How do I use the Behavior Tree to create simple basic AI in Unreal Engine 4. We cover from a blank scene creating everything we need to have an AI chase down our player. Source Files: github.com/MWa...
Good sir you're tutorial has saved me. I have been stuck trying to make an AI move for so long and now I've done it. I was stress out for days trying to figure it out for my project and now I'm so relieved I could cry tears of joy. Thank you so much!
If you are having a hard time getting this to work, swap out the Event Receive Activation with Event Receive Search Start AI. Also, plug the Get player controller directly into Set Blackboard Value as Object, no Controlled Pawn needed. Not sure why this one was such a doozie, but if it helps anyone else, there ya go.
Looking forward to seeing the more advanced AI setups! Could you please cover using the Perception System? This is something that I struggle with. edit: Okay, I see on your request list that someone has already requested this.
+redchant Yep I plan and hope to cover all of the different AI features of the engine. I might not make a squad based enemy tactics system in place but hope to cover all that one would need to do it themselves. At this point 1 or 2 more basic AI tutorials covering some more fun stuff should be next, then some another topic or 2 and then I plan on covering the EQS system in detail. At that point whatever is not covered basic enough for AI I hope to cover so any of the floating AI nodes like the perception stuff, sound, visual, etc. I plan on covering.
So I'm having the issue of the FindPlayerService sequence seemingly not ticking and I don't know if that's the sole issue that's causing this to not work. This is in UE5 so I'm sure there's bound to be some differences but everything else seems to be correct and working.
How the heck do I hook the AI into a Pawn-based class instead of a Character-based class? I don't want to use the CharacterMovement component. Is there a way to hook this up to my own movement functions?
I've watched this video 3 times now, and can't get my behavior tree to run, no idea what I'm missing 😢 edit: just found out because I had my BP spawned in, I needed to set the auto possess AI to "Placed in world, or spawned"
Whats the difference between using an AI controller as opposed to duplicating the default player character like most tut's show? Can always count on you to do things properly, sick of the tut sections being littered with wrong way of doing things, like why handle everything in BP if there are perfectly good behaviour trees provided to us, doesn't make sense, I'm still a noob so won't question them. But I want to know the corect ways of doing tings
+Ethan Dodge That is a good question and I really just use it as that is the way it is supposed to be done. I have never tried using AI trees or functions (like the nav meshes or blackboards) on a normal player controller before. From a quick glance the AI controller itself comes with a few things already set up for AI like the Path Following Component while the Player Controller has some extra things that would not be used like interface interactions and controlling a pawn by player input. I would say off the top of my head the Player Controller might work for AI but it would be overkill if it does and it makes sense to use the AI Controller for the designed AI features of the engine and I have never had an issue with it so I guess that is why I use it =)
I have no idea if you're still replying, but when my character dies, using destroyActor and then after respawning and possessing, the "player key" or player object value sets to "none". Meaning the AI won't have a target to move towards, because appareantly my players id changes.
I did everything exactly as you did it and it is still saying the player key is not set, the tree is stuck at the root. I really do not understand why this is happening.
Okay I just got it to work, my nav mesh was too small. You should probably mention in an annotation that the nav mesh should be tall enough to fit the characters.
Hi. I'm making a 2D side scroller. For some reason I cannot drag out the AI Actor into the editor. I tried adding it to a pawn and empty character but it won't show up. How can I add it to the game?
So I followed this with my enemy and character. I am curious how it knew to move toward me (all of my characters are custom imported and no templates are used.) I have the behavior tree associated with my enemy ai, however, I am confused at to what part of the behavior tree/ service/ controller component is what is causing the enemy to follow me. Sorry, I am quite noobish. Another question I have is, I do have animations, such as idle-walk as a blend space for my enemy ai. I also have run cycle. I want the enemy to know to use the idle if it is just standing there, walk to destinations/points to patrol. Specifically when it sees me it run toward me. I have looked on countless tutorials but no one specifically that I can find tells me how to do that from scratch. They are always past that point. Plz help, how can I implement my blend space for my idle enemy ai as it's default state. (I already used a reference on the character to the animation blue print of course.) I just do not know if I am missing blue prints in my character or what they should be. sorry for the long questions.
