In this video, we improve the image tracking functionality by allowing for multiple images to be tracked and specifying which prefab to spawn depending on the image that has been tracked.
hello @Dev Enabled i want to ask how to stabilized the image tracking so that the object spawn should stay on its place and should not move up and down
Great video this really helped me, i was getting an error and had to change trackedImage.name to trackedImage.referenceImage.name also when you set the postion in the updateImage function i also added Quaternion rotation = trackedImage.transform.rotation; then applied that to the prefab, again thank you for a great starter video i may expand on this further and post some videos in the future
Do you have a solution to delete the prefab when tracking state is none? There are a couple of us who seem not to be able to figure this out I think. The prefabs always stay as soon as they have been tracked.
in the Awake function i changed spawnedPrefabs[prefab.name].SetActive(false); to spawnedPrefabs[prefab.name].gameObject.SetActive(false); and it turned off after spawning
@@serendelmacphereson3388 This works for the first time when you switch from first tracked image to second. The first model disappears and the second 3D model corresponding to that tracked image appears but try switching back to the first image again and it wont show you the corresponding model. Was it the case with you too? Are you getting what I am trying to say? If yes then how did you solve it? Also thanks in advance.
@@aboodriazy3387 i did yes, i found a small and easy script that works very fine with multiple objects, unfortunatly on my very own project I'm still figuring out how to implement it. here it is github.com/darshanpv/DigiCard
Thanks for taking time to make this. You make great content but for some reason this is the only one I am having trouble with, and it looks like a few others are in the same position. My models appear when the image target comes into view as it should, but they stay visible when the image is taken away. I can turn away from the object then turn back and it is still there without the image target. Are there any other ways to ensure the model is deactivated when the image target is not in view? I have double checked my code is identical to yours. I double checked prefab and reference image library names are identical, and have followed your video guides from the beginning in case I missed anything. Anything helps, thanks.
Just a hypothetical: I would put a collider or trigger box onto the camera, and one on the image-tracked prefab. The collider/trigger box on the camera would maybe be as big as the FOV of the camera. On the image-tracked prefab, I'd add a script with OnTriggerExit, so that once the prefab exits your FOV, the prefab is SetActive(false), and isn't set active again until the image is once again recognized.
I had the issue that only the 3d model of the last tracked image target was displayed. Deleting these lines of code solved the problem: ""foreach(GameObject go in spawnedPrefabValues){if(go.name != name){go.setActive(false);}} Maybe that helps you guys too
Hello, thank you for this amazing tutorial. Only problem for me is after the second prefab I instantiate whether its the first image's prefab or second image's prefab, they are correctly popping and disabling the previous prefab, but then when I show the first I showed again, it doesnt hide the prefab of the second one I show and the prefab is not instantiating at all. Why is it? Basically the image Ive already showed and successfully instantiated the prefab, once it sees another image and instantiates another prefab, doesnt recognize that first image once more. This is a bug? If it is, this is a MAJOR bug
@@kevingrandez8556 I couldnt find a way around it, no solution on the internet, I tried to code myself but still no luck. Hope the video owner recognizes this problem
I just wanted to catch you while you have a new upload. I just discovered your channel, and I am following along on your C++ UE4 tutorials from a year ago. Being a beginner C++ programmer, I wanted to say thank you, as getting a good teacher for UE4 with C++ is a rare thing on TH-cam. You helped me get over wanting to use strictly C++ in my project, as I thought it would be beneficial, and start to appreciate blueprints more. So again, thank you for these tutorials, and I hope you continue those types of tutorials in the future. The augmentation and VR stuff isn't up my alley just yet, but I wish you the best on those videos as well. I will be watching your channel closely!
Thanks, Matthew. Great to hear the content has proven useful. If anything comes to mind in the future feel free to post a comment even on the older videos, I'll still get a notification and I try to reply to any comment that is readable. I actually had some more C++ content planned, I just need some time to concept the structure of it and what to cover. I can appreciate your AR/VR comment. Personally, I find AR quite interesting as it's so accessible and could have a lot of fun implementations at some point, I've always considered the prospect of scanning a board or tabletop and having a card game like MTG or a board game just loaded in front of you, saving so much setup and cost would be great. I'm not a huge fan of VR myself but I've worked with it in a professional sense for so many years I figured I could at least share my knowledge on it for people who do enjoy it.
