Shame that thats jot the case most of the time, finding quality teachers that give you the information in a way you can digest is much harder then i originally thought
if you are a beginner, you could also switch walk speeds by random selection for the zombies in addition to the query system. I.E. get random float within range set speed 590-610.
"sometimes you make these you have to restart the editor for them to take effect" - was worth looking through tutorials. Damn, now my test setup works.
Thank you for the tutorial. Nav Queries are must know things if you are working on AI. You can make your AI pick another path if there is a predator in it's path by using Navigation Query. It's really useful. Or you can use it as a avoidance. All these options are working in runtime so it's really useful.
I was able to use this to blend a dynamic nav mesh with navigation query filters to build a system where creatures surround you and attack from different directions (like raptors)
Duuuuude...you're awesome! I'm working on a Nazi zombies clone and I couldn't figure out how to get the AI to avoid obstacles that weren't purchased instead of just running up to them and standing there. Thank you!
I was having this same issue with a level that had a lot of corners (office building) and the AI folks were having issues turning the corners. This worked like a charm.
If all you want to do is have a larger margin to corners, instead look into adjusting the "Actor radius" in both the Project Settings and the AI pawn's "NavMesh movement"! This adds a margin to walls in the NavMesh automatically (just be sure there are no corridors that are too narrow for them)
Hey nice video, I initially thought this was going to be an EQS video, but it turned out to be a completely new thing, thanks for putting the time to research the topic, are there any docs you can share about this topic to go more in depth ?
I know this video is 3 years old, but it seems really helpful. Can we use this to have certain enemies avoid certain areas? Example: Hot panels on the floor. Player can run over them, and basic enemies can run over them. both taking damage, but I want to also have a smarter enemy, that avoids these zones, and will go around. The nav mesh seems to only be an all or nothing deal, so this seems in the right area. would this work for what I am I going for?
Hello! While this is a nice feature presentation, have you thought of using avoidance or flocking instead? As a solution the problem (bulking up), flocking would probably provide a better tweakable result in the end product especially for dynamic environments. In UE4 it would seem that they call it Crowd following component: docs.unrealengine.com/en-US/API/Runtime/AIModule/Navigation/UCrowdFollowingComponent/index.html I'm not sure how blueprintable it is but on a discussion board people seem to have made their own blueprint version of it. Note: docs.unrealengine.com/en-US/BlueprintAPI/Pawn/Components/CharacterMovement/SetAvoidanceEnabled/index.html That is for the avoidance if it wasn't already turned on and it would seem.
crowd following component is pretty expensive if im not mistaken. This is a very low cost solution that worked for me when I had ~100 AI alive at a time
@@ue4withcasey391 it is not impossible that the component takes a lot of CPU time. Even a good implementation of RVO requires decent optimizations since the algorithm itself expands in O(x²). However, I'm certain Epic teams are well aware of that and have provided someways to mitigate that problem. I didn't mean to offend regarding the choice of solution. Rather I was aiming at trying to inform you that such problem had a typical solution. Exploring another solution is also a good experience. While working with homogenous actors and a determined and static environment it is probably possible to "enhance" the navmesh with such coloring. However when the actors aren't the same, the environment moves and/or the player(s) abilities varies, having a static set of data might not be enough to represent the complexity.
Hello. This is exactly what i need in the moment. Thank you for that! =) Can you do me a favor and answer me one question? For me this is VERY important. My problem is that obstacles are overcome if there is no other way. This is fine for most situations. But not for a train, for example. It may only drive on the rails and should not suddenly go over the mountains because the rails are blocked. As far as I know you can only increase the costs for a Nav Area and not say that you can no longer drive there. So. How would you handle a train? :)
a train as in you have fixed rails that it moves forward or backwards on? that shouldnt be using a navmesh at all. You would use a spline (the tracks) and use math to move the train forward or backwards on the tracks.
@@ue4withcasey391 Hello. Thanks for the answer. Unfortunately thats not an option for my game. In this case i need to change an "obstacle" into "null" for a particular controller. Is there a way to do this? :)
Ok now try to do this. There only 2 paths to reach the player. One ai is blocking one of the paths making the other ai to choose the other path. I’ve been messing with the navmodifier component on my ai but I can’t get the ai to ignore his own modifications. So essentially i’m trying to make the area around the ai a higher cost for all the other ai. This video (great info btw) is the closest solution to my problem but not quite what i’m looking for. Any suggestions?
