#gameplay-ai | Unreal Source | Page 119

fallow hound Dec 7, 2019, 2:01 PM

#

😦

#

well

#

the vislogger menu has a load button

#

have you checked cooked log directory?

#

looks like there are .bvlog files the vislogger can load

slow bobcat Dec 7, 2019, 2:07 PM

#

my main problem is that I can't make it record/open while running a cooked build in DebugGame (or Development) without the editor. I found in UDN an old post (2016) where someone was manually adding the VisLog module to compile in non-editor builds.
I don't even need the VisLog tool to show. All I need is "start recording" "end recording" really

fallow hound Dec 7, 2019, 2:08 PM

#

hmmm, its gotta be possibke

#

maybe there is a console command?

slow bobcat Dec 7, 2019, 2:09 PM

#

yeah, VisLog but it doesn't do anything. I'm launching the game again and trying the command. Maybe there's a problem in the log and I missed it

#

ok, so there's a problem

[2019.12.07-14.09.51:177][568]LogModuleManager: Warning: ModuleManager: Module 'LogVisualizer' not found - its StaticallyLinkedModuleInitializers function is null.
[2019.12.07-14.09.51:178][568]Command not recognized: VisLog

#

I guess I should try this?

📎 unknown.png

fallow hound Dec 7, 2019, 2:11 PM

#

hmmm that might do it

#

https://docs.unrealengine.com/en-US/BlueprintAPI/Debug/VisualLogger/EnableVisLogRecording/index.html

Enable VisLog Recording

#

can you package w/ that node?

#

might be easier if so

slow bobcat Dec 7, 2019, 2:13 PM

#

but... will I not have the same problem? if the module is not loaded, that will fail too right?

fallow hound Dec 7, 2019, 2:13 PM

#

ue4 is sometimes smart and will auto package needed stuff for BTs

#

sorry meant BPs

#

but word of warning

#

sometimes it will package something not compatible with packaging

#

so you might need to manually remove it from your .uproject if that happens

#

it does that w/ utility blueprints sometimes

slow bobcat Dec 7, 2019, 2:16 PM

#

ok, I'm going to try to add the module if Target.Configuration != UnrealTargetConfiguration.Shipping. If that doesn't work, will try your approach

fallow hound Dec 7, 2019, 2:16 PM

#

cool, im curious lemme know how it goes

slow bobcat Dec 7, 2019, 3:08 PM

#

@fallow hound
ok, I managed a way to have this working in Debug Game (Haven't tried in Test Builds yet)

on MyGame.Build.cs, add this

if (Target.Platform == UnrealTargetPlatform.Win64)
{
    DynamicallyLoadedModuleNames.Add("OnlineSubsystemSteam");
    if (Target.Configuration != UnrealTargetConfiguration.Shipping)
    {
        PrivateIncludePathModuleNames.Add("LogVisualizer");
    }
}

in MyGame.cpp add this:

#if !WITH_EDITOR && !UE_BUILD_SHIPPING
#include "ILogVisualizer.h"
#include "VisualLogger.h"

IMPLEMENT_MODULE(ILogVisualizer, LogVisualizer);
#endif

last step is to enable/disable vlog recording. I use a cheat command to do it. So, in MyGameCheatManager.h/cpp:

.h

UFUNCTION(exec)
void MyGame_VisLog(bool Record);

.cpp

void UTheAscentCheatManager::NG_VisLog(bool Record)
{
#if !UE_BUILD_SHIPPING //this is probably not needed since the cheat manager is disabled in Shipping builds, but just in case you want to add more checks
    if (FModuleManager::Get().LoadModulePtr<IModuleInterface>("LogVisualizer") != nullptr)
    {
        FVisualLogger::Get().SetIsRecordingToFile(Record);
    }
#endif
}

Then, once you are running your standalone game (either from VS with cooked data [Test/Development] or using the .exe) (Debug/DebugGame/Development), just run
the command MyGame_VisLog 1 to start recording. MyGame_VisLog 0 to stop.

It will generate a file in MyGame\Saved\Cooked\WindowsNoEditor\MyGame\Saved\Logs with the bvlog extension. That's the file you need to open later in editor using the Visual Logger Tool

#

This is for PC. Haven't test in any devkit. So use with caution

reef birch Dec 7, 2019, 3:21 PM

#

this has probally been asked a few times before, but whats the proper way of handling ai to attack nearest target,

#

i cant seem to get ai perception working without ai moving all over the place between more "sighted" actors

#

i guess i need ai perception to perceive all actors and make a selection based on that.

#

is there anymore who can guide me in the right direction/

#

tutorial that i missed and someone has knowledge of?

slow bobcat Dec 7, 2019, 3:26 PM

#

ok, so V.Logger only works on Desktop and it doesn't work in Test Builds neither. So, if you try my approach, make sure you check for UE_BUILD_TEST too

📎 unknown.png

fallow hound Dec 7, 2019, 3:26 PM

#

@slow bobcat interesting thanks for the update

slow bobcat Dec 7, 2019, 3:36 PM

#

@reef birch
what do you mean by more "sighted" actors ?

Anyway, what I do is this:

I keep track of the targets I sense/lose
I have a weight system in place that, basically, assigns weights to targets. i.e: 1st target I see, 100 pts for 1st time. If the target hurts the ai, add something like 1pts per damage point.
if the target is killed or runs away (out of sight), I removed it from my list (the perception will call a function informing you that an actor was lost).
once I lost/killed my target, i check my list of available targets and I pick up the one with the heaviest weight and I add +100 (swap target score).

Thanks to this, you can have scenarios in multiplayer where:

ai targets player 1 (score is 100).
player 1 deals 5 damage (score is 105).
player 2 comes to help you, and starts attacking the AI that's is bothering you. Player 2 has a weapon that deals a lot of damage. Let's say 20pts per bullet.
while P1 is being attacked, player 2 shoots 6 bullets to the ai. P2 score is now 120pts.
because P2 weight > P1 weight, the AI focuses on P2 and it adds +100 (swapping target score). P2 score is now 220 pts now.
This means that, if P1 wants to get the AI attention and be the target, it will have to deal P2 score +1.
The swap score prevents a ping pong effect where 1pt more can change targets.
You can add weights for distances, armour, weapon types etc.

I also have a system using g.tags and "CanBeSeenFrom()" where AI perception ignores actors with certain tags. ie: state.cloaked (invisible).

Very high level explanation, but might give you some ideas

#

Anyway, start with something simple. Something like "On Actor detected, make it my target and do not swap target until X has happened"

reef birch Dec 7, 2019, 3:41 PM

#

@slow bobcat thx for advise/answer

#

ill see what i come up with. since i just dropped the ai perception as a whole and using pawn sensing now, i meant by more sighted actors, more options to choose from. so if i have 2-3 targets the ai cant decise wich one to choose and will go back and forth between the targetted actor like a maniac

#

if that makes any sense my answer

slow bobcat Dec 7, 2019, 3:44 PM

#

yeah, sounds like your AI is choosing a new target every time it senses one. I would create a component, something like AITargetManager and deal with this. Have some logic to control when and why I would make something my target

austere temple Dec 7, 2019, 4:58 PM

#

Don't know if this channel is the best place to ask this:
I'm looking for some info how to make influence maps in UE4, but I'm having troubles finding info about UE4 implementation of the concept.
I'm a newcomer to scripting, but I want to read up on on this as I really want to get to the point where I can mess around with the AI and the influence maps will be something I need to do for that.
So, I would be grateful if you could point me in a right direction.

fallow hound Dec 7, 2019, 5:16 PM

#

hi all, I'm curious to hear people's thoughts on NPC aiming in an FPS

#

Particular in terms of implementing balance into AI tasks and the BT

#

I'm thinking, when an NPC see's a player the two important factors are delay until firing, and accuracy when firing

#

delay until firing is partially animation based. The npc has to rotate towards the player, and maybe allow an aimoffset to lerp to its goal. But maybe that could be padded out with simple delays too

#

accuracy could be done a lotttt of ways

#

kind of hard to wrap my head around. I'm thinking score bases system, probability of hit ups as NPC is closer, player standing still, etc. etc.

#

then there's the matter of what kind of attack.... burst fire. Dump a whole mag? careful single shots?

simple crest Dec 7, 2019, 5:21 PM

#

I'm just starting to tackle these things too. My first idea is going to be to have a delay variable in my AI actions (tasks). I'll normally set this to like... 0.1. The execute code doesn't actually start running what the task is supposed to do until the task has been running for at least that long. My other idea is to put all new actor perception information into a brief queue with a small delay before it actually enters my target list array

#

Select between different fire mode tasks based on distance to the target and the weapon stats. Accuracy as you said... Lots of ways.

fallow hound Dec 7, 2019, 5:30 PM

#

yeah, thanks for sharing

#

it seems like AAA devs like to tie animations into AI sometimes

#

so part of balancing might be "what looks best"

reef birch Dec 7, 2019, 5:35 PM

#

@fallow hound what an idea might be is to get all bone names for example and pick a random bone name from the array and use that as location

#

might not be the best solution

#

but can give a start

#

shoudnt listen to me btw, im very new

fallow hound Dec 7, 2019, 5:37 PM

#

hah, I appreciate the thoughts anyways!

reef birch Dec 7, 2019, 5:38 PM

#

i was mindboggeling about this one aswell,,

#

gonna start soon make a proper npc with aim offsets etc

patent hornet Dec 7, 2019, 6:01 PM

#

driving shooting directly from animation just introduces another layer that can break imo

#

driving shooting directly from animation just introduces another layer that can break imo

#

animation is driven by gameplay model, shooting should be too

fallow hound Dec 7, 2019, 6:04 PM

#

interesting, good point

simple crest Dec 7, 2019, 6:25 PM

#

one I agree with. our recoil and bullet spread is all on the CPP side, the animation "recoil" is purely cosmetic moving the character's gun & arms back and forth

fallow hound Dec 7, 2019, 8:47 PM

#

Is setting a blackboard value to update on tick okay? I'm specifically looking to update time since an actor was last seen.

slow yacht Dec 7, 2019, 9:39 PM

#

anyone ever come up with a way to handle client side AI navigation for a top down point + click style game?

pine steeple Dec 7, 2019, 9:50 PM

#

@fallow hound @slow bobcat https://www.thegames.dev/2019/08/21/adding-a-custom-gameplay-debugger-page/

The Games Dev

KaosSpectrum

Adding a custom Gameplay Debugger Page

#

oh you on about enabling vislog

#

yeah i test in debug game, vislog can run in debug game

#

my bad 😄

slow bobcat Dec 8, 2019, 12:20 PM

#

@pine steeple when you say "can run in debug game" do you mean "I run the game in Debug Game No Editor and I can record with vislog"? out of the box? because I had to manually add the module etc

slow bobcat Dec 8, 2019, 12:38 PM

#

@fallow hound
from my experience:

never tie AI logic to animations (if possible, sometimes it's unavoidable). Your ai should behave no matter the state of the anims
For shooting (doesn't matter the game genre) you should consider:
- accuracy: there are several ways to control it. It could be a random number (xcom does this) or controlled by the weapon spread. If you do weapon spread, consider to have a wide spread that becomes more accurate during time (i.e: if your npc uses a machine gun, the first bullets are very spread but, the longer it shoots, the more accurate they gor)
- prediction: you should consider the possibility of your ai being smart like a human and predict. Imagine the player running in a straight line from left to right. if your ai fires to your location, it might always miss unless you use a instant impact weapon. i.e: machine gun? it's fine. A mortar? you will always miss the shot due the traveling time of the projectile.
- orientation/aiming: this plays along with the prediction. ask yourself this: does AI rotate/follow the target when aiming? it's usually an easy thing to use for balancing a rotation/follow speed when firing. A cool AI will follow the target with the scope at the target velocity but, when firing, it will follow slower. you can create cool scenarios where the player runs and the bullets hit just behind, like in an action movie. If the player stops (and probably the first bullet), it gets damaged.

#

What does it mean "AI can see the player"? does your AI use the capsule? bones? do you support things like "I see the player through a crack in the wall? Usually is a good technique to have few bones that you check against. Sometimes a player might be hiding behind a column with an arm sticking out. This can be tricky to balance depending on what the player sees, it can be very unfair sometimes. It's a good thing to say "I need to clearly see at least 3 bones to shoot".
- Firing special conditions: like critical hits, headshot etc. This usually depends a lot on the previous point (as in "which bone am I targeting? was the hit close enough? did I roll a good number for probability of critical hit?)
- Reload/cooldown: mandatory. extra points if you show an animation/a cue etc
- Awarenes: "tell" the target that it's now a target. "Hey! it's over there!" "I'm going to rip you a new hole!" and those kind of things (Uncharted/Tomb raider are very good examples)
- How to engage: look for cover or an optimal shooting point etc.

Obviously all this depends a lot on how your gameplay is and you don't need all of them, but keep them in mind.

#

extras (we talked about this):

target selection/swapping based on weights and how much of a threat they are to the AI agent
AI spread of awareness: "It's over there!" "follow me!". Create a danger out of AI teaming up (up to you if that's actually dangerous for the player)

fallow hound Dec 8, 2019, 12:41 PM

#

Excellent, thank you!

