying this.The behavior you want is covered in part #9 of this series

[@drakorez]

In the "responding to sensing an actor" section why not just use the "On Target Perception Updated" node? I am still new to this, so I may be missing something, but it seems a lot easier that way. My understanding is that that node gives you a separate call for each time an actor is sensed, so you would not need to loop through an array each time.

[@AliElZoheiry]

Hey there, indeed it seems that it is easier to use, but at the time of making this video, I had some issues with "On Target anything.." I hope that by now they fixed those issues, but also using "On Perception Updated" isn't that much more complex, and gives us control over how to deal with each actor

[@jackiguess9826]

Great series so far! However one problem I found is that the draw or sheathe task will be interrupted by the Chase Player Sequence. Still very new to behaviour trees so not sure how to combat this right now. Thanks!

[@AliElZoheiry]

Hey, thank you for your feedback! The Sheath/Unsheath function shouldn't finish before the animation is over, so it shouldn't be interrupted by the ChasePlayer sequence since that sequence shouldn't even start before the first one is over. If the ChasePlayer sequence is indeed interrupting the other task, that means that you are ending it too early. So check that you are only ending it when the animation ends by binding to the event dispatcher, which should be called at the end of the animation

[@BowDrawn115]

Probably the highest quality tutorial I've ever seen. I love your vids!! One question tho, when I'm behind a wall and I make a sound, my AI is stuck in the Move To task and he just stands in place. I don't know why, same thing happens when damaging him from behind the wall I followed every single one of your steps and re-watched that part countless times

[@AliElZoheiry]

Hey there, thank you so much for your kind words and support! Not sure what the issue is, because the MoveTo shouldn't care about line of sight, as long as there is a path from the enemy to the player, the MoveTo should work correctly

[@BowDrawn115]

​@@AliElZoheiry I'm so dumb, it was a problem with the nav mesh not covering the area I was testing in... it's always those small things that mess me up haha. Thank you for your help man, I'll definitely keep watching your videos and you already have my sub!

[@twitchtutkunu576]

Thank you for your effort. I would like to know what is the way to detect not only the explosion sound but also when you run fast when it is nearby :)

[@AliElZoheiry]

You're welcome! To detect multiple sounds, you follow the same approach, just call the Make Noise function whenever you want to trigger a sound that the enemy Ai can hear

[@Xsabino1]

Your teaching is amazing, explains perfectly. thank you very much

[@AliElZoheiry]

You're very welcome 😇 and thank you for the support and kind words 🙏

[@edodemerzel7032]

Thank you for such detailed and consistent tutorials! In this video ForEachLoops nodes are used within some functions and events. Considering performance issues, does the ForEachLoop stop after the last array element is processed? Don't we need to set up loops breaking logic manually?

[@AliElZoheiry]

You're very welcome! I'm glad you're finding the tutorials useful. Yes, the ForEachLoop automatically stops after the last array element is processed, so you don't need to set up manual breaking logic. If you are looping over an extremely large array though (thousands of items) then I suggest using "For each with break" loop, which allows you to manually break from the loop once you have found what you're looking for in the array

[@edodemerzel7032]

@@AliElZoheiry Thanks!

[@XiueXelu]

Around 25:40, you mentioned we had a state in our Blackboard. I've been following along as close as I could, but "Get Blackboard" isn't an option for me in the "Get Current State" function (Unless I disable "Context Sensitive"). Followed the rest, but the AI doesn't move to investigate. I assume it's because that "Get Blackboard" option isn't working properly. I'm using UE5.3. I've been scouring this and the previous videos looking for where that blackboard info was implemented, but I'm not having any luck so far. Would anyone happen to know where that specific information is? I do have the BB_Enemy_Base blackboard and I have it looking the exact same as in these Tutorial series. I'm just trying to figure out if I did anything wrong.

[@XiueXelu]

Well, it doesn't resolve the "Get Blackboard" option not being present as described in my previous post, BUT I did resolve my issue with the NPC not detecting my Character when playing a sound. As it turns out, I forgot to plug the Array Element to the Actor in the AIC_Enemy_Base Event Graph.

