Beginners guide to UNITY AR Foundation (ARKit & ARCore) - Build your first AR app from scratch! 

Hey. I try to make this app and transfer the apk on phone. But the phone s camera don t start. Can you help me? Please

@@gabrielboiciuc2517 Is your phone supported and in developer mode?

@@MohdHamza following this! I think i'm having the same problem :( What's the phone you used in the video/ you have? :) Thanks in advance

@@drummsnikk5073 Hi, its a google pixel 2. Have you got a supported device ?

@@MohdHamza Read the ARCore list few minutes ago.. seems I don't have a supported device... i'm desperate ahah

i get this everytime - Manifest merger failed with multiple errors, see logs how to solve?

Thank you @Timha you saved my time

OMG.IT'S WORKING :))

Very helpful comment, this fixed my problem instantly!

Hello. I try to make this app and i have some problems. Can you help me?

Thanks you!!

Thank you so much :)

Sadly unity told that the camera variable is not assigned

@@solomon6957 is there any solution to that??

Glad you liked it😊

Whenever I do that (even with phone in developer mode etc) it doesn't build and run... If I unchecked it it will be just black screen or w.e. Is in the scene.

@@Blessindisguise sometimes the blackscreen is because you forgot to delete the main camera! i make tutorials too, come visit!

Glad it helped!

This module shall work on ARCore and ARKit supported devices. Don’t think it will work elsewhere.

@@MohdHamza you haven't added a camera to the Controller. The script tries to access it though, resulting in a null error. You don't handle this in the video. Any suggestions?

Hi Amey, Its the asset store where you will find these: assetstore.unity.com/packages/3d/characters/animals/insects/animated-spider-22986

Hi, Thanks for the comment. So this step can be skipped if you got the package versions correct while importing. The package versions I have written on screen as big white overlay text and also in the description box are the correct combination to use. I made a mistake while recording the video by downloading 4.1.1 versions of ARFoundation, ARKit and ARCore. So when I imported the correct version the focus mode and light estimaton had to be corrected. That's why I stressed on downloading the correct package version which I found out a bit later. Summary: If you stick with the package manager versions I mentioned in the description box you can use the default ARCamera gameobject without touching it and avoid doing what I did @14:29 Hope that helps✌️

Sure, can you share project details or perhaps screenshots of your project on the discord server (link in description)

It is very likely a semicolon or braces are missing somewhere. Try the script in the description box, hope that helps.

Please ensure you are using the same package versions as I have tested and mentioned in the description box. It also looks like the script has a method called at the wrong place. Check your script if it matches the one in the description. If any issues persist connect on the Discord server to share screenshots or media files.

@@MohdHamza I'm getting the same issue and I have all the right packages aND unity version. Whats you think the issue is?

@@macrowaves624 replied on discord!

@@MohdHamza I'am having the same error on play. How to solve?

I have the same problem

Thank you very much! All the best with your project 👍🏻

Can you share your project screenshots on discord (link in description), I think the placement indicator is not correctly created or the script injection didn't work.

Currently, I am wondering the same. Did you manage to find a answer?

Hi, If you are seeing the indicator then I believe you haven’t done anything wrong. The time taken for the indicator depends on your device ability to scan a plane surface while mapping it and also the texture of the surface you are scanning, so a coloured textured will be scanned quicker than a white one.

Hi Paulo, Try using the AR Placement script in the description, if you face further problems and wish to share screenshots or files then you can use the discord server invite link in the description.

Hi, You can message me on discord (link in description)

Ensure your device has developer mode switched on, then plug your phone into your machine running Unity and follow from @13:30 for Android. For iOS devices, you can refer to this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RzmBnllRnh8.html from 25:53. He presents very clearly how to build through Xcode.

Hi, I hope that all the package versions and Unity versions are as per the video. If not, can you post log messages or screenshot on my Discord server (link in description).

This looks like some field is left empty as the gameobject cannot be referenced. Try checking the gameobject on which AR placement script is sitting. Check if any field is left empty.

I am also getting the same error did you fix it?

@@aravindnitt3403 No. but the errors reduced when i made the 'AR Camera' the made main camera.

@@aravindnitt3403 apparently it worked for me even with the errors.

