RAIN Artificial Intelligence (AI) Engine v2.1 More Powerful, Still Free

@{RT}_Jester Great! i cant wait to try off mesh link and stitching in order to add procedurally prefab based rooms

 

It wouldn't take much. You would need to do a bit and make a custom motor or custom navigator to bypass our navigation.

I hope this helps.

 

is dynamic obstacle avoidance available already?

 

Throwing some more ideas out there... What about having the AI work in factions independent from player control? Such as this scenario:

AI group A (terrorists) and AI group B (mercenaries) attack each other on sight. Terrorists attack the player but mercenaries do not attack the player. AI group C (militia) attack mercenaries but no one else.

Then, if you have a squad of teammates, they will automatically engage hostile units (terrorists), but perhaps you could also order them to attack non-hostile units (militia and mercenaries).

I'm assuming such a scenario is not available out-of-the-box but can be set up with (hopefully not too much) work? Thanks again

 

We're getting very close to a version of this feature that's up to our quality standards.

 

Yes, this scenario is completely possible. Squad Command already has all the components you'll need to set it up and tweak the behavior to your liking.

 

I think Squad Command is for FPS Game...
Do you have plan to make RPG AI PACK Or Action Game AI Pack? Or Racing Game AI Pack??

 

Yeah I notice there's a shortage of vehicle combat AI (cars with guns, tanks) in the marketplace. I wonder why that is.

 

Absolutely. The level of success of Squad Command will influence our future projects-- so any feedback you give us will be helpful.

Let us know what you want to see and I will take into consideration all suggestions. If there is enough interest I can put together a Trello board for suggestions and voting on future AI packs.

 

Vehicle AI has it own set of challenges but we were messing around and created a custom motor that allowed us to control vehicles in RAIN.

Check it out: http://rivaltheory.com/forums/topic/just-for-fun-vehicles-in-rain/

Let me know what you think!

 

Is there any out-of-the-box functionality for enemy melee attacks? (knife, bayonet, rifle-butt, zombie swipes). Thanks as always

 

Yes, you would need to modify the attack range animation but it should take very little setting up.

Let me know how it goes!

 

Squad Command Tutorials 1-4 are now live!

 

I just started to watch the Squad Command Tutorials.. very nicely done. It is good to get more understanding of how to achieve things with RAIN.

 

Hello, I just loaded up the basic scene that comes with the Rain 2.1 example, and I got this error within a few seconds of hitting play. I couldn't reproduce the error, but errors that can't be reproduced make me even more nervous, so hopefully you guys can determine what caused this (I made no modifications at all, I just hit play):

NullReferenceException: Object reference not set to an instance of an object
at RAIN.Motion.BasicMotor.UpdateMotionTransforms () [0x00000] in <filename unknown>:0
at RAIN.Core.AI.Pre () [0x00000] in <filename unknown>:0
at RAIN.Core.AIRig.AIUpdate () [0x00000] in <filename unknown>:0
at RAIN.Core.AIRig.Update () [0x00000] in <filename unknown>:0

 

Also, can you point me to a tutorial on how to write a custom navigator? Thank you

 

Will dynamic obstacle avoidance prevent units from trying to walk through each other (or sometimes getting stuck trying to walk through each other, or two headed beasts like below)?

 

If a behavior tree is modified (even during run mode), it seems the changes are instantly saved permanently, even if reloading the scene or restarting Unity without saving.

Is there a way NOT to instantly save changes, so that it is allowed to "experiment" a bit without automatically saving all changes?

Also, there is no undo functionality when working in behavior trees?

Thank you!

 

1.

2.

1) I tried RAIN Starter and RAIN Quick Start (if I find out what project I can test that instead), and could not replicate the error. The error is indicative of the AI Body being set to null, but we have a lot of catches for that so it is a little odd to see that outside of a very custom setup. We'll keep looking into it.

2) Behavior trees are assets (not unlike the Mecanim state machines for instance) and because of that they are saved even when running. We are going to support a more robust undo/save setup in the future, but until then we recommend backing up or copying your trees when trying new things (we know this is not ideal).