Hi, great video, just having some issues the first object spawn remains as the only one tracked so if the first image I see is for Object A I get Object A but to see Object B I need to close the app and show the image for Object B, Im not getting rotation tracked just position, also aren´t objects supposed to get killed once the image is not on camera ?
Hey great video! Do you think it would be possible to enable/disable buttons using the image manager/reference library? I want to create a catalog of objects that are placeable on a plane but I want the user to scan an image first before they get access to it. Thanks !
Hi Dev Enabled, Please, I got this error after finishing the script ''SpwanedPrefabs does not exist in the current context''. What about the script of SpwanObject as I see in your video?! Thanks for your help!
'ARTrackedImageManager' does not contain a definition for 'trackedImageschanged' and no accessible extension method 'trackedImageschanged' i am getting this error
so my guess is that usually for AR, because objects in AR are in real physical space, a scale of 1 unit in Unity corresponds to 1 meter in real space, so a scale of .1 scales it down so that it doesnt overtake the screen. i am making tutorials on AR and try to be as clear as possible if you are interested!
For this project, can change the prefab which will spawn right?, like a video instead of that coffee and phone, I have a school project assigned to me about tracking image and play video, Can I apply it this way? Hope you reply me!
Its working but after scanning the second image, it does not go away. and even after that, the prefab file stays on the mobile screen even if i am trying to scan the first image. when i can the second image again, it repositions itself at the center. it seems like either the image that i am tracking is not good enough, or the code has some errors
Nice example code for multiple image tracking. But I would suggest to link the image name to the prefab in a dedicated data class. But other than that, it's really useful.
Hi, I am trying to build an AR app using ARCore in Unity. I have ten images and ten URL links to websites; I need to link the ten images with those ten URL links. Simply, when I scan the image with the phone's camera, I want the URL to open directly. Could you help me by explaining how can I do that?
Hi bro, I have a problem with my project. When I scan my augmented reality markers my prefabs appear at 0,0,0 coordinates. I have not been able to solve this problem for 3 weeks. I really appreciate your help.
Guys, not sure this helps here as well but with my code I needed to make the prefab a child of an empty game object and only then was able to change any transformations
It is possible to have the overlaid image being a user controlled animation. Fx. a finished animation that is divided in steps and then "played" by user pressing a button or simply tapping the screen?
Is there ways to make it trackfaster? Im not sure if its my old iPhone 6 or what but it doesn't track well. Stutters at best. ANy tips would be appreciated thanks!
Hi, great video, Thanks! I'm trying to track multiple images like in this video, but instead of 3D models, I wanna add videos. Once the video starts, it goes on playing till the end of the video, even if the camera is not pointed towards the tracked image. Does anyone have an idea? (without Vuforia plz.)
I think, if you make AR session origin and image tracking gameobject child of another game object and make it a prefab, then assetbundle, it can be shared.
@Dev Enabled thanks for the videos. they are the best and most current for ARFoundation that i have seen. would you mind sharing the extensions you use for Visual Studio Code for Unity/ARFoundation development?
I wanted to know regarding ARTrackedImagesChangedEventArgs.removed, even if I create a foreach loop it's like it doesn't work. The cycle works like this: foreach (ARTrackedImage trackedImage in eventArgs.removed) { _instantiatedPrefabs [trackedImage.referenceImage.name] .SetActive (false); } , is it an ARCore bug or am I not getting it very well. To summarize, did you also have problems with the .removed property, when using it with ARCore?
Hi there! Awesome video! Unfortunately, I'm having the same problem as mavc18 . My objects are spawning before the marker is visible and not spawning on the marker at all. I have absolutely disabled them from spawning in the "tracked images prefab" (it's set to "None [Game Object]"), so that's not it. I've quadruple checked our scripts, and they seem identical. Prefabs and images have identical names. Images are 2D. I cannot for the life of me figure out what's going on. :( I'm using a Pixel 3A and Unity 2019.3.7.
Update! They are finding the markers now! (I had accidentally set the ref image size to 5 metres instead of 0.5. Oops!) The images are still spawning upon launch, though, even though I have the tracked images prefab set to "none." I had this same problem with another tutorial, so I'm wondering if it's a Unity bug or a weird Android thing.
Check the full comment thread by mavc18 as he mentions what he'd overlooked and has resolved it. If it sounds like the same issue then hopefully the solution will be the same for you.
@@DevEnabled After four hours I finally figured it out! Tiny coding typo that Unity didn't pick up in its error log. :) All good. Thanks again. Excellent tutorial!!