I found problem with camera, hits array and raycast - ended up declaring a public camera variable, assigned it from unity, created the hits array in start and updated the indicator position in update, see below code using System.Runtime.CompilerServices; using System.Linq.Expressions; using System.Diagnostics; using System.Runtime.InteropServices; using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.XR.ARFoundation; using UnityEngine.EventSystems; using UnityEngine.XR.ARSubsystems; public class PlaceOnPlane : MonoBehaviour { private ARRaycastManager raycastManager; List hits; public Camera m_MainCamera; public GameObject placementIndicator; // Start is called before the first frame update void Start() { raycastManager = GetComponent(); hits = new List(); } // Update is called once per frame void Update() { if( !m_MainCamera.enabled ){ UnityEngine.Debug.Log("Camera is not enabled, returning"); return; } var screenCenter = m_MainCamera.ViewportToScreenPoint(new Vector3(0.5f, 0.5f)); UnityEngine.Debug.Log("ViewportToScreenPoint converted"); if( !raycastManager.Raycast(screenCenter, hits) ){ UnityEngine.Debug.Log("Raycast manager failed"); } placementIndicator.SetActive(true); Pose pose = hits[0].pose; UnityEngine.Debug.Log("Set the marker position now"); placementIndicator.transform.SetPositionAndRotation(pose.position, pose.rotation); UnityEngine.Debug.Log("Marker position set"); } }

Did you know the solution?

Hi, This clearly sounds like script error. I have attached a link to the script in the description box. Paste the script and then check. If the error persists share some screenshots of your problem on Discord(link in description)

On the top ribbon go to Windows -> Animation -> Animator. The animator window should show up.

Hi Arzita, I think with your Unity version AR Packages version 4.0 and above are more compatible. Another thing you can possibly check is if you have got all the components correctly setup like the AR Raycast manager, select ARCore or ARKit (depending on platform) in Project Settings -> XR Plugins and other bits.

@@MohdHamza Thanks for your quick reply, Yes I have selected correct everything, followed every step of yours, still not happening..

@@AS-dn3wc Can you share screenshots on discord (link in description) of your project and player settings (especially the other settings) and XR plug-in management.

@@MohdHamza hi! I'm facing the exact same issue. Just a black screen on my phone

@@SrilalithaRavuri Hi, Many people have resolved them on my discord server, if you join that (link in description) you can read though the chats. There is no one way of resolving it. It can be due to multiple factors.

This tutorial is for iOS and Android devices. I think for browsers you might be looking into using WebGL build. AR in WebGL is something I have personally not done before.

Hi, can you share more details about the package versions, unity version, device details, and possibly a few screenshots on discord (link in description) of the console if you get errors.

@@MohdHamza sure, texted you on #general, would be great if you could check and help me out

Hi, this is markerless, a marker based would be something like this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OwpRSF7X9sI.html

Can you share your project screenshots on discord channel.

@@MohdHamza I am also getting the same error. Could you please help me in that, if you understood the problem. Thanks in advance

@@rajatgupta8339 Hi Rajat, This error usually pops up when a certain gameobject is not found and the script is trying to access it. Can you share screenshots of your scene to better understand your issues. Sometimes its small things we miss out.

I think you have to add the component "ARRaycastManager" to your Controller gameObject to make this code work.

@@ohhhinc7770 Added on AR Session Origin Gameobject, check @4:47

There can be multiple reasons to it. Could be versions, device or other settings. Can you share more details about your project. If you wish to share screenshots you are welcome to do so in my discord server (link in description)

Its the version issue. Try following this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DO2_PPjs1f4.html avoid the render pipeline bit, just use the script. Should work on 2020.3

Hi, Can you check if your device is listed here: developers.google.com/ar/devices If not then I'm afraid it won’t work. If your device is listed then please connect with me on my discord server(link in description).

@@MohdHamza ok thank you

The script has been the same. Can you show screenshots of your log or the error message in the discord server (link in description)

There can be a lot of reasons for it. First check your phone is on Developer's mode. Then check all the package versions and unity versions are in line. Hope your device is compatible with ARCore. Let me know in more detail. Hope it works!

Can you please recheck your AR Session Origin gameobject, has it got a camera in it. Can you also check the AR Placement script has no empty field left. Check the ARCamera has all scripts as in the video. Let me know how it goes.

@@MohdHamza Thanks for helping. I still get the error and the app doesn't show my phones camera

@@dylanr0662 Is there a way I can see your project?