#

To make sure an NPC is actually aiming at a player, I'm thinking I'll sit product the forward vector or the gun barrel to the direction vector between npc and player, and check if it's above a threshold

#

Is that how you've done it?

slow bobcat Dec 8, 2019, 12:43 PM

#

about bones and Unreal: use sockets. You can't guarantee that all your targets will share the same skeleton. If you use GetSocketLocation(), the engine will give you one of the 3:

the socket location if found
if not, will look for a bone with that name and return the location
if all fails, it will return the skeletal mesh component location.

If you use something that is not unreal, keep in mind that you can have virtual bones (it's the same concept)

#

forward vector or the gun barrel
that gave me headaches in the past due animations moving the gun when running+shooting. If you do that, my advice is this:

have a scene component in the character that aligns with the gun as much as possible but that doesn't move with animations
use that scene component as line trace origin for your aiming
then add parameters you need (spread, height of the target location etc)

#

also, this falls into "don't tie your ai to animations". You might have shitty anims or a T pose for ages and that shouldn't stop your work

#

lastly, my advice (applies to other areas):

spend as much time as needed in good debug tools.
make a simple map and a simple spawner to test your AI features (basic setup for combat, covers etc)
expose as many parameters as you can so you can iterate fast
don't assume things like "yeah, my target is an enemy actor". You might want your ai to target explosive barrels next to the player to inflict as much damage types as possible. Or a flying drone. Or an automatic turret. Treat them as targets (AActor if you use unreal). things will take more time, but the reward of flexibility makes it worth it

granite robin Dec 8, 2019, 2:54 PM

#

I have a sort of "backend" AI that needs to physically traverse a surface; once it has completed or reached a certain point, other events will fire. I've been reading about navigation but since this is 95% backend (i.e., the user will NOT see the traversal process) I'd like to create an override event that simply teleports the actor to the next point, if a certain amount of time has reached (i.e. they got stuck or the result of MoveTo is failure (or success in some cases)

Would this simply be a function that takes in the actual distance between the next target point and the AI, then uses the AI's move speed to calculate the time it should take and use that amount to evaluate if the AI has taken too long, simply teleport them to next point and initiate a new MoveTo command and restart the timer/distance?

patent hornet Dec 8, 2019, 3:01 PM

#

you can get path length from a pathfinding query

#

(pathlength - tolerance) / speed to get the time to reach the point

granite robin Dec 8, 2019, 3:20 PM

#

That's exposed to blueprint right?

fallow hound Dec 8, 2019, 4:00 PM

#

@slow bobcat Thanks so much, saving all of this in a doc, I will likely repeatedly refer to it as I develop my AI.

hollow osprey Dec 8, 2019, 6:07 PM

#

I Created a BP class derived from AI controller and added a perception component to it but from some reason the AI controller doesn't see it.
I debugged AIController.cpp::PostRegisterAllComponents, where it's looking for the component PerceptionComponent = FindComponentByClass<UAIPerceptionComponent>();, but at that point in time the component list doesn't contain it.

#

Any ideas?

patent hornet Dec 8, 2019, 6:44 PM

#

try PostInitializeComponents

#

for that one im sure it happens after all BP components are ready

hollow osprey Dec 8, 2019, 6:56 PM

#

.. you're saying it like it's my code. That's epic code

obsidian wolf Dec 8, 2019, 7:22 PM

#

I've created an AI which follows the character, using the behavior tree. Everything is working perfect, until I add another AI. After that, I think one blackboard key is overwriting the key for the other AI. So, if all AI sees me, it follows me. If one of them doesn't see me, both of them will not follow me anymore. So,in conclusion, I can't use the same AIController and BT for multiple NPCs? Because I'll have for about 20 AIs / scene.

📎 AI.png

#

📎 BT.png

fallow hound Dec 8, 2019, 7:47 PM

#

Did you check instanced for the key? That makes it shared

obsidian wolf Dec 8, 2019, 7:53 PM

#

Just checked instanced for AICanSee key. Now all the AI sees me if one of them will see me.

pine steeple Dec 8, 2019, 8:19 PM

#

you cant use the same AI Controller

#

for all ai unless you want them to have the same attacktarget/behaviour

#

you can use the same tree, for different ai

obsidian wolf Dec 8, 2019, 8:24 PM

#

So if I have 20 AIs, I need also 20 AIControllers? Also all my AIs are inherited from a parent.

pine steeple Dec 8, 2019, 8:38 PM

#

thats how it works yes

#

unless you want them all to respond the same

#

which is not what you want

obsidian wolf Dec 8, 2019, 8:43 PM

#

Still not working. Created two AIControllers for two NPCs and still behave the same. If one sees me, the other one comes from the corner also to attack

slow bobcat Dec 8, 2019, 8:52 PM

#

So if I have 20 AIs, I need also 20 AIControllers
unless you want them all to respond the same

I would put a big depends on this.
I have several enemy types, completely different behaviours. I only have one controller with components for managing different things.
It all depends how you do things.
In my case, I have a system where we define in the enemy bp a default engage behaviour that will run when approaching a target (we base our decision on the type of weapon).
Then, enemies can have special attacks, abilities and what not. We have an object that defines how they should engage (pointer to a BT), what to do, conditions etc.
when the main BT (same for all the enemies) decides "now you should engage because you have a target", we decide what to do and we inject dynamically the right BT.

I honestly don't see the point of having more than one AI controller for a type of AI.

#

the AI controller (to me at least) is just a piece of code to manage the info (perception system, what to do with your weapon and process its information, what other attacks/abilities do you have and when/how use them. Interaction with the brain (behaviours) and that kind of thing. Then it will send the relevant parts to the behaviour tree and it's the behaviour the one that should decide what to do. (flee, attack, help, patrol...)

#

Also our AI controller sends info to other parts of the enemy, like to the enemy actor, the health component etc.

obsidian wolf Dec 8, 2019, 9:03 PM

#

Thank you for detailed info

slow bobcat Dec 8, 2019, 9:03 PM

#

example:
Melee enemy has a melee engage default behavior. This is "follow target and, when close enough, attack". We also have parameters to control things like "you can move while attacking or not"
Range enemy has a range engage default behaviour. With parameters exposed we also control "move while attacking" or not, keep minimum distance, look for cover etc. This parameters are then used in the BT.
Then, we have a Melee Attack BT and a Range Attack BT. The melee engage BT has a node to run the Melee Attack BT and the Range Engage BT has a node to run the Range Attack BT.
In the attack BT there's a node "Attack" which is calling attack in the AI controller. In that function, and using the info processed, the AI controller checks the weapon, how it works etc and does the attack. you change the weapon? no problem, the BT is exactly the same, no need to change it. the AI controller will do the right thing.

We can change this anytime we want. For example, we can have a ranged enemy to use a knife. It will replace the Range Engage BT for a Melee Engage BT at runtime, that will then run. The ranged will behave like a melee. When it's done, we revert back to the defualt behaviour.

No need for more than one AI controller

#

AI controller process info and modifies the bt if needed.
the bt decides when to do things.

I'm very curious how you guys do things and why you use different ai controllers
the only thing I can think is perception configuration, but you can always do a child BP of the ai controller, change the parameters and assign it to the npc.

obsidian wolf Dec 8, 2019, 9:06 PM

#

My problem is that, if I'm face to face with one enemie and in the meantime another enemie will not see me anymore (CanSeeMe key will be false), the enemy which I'm face to face will not see me anymore also. Will start patroling like I'm not there

#

So what I think is that one NPC will overwrite BT key to another NPC

simple crest Dec 8, 2019, 9:06 PM

#

Did you or did you not turn on the Instance Syncd option for your BB keys?

slow bobcat Dec 8, 2019, 9:07 PM

#

But that's super weird. Unless you have static variables for it, each npc uses its own instance of Ai Controller (and components), Behaviour tree and Black Board.

#

You have to manually make all that static for that to happen (if that's what it's actually happening)

obsidian wolf Dec 8, 2019, 9:08 PM

#

Yes, I've checked Instance Synced for all keys

simple crest Dec 8, 2019, 9:08 PM

#

Then you must not have clearly read about what that does alex

slow bobcat Dec 8, 2019, 9:11 PM

#

isn't that to make the BB keys to behave like if they were static variables? as in "same value for every instance of the BB"?

obsidian wolf Dec 8, 2019, 9:12 PM

#

Well, I don't want that. I want like each NPC to work like it has it's own BT

#

When I add only one NPC in the map, it's working great

#

If I add two of them is going crazy

slow bobcat Dec 8, 2019, 9:13 PM

#

yeah, what I mean is that Instace Sync should be off

obsidian wolf Dec 8, 2019, 9:13 PM

#

Were off. Turned on after here told me

slow bobcat Dec 8, 2019, 9:14 PM

#

humm.
So, my only suggestion would be to track down every place where you modify that variable and see what's going on. Place a breakpoint and print info about it.

simple crest Dec 8, 2019, 9:14 PM

#

No he told you to make sure it wasn't on, you just misunderstood it's ok.

#

I wasn't sure about what was said, so I asked about it again.

obsidian wolf Dec 8, 2019, 9:15 PM

#

📎 1234.png

#

📎 123.png

#

This is the only place I change the CanSee bool

slow bobcat Dec 8, 2019, 9:17 PM

#

Print who/when that gets called. Also, I recommend you to use Black Board Key Selectors to get/set values in the BB instead of the name thing you're doing.
EDIT: not sure now if you can use them anywhere but Decorators/Services/Tasks

obsidian wolf Dec 8, 2019, 9:33 PM

#

All my enemies are children from a parent. Can this be the problem? They share one key from parent? So if one key is true, all the children will have the same value?\

pine steeple Dec 8, 2019, 10:21 PM

#

How can you posses multiple pawns with the same ai controller ?

#

Cause a single controller can only possess one pawn

#

@slow bobcat

slow bobcat Dec 8, 2019, 11:15 PM

#

every instance of an actor that has an ai controller set gets an instance of the ai controller. The engine creates one per actor

pine steeple Dec 8, 2019, 11:24 PM

#

you said you use the same ai controller?

#

i was on about instances, not classes

slow bobcat Dec 8, 2019, 11:25 PM

#

same ai controller class sorry.

#

my bad

#

I have one ai controller class and one ai controller bp that inherits from said class

pine steeple Dec 8, 2019, 11:26 PM

#

yeah

#

i have multiple but its more for setting defaults (aggro system defaults) for specific monster groups

#

but all derive from a base controller

slow bobcat Dec 8, 2019, 11:27 PM

#

riiight ok ok. now I understand. then we have a very similar approach

lyric flint Dec 9, 2019, 3:18 AM

#

Anyone interested in helping me get my ai to follow the player?

#

im having trouble

keen furnace Dec 9, 2019, 3:18 AM

#

Check out Peter newton's channel

#

He has tutorials for that kinda thing

lyric flint Dec 9, 2019, 3:19 AM

#

i have eeverything set up

#

diferently

keen furnace Dec 9, 2019, 3:19 AM

#

Show what you have

#

You are more likely to get effective help from that than you are finding someone who will fix it all privately for free

#

Screenshot your tree to start with

lyric flint Dec 9, 2019, 3:21 AM

#

free and privately? this isnt a discord where we get help?

keen furnace Dec 9, 2019, 3:23 AM

#

I meant, you were just asking for help to fix your AI without detailing what steps you had taken in a manner that people viewing this thread can assist with

#

You are more likely to get help from doing that than you are just asking for help with no details

#

Show us what you have so far

lyric flint Dec 9, 2019, 3:49 AM

#

all im trying to do is get him to move to character and shoott

#

📎 unknown.png

simple crest Dec 9, 2019, 4:27 AM

#

are you aware PawnSensing is about half a decade obsolete?

#

also https://sol.gfxile.net/dontask.html

keen furnace Dec 9, 2019, 4:38 AM

#

@lyric flint try this tut instead https://www.youtube.com/watch?v=nshHCycft4A

YouTube

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

lyric flint Dec 9, 2019, 4:40 AM

#

I got it to work. Now I just need help with him to wander.

#

To wander and fire only when he sees me

keen furnace Dec 9, 2019, 4:41 AM

#

random point in navigable radius -> move to

lyric flint Dec 9, 2019, 4:41 AM

#

BTW I'm not using tree no more.

#

I'm putting it all in the enemy for the time being

keen furnace Dec 9, 2019, 4:42 AM

#

set a looping timer on beginplay. make that lead to a branch with onattack behavior, and wander behavior. set that bool on agro

#

for wander, random point in navigable radius -> move to

carmine light Dec 9, 2019, 1:29 PM

#

Hi everyone! My AI is bugging out when they have to turn to go upstairs. Suddenly they stop walking. I'm not sure why, but could it be that they are getting outside the nav mesh? Thanks 🙂

📎 2e1418b1c84ee6c578181b6a60df0fe2.png

fallow hound Dec 9, 2019, 2:45 PM

#

I could make sure the step up distance is high enough in their character movement comp @carmine light

obsidian wolf Dec 9, 2019, 6:50 PM

#

How can I know if a task not succeded and reset the BT? The AI can see me but I'm at higher ground and he can't reach me. Also, after I'm out of his sight, I've made a tree to check my last position and because I'm at higher ground and the NPC can't reach that location and it's blocked at Move To task. The idea is to check the last seen location and after it's checked to go to a random location, but now it's locked to Move To Last seen location

keen furnace Dec 9, 2019, 8:21 PM

#

make your own move to task that checks while running @obsidian wolf

supple sky Dec 9, 2019, 10:54 PM

#

How do I AND multiple blackboard decorators?

patent hornet Dec 9, 2019, 10:56 PM

#

composite, but you don't really need to, as all of them need to pass for task/node behind them to execute

#

effectively already giving you the effect of AND

supple sky Dec 9, 2019, 10:57 PM

#

Weird...I thought I was getting an OR.

last elm Dec 9, 2019, 11:47 PM

#

[QUESTION] Is there a way to view the "Path" or retrieve the location points so I can ultimately display the path from an AI move to location node? It looks like there is but I'm missing something.

