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There are many ways to implement this, with tradeoffs between difficulty and correctness. As I said in the video, this is a simple solution that works in most cases and would be improved with a more complete set of animation clips. If you have a better approach, please go ahead and post it. I and others would be interested in your solution.

Right, this video does not include the case when players / enemies collide / fight, etc. The example shown is just wandering / patrolling behavior.

Thanks for the nice comment! All the animation clips are from the Unity Standard Assets which used to be available for free on the Asset Store, but unfortunately are no longer available.

I agree. As I said in the video, there is less foot sliding for forward motion. The foot sliding is worse when the NPC turns around, mostly because the animation clips do not include this type of motion, like walking backwards. The video is intended to show the general approach.

Thanks for your comments and questions. I had not really stress tested the system in the video much beyond what is shown. So yes, there were 8 instances of the environment, but I had not tried more than that. I think you are right about training at 20x, but I had not tried other values to see how the results would compare. There are so many permutations of things that could be tried! Sorry not to have better answers. Good luck on your project!

Glad it helped!

Sorry if you had trouble understanding the video. I try to use pretty simple English but can't be too simple given the complex topic.

I really like the City Slum asset. Too bad it is no longer available. Good luck finding assets that will work for you!

@@ClockworksGames I did find a Russian download to it so I could use it in a demo scene obvs not for releasing and Thank you idk if I want to create a full game but I just want to create a little demo even if it's just for me to enjoy and to be like I made this and it's fun (hopefully it's fun lol). Good Luck with whatever you are working on now :)

Thank you! (Sorry for the delayed reply; I was traveling.)

@@ClockworksGames worry out king

Yes, the car would also need a collider.

Thanks for your feedback on the Humanoid AI video series. Unfortunately, I have been busy with some consulting work over the past year, and it has been a while since I have created a new video, but I do hope to get back to it. Regarding your question, I recently tested my NPC Populator Unity asset in Unity 2022 and 2023 and it still works. I think the same should be true for the techniques shown in this video. Please let me know if you encounter any problem or if you think anything has changed. As far as I know, it should all still work. Unity has reorganized NavMesh into an optional package and added some new capabilities, but I believe it is still backward compatible.

@@ClockworksGames Thanks for the reply, Im glad you are still alive and kicking! I really enjoy your teaching style, and Im looking forward to updates to the the ML Agents side of things. Good to hear that NPC Populator is still valid, so thats a definite buy from me.

I'm glad the video was helpful!

For crouching movement, I would create a separate blend tree in the same animator controller.

Unfortunately, since I made this video, Autodesk no longer provides their tool for creating human models for free. I had thought that was one of the best. I haven't evaluated many of the recently-released assets. It may be worth checking out UMA. Models from Reallusion look to be of high quality. They offer a couple of free ones, but most of their models are not free.

Thanks!

Unfortunately I don't have experience importing animations from Blender.

Thanks for the comment! Unfortunately, Autodesk is no longer providing their tool for creating characters for free.

Fantastic! Thanks for subscribing!

Please see the videos I made after this one, especially: ruclips.net/video/nIozvpOsb0Q/видео.html.

I'm glad the video was helpful!

Very cool! Is there any way that I could see what you made?

Thanks for the comment! Unfortunately, Unity no longer has these free animation clips available, which I think is a loss in terms of being able to use them for tutorials like this one. There are different free and paid animation clips available, but the controller would need to be a bit different. The replacement free clips from Unity that are available now are more basic than what they used to have -- just idle, walking, running, but no turns.

Thanks for the comment!

If you set the height of your waypoints to follow the slope of the ground, the drone should track the slope by traversing among waypoints. When you try to navigate through hallways, I assume you are using waypoints, because the Flying Drone Toolkit requires waypoints. Early in the development I had tried to implement a mode that did not rely on waypoints, but without waypoints it was very tricky to have a drone correctly navigate along reasonable paths, such as moving through urban streets without sometimes colliding with buildings. Small hallways would be even more difficult. Each waypoint does need to have an unimpeded path to each of its neighbors. I'm glad to try to help with what you are doing. You can post more questions here or email me at info@clockworks-games.com.

That is true and unfortunate that Unity took them down. I am happy to help anyone who has purchased the NPC Populator and has a problem with this.

Have you tried the recommended animation clips from the Unity Standard Assets?

@@ClockworksGames No , I just got them off Mixamo. Where could I get unity standard assets from? Sorry in advance if this is a trivial question hahaha

@@michaelgeorge4524 I see that Unity has recently removed their Standard Assets from the Asset Store, unfortunately. I will look for a replacement. Unity has a new "Starter Asset - Third Person Character Controller" which has idle, walk, and run animation clips, but no turning. That could be used, but I will look to see whether there are any free clips available that include turning.

