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Hey I tried it, but it didn't worked. I get error codes like it could not found a function name GetProperty Value, this is out of the Event Graph of the Face AnimBP. :(

State Tree has huge potential for a player skills type of system that integrates with an external system like GAS. Do you know how to handle event based states within a state tree? I noticed with State Tree each state is connected to a root state and the state will be auto selected. But I couldn't see a good way to handle states that are event driven and only allow a transition into that state when an event fires. I know we have send event to state tree, but the state itself will be auto selected if it's added as child of the root state. I can add a sibling state but when setting a transition to and from it based on an event I get an annoying "verify this is intentional" warning for each time I do it. An example of this would be like a hit reaction state or a parry state that only runs when an event triggers a transition to that state. How do you properly handle such things with State Tree?

This is definitely a cool method, but it doesn't scale very well because you are doing a texture sample multiplied by the number of pixels in your render target *per pixel* on the screen. As you can imagine this will get expensive very quickly and should only be used with tiny render targets! (small arrays) I tried something like this myself but ultimately had to abandon it because I couldn't get past a couple hundred array elements before my GPU started to light on fire :(

Check out my new video about filling a curved spline with a simpler method ruclips.net/video/UbY0pHhCwNU/видео.html

Yo, I'm glad you've just uploaded an updated method, I'm working on something that could use this technique!

interesting idea, thanks for sharing.

Oooh! Gorgeous! What a good introduction!

The generation times were super slow in the video because I kept the resolution value very high (5). Make sure it's adjusted in your code :)

This topic is too old but have much more power

Thanks for the video. I've been diving in to the StateTree/SmartObject/GameplayInteractions source to get an understanding of what's going on. Your's and UnrealDevOp's videos have been helpful in getting a feel for how all the stuff works together. You might have already fixed this, but you have a typo at 19:11 for UMRKStateTreeComponent meta specifier BlueprintSpawnableComponent.

Sorry for audio crackling, i was too close to mic cuz I was in a beef mode :V

Thank you so much for this, got me started. One question I have. I want to make an actor (a controllable region/province/state) that is created when the spline loops. With it I will have modules attached to the parent. What BPP's will I use to make the parent as when I type in spline there are lots of options. Thank you

Brilliant! Thanks a lot for sharing this.

i did that step by step but the metaballs still dont affect each other.

Hello RUclipsr, firstly, the state tree can interact with smart objects in version 5.1, and it doesn't require the interact plugin, on mass AI.

Hi, i went through your code, and the variable TexSampler is referenced but is not defined anywhere? What does this variable do?

Great video!

Hi MrKosiej, great video as usual! I haven't had the chance to test 5.4 yet as several of the plugins I used are still not compatible, but I'm excited about the things you showed in your recent videos, specially the ability to have the controller like you showed. I will definitely experiment with the approach you suggested, since my approach with blackboards work, but it's a bit cumbersome and requires a lot of boilerplate. Also, one thing that I'd like to highlight and I really hope Epic address in future updates, is the amount of state tree related things that are C++ only. Even though I'm very familiar with C++, there are several things I prefer to do with blueprints and currently state trees are still a bit limited in that sense. One example are state tree events. I found the need to send data along with the event, and I was surprised to realize state tree events actually support payloads along with the tag that acts as the event name, but you can't use event payload in blueprints.

State Tree definitely needs some system implemented for data management, either through adding official support for Blackboard or by creating some scratch pad system that allows you to store and read variables from it. There's also a lot of interesting and good changes to State Tree in the release version of 5.4. The new state tree AI component schema comes with a new Move To task, hopefully in new versions they will add a lot of the default tasks you can find for Behavior Trees. Another interesting change is the addition of states having their own parameters. Speaking of parameters there's also a really great change with them, in 5.3 and older if you changed the value of a parameter in the state tree asset, state tree would ignore that and only take the values set from the state tree component class defaults from the blueprint. Now, it will take the values for the parameters from the state tree asset by default and if you want to override them from the component blueprint class defaults you need to check a bool. This is far better because now this will allow you to set default data to change AI behaviors from the state tree asset itself without the need to modify it from the blueprint component class defaults. Makes things more modular. I still have a list of things I'd like to see them change or add, but they're slowly getting there! Hopefully Epic continues to make great changes to state tree!