#

I found an answer possibly - yet to test it, though it seems plausible.

#

📎 PathPoints.PNG

slow bobcat Dec 10, 2019, 7:54 AM

#

there's this FGameplayDebuggerCategory_AI::DrawData but I don't think it's used right now

slow bobcat Dec 10, 2019, 2:43 PM

#

Question: when the navmesh is in Red, it usually means that there's a nav block in it right? could it show in red for any other reason? I'm having a bug with it and I don't understand why. The only clue I have so far is that it changes from green to red now and then, but no idea why.
Suggestions anyone?
Cheers

patent hornet Dec 10, 2019, 2:47 PM

#

red is either not built, or has a nav modifier on it that colors in red

slow bobcat Dec 10, 2019, 2:50 PM

#

I see. I don't think the designers put any modifiers there, but will double check. Let's assume they didn't and it's the other option (not build). Explanation for it to flash between green and red?

#

ok, I think someone enabled Can Affect Navigation on some npc. Will dig deeper.
Thanks for thehelp @patent hornet !

vocal sinew Dec 10, 2019, 3:00 PM

#

Guys, I place a nav link so AI can "walk" over this antigrav field. But navproxy cannot link these points. How to fix it?

📎 unknown.png

upbeat steeple Dec 10, 2019, 3:01 PM

#

Hey everyone, how can I get a notify when pawn is out of sight (using PawnSensingComponent). I only have an event for SeePawn, and I'd need one for "OnEndSePawn". Thanks!

fallow hound Dec 10, 2019, 3:14 PM

#

Is it possible to change the task run by a simple paralell at runtime?

slow bobcat Dec 10, 2019, 4:13 PM

#

AFAIK the only thing you can change in the tree at runtime are the dynamic BT execution nodes

fallow hound Dec 10, 2019, 5:57 PM

#

Hmmm, I wonder if the simple paralell would accept a dynamic bt that was composed of 1 node

#

I'm thinking of ways for the NPCs to select different types of shooting while they are doing other tasks.

#

I could do it in a service, but I think services are only supposed to populate bb not cause actions

supple sky Dec 10, 2019, 6:27 PM

#

I want to make a path (inside my navmesh) for my so to patrol. I want it to have a width so they don't just move from point to point. And I would like it to use the so pathfinding. Can I create a sub-navmesh? And only use that until it sees the player?

vale berry Dec 10, 2019, 8:05 PM

#

No, you'd use modifier volumes

supple sky Dec 10, 2019, 8:16 PM

#

Modifier volumes...looking them up.

#

Thank you!

vale berry Dec 10, 2019, 8:22 PM

#

I think that's what you're looking for. When you patrol you're always moving from point to point.

slow bobcat Dec 10, 2019, 8:51 PM

#

is there a way to speed up the update of the perception system? we're experiencing a "bug" where it takes very long to register targets. Specially when there're several agents using it

vale berry Dec 10, 2019, 9:01 PM

#

setting max age to something other than 0 might help

slow bobcat Dec 11, 2019, 7:13 AM

#

the thing is that, what takes very long, is the first time to detect

#

but will try

slow bobcat Dec 11, 2019, 8:01 AM

#

nah, that doens't fix it. I will have to dig and find the variable the use for the time slice in the perception component and see what's going on

half vessel Dec 11, 2019, 9:41 AM

#

I'm having a hard time to understand how to get a EQS result when in Run Mode: All Matching. Shouldn't it output a array?

#

how do I access it?

fallow hound Dec 11, 2019, 1:41 PM

#

Can I run multiple BTs at once? eg one for movement and one for shooting?

hoary peak Dec 11, 2019, 1:56 PM

#

I think you should run a simple parallel in that case

fallow hound Dec 11, 2019, 3:12 PM

#

Simple paralell only supports a single task unfortunately

#

I'd like 2 instances of BT logic running

hoary peak Dec 11, 2019, 7:32 PM

#

Well you could hook in a sequence or selector as well

#

Put a Service on there and you have a "local subtree", not as readable as having it in another BT but it would most likely work, I haven't tried it myself

fallow hound Dec 11, 2019, 8:21 PM

#

Hmm, I don't think you can have composite nodes on both sides of a simple parallel

#

You get one task, and one subtree

pastel hare Dec 12, 2019, 11:09 AM

#

I'm using "Move To" task in the behavior tree. How can I make them swarm the player rather than stack on top of each other?

📎 AI.png

fallow hound Dec 12, 2019, 11:12 AM

#

there are a couple of crowd avoidance solutions in UE4, one is RVO, I can

#

't remember the other

#

but that might not help here, you might need to solve it on your own. eg assign each NPC an angle to approach from.

pastel hare Dec 12, 2019, 11:15 AM

#

ok, thanks

pastel hare Dec 12, 2019, 11:35 AM

#

using UCrowdFollowingComponent did improve it a bit

last elm Dec 12, 2019, 4:04 PM

#

[QUESTION] Having trouble path finding to any location synchronously besides the starting path point. I'm using 4.23.1 and blueprints. Any ideas?
Added Edit: Just finished testing in 4.24.0 and the path is still not seen there.

📎 UE4.23.1_PaathFindLocationSync.PNG

hollow osprey Dec 12, 2019, 4:43 PM

#

I'm trying to make my npc perception use hearing, and it doesn't seem to work.
I'm trying to debug it, but the debug view only show sight.
Is it a bug or am I doing something wrong?

hollow osprey Dec 12, 2019, 5:23 PM

#

nvm, after a lot of debugging of internal serialization I found out it was a corrupted component. Recreated it and it works 😐

wide mirage Dec 12, 2019, 9:24 PM

#

@pastel hare You could have the AI randomly move to different locations relative to their own in a certain radius, while they follow you

hollow vapor Dec 13, 2019, 6:58 PM

#

So how do I get ai to follow me to the next level? My character will go to the next level but I have Ai that follow me and I cant get them to follow me to the next level and on top of that when I come back in the level is reset...meaning all the ai is back in its normal position.

patent hornet Dec 13, 2019, 7:01 PM

#

SeamlessTravel

#

can mark actors to persist through level transiton

hollow vapor Dec 13, 2019, 7:05 PM

#

@patent hornet Thanks I will look that up as I was not able to find anything on it....how about the level ?

patent hornet Dec 13, 2019, 7:05 PM

#

you mark seamless travel boolean true in GameMode

#

and you transition level via ServerTravel

#

you'll have to add the AI in question to seamlesstravelactorlist

#

and it should travel with you

hollow vapor Dec 13, 2019, 7:06 PM

#

Do you have any tuts you would suggest?

#

I apparently did not finish my question above....how do I fix the level from reseting when I exit and re/enter the the level?

pine steeple Dec 13, 2019, 8:13 PM

#

you cant

#

the level is cleaned up when you leave

#

created when you enter

vast sphinx Dec 13, 2019, 8:16 PM

#

why won't the editor respect the nav mesh settings for Force rebuild on Load and Use as Main Nav data?

#

it's a main editor setting, aieyeiyei

#

📎 unknown.png

#

it just randomly toggles, let alone if you close and reload the editor

hollow vapor Dec 13, 2019, 8:22 PM

#

@pine steeple oh wow...ok so the only way to do it is seamless travel?

patent hornet Dec 13, 2019, 8:27 PM

#

that, or not actually changing the level

#

but instead hiding/unhiding sublevels and teleporting around instead of level transition

simple crest Dec 13, 2019, 8:28 PM

#

or build an entire system that can serialize/save your entire level state and reload it when you return

pine steeple Dec 13, 2019, 8:42 PM

#

or level inside level

#

like COD Zombies

#

if they teleported you, they never changed level

#

instead repositioned you on the current level

#

in a complete different positions

#

so it looks like its a new map, when infact its just an off screen hidden area

hollow vapor Dec 13, 2019, 8:49 PM

#

Hmmm...lots to think about ...I just finally attached a level today and realized that the ai dont follow and the level resets. What would be the best method here out of my choices?

vast sphinx Dec 13, 2019, 9:16 PM

#

I had to spawn some things as AI instead of actors, then they would persist across loading and unloading streaming levels, not sure if that answers your question

desert cipher Dec 14, 2019, 11:39 AM

#

I just noticed my AI sense damage isn't working.

#

I've enabled sight, hearing and damage on my AI controller. I started printing which sense is reporting stimulus, and damage never reports, even for Ai which are outside sight/hearing range and I'm damaging.

#

is there a specific way damage has to be applied to trigger it?

#

I get notifications for both hearing and sight.

📎 sense.png

#

Do I need to use the report damage event?

pine steeple Dec 14, 2019, 12:19 PM

#

yes how would the ai system know?

#

not sure if the standard Actor take damage reports damage events (iirc they don't)

desert cipher Dec 14, 2019, 12:43 PM

#

That's what I wondered. I wondered if the take damage would actually report that or not.

#

I think I missed that in the game I previously made with Ai perception because my projectiles also made noise. So since they made noise, that triggered instead of damage

lyric flint Dec 14, 2019, 4:12 PM

#

i have a problem with my capsule collider on my enemy.

#

on my weapons they check if they are hitting my enemy and the enemies capsule collider automatically detects it and causes damage

#

but my enemy has a trigger box to detects the players near him and if i am in ther trigger. i cant seem to shoot at the capsule collider. but if i am out i can

#

📎 unknown.png

#

is there a way to allow me to shoot at the capsule collider so i can cause damage?

fallow hound Dec 14, 2019, 4:18 PM

#

read through the docs on collision channels

#

essentially, you need to know what kind of trace you are using for shooting

#

and make sure your box trigger is set to ignore that trace

#

@lyric flint

lyric flint Dec 14, 2019, 4:36 PM

#

@fallow hound im using projectiles

#

actual bullet

#

im not doing any line tracing.

#

i tried looking on unreal and i cant find what im looking for to help. mostly because i dont know much

fallow hound Dec 14, 2019, 4:38 PM

#

still look into collision channels

#

you can have the projectiles ignore the box

lyric flint Dec 14, 2019, 4:46 PM

#

ok

lyric flint Dec 14, 2019, 6:09 PM

#

im having a hard time trying to shoot at my enemies collider when inside their trigger box. is anyone able to help me?

lyric flint Dec 14, 2019, 6:52 PM

#

📎 unknown.png

#

i set up sum thing in the collision channel

#

and even tho i told the trigger box to ignore the the projectile, it wont hit the capsule.

#

how do you even know that the name of my collision channel is connected to my bullet?

fallow hound Dec 14, 2019, 7:05 PM

#

is your bullet a BP?

#

config its collision there

lyric flint Dec 14, 2019, 7:09 PM

#

@fallow hound my bullet is a blue print

#

what is config?

fallow hound Dec 14, 2019, 7:09 PM

#

sorry configure its collision, just a phrase

#

so the bullet is made of components

#

figure out which is responsible for colliding

#

prob the static mesh?

#

find its collision info

#

make sure its set up right

lyric flint Dec 14, 2019, 7:10 PM

#

idk how to set it up liok that

fallow hound Dec 14, 2019, 7:10 PM

#

same way you did for trigger box

lyric flint Dec 14, 2019, 7:11 PM

#

trigger box just checks if the player detected

#

thats all i know how to do is detect the player. not the actual capsul

#

and whats the point of creating an object channel if it doesnt know hwat object its supposed to be using. its empty

#

📎 unknown.png

fallow hound Dec 14, 2019, 7:12 PM

#

thats what im trying to tell you how to do

#

you open the projectile bp

#

tell the projectile ot use that channel

lyric flint Dec 14, 2019, 7:14 PM

#

how do i tell it to use the channel

#

?

fallow hound Dec 14, 2019, 7:15 PM

#

find "collision presets"

lyric flint Dec 14, 2019, 7:16 PM

#

yes

#

what do to the presets?

fallow hound Dec 14, 2019, 7:19 PM

#

send a screen

lyric flint Dec 14, 2019, 7:21 PM

#

ok

#

📎 unknown.png

fallow hound Dec 14, 2019, 7:22 PM

#

ok so, your trigger box is object type "world dynamic"

#

do you can check ignore next to world dynamic

#

and it should ignore the box

#

hopefully your capsule isn't work dynamic too

#

see where it says "object type"? that is the type of object it is

#

looks like it is projectile already

lyric flint Dec 14, 2019, 7:29 PM

#

i dont understand why i am ignoring world dynamic

#

and also

#

i cant deal damage

#

im supposed to deal damage, my goal is to deal damage when im inside the trigger

#

because originally the trigger was never there

#

and the bullet only deals damage when it detects the player, so it chooses the capsule collider

#

but since the trigger was added for other reason, now when im outside the trigger box, it deals damage

#

but when im in it, it doesn

#

and i need my bullet to deal damage when it deteects the player, aka the capsule

#

@fallow hound not only that, the trigger doesnt work now. so im confused as to how this helps atm

fallow hound Dec 14, 2019, 7:35 PM

#

ah, sorry, seems that wasnt the answer 😦

#

i am stumped then

lyric flint Dec 14, 2019, 7:36 PM

#

do you know anyone who can help?

