AR Foundation with Unity3d - Instantiating and Dragging Multiple Augmented Reality Objects

In this video I extend one of the existing scripts where I provided you with dragging functionality of a single AR Object, with this extension we can now instantiate multiple AR Objects in the scene, perform multiple Raycasts, and perform dragging on any of the Raycast collissions. The code also ensures that a place hasn’t been taken by another AR Object.
This video also uses some of the core AR components taught before such as:
- AR Custom Placement Controller with Dragging Functionality on multiple instantiated AR objects
- AR Session
- AR Session Origin
- AR Camera
- AR Plane Detection
- AR Raycasting
- AR Cloud Point Detection
- AR Lightweight Rendering Pipeline
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[@RepoTD]

Hey Dilmer, I'm having an issue, when I run the code with some prefabs that I made, the prefab starts to display on the screen on every update (You can imaging how many are there) and they display even if I don't touch on the screen. Can you please help me?

[@aguspray]

Thank you so much for your video tutorial, I have a question, why do you use both Physical.Raycast and ARManager.Raycast in this project? what if only used one of them? I think they do the same thing.

[@chamodweerasinghe8619]

Is there anyway we can save those prefabs under geo location to implement an indoor navigation system with AR foundation which can easily customize?

[@xavierstone5191]

I followed your instructions, but got different results, or did I do it wrong？

[@NirLouk]

Thanks. Can you link to your ordered video list? which one is the previous one that you did with only one object?.... you referring to it - but i can not find it in your many video titles.

[@Free4Game]

why is line 79 "lastSelectedObject==null" always true if we hit a plane? it somehow works and i dont know why. if you hit an object once, the lastselectedobject variable should not be null anymore and since we never set it to null manually the line 79 should always be false. but it somehow works.. really important pls help edit: i got it. its because line 57. if the ray does not hit something lastselectedobject is set to null. now line 79 is true.

[@edcutting]

Thanks for the video, exactly what I was looking for! Any tips on how to place different prefabs instead of placing the same prefab each time?

[@dilmerv]

Give me few hours and I will post a new video where I will implement a simple inventory with AR which will allow you to select different prefabs :) thanks for watching and for your suggestion !

[@edcutting]

@@dilmerv WOW!! Legend!! So impressed. Thank you so much!

[@jasonhayhurst8578]

Any advice on adapting this to show images over a cube from an array?

[@dilmerv]

All you would need to do is create a separate prefab where you have a cube and a carousel type implementation on a script that could change the image based on a timer on based on touches. If that’s kind of what you seek I can implement something like that for a new video.

[@cappacurta]

hello and thank you for the awesome tutorials! I got a pink screen on my iphone xs. On the xcode output I got this message "Shader is not supported on this GPU" Do you have any idea how to solve this? Thank you!

[@dilmerv]

Interesting what version of Unity and XCode are you using ?

[@chitrang7228]

thank you

[@dilmerv]

You are welcome !

[@facundofarall7716]

I don't quiet get what PlacementComponent is. Is it a Script component you add to the spheres you place?

[@Free4Game]

do you mean PlacementObject? its a script he already did. check his git repo. it should be there somewhere

[@jeyandranathsiddha637]

Can Please provide the link of previous video

[@dilmerv]

Did you watch this video from the playlist ?

[@andyward7961]

Hi Dilmer, thanks for the tutorial. I have followed your previous tutorial about selecting an object and about instantiating multiple objects. I am experiencing an error when instantiating multiple objects. As soon as i start my application, many objects are spawned as i look around with my phone even without pressing on the screen. I have tried to change a few things and have followed and double checked what you have included in your script however there is still an error. Thanks.

[@lasurbeampew]

Hey Andy! Hope this helps. I experienced the same problem as you. Look at the placedPrefab, make sure that the prefab contains Placement Object Script. Check Dilmer's GitHub on this. Really helped me learn. Hope this helps you!

[@alexmarasco3703]

@@lasurbeampew I am also experiencing this problem and I have no idea what you mean by this

[@andyward7961]

Hello, thanks for the tutorial. I have followed your previous tutorial about selecting an object and about instantiating multiple objects. I am experiencing an error when instantiating multiple objects. As soon as i start my application, many objects are spawned as i look around with my phone even without pressing on the screen. I have tried to change a few things and have followed and double checked what you have included in your script however there is still an error. Thanks.

[@RepoTD]

Did you check that your scene is clear on unity? If you have any objects there they will show on the App.

[@ebrahimkasaeyan8408]

I have same problem if you solved it let me know please

[@madrid090909]

hi, can you please tell me how to delete selected object and clear all objects using buttons.

[@dilmerv]

Sure I will make a video to show you !