@@brionsarachan4500 yea without a proper set of animations, it doesn't work properly at all. Keep me updated if you have found anything that works please tell me

I was able to get my hands on animations that make it work and just mirrored all the animations to generate turning effects. The bigger problem I have now is that I cannot modulate the speed on the NPC at all. The NPC is constantly running, after applying the code which I know is part of Unity's make the agent follow the animation tutorial, changing agent speed does not do anything anymore. I want to force the patrolling of an area to be slower but it seems to not be possible after making the speed of the agent be animation based somehow

Thanks, I will reply to you via email.

Thank you very much!

I haven't tried Mixamo animations but would like to understand this better. Can you tell me specifically what animation clips you used?

@@ClockworksGames Sure thing, as I cannot link you the exact animation it is called "Rifle Run" and it is the version where the character is not pointing the rile ahead. They are holding it down and it is moving back and forth. It is the 3rd option when I search for "Rifle Run". Let me know if you want to make sure you have the right one.

@@ChadGatling Ok, I think I've found and downloaded the correct Rifle Run animation. What other animation clips are you blending this with? Are you using Mixamo animations for idle / walk / turn ? (You can also email me at info@clockworks-games.com if you prefer to communicate through direct email.)

Thanks for the feedback!

I'm glad that the video was helpful!

That certainly seems way too long to generate the NavMesh! Have you tried this without duplicating the city to see if that works? For me, the NavMesh generation only took a few minutes. I am unfortunately not an expert on why NavMesh generation would take so long. I think a reasonable next step would be to see how it works with a smaller environment. Perhaps you could also post on the Unity AI & Navigation forum.

@@ClockworksGames Thank you for trying to help! I have figured it out now after looking at some forums and it had something to do with the agent radius, or voxel count or something Like that. Not sure what the cause was exactly but I fixed it Thank you for trying to help and making a great video! Your tutorial helped me to understand different layers and get agents moving correctly I was just stuck with the baking, so again thank you and you have earned a subscriber!

@@autumnleafgames Great! I'm glad you were able to find the solution!

@@ClockworksGames Me too!

There is a function called SetModel() which is supposed to change the model at runtime. I have not used it much, but it is used in the WallJump example environment. I have a use for SetModel() in mind but haven't yet gotten to the point of using it. If you learn any more about it, I would be glad to hear about it.

I made a video a while ago that shows some examples: ruclips.net/video/u5zRmqZ0C0M/видео.html. Unfortunately, these change over time. The Autodesk Character Generator mentioned in the video is no longer freely available. My own NPC Populator asset comes with a small collection of character models, if that is of interest. u3d.as/TsW If you look in the Asset Store under 3D -> Characters -> Humanoid, there are over 4000 assets! Most of the newer ones should be compatible with animation clips, etc.

Thanks for sharing this approach! Do you have any foot sliding in your animation?

@@ClockworksGames In this approach, the forward pace is driven by the root motion of the walk/run clip, so there is no foot sliding. I did get my simplified approach to work under test circumstances, but it turns out that it's not the right way because the navmesh still controls the rotational steering while the forward motion is driven by the root motion of the animation. What can happen is the character will seem to get lost if the navmesh component is not keeping perfect pace with the character. For now I'm using a multiplier for the navmesh speed so that it can provide correct timing of the rotational steering. I'll probably implement the "recommended" approach later in my project.

@@StygianStyle Thanks for describing your approach. There are many ways to do all these things, and it often takes experimentation to find out what will work.

Glad that it could help!

The NPCs do pause at waypoints for a random amount of time. You can specify the minimum and maximum amount of time (number of frames) for the pause.

@@ClockworksGames great let me wishlist this for the upcoming sale

Thanks for this comment, and I agree there is a lot of expert knowledge required to make all the parts work together!

It looks OK to me: clockworks-games.com/. Can you tell me what you see, or if you are looking at a different site? Thanks!

​@@ClockworksGames The link in your video description ^ You need to update that because it goes to a malware-type site.

@@kbve Thanks for catching this! I switched domains from clockworks-games.blog to clockworks-games.com. It looks like the old one is bad. I will fix the description in the videos.

Thanks for the comment!

Thanks for the comment! Yes, I plan to continue this series. Unfortunately I've been busy with some other things lately and its been too long since I've put a new video. I need to get one out soon!

The complexity here is that both the animation system and the navigation system are trying to change the position of the agent, as explained in the video. In OnAnimatorMove() I actually have the reverse of your suggestion to keep the NavMeshAgent and the animated agent at the same position. What I show in the video worked best after a bunch of experiments that I tried, but there may be other good solutions to this problem as well.

Thank you for the comment!

Yes, one step at a time. :) And I do think there is a role for techniques besides ML; NavMesh is very nice.

Thank you!

Thanks for the comment! I've done a lot of experiments with different rewards and need to make another video soon!

Thanks for the comment! Glad you like the video!