#

anyone here who can help?

fallow hound Dec 14, 2019, 7:36 PM

#

No, but this does seem more like a physics question than ai

lyric flint Dec 14, 2019, 7:37 PM

#

its not physics tho

#

im not using physics

fallow hound Dec 14, 2019, 7:37 PM

#

Ah, okay then

lyric flint Dec 14, 2019, 7:38 PM

#

any senior designers here to help me?

vast sphinx Dec 14, 2019, 7:48 PM

#

any tricks to generating Nav Mesh in the right order or something? trying to stream levels and it keeps using the nav mesh from a previous level or something stupid

vast sphinx Dec 14, 2019, 8:06 PM

#

are they ... just not supposed to overlap or wtf?

lyric flint Dec 14, 2019, 8:19 PM

#

how do i get my ai to use on see pawn every frame?

#

i want them to go back to wander when they dont see pawn, and on see pawn works like on begin play

hollow osprey Dec 14, 2019, 8:47 PM

#

how can I disable a perception component in runtime?

#

@lyric flint using perception?

hybrid quarry Dec 14, 2019, 8:53 PM

#

How do I make a vehicle move when using AI?

#

I followed this tutorial: https://www.youtube.com/watch?v=tq-ULFuNyig

YouTube

Tom Looman

Unreal Engine AI Tutorial: Create AI with Behavior Trees

Please note: This video is part of a larger series, but you can easily watch this video by itself and learn about behavior trees without requiring the earlier videos! Skip to 3:37 for the Behavior Tree Section.

Join me in this step-by-step tutorial on using behavior trees to...

▶ Play video

lyric flint Dec 14, 2019, 9:00 PM

#

@hollow osprey hey

#

yea

#

rn i have perception updated to work

#

but the thing is. he only fires when he is finished walking to their last wander point

#

how do i get them to fire as soon as they see the player and not finish wandering?

hollow osprey Dec 14, 2019, 9:05 PM

#

I'm not sure how you're BT is set, but the moving should be evaluated each frame, so assuming a detection node is before that it should be evaluated first once it's available

lyric flint Dec 14, 2019, 9:18 PM

#

i got it

#

but theres a problem with my move to... he moves to the firest point and doesnt go to the second

#

📎 unknown.png

#

📎 unknown.png

#

the last picture is the move to locations

#

im using 3d vectors i can place in the world, coming from the enemy, and hes supposed to walk to them

#

but rn he only goes to one

#

📎 unknown.png

simple crest Dec 14, 2019, 10:49 PM

#

just btw, you said "on see pawn" and you have "pawn sensing component" on your actor, and you also have ai perception component on it

#

(i can't help you but this might confuse other people who are)

pine steeple Dec 15, 2019, 4:14 AM

#

also you are confusing sequence with selectors

#

that selector node is on the left is going to do the first task, then exit.

lyric flint Dec 15, 2019, 2:08 PM

#

right now im using a task blueprint to get my player to wander and he wont wonder and i dont know why

#

📎 unknown.png

#

📎 unknown.png

#

📎 unknown.png

#

i have everything set up right

#

when i play he wont move

📎 unknown.png

#

something is causing my enemy to not move

patent hornet Dec 15, 2019, 2:23 PM

#

odds are you never called FinishExecute in PatrolTask

#

so its still doing it

lyric flint Dec 15, 2019, 2:26 PM

#

IT IS

#

@patent hornet HEY

#

caps

#

i called everything perfectly

#

i even did a task to always print hello and it worked

#

so im unsure to why i cant move then ?

patent hornet Dec 15, 2019, 2:27 PM

#

that BT screenshot implies it never goes into MoveTo task

lyric flint Dec 15, 2019, 2:28 PM

#

where in the blueprint tree does it say it never goes in to move?

#

the picture in the very top is the task blueprint for patrol

#

its set to true at the end

#

im so stressed because literally everything set up right, i\

patent hornet Dec 15, 2019, 2:29 PM

#

if your BT enters MoveTo

#

use VisualLogger

#

to debug

lyric flint Dec 15, 2019, 2:30 PM

#

whats visual logger/

#

how do i get that

patent hornet Dec 15, 2019, 2:30 PM

#

it has decent documentation, and it would be a lot of typing

#

its integrated in UE, records what the controllers are doing, making snapshots of their actions, blackboard, pawns etc...

#

it also has quite extensive logging

lyric flint Dec 15, 2019, 2:31 PM

#

ill see if i can find it ig\

patent hornet Dec 15, 2019, 2:31 PM

#

its windows>Devtools>visual logger to start it

#

or vislog in console

lyric flint Dec 15, 2019, 2:32 PM

#

so i press record before i play game

patent hornet Dec 15, 2019, 2:32 PM

#

you can start/stop recording at any time

#

depends on what you're debugging

#

if that AI tries to move right away, then yes

lyric flint Dec 15, 2019, 2:33 PM

#

one sec

#

i dont even know wat im looking at

patent hornet Dec 15, 2019, 2:34 PM

#

you have one row per controller

#

you have those blocks arranged horizontally

#

its snapshots it took over time

lyric flint Dec 15, 2019, 2:34 PM

#

i think i see it

#

📎 unknown.png

#

blue means its good?

patent hornet Dec 15, 2019, 2:35 PM

#

well, that controller doesn't have a BT set

lyric flint Dec 15, 2019, 2:35 PM

#

weird

#

it does

#

otherwise it wouldnt shoot when i get in front

#

see

#

📎 unknown.png

#

📎 unknown.png

#

so unreal is broken ig?

#

any one willing to join in a discord call? i prtefer to show things that way. its less stressful on messages

lyric flint Dec 15, 2019, 3:09 PM

#

i think i found the problem

#

nvm its worse

#

i need help : (

simple crest Dec 15, 2019, 3:17 PM

#

Did you pay attention to const kaos's statement last night?

lyric flint Dec 15, 2019, 3:21 PM

#

yes

#

@simple crest did you see the work i have now in the pictures above

#

everything is different from last night and still wont work

#

even tho everything is set up right

#

i been spending hours on this. idk why it wont function right

simple crest Dec 15, 2019, 3:28 PM

#

So you have it set up for "enemy patrol" to output fail so that it can select move to and then that fails when it succeeds to it can select wait 0.3s?

lyric flint Dec 15, 2019, 3:29 PM

#

what

simple crest Dec 15, 2019, 3:29 PM

#

lenny

lyric flint Dec 15, 2019, 3:29 PM

#

this is what i have, ill show u

#

📎 unknown.png

#

📎 unknown.png

patent hornet Dec 15, 2019, 3:30 PM

#

oh lol

simple crest Dec 15, 2019, 3:30 PM

#

What does "enemy patrol" task do?

patent hornet Dec 15, 2019, 3:30 PM

#

selector returns true and finishes

#

when first child succeeds 😄

lyric flint Dec 15, 2019, 3:30 PM

#

inside player

📎 unknown.png

patent hornet Dec 15, 2019, 3:30 PM

#

you really want a sequence there @lyric flint

simple crest Dec 15, 2019, 3:31 PM

#

So the patrol task always succeed right?

lyric flint Dec 15, 2019, 3:31 PM

#

📎 unknown.png

simple crest Dec 15, 2019, 3:32 PM

#

So the selector node always selects the patrol task. Ask yourself how could it ever move on to the move task?

lyric flint Dec 15, 2019, 3:33 PM

#

hm

patent hornet Dec 15, 2019, 3:33 PM

#

📎 6.jpg

simple crest Dec 15, 2019, 3:33 PM

#

Go read the docs again on sequence and selector

lyric flint Dec 15, 2019, 3:33 PM

#

👀

#

ohhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

#

👀 i feeel stupid : (

#

i thought it was sequence

#

NOW IT WORKS! THANKS GUYS

#

I THOUGHT THEY WAS SEQUENCE

#

ok so um

#

🤔

#

wat happens if i want him to patrol to points

lyric flint Dec 15, 2019, 4:07 PM

#

i got it to work 😄

#

some how

lyric flint Dec 15, 2019, 4:42 PM

#

how do i check for tag instead of player?

#

📎 unknown.png

#

i want to find the player through a tag

#

like i tried using actor has tag

#

nvm got it to work

lyric flint Dec 15, 2019, 7:32 PM

#

ok um

#

im having trouble trying to tell my ai to find the player with tag and then look directly at them and follow them

#

this wat i have, but as you can see, i dont want to cast, i want to use tag

📎 unknown.png

simple crest Dec 15, 2019, 8:50 PM

#

You're still mixing new perception and old pawn sensing components BTW

#

Man. Like what are you doing 😄

📎 Screenshot_20191215-135828_Samsung_Internet.jpg

lyric flint Dec 15, 2019, 10:46 PM

#

@simple crest im a new to this

#

@simple crest could you help me with getting the enemy to detect the player through tags?

#

and looking at them and following them

fallow hound Dec 15, 2019, 11:07 PM

#

@lyric flint if you haven't seen it this is a great video on AI https://youtu.be/gH88ZKB1_IE

YouTube

Unreal Engine

AI: State of Mind | Live from HQ | Inside Unreal

The documentation team has been hard at work expanding and improving the documentation for AI. Wes Bunn will be in the studio to talk about these improvements and show us a sneak peak of what's coming!

ANNOUNCEMENT POST
https://forums.unrealengine.com/unreal-engine/events/16...

▶ Play video

simple crest Dec 15, 2019, 11:37 PM

#

Yeah. Stop what you're doing and go work through some tutorials, it sounds like you're trying to run before you learn to walk

lyric flint Dec 15, 2019, 11:49 PM

#

im doing assignment @simple crest

#

i just need help getting the ai to find player with tag and follow them

#

and the video doesnt show how

lyric flint Dec 16, 2019, 12:36 AM

#

ok i got it

#

now all i need is to get the player to properly rotate and look at the plyer without stuttering

lethal eagle Dec 16, 2019, 9:09 AM

#

hey all

#

I'm attempting to set a a player flipbook after a condition has been executed

#

but for some reason it only shows the first frame of the flipbook, then proceeds with the other blurprint nodes

#

Heres a vid, explaining the issue

📎 ue4Vid1.mp4

#

Oh dman jsut realized I'm on AI

craggy reef Dec 16, 2019, 10:04 AM

#

Hey folks, I'm using the Make Noise node to startle my AI when the player fires

#

I've noticed this seems to not work correctly if the player is on a plane above the AI however

#

as in, I can make all noise I want but they'll never react to it

#

I wonder what's up with that?

#

📎 unknown.png

#

if anyone has any clues, or want to know something else, ping me 🙏

#

I'm a dumbass

#

it does work, but the place where I was standing was not covered by the navmesh

orchid frigate Dec 16, 2019, 1:29 PM

#

hey guys,
someone experience issues with Move To node in BT? I worked with AI long time and never had an issue, but suddenly I feel like I have no control over the AI any more.

📎 unknown.png

#

Here is my navmesh

📎 unknown.png

#

And this is the bb during the game

📎 unknown.png

#

the BT Task to set the location if not set

📎 unknown.png

pine steeple Dec 16, 2019, 1:38 PM

#

@orchid frigate i have no clue what you are trying to do

#

but im assuming you want to change that selector on the left to sequence

#

then Task, then moveto

#

your task will not call move to if it fails, but will if its success

#

actually

#

looking at it again, http://www.interkaos.com/grabs/Discord_51HtkSWo8v.png

#

this needs to be a sequence

#

but that might return out if your decorator returns false

orchid frigate Dec 16, 2019, 1:43 PM

#

@pine steeple Well neither is working. Switching it to sequence causes that it gets stuck at root.

pine steeple Dec 16, 2019, 1:43 PM

#

do you really need to check if its set? as you are doing a higher level check if help is needed

#

make it simpler

#

after the helping selector

#

Sequence node

#

your two tasks

orchid frigate Dec 16, 2019, 1:44 PM

#

The issue is that Move to fails. Bcs instead of doing it it aborts directly and restart from the beginning.

pine steeple Dec 16, 2019, 1:45 PM

#

so you have a navmesh issue

#

moveto just aborting constantly

#

you familiar with visual logger?

orchid frigate Dec 16, 2019, 1:46 PM

#

Yes

pine steeple Dec 16, 2019, 1:47 PM

#

what does that report?

#

i mean i am pretty versed in behaviour trees

#

http://www.interkaos.com/grabs/gZR7XSoJRp.png <

#

lol

orchid frigate Dec 16, 2019, 1:47 PM

#

📎 unknown.png

pine steeple Dec 16, 2019, 1:48 PM

#

so yeah OnPath failed

#

meaning no valid path to target was found

#

can you show me your navmesh

#

oh nvm its in the above picture

#

can you bring up the gameplay debugger

orchid frigate Dec 16, 2019, 1:50 PM

#

Yes give me a moment.
the issue is I am not a newbie to Ai and made some more complex AI but thats why I wonder why this is the first project this is not working. 🤷‍♂️

pine steeple Dec 16, 2019, 1:50 PM

#

what is your teache

#

teacher*

#

ACharacter?

orchid frigate Dec 16, 2019, 1:50 PM

#

Yes

pine steeple Dec 16, 2019, 1:50 PM

#

hmm

#

can you show me the Nav settings on the cmc

#

normally i untick Update Nav Agen with Owner Params

#

and manually set Nav Agent Radius and Height

#

i have issues with it (then again i have 3 different navmeshes)

orchid frigate Dec 16, 2019, 1:52 PM

#

Alright give me a sec.