[@madrid090909]

@@dilmerv thank you

[@rafaelladeia7278]

Thank you, Dilmer! I'm having a problem. For some reason, my code is not working. That is the exactly the same of yours, but with the difference that I'm ising the camera position to place the object, as I learned in yours previous classes.

[@dilmerv]

That’s interesting, normally that may mean you didn’t add the appropriate XR plugin, for instance for iOS add ARKit XR Plugin and for Android ARCore XR Plugin. Also what device are you currently using and version of Android OS ? Thanks for this info.

[@rafaelladeia7278]

@@dilmerv I'm using Android 9 in Samsung Galaxy 8. I was looking that probably my mistake is on the "PlacementObject" class...I could not understand how it exactly works at this context. Again, thank you so much for all this amazing contents!

[@rafaelladeia7278]

Dilmer, an updating...The code is working now! However, I got a new problem. When I move an object, after some seconds, it back to the original position. For some reason, the modifications in the object position is temporary.

[@AirWriting]

@@rafaelladeia7278 How did you solve the 'placementObject' issue? I think I'm having the same problem as you. If you know a solution, please teach me too. thank you

[@rafaelladeia7278]

@@AirWriting yes, I solved the problem but I dont remember precisely which was! Tell me your question, maybe I can help you!

[@gergelynemeth5168]

Hello, What is PlacementObject variable? I can't use it, my jetbrains rider say: "Cannot resolve symbol 'PlacementObject'". What can i do? I make app for android with, ARCore. Thats the problem? Thank you

[@dilmerv]

Did you download my code from GitHub ?

[@gergelynemeth5168]

@@dilmerv no i just make it my own

[@unownptcgo2183]

why i follow the second script, that you show but i cannot instantiating and dragging multiple AR objects?

[@dilmerv]

You should, this is just a demo of how I implemented at that time, you can extend it if you want to do multiple objects.

[@dannyloh409]

@@dilmerv i have follow eaxctly the same for few times, i even check the code one by one, and re-implement the scenes, can you check it again?

[@dannyloh409]

@@dilmerv i had try few times for this, even i follow exactly the same code and scene from github, still does not work as the video, can you check it one more time? thanks

[@libbywhitney]

Hi, where is the code for this video?

[@libbywhitney]

Hi, where is the code for this video please, I can't find it. Or can you give me a screenshot of the first 15 lines of code? This video can't show it

[@dilmerv]

Hello there, you can find all the scripts from this video here github.com/dilmerv/UnityARFoundationEssentials/tree/master/Assets/Scripts

[@libbywhitney]

@@dilmerv but I don’t know which one, and it said PlacementObject lack “using”,what should I do?

[@onuryldrm6845]

how do you delete the object you create

[@dilmerv]

You can do something similar of how I select it for dragging, just check if they are selected and if they are call Destroy on the ray hit game object.

[@onuryldrm6845]

@@dilmerv thank you so much

[@muhammadhamza3440]

will it work on Android?

[@dilmerv]

Try it ;)

[@shashankkamath2171]

hey man great vids.....but one question....do i need macbook for using ios support? also one suggestion....pls mention the basic requirements before every video

[@dilmerv]

That’s a good idea and thanks for your feedback. For this video you need a Mac if you want to support iOS or a windows machine / Mac for android.

[@shashankkamath2171]

Dilmer Valecillos ah i see...thanks a lot ...you are awesome and precise👍🏻

[@dilmerv]

You are very welcome :)

[@onuryldrm6845]

Hi github link is broken

[@dilmerv]

I fixed the link and here is the link just in case github.com/dilmerv/UnityARFoundationEssentials

[@onuryldrm6845]

@@dilmerv thank you so much

[@dilmerv]

You are more than welcome !!!

[@yensid46]

okay Dilmer this is where things get messy. In the beginning of this video you say you showed how to do dragging and dropping. In the previous two videos though The first one shows placing multiple objects on the screen when touching the plane. The second video in this playlist shows you how to select object on the screen through ray tracing. Even though in the introduction to the second video you say you are going to show how to place multiple objects. This is what is confusing me. Trying to follow what you are doing and talking about in this video is very difficult. You seem to be bouncing between several different scripts and the description is very vague as to what you are doing. It is very difficult to follow what you are attempting to do.

[@dilmerv]

Thank you for your time, I need to improve and your feedback is really important, I will apply your feedback in future videos.

[@andreidanciu4313]

Porfavor haz videos en español! te recomiendo a todos mis amigos

[@dilmerv]

Que tal Andrei si tengo pensado seguir con videos en español, dame algunas semanas y empezaré con ellos gracias !

[@andreidanciu4313]

@@dilmerv Muchísimas gracias, recomendado a todos mis compañeros desarrolladores y fantásticos tuyo, sigue así!