Thanks, helpful approach

how to make state tree tasks and evaluators in c++?

Been watching articles about this sort of setup elsewhere, but never attempted it. Appreciate this tutorial, but have not been able to get it to work. Not sure why but my Shader spits out a "Gradient instruction in a loop with varying interation, attempting to unroll the loop".

thx! I hope unreal will break the limitations and enable that textures can be animated. This would be amazing I think

Could you cover the blueprint version in more detail?

That is a very intersting new addition. Thanks for covering it.

I think Slot Linking is broken, I've been stuck on this for about a week now and just stumbled across your video, have you figured out what's up with those? In that GDC video he sets them up to be linked but I don't think they were working in that one either....I find it odd too how he did that entire video in 5.4 a year ago lol Also: I noticed that in both the GDC video and in mine the Looping animation starts blending out between loops, this causes a visual Jerking as the animations loop back around....but maybe something else is causing it.

Newbie question. How did you get the arrows to appear on the connections between blueprint nodes?

I hav a question,fog distance to landspace is erro,I Don‘t konw why.Dose it landspace auto detection to fog?

Yes, I would like to know more about this view stuff. :)

Nice video again, thx. The transition event trigger is a very nice way to abort some action or npc behaviour. I was wondering how I would do that in a state tree, now I know. :)

Not sure, but I think you may also need the "Ai Behaviors" Plugin enabled.

Hoping documentation will come out with full release in a month. Thanks for the video!

Watch part 2: ruclips.net/video/2qm36e_apNQ/видео.html

Subscribed! Great Tutorials. Thanks for making them! How did I go so long without using State Tree's! Please keep them coming. :)

Using it to continuously update a displacement map used with nanite tesselation might be a fun way of increasing room temperature :)

Great Tutorial! and I have a quest for [global view model collection]. I print they in Game Instance, My [Viewmodel Engine Subsystem] is Valid, [Viewmodel Binding Subsystem] is Vald, but the [Viewmodel Game Subsystem] is not valid, when i use node [add view model instance] retrn value is always [false]. I can use [ manual ], but I cannot use [ Global View model Collection], I need manual open [Viewmodel Game substyem]?

Excellent explainer! Thank you.

I like how the logic driver plugin works. You are not creating different assets for tasks, not much syntax while programming. Everything in one asset

Note: State Tree parameters actually work, you just can't add them from the parent State Tree, you have to do that from child State Tree and it will show when selected in the parent, then you can change them. Also, you can go back to the parent state tree by executing Tree Succeeded/ Tree Failed on the child State Tree.

I don't think it's meant to be a replacement of material graphs, because material are multiple textures. This new graph is to generate what would essentially be the equivalent of single maps in memory.

It's promising! I like your content since you cover less usual areas of the engine, I found a new plugin that might interest you in 5.4: "Geometry Mask". I’ve never heard of it before stumbling on it while looking through the plugin list

Nice. In 5.4 they added some Gameplay Interactions Plugin that also combines StateTree and SmartObjects.

Maybe you could take the player's name and generate a PBR material with textures from the texture graph. Can you get a text input? Make a black and white map, then normal from height map.

It can be more interesting if they add texture graphs support to materials like texture samples. Thank you for the video!

Great info. Glad you shared. Interesting

this is absolutely amazing. It's a shame that AI is trying to erase material authoring, it was my favorite thing. Btw, do we know if Quixel guys are behind this project?

Excellent video and very useful information about StateTrees, specially given how very little documentation is available about it. @MrKosiej, one thing that I couldn't figure out is how to store state in between tasks (for example a given task sets the value of a variable that is used by that same task again the next time it runs, or maybe by another task in the three). I know I can probably use the actor associated with the context and store everything in it, but I think it would be cleaner to keep these variables inside the tree itself. I've tried using bindings, but for some reason I can only read from bound variables, never write to them. Do you have any advices in that regard?

Check out my fog of war using arrays in materials ruclips.net/video/5QiJoXuvZYw/видео.html

Check out my fog of war using this method ruclips.net/video/5QiJoXuvZYw/видео.html

You saved me :D