#

didnt change a thing in there

📎 unknown.png

pine steeple Dec 16, 2019, 1:53 PM

#

    {
        UE_CVLOG(Path.IsValid() == false, this, LogPathFollowing, Log, TEXT("Aborting move due to not having a valid path object"));
        OnPathFinished(EPathFollowingResult::Aborted, FPathFollowingResultFlags::InvalidPath);
        return;
    }```

#

see this is where chucks Invalid

#

but not sure why i dont see the above line

orchid frigate Dec 16, 2019, 1:55 PM

#

What settings ar eyou using for your AI?

#

regarding nav

pine steeple Dec 16, 2019, 1:56 PM

#

i just put 30 for radius

#

60 for height

#

and untick Update nav agent with owner

orchid frigate Dec 16, 2019, 1:56 PM

#

hm doesnt do a difference

pine steeple Dec 16, 2019, 1:57 PM

#

thing is, its returning Invalid for the move

#

that vlog line is this: UE_VLOG(GetOwner(), LogPathFollowing, Log, TEXT("OnPathFinished: %s"), *Result.ToString());

#

you using crowd following

#

or just normal path following comp

orchid frigate Dec 16, 2019, 1:58 PM

#

Just the standard set up

#

So the thing is

#

If I just let the vector blank and let send 0,0,0 it moves to this location

pine steeple Dec 16, 2019, 2:00 PM

#

the location its moving to is off navmesh right?

orchid frigate Dec 16, 2019, 2:00 PM

#

but as soon as I get the location of the requested actor, its not working

pine steeple Dec 16, 2019, 2:01 PM

#

have you tried moving to the actor

#

instead of to location?

orchid frigate Dec 16, 2019, 2:01 PM

#

yes I tried that same result

pine steeple Dec 16, 2019, 2:01 PM

#

so he moves on navmesh

#

just not to a offnavmesh locatin

#

show me your moveto node settings

orchid frigate Dec 16, 2019, 2:02 PM

#

wait let me try this thought, maybe I was silly enough to make the actors affect the nav mesh. this would make it impossible to move there

pine steeple Dec 16, 2019, 2:02 PM

#

i mean your actors are off navmesh

#

but partial move

#

should work

#

as long as the location is on navmesh (end point)

#

if endpoint is off navmesh, the path will be invalid

#

i normally circumvent this with a eqs query

#

or even a random point in navigable radius

orchid frigate Dec 16, 2019, 2:06 PM

#

🤦 I removed all meshes interfering with the navmesh and yes it works. so probably it wants to go to the exact location, will work around and get a navigable point in radius

#

I always prefer working with EQS but for that one I didnt want to spend time into eqs since it is just as simple as that

#

thanks for your help.

grand rune Dec 16, 2019, 4:05 PM

#

Hello everyone! My question is about navigation: if I make my navmesh bounds higher then some value it only generates it's data on that specific heght. Why is it so and how to fix it?

quartz urchin Dec 16, 2019, 10:04 PM

#

hey everyone. need some help with AI Perception sight sense. Is this possible to ignore (look through) some objects? In my case, it is a glass surface which is blocking visibility for AI.

graceful saffron Dec 16, 2019, 10:17 PM

#

Set the objects collision setting to ignore Visibility? Not sure how the AI traces but try that

olive pond Dec 16, 2019, 11:28 PM

#

Oh I had that problem too! Didn't know setting the glass' Visibility channel to ignore would make it see-through-able for AI vision perception. Cool.

I wound up creating my own vision system for AI though (with help from this discord channel) because when I would do seamless travel then sometimes (way more often on Android) the perception system would strangely stop working. And in my own system it had it trace in a way that ignores my force fields's custom collision channel. I'll probably want to set the force fields themselves to ignore visibility traces though.

wide mirage Dec 16, 2019, 11:32 PM

#

You could just create your own cone trace, It'll give you more control over certain aspects

olive pond Dec 16, 2019, 11:34 PM

#

That's what I ended up doing

#

And it seems to have fixed the problem with AI Perception shutting down randomly on seamless travel (because I'm not even using AI Perception haha)

#

Works great 🙂 And I have more control over how it works

#

Thanks to @patent hornet for the code to make the cone. I translated it into blueprint lol

wide mirage Dec 16, 2019, 11:44 PM

#

@lyric flint You don't have to use a BT for your AI

languid salmon Dec 17, 2019, 10:22 AM

#

Unsure if this is the right place to put this but:
Been having an issue with static meshes blocking navigation, apparently static meshes blocks navigation by default, and I can't seem to turn that off ? - How would I go about doing that ?

The actor itself isnt affecting navigation, just the static meshes.

patent hornet Dec 17, 2019, 10:26 AM

#

CanEverAffectNavigation on the mesh itself

languid salmon Dec 17, 2019, 10:27 AM

#

Seems like that function isnt available in blueprint ?
Guess I'll expose it in cpp

#

thanks

patent hornet Dec 17, 2019, 10:27 AM

#

its not a function

#

its a booloean

languid salmon Dec 17, 2019, 10:27 AM

#

well it def isnt showing

patent hornet Dec 17, 2019, 10:27 AM

#

type nav in CDO search

languid salmon Dec 17, 2019, 10:28 AM

#

:/

📎 unknown.png

patent hornet Dec 17, 2019, 10:31 AM

#

ah, spawned in runtime

languid salmon Dec 17, 2019, 10:32 AM

#

Well I did try without runtime, same thing unfortunately - will try with SetCanEverAFfectNavigation() from cpp - see if that works.

patent hornet Dec 17, 2019, 10:33 AM

#

if its a mesh the Actor's CDO then option is in class defaults

languid salmon Dec 17, 2019, 10:33 AM

#

Ah right yeh, well thats no good in this case unfortunately.

patent hornet Dec 17, 2019, 10:34 AM

#

the boolean should be on the UPrimitiveComponent

#

if you're going to dig through the source to find it

languid salmon Dec 17, 2019, 10:35 AM

#

UStaticMeshComponent has the function to set it atleast. So that should work

#

I hope xD

tough helm Dec 18, 2019, 1:28 PM

#

Hi
When I RunBehaviour in BT, my decorators in the outer tree ceases to be relevant and they unbind from observing BB keys.
Is there a way around this? I need to abort the RunBehaviour when decorator in the outer fails

limber aspen Dec 18, 2019, 4:22 PM

#

Hi, im working with crowd agents in 4.22, and my pawns are not moving at all with pathfing. However, deactivating it seems to make them move in straight line (not following the navmesh) The navmesh is correct, what can it be the problem?

📎 unknown.png

fallow hound Dec 18, 2019, 5:05 PM

#

@tough helm I don't think I get that behavior

#

I use run behavior dynamic though

#

Does your child tree use same bb as parent tree?

tough helm Dec 18, 2019, 5:07 PM

#

Same bb

#

Are you using cpp decorators or blueprint?

#

Cuz BP decorators have that fixed but they do that by ticking constantly which even engine sourcecode says shouldn't be used for production code

fallow hound Dec 18, 2019, 5:09 PM

#

I think I'm using both? Not at pc tho

#

Do epic made decorators fail too?

tough helm Dec 18, 2019, 5:09 PM

#

So BP decorators check if you used the condition function and if yes they check in tick and abort when needed

#

Cpp only chek on bb change

#

Not sure TBH

fallow hound Dec 18, 2019, 5:11 PM

#

I would see how epic coded their decorators

lyric flint Dec 20, 2019, 8:31 AM

#

@fallow hound There are some Tests in their source code here DRIVE:\Program Files\Epic Games\UE_4.24\Engine\Source\Developer\AITestSuite\Private\ , I found some interesting stuff there

#

replace the path with the drive letter and unreal engine version you are currently using

obsidian wolf Dec 20, 2019, 10:51 AM

#

Hello everybody! I'm having some problems when I'm spawning for example 5 AI inside a room. When the AIs will see me , they'll try to get out through the door but they are blocking each other the entrance. How can I solve this? They must get out each on a time through the door. Is a possibility to change the sphere collision smaller when they are close to a door? Or it's another way around

lyric flint Dec 20, 2019, 1:04 PM

#

@obsidian wolf maybe https://wiki.unrealengine.com/Unreal_Engine_AI_Tutorial_-_2_-_Avoidance helps?

Unreal Engine AI Tutorial - 2 - Avoidance

obsidian wolf Dec 20, 2019, 8:05 PM

#

Thank you, I'll check

carmine light Dec 21, 2019, 9:45 AM

#

Hi everyone! I really want to get started on unreal engine AI system. Could someone suggest me how to start? I've done my own basic AI, but I've never touched any blackboard or behavior trees. Anything helps. Thanks!

lyric flint Dec 21, 2019, 9:49 AM

#

@carmine light There are some tutorials on YouTube, and some courses on Udemy

#

If you enjoy C++, there is an AI test suite in the engine source as well

#

Personally I found a lot of goodies in the AI test suite 🙂

carmine light Dec 21, 2019, 10:40 AM

#

Going to try it. Thanks 🙂

bleak iron Dec 21, 2019, 11:23 AM

#

Hey has anyone ever tried to have a NavLink on a moving object? I can't seem to get it to work. Attached the NavLink Actor correctly but the Start-End points stay where they were

pine steeple Dec 21, 2019, 5:39 PM

#

not possible, unless you subclass the navlink and make it update every tick

#

which is super expensive

#

@bleak iron also please follow the rules and don't ask the same question in multiple channels

fallow hound Dec 21, 2019, 10:59 PM

#

Hm, updating a dynamic navmesh seems pretty performanct, what makes moving a navlink so expensive?

pine steeple Dec 22, 2019, 2:24 AM

#

if you need it to move with a moving object, then it will need to be updated every tick, if its just from one side to another, why not just have the navlinks pre-planted

#

but disabled

#

when platform/object isnt there

lyric flint Dec 22, 2019, 4:37 AM

#

So I recently upgraded my project to 4.24 and now I'm noticing navigation generation is completely broken

#

I typically use navigation invokers as I use very large levels, but I did attempt to change it back to static navigation and default ue4 values

#

If I try to build pathing as well, it performs the task instantly but no navigation data is ever generated

#

These are the settings I want to use as they worked in 4.22 perfectly

#

📎 unknown.png

#

📎 unknown.png

#

Also my AI are functioning properly, there is simply no nav data for them to use

#

Not sure if this is related to the issue but assets are failing to save after upgrade as well

#

📎 unknown.png

grim pine Dec 22, 2019, 12:47 PM

#

Ok - somewhere dumb question - but what was the console command to show naw-mesh while playing

bleak iron Dec 22, 2019, 1:13 PM

#

It's a ladder on a moving platform and would need to be updated every tick. Any idea how? I've attached the nav link to the platform but the start and end don't move. I can't find any blueprint nodes to update the start and end points either

#

@pine steeple

#

@grim pine Show Navmesh

pine steeple Dec 22, 2019, 2:01 PM

#

Wont be doable in BP only

#

Would need to do it in c++ or maybe a smart link actor can do It

lyric flint Dec 22, 2019, 5:42 PM

#

What is my issue considered? I'm very stuck at the moment

#

Everything works except navigation, but saving fails sometimes too

merry egret Dec 23, 2019, 7:33 AM

#

Help my ai blueprint crashes unreal when i open it in the editor and also crashes unreal when i press play

woven mural Dec 24, 2019, 7:46 AM

#

Is behavior tree require character movement component ?

hollow osprey Dec 24, 2019, 9:09 AM

#

nope. Even character isn't required for behavior tree; only pawn

#

@merry egret sounds like a corrupted asset. If you have version control use an older version. Otherwise I would delete the file from the FS and recreate it

dapper plank Dec 24, 2019, 6:44 PM

#

I am not sure if this has been asked before, so if it has please forgive me.

I have a large world with many levels (open world) that stream in/out. I am looking to add a navmesh and have found a bunch of forum posts online; however, they all seem to end up without a real answer on how to set it up so that the navmesh for each level streams in with the level. The half answer that I have found is to add a navmesh volume to the persistent world and then one to each level. Is this the way to go or are there better approaches?

I am basically looking to have the navmesh data for each level contained and loaded/streamed within that level.