Let me know if this helps! Thanks again for all the questions

 

Thanks for the question and screenshot! Also, congratulations on getting to the end of Squad Command.

Dynamic obstacle avoidance is more of an environment navigation tool (falling walls, collapsing bridges, moving prefabs, etc.) for the AI. For that particular issue (the AI arriving at the same spot and staying there), I would not use any avoidance solution.

I have a few questions on how you managed to get his behavior. Were the AI following you or did you find them like that? Were they in formation? Let me know, we have our harness rigged that the AI are not supposed to choose the same place to stand at the same time.

Talk to you soon!

 

Hello everyone!
Happy Holidays from Rival Theory! We made a free AI starter kit to teach you how to make AI in games.

Check it out and spread the cheer!




Download: http://rivaltheory.com/community/tutorials/

Let me know if you have any questions! We'd be happy to talk about how we built it.

 

Sure, I will share my secret battle tactics honed through harsh years of video game combat.

First of all, I set up an ambush by ordering my squadmates to take cover by the edge of the nearest buildings. I hung back until the enemy engaged, and then I moved forward to engage while simultaneously ordering my men to flank the enemy.

Because of my superior marksmanship, I was able to eliminate most the tangos myself personally. My flanking men keep running all the way to the tower and promptly morphed into a two-headed ettin, and that's where I found them.

To be honest, I was killed like 10 times before this tactic succeeded. The Warfighter AI puts up a good fight!

 

Think you might have missed this question... can you point me to a tutorial on how to write a custom navigator that works with other pathfinding (such as A* Pathfinding Project)? Thanks!

 

EDIT: I found this but I cannot confirm that it's still valid http://arongranberg.com/vanillaforums/discussion/820/integration-with-rain-indie

I have not seen one in a long time so I'm unsure where a relevant one would be. I would start on Aron's website and then ask around. http://arongranberg.com/astar/

Let me know if this helps!

 

Awesome work on the AI starter kit. Really appreciate it. Still got to get the Squad Command asset you made.

 

How do you suggest we handle not wanting units to walk right through each other during patrol? It would be nice if they walked around each other.

 

Thanks Jester, that does help. But the main reason I wanted to use A*Pathfinding Project was its extremely fast ability to generate runtime navigation of procedural terrain (boulders, buildings, obstacles, etc).

But I just realized RAIN's dynamic navmesh generation is pretty fast and might make A*Pathfinding Project unnecessary for me. Question: will you guys be working on improving the speed and performance of the runtime navmesh generation further?

Also, it might simply be even faster to have a pre-made navmesh with ai units that detect procedurally generated obstacles (using dynamic obstacle avoidance). Do you think dynamic obstacle avoidance will be ready anytime soon?

Thanks very much as always!

 

Hey Rivaltheory! Even though my AI is rather basic, I've not been having much fun dealing with behavior trees and state machines for AI directly in my own code. So I took a look around for possible solutions and found RAIN. I really liked what I saw and am considering implementing it into my game in certain parts, but I had a couple questions regarding the project's future.

I'm mostly concerned that utilizing a 3rd party tool into such an important part of the game functionality will end up causing a kink in my production if it becomes unsupported. It would be no easy feat to replace it once it's nailed in. RAIN is apparently free and I can't find any add-on purchases or donation pages on your site either. I was wondering how RAIN makes money for your talented team to keep it alive.

What is your business model and is it proving sustainable to consider continued development for the next several years?

Thanks for your time, and sorry if this has been asked before!

 

Hello,
Can i use it also in a Space Shooter Game?
And how is the performance on Mobile?
many zhxxx

 

Yes, we are constantly working on the speed/efficiency of the nav mesh generation and yes dynamic obstacle avoidance will be available soon.

 

Thank you for posting this. We do have add-ons that we sell. One is called Squad Command https://www.assetstore.unity3d.com/en/#!/content/23526

We have been developing RAIN for the last 3 years and will continue to support it for the foreseeable future.

I hope this answers your questions, let me know if you need more details.

 

Yes you can use RAIN in a space shooter game. Its performance on mobile is excellent. There is a lot of options for optimization with RAIN so it will certainly suit your needs.