@@DevEnabled Ahh, I thought I had fixed it, but it seems not. When I changed one of the prefabs I was using, the problem came back. Again, the "Tracked Image Prefab" is set to "none." I haven't overlooked it--in fact, I've even tried switching it to a prefab, running the app, and then switching it back to "none." The problem persists. I haven't touched the code, only which prefabs I'm using. It is the strangest problem I have ever encountered. The floating objects do disappear once the camera finds a marker, but that isn't really a solution. I've Googled the problem to no avail. Just one of those things, I guess.
@@Lemonlimed Hey, I'm not too sure why people are struggling with this concept and I always like to see people getting an understanding of what's going on. If you're new to Unity you might want to go over some of the official intro tutorials rather than jumping headfirst into AR? As for this example, on Awake() we're creating all of the objects before the image is ever tracked which is most likely why you're seeing them by default. In this example I have purposely set their default scale to Vector3.zero, meaning they're there, but can't be seen. We then toggle and update their visibility when the images are tracked based on their scale. That would also explain why the "floating objects" disappear when the camera finds the marker. Sounds like you've spawned the objects but not hidden them by overriding the scale and the scale is then being updated and hiding them properly when you track the image.
I was having trouble switching between two images. The game object doesnt go away when I move the image out of the camera view and the new image doesn't trigger the different game object. Is there a solution for this??
i have the same problem. i read that eventargs.removed it is not called when the image goes out of the cam, so you need to use another reference, like trackedimage.trackingstate. but i try this one and i have problem when i switch multiple times between images.
@@jorgitomuxamarcha I didn't find a solution, but I did put a "refresh" button that reloads the scene. So, the user can clear the screen for the next image.
@@lovesterposey5109 i finally gets a solution. I use the update event and i check de status of the images individually using an if. When the status change to limited means that the image is not in the camera vision.
Thanks for the info @jorge garcia montaño and @Lovester Posey. I am running into the same issue with the game object. @jorge garcia montaño do you have an example or reference that you used to fix this issue or what code was used for update event for each individual image? Any extra information would be appreciated, thanks.
Definitely, you'd just need to mix and match the tracking logic and perhaps do something like in this video where we remove the default prefab so nothing is spawned automatically. You likely want some kind of custom TrackingManger class to track which image has been tracked from imageManager and if a plane has been tracked from PlaneManager then allow spawning an object on the plane based on which image is tracked.
hi! I have an issue with the rotation of the instantiated prefab. If I, for example, instantiate a cube, it won't stick to the image with a face but it's placed diagonally instead. How do I manage to set the object to be perpendicular with the image? Thank you
@@Alex-uj2tz Just say that the orientation of your object is equal to that of your image marker. (you know GO.transform.rotation = marker.trasnform.rotation)
@Matthieu Poyade Thanks for the details, though I don't do alot of programming etc., this may be a silly question but I must ask, in which section of the script does the "GO.transform.rotation = marker.transform.rotation" need to be placed in? Thanks and take care.
Hi, in my case, the phone don't place my prefab in the image that I've chosen to be my target and my prefab begin to float when I start the applications, someone can help me?
For this tutorial, I think it would be beneficial to post the code for the C# code/script somewhere, like the description from example. I think it would help out those of us who are learning a little bit more.
😅 You mean for those that can't be bothered to type it themselves? As everything used in the build is covered in the tutorial. Unfortunately, I don't have the project any longer so the only place the code remains is in the video. Sorry about that.
@@DevEnabled I typed it in. I guess I saw your point. On a sidenote, the script doesn't give me the "Placeable Prefabs" option after adding it to the "AR Session Origin." Do you know why this would happen?
I have been successful in the past, but now I don't know why as long as the program is opened, it will display all the prefabs, which is completely impossible to solve...
Hello I am encountering the same problem as many other users over here. Ideally as you switch between the tracked image the corresponding 3D model should be displayed. But here you have to close the app and restart it . Have you figured out a way to solve it yet? Or if you could point my in some direction to resolve it. Thanks in advance.
I have everything the same in the code but can't recognize 2 separate images, I have to close the aplication and open again to scan the other one, and also both are upside down, please help!!!