EDIT: I am fine doing this in BP or C++ but would like to stay away from engine modifications if possible

errant maple Dec 24, 2019, 10:35 PM

#

So I've got a simple AI in BP and I'm trying to teleport it to a spot near the player. I'm getting a random point in the navmesh within 1000 units of the player and teleporting it there, but it instantly kills the AI from the level. I'm guessing it's falling out of the map or getting stuck in something, but I have no idea. Any suggestions?

fallow hound Dec 24, 2019, 11:58 PM

#

I think I add a big one to persistent world, enable dynamic navmesh, and put navmesh invoker's on the ai

#

Been a while tho

#

@dapper plank

#

Setting up navmesh usually takes some trial and error so don't get discouraged if you can't get it right away

lyric flint Dec 25, 2019, 12:09 AM

#

@errant maple I don't use blueprints, but in C++ I would probably try and bypass TakeDamage during the teleportation process.

worldly flame Dec 25, 2019, 12:15 AM

#

📎 unknown.png

#

how do i check if the actor in my perception is still in sight

lyric flint Dec 25, 2019, 12:18 AM

#

@worldly flame I don't know blueprints, but in C++ is Stimulus.IsActive()

#

if (Stimulus.IsActive()) { Do1(); } else { Do2(); }

worldly flame Dec 25, 2019, 12:21 AM

#

@lyric flint i mean if the AI is looking for me.... and i start hiding

#

he keeps shooting for me through the wall

#

i want the ai to back to finding a target if the target is lost

devout plume Dec 25, 2019, 12:26 AM

#

Not sure to understand your question but if you just want to have a boolean to tell if the guy is in the perception volume or not you can use this node

📎 unknown.png

#

Use the bool at the bottom

worldly flame Dec 25, 2019, 12:26 AM

#

📎 unknown.png

#

i dont see the bools

devout plume Dec 25, 2019, 12:27 AM

#

Right click stimulus and see break structure or something like this iirc

worldly flame Dec 25, 2019, 12:27 AM

#

oh crap

#

whats the difference between on perception updated vs on target perception updated?

devout plume Dec 25, 2019, 12:29 AM

#

I really don't know lol, I just wanted to have a way to get if the actor was in sight or not anymore and found that node working so didn't dive more into it since I'm still prototyping

#

Here's my quick setup for putting the actor as a target for the enemy when in sight and delete it when not in sight anymore

📎 unknown.png

#

That should give you an idea, sorry for the filter, it's late for me and I need to go soon lol

worldly flame Dec 25, 2019, 12:37 AM

#

got it thanks!

dapper plank Dec 25, 2019, 1:40 AM

#

@fallow hound Thanks for the suggestion. I read about dynamic navmesh generation via invokers. I might go down that path but ideally I'd like to use a static navmesh as I want agents to path even if they are far from the player. I could have several invokers (one per agent, for example) but that seems wasteful.

rapid comet Dec 25, 2019, 1:42 AM

#

It seems the NavMeshBoundsVolume requires the AIController, but you can't set the GameMode Controller to an AI Controller? Confused... 💩

fallow hound Dec 25, 2019, 1:43 AM

#

@dapper plank an invoker per agent is exactly how it was intended

dapper plank Dec 25, 2019, 1:50 AM

#

Ok. So that is epic's intended philosophy? It makes sense from a memory point of view, but performance wise it seems odd (on the surface at least - i haven't checked numberWhat happens if the target location is outside the generated navmesh? Does the pathing algorithmn handle this correctly? I haven't looked into what ue4 uses in this regard. @fallow hound

lyric flint Dec 25, 2019, 1:51 AM

#

@rapid comet I guess it needs AController, not AIController ?

rapid comet Dec 25, 2019, 1:52 AM

#

AIController inherits from AController.

#

I think it needs a Player Controller.

#

If I use a Player Controller I don't think the Nav Mesh will work?

lyric flint Dec 25, 2019, 2:00 AM

#

@rapid comet There may be some misunderstanding. Both AI controller and player controller inherits from AController. The player controller possesses your character, and it doesn't need nav mesh To navigate, instead relies on your input. The AI controller possesses NPC which need nav mesh to navigate the world

rapid comet Dec 25, 2019, 2:01 AM

#

I'm using SimpleMoveToLocation.

lyric flint Dec 25, 2019, 2:01 AM

#

@rapid comet Of course in very simple scenarios You don't need nav mesh at all, for example in a 2-D world with no obstacles You can just use small increments on your forward vector

#

@rapid comet ah, yes, In that case nav mesh May be needed

rapid comet Dec 25, 2019, 2:04 AM

#

@lyric flint I'm using SimpleMoveToLocation. I believe it needs to be an AIController for that... One thing I don't understand... my controller is set in the actor component, but it doesn't seem to be initialized?

#

None of the logs are firing...

lyric flint Dec 25, 2019, 2:05 AM

#

@rapid comet I'm a bit confused, What makes you think that it needs an AI controller for simple move to location?

#

@rapid comet I'm guessing you are using the top view template

#

Out of the box template creates all the classes and a simple world with everything in place to make it work

rapid comet Dec 25, 2019, 2:07 AM

#

I believe its mentioned here:

#

https://www.youtube.com/watch?v=zy7LcHPxVfU&t=309s

YouTube

Mathew Wadstein

WTF Is? Simple Move in Unreal Engine 4 ( UE4 )

What are the Simple Move Nodes in Unreal Engine 4

Source Files: https://github.com/MWadstein/wtf-hdi-files

▶ Play video

#

@lyric flint No, its a custom project. I didn't use any templates.

#

I did migrated the ABP.

lyric flint Dec 25, 2019, 2:08 AM

#

@rapid comet As a test, create a new C++ top view project, and browse the code, you will see SimpleMoveToLocation being used in the player controller class

rapid comet Dec 25, 2019, 2:09 AM

#

Ahh... that good to know... Thanks

lyric flint Dec 25, 2019, 2:11 AM

#

@rapid comet The reason SimpleMoveToLocation Is needed In this particular situation in the play controller is because in this particular instance you are not using inputs to control your player

rapid comet Dec 25, 2019, 2:11 AM

#

I'm going to try creating a PlayerController first and adding in the PathFollowingComp and the ActionsComp.

lyric flint Dec 25, 2019, 2:11 AM

#

instead you set a coordinate destination in the world, and expect the unreal framework to handle navigation to the destination

#

which is very similar to the AI

rapid comet Dec 25, 2019, 2:11 AM

#

I'm moving the character on a grid. So not your typical movement.

#

That right...

lyric flint Dec 25, 2019, 2:12 AM

#

@rapid comet then it may be wasteful to use such a complex framework such as nav mesh

#

instead you may consider A* and forward vector

rapid comet Dec 25, 2019, 2:13 AM

#

haha... I've goon back and forth on that...

#

A*? I'm not sure about that one?

lyric flint Dec 25, 2019, 2:13 AM

#

here I'm using very simple forward vector and velocity

📎 Fun_with_Dick_and_JEDI.mp4

rapid comet Dec 25, 2019, 2:14 AM

#

https://www.youtube.com/watch?v=evd8HpWrfy4

YouTube

Alex Quevillon

[Fast Version] UE4 - A* Pathfinding Tutorial - Part 1 - Project Setup

Add me on LinkedIn :)
https://www.linkedin.com/in/alexquevillon/

[Fast Version] UE4 - A* Pathfinding Tutorial - Part 1 - Project Setup

Good morning,

This is the exact same content than the original version, but only the important steps.
No explanation and as little waste ...

▶ Play video

lyric flint Dec 25, 2019, 2:14 AM

#

I'm not using nav mesh at all, because I don't need it in such a simple flat world

rapid comet Dec 25, 2019, 2:15 AM

#

Ya, I had planned to calculate manually... when I tried the navmesh it just worked... lol

#

I'll watch a few videos and go from there... Thanks for the help!

deep pecan Dec 25, 2019, 2:52 AM

#

I can't find anything anywhere about giving specific nav agents to specific pawns

#

I have a vehicle ai that uses the same navmesh as the human ai. The problem is that the vehicle tries to go to places where it can't fit

#

Can't find any documentation for it anywhere

simple crest Dec 25, 2019, 3:27 AM

#

@deep pecan https://forums.unrealengine.com/development-discussion/blueprint-visual-scripting/119891-character-is-too-big-to-navigate-through-door-way-but-still-tries

deep pecan Dec 25, 2019, 3:52 AM

#

I actually figured it out. I set the find path to use specific nav data

rapid comet Dec 25, 2019, 8:13 AM

#

Trying to get movement to work from the controller. Everything seems setup and being called, but no movement?

#

MyPawn->AddMovementInput(FVector(1.0f, 0.0, 0.0), 200.0f, true);

lyric flint Dec 25, 2019, 8:23 AM

#

@rapid comet It's possible that this function may rely on actual input, such as a keypress or a controller stick

#

meaning that under the hood, the actual input being 0, eventually 0 is being passed, so nothing happens

#

Also, you may try to ensure that AddMovementInput Runs on tick

rapid comet Dec 25, 2019, 8:24 AM

#

I'm binding a key to the function that call it.

#

That weird, he moves when I put it in tick.

#

But I know its being called.

lyric flint Dec 25, 2019, 8:26 AM

#

@rapid comet My recommendation would be to start with a template such as FPS, and browse the code

#

for example, starting from a template immediately creates methods for input binding, move forward, etc.

#

they should work out of the box 🙂

rapid comet Dec 25, 2019, 8:27 AM

#

I looked through the template you mention and help me get the controller working. But there movement was based on the navmesh

lyric flint Dec 25, 2019, 8:27 AM

#

The one you browsed originally was top-down view template, right?

#

the one you are currently referring to may be found in FPS Template

#

They handle movement differently, these two templates 🙂 @rapid comet

#

One relies on input,

#

The other one relies on 3-D coordinates destination

rapid comet Dec 25, 2019, 8:30 AM

#

Oh... whick one is that?

lyric flint Dec 25, 2019, 8:30 AM

#

@rapid comet To muddy the waters, so to speak, you can use on tick something like SetActorLocation(FMath::VInterpConstantTo(vLoc, vDest, DeltaSeconds, nSpeed));

#

this is useful in a predictable world such as grid based where at any given time you know what's in between point A and point B , and you don't worry about obstacles or whatever

rapid comet Dec 25, 2019, 8:30 AM

#

Ya, I had it working like that before.

#

I think I assumed that AddMovementActor would force the character to move a great distance eventually.

#

like 2000, 0, 0... would keep moving until the 2000 was reached.

#

Maybe that's not right...

#

I can probably just set it to 1, 0, 1 until the destination is reached.

#

1, 0, 0

lyric flint Dec 25, 2019, 8:33 AM

#

@rapid comet Browse the code for those two different templates to see how they handle movement

#

You'll get the hang of it in no time 🙂

rapid comet Dec 25, 2019, 8:33 AM

#

Thaks... going to bed... its 4:30 am here... night

#

Thanks

fallow hound Dec 25, 2019, 11:22 AM

#

@dapper plank if the goal is outside of the radius it is up to you to solve. I solved it before by finding the closest point in the navmesh, then repathing once there. But that could obviously run into dead ends. You might want to look into some sort of hierarchical system, like in the Sims NPCs just generate paths from room to room - guided by a map of how rooms connect.

worldly flame Dec 25, 2019, 3:26 PM

#

📎 unknown.png

#

this doesn't seem to work for me

#

any idea why?

pine steeple Dec 25, 2019, 3:48 PM

#

does the instigator have a Stimuli?

#

er not instigator

worldly flame Dec 25, 2019, 3:48 PM

#

no

pine steeple Dec 25, 2019, 3:48 PM

#

damage actor

#

then it wont work

worldly flame Dec 25, 2019, 3:49 PM

#

so how can i report damage from my gun

pine steeple Dec 25, 2019, 3:49 PM

#

add stimuli component to, register is as damage

worldly flame Dec 25, 2019, 3:49 PM

#

to my own pawn?

#

wait the AI has stimuli

#

📎 unknown.png

pine steeple Dec 25, 2019, 3:50 PM

#

the ai does, but the one reporting damage event doesnt

#

also

#

is your ai configured to listen for damage events?

worldly flame Dec 25, 2019, 3:51 PM

#

not beside event ondamage

pine steeple Dec 25, 2019, 3:51 PM

#

wait, what needs to respond to damage

#

the AI?

#

cause im a bit confused

worldly flame Dec 25, 2019, 3:52 PM

#

yea

pine steeple Dec 25, 2019, 3:52 PM

#

and where is that node?

worldly flame Dec 25, 2019, 3:52 PM

#

📎 unknown.png

#

📎 unknown.png

#

this is my perceptionupdated node

pine steeple Dec 25, 2019, 3:53 PM

#

what reports the damage event

worldly flame Dec 25, 2019, 3:54 PM

#

📎 unknown.png

#

the AI and my main characters gun as well

hollow osprey Dec 25, 2019, 5:06 PM

#

hi, I have an AI that follows me (the player), and it's working good. I have a trigger box that when hit will set the AI movement component speed to 0, and restore it after 2 seconds. When it's restored though, the AI won't continue moving.
I verified the speed is returning using tick and print string.
I'm using Task Move To Location or Actor using Goal Actor.
Any ideas?

unborn jungle Dec 25, 2019, 8:39 PM

#

For basic floating AI that follow the player, is it perfectly fine to skip using AI controllers and just have a simple actor that interps on tick towards the player location?

#

I have more complicated AI that need to use the navmesh and it makes sense to go the separate character / controller route

#

But I'd like to be able to cheaply spawn many floating AI and past about 50 characters it really gets expensive

#

Now that I think about it, without needing to use the navmesh, it shouldn't really matter if the code is self contained in a simple actor as it's really just a few basic instructions that update a target location

olive pond Dec 26, 2019, 2:56 AM

#

@unborn jungle yes, you could do it that way. You could even leave behind little markers, invisible ones, and for the ai's to find the player with if they get stuck behind a corner or something. And if they get too far away they could just cheat and teleport to be just off the screen

wide mirage Dec 26, 2019, 6:19 AM

#

The AI could easily avoid any boundaries in it's way.

unborn jungle Dec 26, 2019, 12:34 PM

#

@olive pond Great idea thanks!