 

That last point is not the same as the others because that's the end of the game. We can put the change in that the AI treats that last point as it does the others.

Thanks for posting this

 

Not yet but it will be available soon.

 

Is it possible to alter the found path with a raycasting system ? Maybe use rain together with Breadcrumb AI or similar technique ?

How would i grab the found path points in code ? Or override the motion imposed by the path when a dynamic obstacle is in the way ?

I suppose one way would be to do local avoidance by disabling the Rain AI mover on the hero and re-enable after there is a good distance towards the next way point and away from the obstacle. This could cause some zig zag motion though and i am not sure if Rain would like disabling the agent and re-enabling it.

Thanks

 

I will wait till this is possible with RAIN.

I saw the demos, and I really love how easy it is to create AIs using RAIN..!

I am currently using a procedural dungeon system to create dungeon rooms.

Run-time Navmesh creating, or Navmesh stitching is definitely a must have feature.

Please inform us when this is done!

 

I'm sorry for the late response, I must have missed it

Yes, you can grab the path from the BasicNavigator (CurrentPath property) and modify it directly. You can also apply a new path using the same property. There are some particulars though. If you come to the forums we can give a better explanation. There is some new stuff in the next version that will help this as well.

Let me know what you think!

 

We certainly will!

 

We're looking for people to check out a new type of AI Character before we release it to the public.

If you're interested, email media@rivaltheory.com with "I'm interested in the AI Character focus group" in the subject line.

For your time, we'll give you a copy of the Character to keep.

Talk to you soon!

 

What can i do to fix these errors?


ActionTemplate_CS.cs(8,14): error CS0101: The namespace `global::' already contains a definition for `ActionTemplate_CS'

ActionTemplate_BOO.boo(4,7): BCE0132: The namespace '' already contains a definition for 'ActionTemplate_BOO'.

 

I'm wanting to use rain for the pathfinding and waypoint system but my game is a rpg and the combat will not be handled by rain how can i disable the ai once combat begins and how do i reengage ai after combat has ended?.Basically once a enemy is detected i want rain to cease and desist.

 

Just wanted to drop by and say that both a zombie ai package and wildlife ai package would be cool. What are your future package plans?

 

I'm having trouble getting RAIN to work with basic Mecanim controllers. From the examples, it looks like RAIN doesn't simply play animation states, but instead passes variables and the variables are expected to control animation flow. However, my Mecanim controllers are rather simple and only require Animator.Play(string) to work properly.

How can you get RAIN to simply play Mecanim animations similar to how it does for the legacy animation system?

 

It appears that you may have two copies of RAIN in your project. Let me know if that helps!

 

There's an "Is Active" button on the AI. Turn that off when you need to. It works like a pause button so the AI will resume what it was "thinking" at the time of the pause. Some things do reset like pathfinding though.

Let me know if this helps!

 

Zombie AI and animal AI sounds like great ideas! To stay up to date on all the stuff we release, follow us on social media or signup for our newsletter.

Thanks for the ideas!

 

You're going to need to write a custom action. I would look for an example of other custom actions to see how others made them, then I would build my own and play around with it.

Let me know if this works for you.

 

SENTIO Darkness Warlord is now LIVE

Drop in a Sentio Character into a scene watch him start behaving automatically.

Check it out on the Asset Store!

https://www.assetstore.unity3d.com/en/#!/content/28751

[Video 1:28]

 

I dont know if this been asked before, but can I use Rain{Indie} for ai on large scale terrains/multiple terrains at once? More specifically, I'm trying to make zombie ai that has the basics actions of wandering, attacking, avoiding objects, etc, and I will also spawn them in-game. Will the ai system automatically update for this?

 

SENTIO Minotaur is now LIVE

Drag, Drop, Play

Check it out on the Asset Store!

https://www.assetstore.unity3d.com/en/#!/content/30177

Minotaur is a Sentio™ Character, a complete fully-rigged model with animation, sound effects, and AI-driven movement and behavior.

Learn more at Rival Theory http://rivaltheory.com/sentio/characters/