Hi thank you for you video! Currently I'm using Vuforia to build my AR App. I have modified the DefaultTrackableEventHandler script to play audio when the image target is tracked and it works good for me. However, I'm come across with problem of looping the audio with 5 seconds interval. Your help will be much appreciated, thank you! var audioComponents = mTrackableBehaviour.GetComponentsInChildren(true); foreach (var component in audioComponents) { component.enabled = true; component.loop = true; }
hi i'm new dev. i trying make a project that can be track one image and show multi ar-image corresponding. this is done by button next and back to change ar-image. your turtorial is one picture - one ar-image i want one picture - muilti ar-image Ex. i have a pictute " car" . i want button left and right ( back and next ) to change multi ar-image car 3d model Can you help me pls?
Because we spawn the possible objects and pool them for use when the image is found at the start of the script. I'm guessing you missed the part of the video where we disable them.
@@DevEnabled no, i've had review all tutorial many times and the script where you dissable at start. Maybe some is wrong with my Unity 2019.3.1 or package but are the same like yours. Thanks to answers me.
Hey, sorry I've had a bit too much to manage recently so I've started only uploading in-progress projects on my Patreon page. I'm now only sharing projects publicly that I don't cover as a tutorial such as the let's create content.
@@DevEnabled Oh I see , thanks . Ive tried to replicate this method but Im playing with the settings of it cause the prefabs are instantiated at start and will work on it to see if I can use this apprioach . Thanks for your content is very inspiring and clear
@@carlocattano5981 Assets\ImageTracking.cs(12,26): warning CS0649: Field 'ImageTracking.placeablePrefabs' is never assigned to, and will always have its default value null Do you know why is this is error? I've done right everything.
After making the script, and applying it to the AR Session Origin, there are no parameters for me to alter on the script component? I also get three errors, and don't know how to fix them: - Assets\Scripts\ImageTracking.cs(11,25): warning CS0649: Field 'ImageTracking.placeablePrefabs' is never assigned to, and will always have its default value null - Assets\Scripts\ImageTracking.cs(23,81): error CS0117: 'Quaternion' does not contain a definition for 'indentity' - Assets\Scripts\ImageTracking.cs(23,36): error CS0103: The name 'instantiate' does not exist in the current context CAn anyone help me?
Unity 2019.4.0 Package manager: AR Foundation Version 3.1.3 AR Subsystem Version 3.1.3 AR Core XR Plugin Version 3.1.3 Player Settings \ Other Settings \ Graphics API (select Vulkan and click on minus). If you still have an error = change one or all images inside ReferenceImageLibrary If you still have an error = Player Settings \ Other Settings \ API Level 26 or higher If you still have an error = Player Settings \ XR Settings \ uncheck ARCore Supported
Alex Ross exactly that one, I fill all fields but when i run the program is like the app does not detect any of them therefore it says the error I mentioned before.
Using "find object" is wasteful, as it searches the scene, and you can just "get component" instead, as it is guaranteed to be on the same Game Object by the "required component" tag. Otherwise, good video.
Yep, that's really the intended way to use it. As I mentioned it was only because I don't have access to a printer that I needed to get a little creative to get this working. If your images aren't working then you may have a problem in your code or the images might not be working very well as a pattern for the system to track.
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In this video, we improve the image tracking functionality by allowing for multiple images to be tracked and specifying which prefab to spawn depending on the image that has been tracked.
hello @Dev Enabled i want to ask how to stabilized the image tracking so that the object spawn should stay on its place and should not move up and down
@@charanjeetsinghjaswani5058 I've the same question
Hello, I would like to know how can I add interactivity like rotate, scale and select objects in AR foundation in image tracking mode.
Great video this really helped me, i was getting an error and had to change trackedImage.name to trackedImage.referenceImage.name also when you set the postion in the updateImage function i also added Quaternion rotation = trackedImage.transform.rotation; then applied that to the prefab, again thank you for a great starter video i may expand on this further and post some videos in the future
Do you have a solution to delete the prefab when tracking state is none? There are a couple of us who seem not to be able to figure this out I think. The prefabs always stay as soon as they have been tracked.
in the Awake function i changed spawnedPrefabs[prefab.name].SetActive(false); to spawnedPrefabs[prefab.name].gameObject.SetActive(false); and it turned off after spawning
@@serendelmacphereson3388 This works for the first time when you switch from first tracked image to second. The first model disappears and the second 3D model corresponding to that tracked image appears but try switching back to the first image again and it wont show you the corresponding model. Was it the case with you too? Are you getting what I am trying to say? If yes then how did you solve it? Also thanks in advance.