#

@wide mirage It seems that avoiding boundaries is actually quite hard in the case where you'd need your floating AI to path from A to B while avoiding obstacles

#

Other than doing constant traces in the direction it is moving to move in another direction until there is space to move in the desired direction again

still grove Dec 26, 2019, 3:56 PM

#

hello guys. Can any one help me pls with my Ai question?) I took a character from paragon models to learn some things and try to make from Crunch ( paragom model ) a kind of creep like in Dota 2 , you know those mobs that go on road from one side to other and attack enemies by the way. I deleted all files and began from start, took only Crunch character , then created AIcontroller, blendspace for mooving and tried to put it in the world. And here comes problem . if i put character in world from the begining with same settings ( i mean AI controlle class is mine that i created ) , then it mooves like i want to those target points that i want . But if I use a spawn of same character every 10 sec for example, they dont moove. they have idle animation but nothing more . I know about settings - Auto possess AI - and i have chosen - placed in world or spawned, also tried spawned . but they dont moove. Moovement i also puted like 300 and 600 max. But still nothing. Gues there is a mistake some where or even a bug but i really cant find it. I can make stream and show some one in discord if you want.

wide mirage Dec 26, 2019, 8:49 PM

#

You should probably just manually place waypoints around the map.

#

@unborn jungle

unborn jungle Dec 26, 2019, 9:31 PM

#

@wide mirage sure but that does limit large open spaces without a more complicated setup to determine a path in which case just projecting to the navmesh may be the play... anyway thanks for the help

olive pond Dec 26, 2019, 11:07 PM

#

@unborn jungle there is also a 3d navmesh plugin in the marketplace for flying ai

still grove Dec 26, 2019, 11:44 PM

#

if some one anyway will read about my problem and will try to help, i found info that physics may effect on this. And yes, if i turn physics on now even character that is already placed in the world has problems and is not moving.. i did some screenshots. May be some one know the problem.

📎 SPOILER_1.jpg

#

📎 SPOILER_2.jpg

#

📎 SPOILER_3.jpg

lyric flint Dec 27, 2019, 12:15 AM

#

@still grove Let's start with the first two characters only. I understand that character number one works fine, and character number two does not. Occam's razor suggests that you should look into the differences between character one and character two and fixed them one at a time until you find the culprit...

#

So here are some questions, and again we are looking for differences

#

is c1 and c2 spawn the same way, it just happens that c1 comes first From a temporal perspective, and it just works (zing!) And c2 appears in the world 10 seconds later and nothing happens?

#

at this point it's really mostly just detective work...

#

Another question, are you using blackboards for these two characters? in particular, can you confirm you are using separate instances for separate characters

still grove Dec 27, 2019, 12:23 AM

#

c1 and c2 are one character, that should have same settings. the only one difference is tha c1 is puted manually in to the world, but c2 appears after 10 sec thrue level blueprint. So tehnicaly , they should have same settings, but something is not the same, and y , i tried to compare them, but gues did it wrong or smth else.

lyric flint Dec 27, 2019, 12:24 AM

#

c1 and c2 are one character : Perhaps this should be rephrased as: they are instances of one Blueprint character

still grove Dec 27, 2019, 12:24 AM

#

yes

wide mirage Dec 27, 2019, 12:24 AM

#

You can always sort them in an array.

lyric flint Dec 27, 2019, 12:25 AM

#

because It's possible, c2 is using c1' success state So there's no reason to do anything from its perspective @still grove

still grove Dec 27, 2019, 12:27 AM

#

if i put more characters in world, they all move . but those that i spawn , not. so gues this is not a problem

#

but i didnt deleted c1 sec

lyric flint Dec 27, 2019, 12:30 AM

#

@still grove So it's possible the characters that you manually put in the world are based on a different blueprint class than the ones you spawn, during PIE Eject your pawn and click on one character manually putting the world and one character spawned And check differences this way

still grove Dec 27, 2019, 12:41 AM

#

ok ty i will try to check all settings one by one

grave coral Dec 27, 2019, 10:40 AM

#

Hello how can i make an animation play once if a boolean is true?

#

In behavior tree

fallow hound Dec 27, 2019, 3:48 PM

#

you could code a basic switch, flip another bool when done and check that bool before running the anim

#

something like bHasPlayedAlready

#

or.... set a really long cooldown decorator

undone hull Dec 27, 2019, 3:51 PM

#

hi guys, do you have any good material of AI Perception on C++? thanks 😄

copper light Dec 28, 2019, 12:26 PM

#

@still grove Make sure you set the actor's mobility to move able after you spawn it.

storm zephyr Dec 28, 2019, 10:28 PM

#

hello, is there a reason why i have to have a level set to visible in the world outliner (with the eye icon) in order to have the navmesh working in that area at runtime?

#

it's a bit annoying because in order to have the entire navmesh working at runtime i have to make all levels visible

#

which is quite taxing on my system

patent hornet Dec 28, 2019, 11:21 PM

#

why would you have anything moving on navmesh on an invisible level?

fallow hound Dec 29, 2019, 12:16 AM

#

@storm zephyr dynamic nav mesh has to be turned on

#

So they can be built at runtime

#

Might need invokers too not sure

storm zephyr Dec 29, 2019, 12:17 AM

#

@fallow hound right now its dynamic modifiers only

fallow hound Dec 29, 2019, 12:17 AM

#

Yeah so some where in project settings is dynamic navmesh

storm zephyr Dec 29, 2019, 12:17 AM

#

so it has to be full dynamic?

#

in order to work properly?

fallow hound Dec 29, 2019, 12:18 AM

#

I'm not super experienced, but I think so if you want to add and remove navmesh at runtime. Like streaming levels

#

But someone really ought to correct me if I'm wrong

storm zephyr Dec 29, 2019, 7:23 AM

#

thnks @fallow hound, ill look into it 🙂

hollow osprey Dec 29, 2019, 2:58 PM

#

I have a decorator above a task that calls Move to Location or Actor, using Goal Actor).
Is there a way to make the decorator stops it in the middle of the task?

ripe tangle Dec 29, 2019, 3:03 PM

#

If you click on the decorator, in the details panel under Flow Control. Observer aborts is what your looking for?

hollow osprey Dec 29, 2019, 3:15 PM

#

sorry for taking so long, was testing it. It sounds like it should, but it doesn't seem to actually abort anything?

ripe tangle Dec 29, 2019, 3:22 PM

#

do you have a screenshot of your behaviour tree?

hollow osprey Dec 29, 2019, 3:23 PM

#

Sure, hold on

#

📎 unknown.png

#

it seems like while MoveWithinRange is working (where it called the task I mentioned above), the decorator isn't even being questioned

#

looking at the behavior tree at runtime, it shows the root "actioned" (yellow), and nothing else

#

nvm, I added a print to the decorator - it is being called. But it's still stuck on that node

#

📎 unknown.png

#

Not sure what's the meaning of the red arrow?

#

ha I just remembered I even got a "Gameplay tag condition" near the top, but it has no Observer Aborts property

ripe tangle Dec 29, 2019, 3:53 PM

#

so i assumed you were just using the blackboard condition decorator. I didn't even realise you could create your own. So i may struggle to help you further

I would look into the decorator blueprint and look at overriding the functions to make sure that when a specific value. I'm guessing in your case its "CanCharacterMove"? if that's false then the decorator will abort itself. Unless you have already done all that? in which case may have to wait for someone with more experience

hollow osprey Dec 29, 2019, 4:23 PM

#

Well I simply overrode the method PerformConditionCheckAI. I don't see any abort method I can call or something like that?

#

I just noticed there are Abort AI and Abort methods in the task blueprint, but I added a print string and they are not being called, so I'm not really sure what else I'm suppose to do 😐

simple crest Dec 29, 2019, 4:50 PM

#

Is your character moving? In your log window your CanCharacterMove decorator looks like it's returning false so move within range isn't going to run, the selector node runs out of options and fails, the sequence above it then fails, and your tree is done executing

#

The task's abort event will never be called if the task didn't start to begin with (I think -- I'm not very experienced with unreal behavior trees)

#

@hollow osprey

hollow osprey Dec 29, 2019, 4:54 PM

#

It doesn't move but I also set the movement speed to 0 (on the character movement component).
And the thing is, if it can't move and I'm getting closer - it doesn't even try to use the ability, which is what I'm actually trying to do

#

when the sequence fails, it should try from start the next time, which is what happens when it can move

#

@simple crest

simple crest Dec 29, 2019, 4:55 PM

#

Well one thing at a time I guess. But you mean your is within range decorator isn't ever returning true either?

hollow osprey Dec 29, 2019, 4:56 PM

#

well it should I am in range, but I'm not sure if it's called; let me add some print string and check that out

#

yeah it's not even being called. Looking at the flow when running:
(1) I added a print string node inside the is within range decorator
(2) if the character is close enough and doesn't need to move, it will print above message every second (or what feels like it)
(3) If the character is not close enough and needs to move, while it moves to me, it won't print it all
From that I can gather while the task is running, it doesn't check any other sibling nodes. It seems to be the same as (3) When the CanMove is false

simple crest Dec 29, 2019, 5:02 PM

#

Well... Yeah, that's the intent, if a task is returning running the behavior tree will continue to check that task until it's failed or succeeded

hollow osprey Dec 29, 2019, 5:02 PM

#

well yeah, but I assumed the decorator can abort it or something, which doesn't seem to be the case 😐

simple crest Dec 29, 2019, 5:05 PM

#

So is your actor moving? (Is your move within range task running/starting even once)

hollow osprey Dec 29, 2019, 5:07 PM

#

the character that get stuck in place is actually walking into a kind of trap, so the move within range is always starting.
And as I said I am also setting the movement speed on the character movement component to 0, but if I don't do that (I just tested it) then yes, he will keep moving

#

Perhaps there is something I need to do in my custom decorator to support that abort thing?

simple crest Dec 29, 2019, 5:17 PM

#

Ah, ok. So your NPCCanMove print is saying true for a while and then when it says false, an abort method on your task should be executing but it isn't

#

And the task is actually returning running during this right

hollow osprey Dec 29, 2019, 5:18 PM

#

what do you mean by "returning running" ? It looks running in the behavior tree window

simple crest Dec 29, 2019, 5:19 PM

#

The return result of your task

#

Sorry I meant "in progress" I'm not used to unreal terminology

#

No wait hold on let me google my dumbass lol

hollow osprey Dec 29, 2019, 5:20 PM

#

lol. my editor isn't open but when running a task you don't return anything until the task is done (or cancelled). I don't remember any in progress or something like that.
Assuming you are talking about a return node

simple crest Dec 29, 2019, 5:21 PM

#

Yeah that's right. So you haven't returned finish execute, is what I meant to say utried

hollow osprey Dec 29, 2019, 5:22 PM

#

nope I haven't. I ran the Move to Location or Actor task, and plugged return nodes on the callbacks (on finished & on failure)

simple crest Dec 29, 2019, 5:38 PM

#

And you've got your decorator set to abort self which should work. I'm not seeing any technical issue yet

#

You might want to set iswithinrange to "aborts lower priority" because that should let that decorator abort the move within range task?

#

Which might be one of the results you're after

hollow osprey Dec 29, 2019, 5:53 PM

#

😮 it's working! Thanks! 🙂
@simple crest

simple crest Dec 29, 2019, 6:10 PM

#

np ¯\_(ツ)_/¯

olive delta Dec 29, 2019, 6:32 PM

#

as soon as the "seeingplayer" boolean turns true i want it to execute the left code. How do i do that?