UE4WithCasey yeah, problem is that the owner responds to their own modifier making the area they’re in an obstacle so they just aimlessly wander in circles trying to escape their own area lol.
@@everettlee79 Good point. The mesh doesnt update fast enough so I dont think you could turn off the modifier, find the path, then turn it back on either. Its also unreliable to find 2 separate paths, one to the edge of the modifier towards your destination and then a second from that point just at the edge of the modifier to the actual destination. Thats a tough one
UE4WithCasey yep. I tried flip flopping on and off real quick. Didn’t work. Looks like it’ll be tougher than I hoped. Thanks for crushing my dreams lol.
can you shared this scene for better understanding ? because I try do it but don't works and I don't know why, thank's ;) I do that with behavior tree, maybe it not compatible
I hate this part about Unreal's Ai system. Unity this built. All you need to do is feed in a value that states how much distance does and Ai keep from another Ai
This is how tutorials should be. Good audio, well articulated, concise and to the point.
Shame that thats jot the case most of the time, finding quality teachers that give you the information in a way you can digest is much harder then i originally thought
I can't believe how long I spent last week trying to randomly offset enemy movement when this feature already exists! Great tutorial :)
if you are a beginner, you could also switch walk speeds by random selection for the zombies in addition to the query system. I.E. get random float within range set speed 590-610.
"sometimes you make these you have to restart the editor for them to take effect" - was worth looking through tutorials. Damn, now my test setup works.
It is a really great tutorial that not just telling you how to set, but tell you why to set and how to affect the world by these setting. Nice :D
Thank you for the tutorial. Nav Queries are must know things if you are working on AI. You can make your AI pick another path if there is a predator in it's path by using Navigation Query. It's really useful. Or you can use it as a avoidance. All these options are working in runtime so it's really useful.
Very interesting content and very well explained. Thanks a lot!
This is gonna be it.
I've seen 5 videos in a row that said exactly the same thing. Please, god, let this be it.
Nice video, will definitely be using this soon. I imagine with would work especially well with Rvo avoidance.
What a great tutorial thank you!
Well, this is incredible
very awesome , god bless you 🌼
Great video! Thanks, that explained exactly what I was looking into!
There are also these flags which look very funny...
You are a life saver my dude
I was able to use this to blend a dynamic nav mesh with navigation query filters to build a system where creatures surround you and attack from different directions (like raptors)
Good video! This is what I want to find. Thank you！
Great tutorial!
very good tutorial
This video Tutorial should be a reference for everyone Who want make an tutorials about UE.
This is how tutorials should be Done.
Thanks good info
Duuuuude...you're awesome! I'm working on a Nazi zombies clone and I couldn't figure out how to get the AI to avoid obstacles that weren't purchased instead of just running up to them and standing there. Thank you!
I wonder if you could use something like this for accuracy on ai with shooting for area instead of the center
I was having this same issue with a level that had a lot of corners (office building) and the AI folks were having issues turning the corners. This worked like a charm.
If all you want to do is have a larger margin to corners, instead look into adjusting the "Actor radius" in both the Project Settings and the AI pawn's "NavMesh movement"! This adds a margin to walls in the NavMesh automatically (just be sure there are no corridors that are too narrow for them)
@@MrRailden Thanks...I'll give that a try as well.
Hey nice video, I initially thought this was going to be an EQS video, but it turned out to be a completely new thing, thanks for putting the time to research the topic, are there any docs you can share about this topic to go more in depth ?
As far as I know there is little to nothing in the Docs about the query filters. They have some stuff about nav modifiers.
hallo! what is - Nav Flag in Query Filters?
I know this video is 3 years old, but it seems really helpful.
Can we use this to have certain enemies avoid certain areas?
Example: Hot panels on the floor.
Player can run over them, and basic enemies can run over them. both taking damage, but I want to also have a
smarter enemy, that avoids these zones, and will go around.
The nav mesh seems to only be an all or nothing deal, so this seems in the right area.
would this work for what I am I going for?