@@MohdHamza you got discord I can message you pictures or videos

@@dylanr0662 ​ Sorry I haven't got discord servers set up yet. Looks like I will be needing one soon. In the meantime can you share your project using google drive on my email address in the about section of this channel?

Hi Anang, I have discussed scaling and rotating using sliders in this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-43XRkmAmscM.html Scaling by touch is discussed here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ISBIu6Jzfk8.html I haven’t built drag functions yet but will do so in the future.

Thank you ...but how to rotate and drag with finger touch on screen only

Can you provide more details or perhaps send some screenshots of your project on discord channel (link in description)?

@@MohdHamza sorry, i done, I made mistake in script~

Hi, This might help: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0SuzwJfqgBY.html

@@MohdHamza oh thank you!

Sure, create an empty gameobject and make this asset a child of the empty. Then scale your empty gameobject as you desire and counter it by scaling the asset. Hope that works✌️

@@MohdHamza Hi, thank you for the reply. I made an empty object as parent and scaled it to 20, 20, 20 and made the child assets as 0.05, 0.05, 0.05. However, everything was too large in the build. Do I need to adjust the AR camera or something?

@@jz9991z scale of 20 does sound large. I believe you need to make the child objects scale to 0.005. Or make the parent scale as 2 and keep children at 0.05. I would advise not to touch the AR Camera in this case.

@@MohdHamza Cheers. Thanks for your help

Sure, will be making one soon.

Can you share more details about your project, Unity version, package versions used etc in the discord channel using screenshots? Will be easier to look into it.

Great to hear that! In regards to your question first thing which comes to my mind is create a UI button which can do SceneManager.LoadScene(“Your scene”); This will reset the scene and work without closing and opening it again.

​@@MohdHamza Dear Sir, if you could help me alittle bit with the code with this button i would be appreciate. i should create a button and reload the scene like you said. so where should i write the code that relate to write my scene and connected to the button to reload it. THe code i have sofar is the same like you did in the video. it is for animating a robot exported from SW in AR. and everything working perfectly except this one. Thanks in advance

@@Medo1549 If you don't mind can you please post your issue with screenshots in the discord server (link in description). I can understand and reply better there. Thanks

Never tried that honestly mate. I have tried building AR apps using Swift and xcode for iOS devices which didn't require Unity or AR Foundation. There should be something similar for Android studio.

It works in 2019.2 and 2020.1, I have not tested others so honestly can't confirm.

@@MohdHamza Thank you so much. I guess I have to install that version. Also do you know how to use Vuforia?

@@MrDestinyproduction Yes I have used Vuforia in the past, however I'm more into ARFoundation as of late.

@@MohdHamza oh ok cos I’m having trouble putting my Vuforia application into my iPhone.

@@MrDestinyproduction Oh, honestly can't really help with Vuforia. Just did a quick search and found this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gIsz1tAMWVs.html Its for android and the language is different but may get what you want as his app was working.

This sounds like your device is incompatible. Devices which are listed here are compatible : developers.google.com/ar/devices

Can you please check the the editor version, AR packages versions are in line?

@@MohdHamza Unity 2020.2.4F1 AR Foundation 4.0.12 ARCore 4.0.12 but these are the latest versions then why such problems occurs

So the version I have used which reliably works is mentioned in the description box of this video. The latest versions do not necessarily work, they should be taken as reference alone. Consider this bit as a combination lock, you need the right combination to make it work. I know its not ideal but unfortunately it is how it works.

Hi, Try using the script docs.google.com/document/d/1z7xG20s7_jM7ftizfXexMd9b3ycYDfkBCPxUyRG3UNs/edit?usp=sharing . Should resolve your issue.

Hi, There can be a number of reasons for this, can you share more details about the package versions, unity version, device details, and possibly a few screenshots on discord (link in description) of the console if you get errors.

@@MohdHamza unity version is 2020.3.7f1 and I think I solved black screen problem by checking ARcore in setting, but when starts it, camera view is gone and froze I might try again and if not working, I will share it through discord. Thanks for your reply!! :)

This sounds like the AR Session is not running, can you share screenshots of your project and AR package versions you used in the discord channel?

@@MohdHamza oh okay I see yes I will do that later.

@@MohdHamza I just messaged you like 5 screenshots on Discord. Hopefully it helps!