[@AliElZoheiry]

Hey there! Glad you fixed part of your issue. If you're still unable to access the blackboard from your AI controller, make sure that you actually have a blackboard setup (but I assume you do if the perception is working), and you can also use the "blackboard" variable which instead of the get blackboard function if that one isn't working.

[@pennaverdeful]

Make sure you are the server when you fire Make Noise node, otherwise it will not work. Also, if the print text does not work, instead restarting the engine, you can type EnableAllScreenMessages in the game console and you are good to go

[@AliElZoheiry]

Hey, thanks for the tips! I'll keep that in mind. Appreciate the help!

[@ghostgamer260]

I can’t seem to get the enemy to go after the player unless I hit the hot key, any ideas?

[@AliElZoheiry]

Hey Ghostgamer, I see you asked the question on Discord, let's see if we can help you there.

[@ghostgamer260]

@@AliElZoheiry I’m about to start my drive home. After that I’ll hop on 👍. Thank you

[@HG-tu2xn]

Thanks for free knowledge. I have a little question. when I duplicate this enemy on my level, should they work the same? but i have only one enemy working properly. or does Behavior Tree Only Work for One AI Character Spawned? ed: "get all actors of class"

[@AliElZoheiry]

Hey there, the behavior tree is not a global object, meaning that for each instance of an enemy in your level, there is a separate instance of the behavior tree. So you can have as many enemies as you want and each will run their own copy of the tree.

[@HG-tu2xn]

@@AliElZoheiry thank you👌👌 I think I made a mistake in my code

[@matka5130]

EPIC quality...can confirm it works...thank you

[@AliElZoheiry]

You're most welcome Matka 🙏 glad you found it useful

[@Rosefield3D]

Loving this series! Fun fact: Real humans have a FOV of about 135 horizontal and 180 vertical :D

[@AliElZoheiry]

Glad you're enjoying the series! That's a cool fun fact about human vision 😄

[@anto-hn2gz]

I don't think it's precise, I can perceive objects behind my back, so my vision handles more than 180 degrees.

[@SantosThePerson]

great tutorial, really helpful and very well explained! Keep going with the hard work and if you ever make a tutorial about local co-op with various gamepads on UE5 or online multiplayer using EOS on UE5 that would be really fun and interesting to watch!!

[@AliElZoheiry]

Thank you Gonçalo! Really happy you found it helpful. I'll definitely consider your suggestion, sounds interesting

[@SantosThePerson]

@@AliElZoheiry I have been watching some of your videos and they are insanely helpful and insightful so I'm eager to see more!

[@mattgreen753]

The console command EnableAllScreenMessages fixes the bug where print string messages don't show up.

[@AliElZoheiry]

You're a life saver man! I've been having to restart the engine every time I use the AI debugger 🙏

[@jedtanartkulprakrom4616]

Teacher your Perception tutorial are amazing. Even complicated config function, You explain it very clearly even newbie like me can understand what this function can do. Also what is different about [Target] and [actor] in function Can Sense Actor mean, Isn't it the same that refer to self? PS.I just finished half of the Part 3 on to the set up thing and I got a big question in my head when teacher mentioned about C++ , So in the real process in making the game do I need to learn C++ to improve this function? Or I need to learn coding to understand more complicated thing ,Please guide me to the right path .

[@AliElZoheiry]

Hey, thank you for your kind words and your questions. I'm glad to hear that you're finding the tutorials helpful. Regarding your question. "Self" doesn't refer to the actor, self always refer to the current class you're in, so in the AI controller, self is a reference to the AIC_EnemyBase controller. Regarding C++, generally speaking, yes C++ will be required for working in actual company that uses Unreal Engine. Even though there as games built fully using Blueprints, C++ is required for performance optimization and low level systems building

[@erengungormez9161]

Hi, I didnt find *4:42* ai debugging. I pressing " and ' but not working

[@AliElZoheiry]

Check your editor settings to see which AI debugger key binding is set to

[@19857nono]

Thank you so much for the tutorial! informative & helpful! Yet I have a problem I don't know why my enemy ai doesn't switch state when hearing a sound/sight. It works when debugging tool, but it stucks in the passive state in patroling even I am within sight or make a noise. Would really appreciate some help!!