📎 unknown.png

ripe tangle Dec 29, 2019, 7:25 PM

#

Put an abort self on the "Seeing player is not set" blackboard decorator

#

msh91, glad to see you got ure problem fixed

olive delta Dec 29, 2019, 9:28 PM

#

I did what u told me to do, but it doesn't work

📎 2019-12-29_22-27-38.mp4

#

as soon as i enter the collision i want it to snap to the code where the deer runs away

olive delta Dec 29, 2019, 10:19 PM

#

@ripe tangle

#

: D

ripe tangle Dec 29, 2019, 11:16 PM

#

what print string goes of when the seeing player value is changed?

hollow osprey Dec 30, 2019, 6:52 AM

#

anyone knows how I can know when an npc has lost the player (perception) ?

simple crest Dec 30, 2019, 7:21 AM

#

On target perception updated - check bWasSuccessfullySensed or something like that

hollow osprey Dec 30, 2019, 7:27 AM

#

tried that, but it fires multiple times with the same value (usually true), and once the age of the senses goes up (hence what I'm looking for) it's not firing at all.
I'm considering using a time and resetting it on perception updated at the moment

simple crest Dec 30, 2019, 7:29 AM

#

Not sure what to say. I'm using it in a very basic setup to add and remove the sensed actors to and from an AI's target list, it's been reliable for me

hollow osprey Dec 30, 2019, 7:30 AM

#

I haven't done a complex setup, I think. I have 3 senses (sight hearing and damage), the player, and the npc. Every time I move though the method fires with true.
And when I'm out of sight (e.g. behind a wall), it doesn't fire.

simple crest Dec 30, 2019, 7:33 AM

#

Yeah so far I'm only using sight. It fires once when it loses sight of the target with that bool false

hollow osprey Dec 30, 2019, 7:40 AM

#

mm I think it's my exp age that isn't set right

#

that fixed the hearing, I'll see what's up with the sight. Thanks @simple crest !

hollow osprey Dec 30, 2019, 8:59 AM

#

@simple crest any idea why most tutorials shows to add the ai perception component to the controller rather than to the pawn?

pine steeple Dec 30, 2019, 12:54 PM

#

cause the controller is what handles pathing etc

#

the pawn can change in game, controller doesnt

hollow osprey Dec 30, 2019, 1:05 PM

#

right about path finding, I forgot about it.
regarding change - does it make sense to 'switch pawns' when a perception component is attached though? I'm not even sure the use case for 'switching pawns', but if it is wouldn't you want the perception component to reset as well or even change settings?

hoary peak Dec 30, 2019, 4:11 PM

#

Anyone here who knows which option enables setting default keys for tasks? I used to have the option to do so in the task's class defaults but no longer. It was possible to put in both blackboard key type and type in the key name

#

It might have been in the Class Settings, I don't remember

patent hornet Dec 30, 2019, 4:27 PM

#

BlackboardKeySelector, InstanceEditable?

hoary peak Dec 30, 2019, 4:40 PM

#

Yeah but I used to be able to set default values from within the Task itself so I wouldn't have to set it each time from the BT

#

I don't have that functionality now somehow

#

IIRC the tab was in that window between Blueprint Options & Interfaces

📎 unknown.png

simple crest Dec 30, 2019, 4:55 PM

#

@hollow osprey in unreal terms, the controller is the "player" ... The player is what sees things, makes decisions, and provides input for the pawn. A behavior tree and perception component for an AI controller replace a human's brain from a player controller. That's how I think about it at least. If a different character should be dumber or smarter it should have a unique controller somehow

pine steeple Dec 30, 2019, 5:53 PM

#

@hoary peak pro tip. name the blackboard key selector the same as the blackboard key

#

it will auto select it.

hoary peak Dec 30, 2019, 5:56 PM

#

@pine steeple Do I need to add spaces for the blackboard key names in the blackboard for that to work? Because it doesn't work for me

pine steeple Dec 30, 2019, 5:56 PM

#

no?

#

you should not add spaces for names

hoary peak Dec 30, 2019, 5:56 PM

#

I don't

pine steeple Dec 30, 2019, 5:56 PM

#

always worked for me, i do it all the time

hoary peak Dec 30, 2019, 5:56 PM

#

But visually they get auto spaced in the BT view

pine steeple Dec 30, 2019, 5:57 PM

#

yeah but thats just the BP system

#

it spaces before every capital letter

#

like SomeVariable becomes Some Variable in the display, its just visual

hoary peak Dec 30, 2019, 5:58 PM

#

Still doesn't work for me though

#

They get defaulted to the first variable in the blackboard list

pine steeple Dec 30, 2019, 6:01 PM

#

hmm must be a c++ only thing then :/

#

welp looks like you will just have to manually set it every time

#

maybe just copy paste and preset node

#

to save hassle

hoary peak Dec 30, 2019, 6:03 PM

#

I know for sure that there is some togglable option that allows you to make it automatic but I have searched through editor and project settings but found nothing

#

I lost it when I reinstalled then engine

pine steeple Dec 30, 2019, 6:05 PM

#

i don't think i have ever seen that

hoary peak Dec 30, 2019, 6:37 PM

#

I have no idea how I toggled it, I can't seem to find the option anymore. Though I think it was an option that showed you a lot more stuff in different areas of the engine and not just the option to set default key values

left rover Jan 1, 2020, 8:52 PM

#

Help needed! After I went from 4.23 to 4.24 my AI hasn't been able to move anymore. When I press "P" the navigation is there as usual. Moving the navigation bounds a bit to rebuild everything doesn't work either. I mean.. It rebuilds but the AI's still aren't moving. I've changed nothing since 4.23. So...
o Is there some tick in the project/editor settings that I need to untick/tick or...
o Have there been some changes to GetRandomReachablePointInRadius and SimpleMoveToActor nodes or...
o Is this a bug?

I'm not getting any errors. The AI isn't roaming, still clearly aggroes the player when it sees it but it can't move. Also kills the player if I walk close enough so that's fine. It's just the walking / charging aspect so I'm guessing issues with navmesh. Be it a bug or my own lack of knowledge.

left rover Jan 1, 2020, 9:54 PM

#

Ok! Deleting RecastNavMesh and Building navigation once again to create new RecastNavMesh did the trick. 🙂

sterile smelt Jan 2, 2020, 1:06 PM

#

Whos up for creating amaing ai

#

amazing

pine steeple Jan 2, 2020, 2:11 PM

#

#looking-for-talent

sterile smelt Jan 2, 2020, 2:20 PM

#

What you need

olive pond Jan 2, 2020, 10:39 PM

#

@sterile smelt that's the channel you want to go to on Unreal Slackers for that kind of question. It's the channel for people who are looking for someone to help them make a project.

quartz urchin Jan 3, 2020, 1:49 AM

#

Happy new year everyone! Have a question about AI Perception sight sense. I guess it is a popular problem so may be someone have a good solution. AI Perception can see (detect) only the middle point of my character. Is there any option to add some sort of offset for this at least?

quartz urchin Jan 3, 2020, 2:04 AM

#

📎 unknown.png

wary ivy Jan 3, 2020, 1:20 PM

#

https://blog.gamedev.tv/ai-sight-perception-to-custom-points/

GameDev.tv

Carlos Pardo Vimes

AI Sight Perception to Custom Points - GameDev.tv

In this post, Unreal Engine Developer course student Carlos shares his awesome detective work (and code) on getting AI sight perception to custom points… On the way to creating a metal gear solid clone game, I was following the testing grounds videos. I already had guards w...

#

is the project some starter/template? Same pic in the article 😄

pastel hare Jan 4, 2020, 3:04 AM

#

Is there a maximum number of actors the behavior tree can handle? If I have about 50 NPCs running the same behavior tree it works fine. However, if I spawn say 200 NPCs the simulator only lights up the root node and the NPCs appear to stop running part of the behavior tree (they no longer run towards the player, but they still attack)

fleet meteor Jan 4, 2020, 3:19 AM

#

Are Behavior Trees multithreaded? No one really seems to say anything about it one way or another.

pine steeple Jan 4, 2020, 3:39 AM

#

are you using crowd following?

#

if so its hard capped by default

pastel hare Jan 4, 2020, 9:11 AM

#

@pine steeple yes, I'm using UCrowdFollowingComponent

pastel hare Jan 4, 2020, 9:28 AM

#

thanks for highlighting the cap

unborn jungle Jan 4, 2020, 7:19 PM

#

Is it possible to stop navmeshes being generated inside meshes?

#

For example if I have a terrain mesh and place a large cliff on it, there is navmesh inside that cliff on the terrain floor

#

And since I use the navmesh to spawn things, many times enemies get spawned inside objects and can't escape

#

The only solution I have found is to manually place nav modifier volumes everywhere which is very time consuming and doesn't match the shape of the cliff

pine steeple Jan 4, 2020, 8:18 PM

#

if your mesh has a collision

#

on that lower level

#

then it would

#

other way is to remove collision on that lower part of the mesh/inside of the mesh

#

which is the proper way to do it

unborn jungle Jan 4, 2020, 8:28 PM

#

@pine steeple Yeah it works if I align the bottom of the mesh exactly with the terrain

pine steeple Jan 4, 2020, 8:28 PM

#

issue, is navmesh doesnt really do any checks, i mean you can adjust the grid size, etc

unborn jungle Jan 4, 2020, 8:28 PM

#

But this limits my use of that mesh and I can't put it above or below the terrain and even then then, it's rare that the terrain matches the slope etc.

pine steeple Jan 4, 2020, 8:28 PM

#

but it doesn't account for height

unborn jungle Jan 4, 2020, 8:29 PM

#

So would a good solution to do as much as you can with the terrain heightmap instead?

#

I'll try using clipped cliffs that have no bottom side

#

That might work as mentioned with the collision

pine steeple Jan 4, 2020, 8:30 PM

#

its i suppose what ever you need to do to stop the nav generating there, its a bit of a pain tbh, i know we made a custom navmodififer component on certain stuff

#

which adjusts the bounds to stop the navmesh generating

unborn jungle Jan 4, 2020, 8:30 PM

#

That's very nice

#

I wonder how fortnite does it with the insane amount of stuff on the map stuck into the terrain

#

Then again it probably doesn't matter as they aren't spawning stuff on the navmesh most likely

pine steeple Jan 4, 2020, 8:32 PM

#

the use a navmesh

#

but i think there spawning stuff is deterministic/using eqs to determine the best spots

#

that kinda thing

unborn jungle Jan 4, 2020, 8:34 PM

#

Ah yeah so there would probably be LOS stuff and more to ensure it's in a valid place

#

Makes sense

#

At the moment I'm just picking a random point on the navmesh near the player to spawn enemies

#

Probably should refine that and then maybe the navmesh being inside other meshes wouldn't be an issue

trail scarab Jan 4, 2020, 8:35 PM

#

hello, does anyone have experience with find path to actor synchronously function?

#

documentation says resulting path will automatically get updated if goal actor moves more than TetherDistance away from last path node but that looks like that event never fires on my situation

#

📎 unknown.png

ocean wren Jan 4, 2020, 8:46 PM

#

does fortnite have AI?

hollow osprey Jan 4, 2020, 8:48 PM

#

I need to create nav mesh volumes for a big landscape. Should I create a single huge volume or multiple volumes? does it even matter? (I need it on the entire landscape either way)

ocean wren Jan 4, 2020, 8:50 PM

#

are you using scene composition?

#

or whatever that bloody thing is called.. world composition thats it

#

in which case, my guess is that you'll need to break your landscape into chunks and then get each chunk to generate its navmesh

#

or add navmesh generation proxies to stuff that will need a navmesh near it

#

have a look at how they setup the boy and his kite demo

#

they used the nav proxies in that apparently, for the deer and shit

hollow osprey Jan 4, 2020, 8:53 PM

#

I am using world composition yes. "break your landscape into chunks" - what are you talking about? what kind of chunk? break how?

#

(opening a boy and his kite in the meantime btw)

ocean wren Jan 4, 2020, 8:54 PM

#

the chunks of landscape you are using for the world composition parts

#

I assume you're using landscape tiles? I meant the individual tiles

#

tile = chunk

hollow osprey Jan 4, 2020, 8:55 PM

#

oh yeah. each tile is a level as far as I know though, and I'm talking about a single landscape in a single level

ocean wren Jan 4, 2020, 8:55 PM

#

oh, well a single landscape in a single level max size is around 8k, I assumed you meant larger than that

hollow osprey Jan 4, 2020, 8:56 PM

#

8k what? mine is 1009x1009 vertices. I could be wrong but it sounds big to me

ocean wren Jan 4, 2020, 8:56 PM

#

but afaik, you can generate a navmesh per area you load in the world composition

#

8k meters

#

it actually gets a bit fruity before that due to floating point shit

hollow osprey Jan 4, 2020, 8:56 PM

#

well it's 8k on each side, that's an area the size of 16k^2m no?

ocean wren Jan 4, 2020, 8:56 PM

#

yeah

#

which is pretty much the upper limit on a single terrain

hollow osprey Jan 4, 2020, 8:57 PM

#

Anyway yeah I was under the impression each level can have it's own navmesh. The question is - should I use a single navmesh for my landscape (1009x1009) or multiple small one? does it even matter?

ocean wren Jan 4, 2020, 8:57 PM

#

actually a tad over it when I tried doing that

#

well, it depends a lot on if you're doing multiplayer

hollow osprey Jan 4, 2020, 8:57 PM

#

nope

ocean wren Jan 4, 2020, 8:57 PM

#

if I recall rightly, world composition doesn't work for multiplayer

hollow osprey Jan 4, 2020, 8:58 PM

#

good, because I'm not.

ocean wren Jan 4, 2020, 8:58 PM

#

might be fixed by now though.. you never know with epic 🙂

hollow osprey Jan 4, 2020, 8:59 PM

#

probably is btw; it always looked to me like epic is trying to make the engine fit an mmorpg. that's just how I saw things anyway

ocean wren Jan 4, 2020, 8:59 PM

#

well, the main thing is the resource hit for a single large terrain.. on the other hand, I guess they've optimized all that for fortnite since I tried

#

well, the world composition came about because epic Korea had to make a large terrain for some company

#

so you're not far wrong 🙂

hollow osprey Jan 4, 2020, 9:00 PM

#

I'm still not sure though - a single large nav mesh volume or multiple small ones?

ocean wren Jan 4, 2020, 9:01 PM

#

my pref would be a single large one

#

because I don't trust epic's code 🙂

hollow osprey Jan 4, 2020, 9:01 PM

#

I don't like that answer :p

ocean wren Jan 4, 2020, 9:02 PM

#

well, unless you need to, why make it more complicated?

#

if you're not using world composition, then I don't think you can have more than one navmesh on a single terrain anyway (outside of for different sizes)

hollow osprey Jan 4, 2020, 9:03 PM

#

.. I am using world composition.