@@Blessindisguise Replied.

can u tell me the fix?@@MohdHamza

Have you checked the fields are not empty in the inspector where you placed the AR placement script?

i made a couple of changes to be able to spawn multiple spiders and changed the camera from current to main too

Try this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0SuzwJfqgBY.html

This could be because of a few reasons. Check that your placement indicator gameobject has a quad as a child. Additionally it should be inserted in ARplacement script. Hope that works.

Yes I checked all of them multiple times, it doesn't work :( I have a quad and I have placed the placement indicator as one of the game objects for the script

Actually i figured it out, it was a very dumb error. I forgot to import the raycast and planemanager scripts

@@rithik4293 Oh great, glad it worked!

Thank you :)

Use the link in the description, sign in with your Unity credentials. In the editor in the package manager download first and then import. Should be straightforward.

@@MohdHamza it worked. Thanks for the reply.

Thanks for your appreciation!

Hi Mehul, I assume what you are trying is not to hide the placement indicator and spawn more objects when taped on the indicator. You could actually modify the code: using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.XR.ARFoundation; using UnityEngine.XR.ARSubsystems; public class ARPlacement : MonoBehaviour { public GameObject arObjectToSpawn; public GameObject placementIndicator; // private GameObject spawnedObject; private Pose PlacementPose; private ARRaycastManager aRRaycastManager; private bool placementPoseIsValid = false; void Start() { aRRaycastManager = FindObjectOfType(); } // need to update placement indicator, placement pose and spawn void Update() { if(placementPoseIsValid && Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) { ARPlaceObject(); } UpdatePlacementPose(); UpdatePlacementIndicator(); } void UpdatePlacementIndicator() { if(placementPoseIsValid) { placementIndicator.SetActive(true); placementIndicator.transform.SetPositionAndRotation(PlacementPose.position, PlacementPose.rotation); } else { placementIndicator.SetActive(false); } } void UpdatePlacementPose() { var screenCenter = Camera.current.ViewportToScreenPoint(new Vector3(0.5f, 0.5f)); var hits = new List(); aRRaycastManager.Raycast(screenCenter, hits, TrackableType.Planes); placementPoseIsValid = hits.Count > 0; if(placementPoseIsValid) { PlacementPose = hits[0].pose; } } void ARPlaceObject() { Instantiate(arObjectToSpawn, PlacementPose.position, PlacementPose.rotation); } } // I have used a notepad to edit the script. But hope this works.

​@@MohdHamza thank you so much, for this script, this helps me a lot in my AR project. One more thing is that by using this script we can generate multiple objects. Is it possible to spawn only one object? I mean that suppose first I spawn the object and after that, I have changed my camera angle and again I want to spawn the object then the previous one got destroyed and at a new place, it spawns again. So on a whole screen, only one object will be there not many. Thankyou again... :)

Thanks for the appreciation!

Replied

Hi Paulo, Great to hear that. Best of luck ahead!!

@@MohdHamza hello sir, can i ask if you have other projects that can I learn from?

@@paulogarduque324 At the moment you can follow the playlist. I haven’t uploaded any other projects on public platforms yet.

@@MohdHamza thank you so much sir :D

Thanks 😊

Thank you for the comment, please find the link in the description :}

So as shown in this case, if you’re using Android plug your phone into your computer, follow from @13:25. Make sure your mobile device has developer mode activated. The app should build up on your phone. Hope it works👍

@@MohdHamza Can you give a tutorial on how to build it through xcode

@@kayajones9215 : I can't create a tutorial at the moment however you can refer to this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RzmBnllRnh8.html from 25:53. He presents very clearly how to build through Xcode.

Yeah, should have done from the beginning. Will create a repository soon!

Mine is not working...a lot of error in mine

@@SatyamSingh-vd1xk Hi Satyam, I'll try creating a Github repository later. In the meantime can you list what errors are you getting?

Hi, there can be multiple reasons for this. Can you please explain a little more, perhaps showing your console if you got errors. Further you can post screenshots on Discord(link in description) to illustrate the issue.

Dude I tried it like yesterday and Vuforia said nah:/

Please could you explain the issue?

@@MohdHamza I deleted the project. The error was with the script file that you wrote and the phone screen was simply black.

Thanks 😊

Thank you for the comment, I have added the link in the description!

😂