[@AliElZoheiry]

Hey there! Glad you found this helpful! Unfortunately I don't know what your exact problem is, but i suggest checking the conditions for switching states in the AI controller that they are being called as expected, and if so, then check the blackboard values and the decorator for switching states, that it is setup with the correct valuss

[@MistahX99]

Amazing series thank you so much for the quality content. I only have one question. Whenever I trigger a second sound whenever the enemy is investigation he doesnt break out of the sequence and needs to finish moving to, waiting and resume patrolling before he can react to another sound. How can we break out of the sequence and make it move to the new location since it's not switching state?

[@AliElZoheiry]

Hey there, I'm happy to hear that you're enjoying the series! To address your question, to allow one branch in the behavior tree to interrupt another branch, then in the "Decorator" on the "Lower priority" branch you should set the "Observer abort" value to be "Both" which means that once the value of the decorator changes, it aborts itself and anything of lower priority

[@MistahX99]

@@AliElZoheiry got you! Thank you for the reply not alot of KZbinrs take the time to do it

[@AVerdadeReconfortante]

Amazing tutorials!!! I'm learning a lot! Keep doing :)

[@AliElZoheiry]

Thank you 🙏 glad you're learning from my videos, hope you enjoy the rest

[@ericcrary2380]

At around 22:00, I can only get the sight string to print, and it only prints when I make the sound ;..) not sure if anyone knows why this might be based off this info. Been trying to see what I'm missing, restarted editor, still lookin. Edit FIXED!: My select node was all off by one. I had assigned sight to none, hearing to sight, and damage to hearing.

[@AliElZoheiry]

Glad to hear you fixed the issue! It's always those little details that can throw things off. Keep up the great problem-solving and learning!

[@callatogames]

Great Tutorial again, i loved this series :)

[@AliElZoheiry]

Thank you! Always happy to see that it's helping 🙏

[@Alternatywny_1]

I just realized that after this particular episode, I can start creating simple mobs for some hack'n'slash game :D

[@AliElZoheiry]

That's great to hear! I'm glad you found the episode helpful for your game project. Good luck with creating the mobs for your hack'n'slash game! 🎮

[@TopsonNoble]

Thank you so much for this awesome and amazing tutorial! I have one question though... I did exactly everything you did in this video and things are working perfectly! However, once the AI sights the player, it will keep chasing me forever even after I go out of sight... How do I make the AI go back into patrolling state when the player gets out of sight?

[@AliElZoheiry]

You're very welcome! I'm glad to hear that everything's working perfectly so far. For the AI to return to patrolling after losing sight of the player, this requires extra functionality that will be added in Part #9 of this series

[@perrobravomx4206]

Super useful! thanks again, great tutorial as usual!

[@AliElZoheiry]

My pleasure! Glad you liked it

[@callatogames]

Dear Ali, my apostrope key is not working, nothing changed at the screen, would you help me?

[@AliElZoheiry]

Hello, I'm not really sure what the issue is, the default key for the version of UE i'm using is the apostrophe key, you can also check your keybindings in the project settings and see if the gameplay debugger is set to something other than the apostrophe key, then you can change it

[@callatogames]

@@AliElZoheiry Thank u for the answer, well i had changed that key and it is working now, thanks, i appreciate that🙏

[@AliElZoheiry]

@@callatogames my pleasure, glad it works now 🙏

[@gregorte]

apostrophe key, fpr gameplay debugger, activation key, keybind settings so on.. I searched a lot (german windows and german keyboard) and actually in project settings if I input "Gameplay Debugger" it is not found. But it is shown on the left in the option list. If you search for the right key to change: Go to "Edit" "Project Settings" In search bar, type in: "activation key" And it should show "Engine - Gameplay Debugger" and "Input" and "Activation Key" -> HERE you change your key 😎

[@devmasterkira]

Hi! Excellent videos! i want to ask you about an issue i have... my AI only sight, i configure Hearing and pain, but only Sight work, i remove the Sight sense and it don't detect nothing.