Any updates for the concern ? did you manage a solution ?
@@saadelyousfi9490 have you solved :/
@@aboodriazy3387 i did yes, i found a small and easy script that works very fine with multiple objects, unfortunatly on my very own project I'm still figuring out how to implement it. here it is github.com/darshanpv/DigiCard
Thanks for taking time to make this. You make great content but for some reason this is the only one I am having trouble with, and it looks like a few others are in the same position.
My models appear when the image target comes into view as it should, but they stay visible when the image is taken away. I can turn away from the object then turn back and it is still there without the image target. Are there any other ways to ensure the model is deactivated when the image target is not in view? I have double checked my code is identical to yours. I double checked prefab and reference image library names are identical, and have followed your video guides from the beginning in case I missed anything. Anything helps, thanks.
Did you solve it?
Just a hypothetical: I would put a collider or trigger box onto the camera, and one on the image-tracked prefab. The collider/trigger box on the camera would maybe be as big as the FOV of the camera. On the image-tracked prefab, I'd add a script with OnTriggerExit, so that once the prefab exits your FOV, the prefab is SetActive(false), and isn't set active again until the image is once again recognized.
I had the issue that only the 3d model of the last tracked image target was displayed. Deleting these lines of code solved the problem: ""foreach(GameObject go in spawnedPrefabValues){if(go.name != name){go.setActive(false);}} Maybe that helps you guys too
Thanks!
Both 3D models get shown in the scene when I do this
@@jodexcreates same were u able to fix it?
@@ronweasley5573 Did you fix it ?
Hello, thank you for this amazing tutorial. Only problem for me is after the second prefab I instantiate whether its the first image's prefab or second image's prefab, they are correctly popping and disabling the previous prefab, but then when I show the first I showed again, it doesnt hide the prefab of the second one I show and the prefab is not instantiating at all. Why is it? Basically the image Ive already showed and successfully instantiated the prefab, once it sees another image and instantiates another prefab, doesnt recognize that first image once more. This is a bug? If it is, this is a MAJOR bug
same here :(
@@kevingrandez8556 I couldnt find a way around it, no solution on the internet, I tried to code myself but still no luck. Hope the video owner recognizes this problem
I just wanted to catch you while you have a new upload. I just discovered your channel, and I am following along on your C++ UE4 tutorials from a year ago. Being a beginner C++ programmer, I wanted to say thank you, as getting a good teacher for UE4 with C++ is a rare thing on TH-cam. You helped me get over wanting to use strictly C++ in my project, as I thought it would be beneficial, and start to appreciate blueprints more. So again, thank you for these tutorials, and I hope you continue those types of tutorials in the future. The augmentation and VR stuff isn't up my alley just yet, but I wish you the best on those videos as well. I will be watching your channel closely!
Thanks, Matthew. Great to hear the content has proven useful. If anything comes to mind in the future feel free to post a comment even on the older videos, I'll still get a notification and I try to reply to any comment that is readable. I actually had some more C++ content planned, I just need some time to concept the structure of it and what to cover. I can appreciate your AR/VR comment. Personally, I find AR quite interesting as it's so accessible and could have a lot of fun implementations at some point, I've always considered the prospect of scanning a board or tabletop and having a card game like MTG or a board game just loaded in front of you, saving so much setup and cost would be great. I'm not a huge fan of VR myself but I've worked with it in a professional sense for so many years I figured I could at least share my knowledge on it for people who do enjoy it.
Thanks for the great tutorial, I faced an issue when the prefab was instantiated, I saw some drifting in the z-axis, how can I solve that.
Hi, great video, just having some issues the first object spawn remains as the only one tracked so if the first image I see is for Object A I get Object A but to see Object B I need to close the app and show the image for Object B, Im not getting rotation tracked just position, also aren´t objects supposed to get killed once the image is not on camera ?
i have same problem as you mentioned...have you solved it? please help.
@@kawerishirke5568 no.. I switched to EasyAR not free but way better tracking.
@@parsec3d Fine, Thank you for the response!!!
@@kawerishirke5568 Did you solve it?
@@manurajput5348 No.., I also switched to EasyAR.
Hey great video! Do you think it would be possible to enable/disable buttons using the image manager/reference library? I want to create a catalog of objects that are placeable on a plane but I want the user to scan an image first before they get access to it. Thanks !