Enabling RVO on the character movement component for the AI character will prevent the AI from bottle-necking each other while chasing you.
RVO has drawbacks. I couldn't use it for some of my games. It is a possible alternative, just not guaranteed.
Hello!
While this is a nice feature presentation, have you thought of using avoidance or flocking instead?
As a solution the problem (bulking up), flocking would probably provide a better tweakable result in the end product especially for dynamic environments.
In UE4 it would seem that they call it Crowd following component:
docs.unrealengine.com/en-US/API/Runtime/AIModule/Navigation/UCrowdFollowingComponent/index.html
I'm not sure how blueprintable it is but on a discussion board people seem to have made their own blueprint version of it.
Note:
docs.unrealengine.com/en-US/BlueprintAPI/Pawn/Components/CharacterMovement/SetAvoidanceEnabled/index.html
That is for the avoidance if it wasn't already turned on and it would seem.
crowd following component is pretty expensive if im not mistaken. This is a very low cost solution that worked for me when I had ~100 AI alive at a time
@@ue4withcasey391 it is not impossible that the component takes a lot of CPU time. Even a good implementation of RVO requires decent optimizations since the algorithm itself expands in O(x²).
However, I'm certain Epic teams are well aware of that and have provided someways to mitigate that problem.
I didn't mean to offend regarding the choice of solution. Rather I was aiming at trying to inform you that such problem had a typical solution. Exploring another solution is also a good experience.
While working with homogenous actors and a determined and static environment it is probably possible to "enhance" the navmesh with such coloring. However when the actors aren't the same, the environment moves and/or the player(s) abilities varies, having a static set of data might not be enough to represent the complexity.
@@xearus No offense taken. I had tried some of the RVO stuff and it moved the performance needle a bit much for what I was using it for.
thx i always want to know how this work
Hello. This is exactly what i need in the moment. Thank you for that! =)
Can you do me a favor and answer me one question? For me this is VERY important. My problem is that obstacles are overcome if there is no other way. This is fine for most situations. But not for a train, for example. It may only drive on the rails and should not suddenly go over the mountains because the rails are blocked. As far as I know you can only increase the costs for a Nav Area and not say that you can no longer drive there. So. How would you handle a train? :)
a train as in you have fixed rails that it moves forward or backwards on? that shouldnt be using a navmesh at all. You would use a spline (the tracks) and use math to move the train forward or backwards on the tracks.
@@ue4withcasey391 Hello. Thanks for the answer. Unfortunately thats not an option for my game. In this case i need to change an "obstacle" into "null" for a particular controller. Is there a way to do this? :)
Ok now try to do this. There only 2 paths to reach the player. One ai is blocking one of the paths making the other ai to choose the other path. I’ve been messing with the navmodifier component on my ai but I can’t get the ai to ignore his own modifications. So essentially i’m trying to make the area around the ai a higher cost for all the other ai. This video (great info btw) is the closest solution to my problem but not quite what i’m looking for. Any suggestions?
Do you have the runtime navmesh settings turned on? Inside the project settings theres a drop down to allow the navmesh to be manipulated at runtime.
UE4WithCasey yeah, problem is that the owner responds to their own modifier making the area they’re in an obstacle so they just aimlessly wander in circles trying to escape their own area lol.
@@everettlee79 Good point. The mesh doesnt update fast enough so I dont think you could turn off the modifier, find the path, then turn it back on either. Its also unreliable to find 2 separate paths, one to the edge of the modifier towards your destination and then a second from that point just at the edge of the modifier to the actual destination. Thats a tough one
UE4WithCasey yep. I tried flip flopping on and off real quick. Didn’t work. Looks like it’ll be tougher than I hoped. Thanks for crushing my dreams lol.
UE4WithCasey Sounds like a great video opportunity if you can crack it ;)
Its great to know but not a silver bullet.
can you shared this scene for better understanding ? because I try do it but don't works and I don't know why, thank's ;) I do that with behavior tree, maybe it not compatible
I hate this part about Unreal's Ai system. Unity this built. All you need to do is feed in a value that states how much distance does and Ai keep from another Ai
How can you brain work so fast ...