[@AliElZoheiry]

Hey there! Thank you for your kind words. It sounds like you're experiencing a peculiar issue with the AI senses. Have you double-checked the configurations for sound and damage senses to ensure they are set up correctly? It could be a small configuration issue causing the problem

[@devmasterkira]

@@AliElZoheiry Hello! I deleted the component and added it again, then Hearing started working, but Damage and Touch still didn't do anything, what I did then was move the AIPerception to the AIController, and everything started working without any problem, now I have the Sense inside the Controller and all the functions inside the character.

[@vannessaborrero]

Love your tutorials! Hands down the best tutorials regarding enemy AI in KZbin. I have just one question. How do I allow interruptions in the investigating state? For example, let's say you make a sound and the enemy begins to approach the area of the sound. If you create another sound at another location, I want the enemy to stop their route to the 1st sound and make way to the 2nd sound. I can't do that with the behavior tree in its current state, and I spent hours trying to figure this out with no solution as of yet. I thought a decorator might help, but it just freezes at the sound location. Any help is appreciated!

[@AliElZoheiry]

Hey there, thanks for your kind words! There is an option called "Notify Observer", by default this is equal to "On Value Change", and if you have "Observer Aborts" set to "self or both", that means that this branch will get interrupted if the "VALUE" of the decorator changes. But.. if you change the "Notify Observer" to be equal to "On Result Change". This will interrupt the branch anytime the variable is changed, EVEN IF the value itself didn't change. That means that if the "State" is "investigating", and then something happens and updates the state to "investigating" again. The decorator will still abort. That might be what you want to do. Try it out and let know.

[@vannessaborrero]

@AliElZoheiry I tried this and it doesn't work 😔 I tried it in both the beginning sequence of the investigating tree and under each of the tasks.

[@AliElZoheiry]

It should interrupt if you have the observer abort set to self or both and on result change instead of on value change. But if it's not working then you can try a different solution, which is to add a 2nd decorator that checks if the value of the investigation location has changed, and if so, it interrupts and starts over

[@stoneddevstudios]

How did you get the debugger to work without the numpad? Having trouble finding that. No info seems available when I search

[@WitcherKING]

@stoneddevstudios If you are still stuck, it's Under Project Setting > Engine > Gameplay Debugger. Now this (GD link) is on your left Panel. Don't try to search it in all settings search box, you won't see anything even though it comes in listed but nothing in it. wasted an hour searching everywhere. everyone telling the option but no idea about the mistake everyone making is "searching the setting as normal instead looking into left panel. 😶

[@AliElZoheiry]

Thanks for answering @WitcherKING, that is indeed the correct way

[@gauravsolanki1103]

5:02 i've pressed 4 and it did not work please help me 😥😥😐😐

[@AliElZoheiry]

It might be a different number for you, depending on your setup, but once you open the AI debugger using the apostrophe key, you will see in the top left corner, which numbers correspond to which debugging tools, and note that the default is num pad keys and not the regular number keys, so if you don’t have a numpad (like me) you will have to rebind those keys in your editor settings

[@gauravsolanki1103]

Finally after 3 days it is finally done thank you ali bro 🙏🙏@@AliElZoheiry

[@HeartsintheWind]

Do you cover the allies, enemies, and neutrals on the perception piece? How does one use this system with these? Is there a way to make something like it for the blue print system?

[@AliElZoheiry]

In this series I only cover enemy AI behavior, but the tools and techniques used are the same for any type of AI

[@gudakoccc2596]

You can add extra functions about team number and is enmey, and use team number equal to define if it is enemy, also give Normal NPC\Player\Enemy\..., a team number

[@유희영-h5i]

감사합니다 선생님... 잘보고있어요. 오늘도 달려~!~~~!!!!!

[@AliElZoheiry]

감사합니다! 저의 비디오를 즐겨주셔서 감사합니다! 함께 달려봅시다!

[@xxrajeevxx]

Ali, absolutely Amazing Tutorials and I love the pace you are running these and excellent content. Question, I created this blackboard on the base enemyBP and then created 2 child BPs, set their patrol route correctly, but only one of them actually utilizes the blackboard. the second one just stands still. any suggestions?

[@AliElZoheiry]

Hey there! Thank you for your kind words! Regarding your question, I'm not really sure what you mean by creating a blackboard on an enemy BP, blackboards are assigned to behavior trees only, and are accessed from an AI controller. So I'm not really sure what you mean :D

[@Snafuey]

By far you have the best UE tutorials!

[@AliElZoheiry]

Thank you so much Snafuey. I really appreciate the support 🙏

[@DsDylan-fs8lo]

Hello, thank you very much for your videos. I wanted to ask you how to make several enemies hear and see at the same time. Because I've only managed to get one to listen and the rest not. Obviously I don't need a complete answer, just something to know where to start investigating.

[@AliElZoheiry]

Hey! Thanks for your message, I really appreciate it 🙏 The default behavior is for multiple enemies to hear at the same time, you shouldn't need to do anything extra for that, if that's not working, there must be a bug somewhere

[@DsDylan-fs8lo]

@@AliElZoheiry Thank you very much and I was able to detect the error. You are the best.

[@blackearlmax]

Hi! I don't understand. what is the problem. My bot starts an investigation, but constantly moves towards the player, although its target point is the place of noise (location from the stimulus)

[@AliElZoheiry]

Hey there! If you have sight senses setup, then as soon as your enemy sees your player, it will switch from investigating to attacking. Make sure to check which state the enemy is in and debug the issue there

[@DorianDodo-mt2cy]

Hey Ali, Thank you for this amazing tutorial. I have question. When there is a small obstacle between the player and the AI, the AI Perception doesn't see the player and It's because the AI perception is locked on the center of the player character. Therefore, even if I'm standing up in behind a table, the AI can not see me. Do you know if there is a possibility to change where the AI perception targets the player please ?

[@AliElZoheiry]

Unfortunately with the default AI perception system, you can't change the location where the AI looks to. You'd have to build custom functionality for that or use a different plugin

[@tkclef]

Please can I use this same system of behavior tree with c++ instead of blueprint?

[@AliElZoheiry]

Behavior trees themselves are an "in editor" tool, they are not blueprints, but they are also not a C++ class. You can interact with blackboards and behavior trees through C++ normally of course, and you can call C++ functions from your behavior tree if they are exposed.

[@tkclef]

@@AliElZoheiry I implemented your tutorial using just behavior tree and blueprint but from an inherited c++ character class and it worked. Is't a safer way?

[@tkclef]

@@AliElZoheiry And I had performance issues becuz of the Nav process volume. But I decreased the scale to 200×200 on a landscape of 505×505. The performance improved.

[@tkclef]

@@AliElZoheiry Please can I reach you on discord, I would like to ask some few questions about AI?

[@Женёк-д1и]

So far so good. I was able to implement everything you said though part 1, 2, 3. Thank you very much for posting it here for free! One question. So i have a door in my game but even if its open, the ai does not go through it. I made sure that the NavMeshBound is covering it. Do you think it has to do with the collision of the door?

[@AliElZoheiry]

Hey there, this is a common issue with nav meshes because they don't update automatically when something changes, like a door opening or a box moving. To update the navmesh you have to setup the door to be a navmesh modifier. Checkout this tutorial that explains that well kzbin.info/www/bejne/ZnK0q3erh9mNpK8

[@Женёк-д1и]

@@AliElZoheiryThank you! The link you sent helped me solve the issue and understand better wabout it.

[@AliElZoheiry]

@@Женёк-д1и glad to hear that it works now! Keep up the food work 💪

[@DiaaAlhalabi376]

Thank you for this beautiful course, but I have a question. I want to understand un5 your triangle completely in order to do that. How did you learn it with this understanding? Do you memorize the methods or invent them?

[@AliElZoheiry]

Glad you're enjoying it! When learning, I didn't try to memorize anything, I kept googling everytime I wanted to do something, and I found myself googling the same thing over and over again until I memorize it. But the best way to learn, is to have an idea in your head that you want to build and keep researching, watch a lot of videos, keep trying different things. Trial and error is your best friend. If you are not making mistakes, then you're not learning

[@DiaaAlhalabi376]

Thank you. I will do the same. I hope you continue these great chains. Great work. “The Godfather of un5”@@AliElZoheiry

[@fahimjaowad8717]

Why are these free lol. Such great quality videos. Please don't take them off youtube. :(

[@AliElZoheiry]

Don't worry, these will be free forever 🙏😌 glad you found them useful