Thanks for video! Have you tried adding ARAnchorManager to spawn GameObject with high accuracy? Would be nice tutorial..
Hi Dev Enabled,
Please, I got this error after finishing the script ''SpwanedPrefabs does not exist in the current context''. What about the script of SpwanObject as I see in your video?!
Thanks for your help!
⚠️CAN WE CREATE SOMETHING LIKE MULTI TARGET (vuforia) in AR Foundation????
Yes. Just use a bit of imagination.
'ARTrackedImageManager' does not contain a definition for 'trackedImageschanged' and no accessible extension method 'trackedImageschanged'
i am getting this error
You are probably missing a letter, that happend to me tho...
It is working only for the first switch, after the first switch the same object stays spawned. Am I doing something wrong?
How does the scaling work? Why are you setting the scale to 0.1? Thank you for clarifying!
so my guess is that usually for AR, because objects in AR are in real physical space, a scale of 1 unit in Unity corresponds to 1 meter in real space, so a scale of .1 scales it down so that it doesnt overtake the screen. i am making tutorials on AR and try to be as clear as possible if you are interested!
For this project, can change the prefab which will spawn right?, like a video instead of that coffee and phone, I have a school project assigned to me about tracking image and play video, Can I apply it this way?
Hope you reply me!
Its working but after scanning the second image, it does not go away.
and even after that, the prefab file stays on the mobile screen even if i am trying to scan the first image.
when i can the second image again, it repositions itself at the center.
it seems like either the image that i am tracking is not good enough, or the code has some errors
A build of this works on my Android device but not on my iPhone 12 Pro Max. Anyone find a solution for this?
Hello, I would like to know how can I add interactivity like rotate, scale and select objects in AR foundation in image tracking mode.
Thanks for the tutorial, Sir. Can I ask something? With AR Core can we do something like multitarget on Vuforia?
Yep, just add several Image Targets to the scene
Hero amongst men.
Nice example code for multiple image tracking. But I would suggest to link the image name to the prefab in a dedicated data class. But other than that, it's really useful.
Hi, I am trying to build an AR app using ARCore in Unity. I have ten images and ten URL links to websites; I need to link the ten images with those ten URL links. Simply, when I scan the image with the phone's camera, I want the URL to open directly. Could you help me by explaining how can I do that?
could you tell me why I got that error---The name 'prefab' does not exist in the current context? thank you so much
can we update the images to be tracked and the prefabs that needs to spawn from a database without the need of installing the new version of our app?
can we track the multiple object at the same time?
Hi bro, I have a problem with my project. When I scan my augmented reality markers my prefabs appear at 0,0,0 coordinates. I have not been able to solve this problem for 3 weeks. I really appreciate your help.
Actually the same problem for me. Would also appreciate some help :)
Guys, not sure this helps here as well but with my code I needed to make the prefab a child of an empty game object and only then was able to change any transformations
It is possible to have the overlaid image being a user controlled animation. Fx. a finished animation that is divided in steps and then "played" by user pressing a button or simply tapping the screen?
Yes, the animation just has to be in the prefab
Is there ways to make it trackfaster? Im not sure if its my old iPhone 6 or what but it doesn't track well. Stutters at best. ANy tips would be appreciated thanks!
What algorithm does AR Foundation uses?
Hi, great video, Thanks! I'm trying to track multiple images like in this video, but instead of 3D models, I wanna add videos. Once the video starts, it goes on playing till the end of the video, even if the camera is not pointed towards the tracked image. Does anyone have an idea? (without Vuforia plz.)
i might make a tutorial for this if the demand is high enough!
@@xrmasiso +1👍👏👏👏👏
@@xrmasiso do it please
@@kamelbakir6415 you got it! subscribe to my channel and stay tuned!
Hi,
Please, how can I use the application.OpenUrL function when the image is scanned in unity?
Can i do this without Vuforia?
i follow this tutorial but i get error to generated arcore and few other
Great tutorial! Is it possible to persist the reference image library, so that it could be shared? like Vuforia database
I think, if you make AR session origin and image tracking gameobject child of another game object and make it a prefab, then assetbundle, it can be shared.
@Dev Enabled thanks for the videos. they are the best and most current for ARFoundation that i have seen. would you mind sharing the extensions you use for Visual Studio Code for Unity/ARFoundation development?
What if I want to add an animation to the object? Can I export a .blend with an animation file? Or what doy you recommend me?
Yes, the animation just needs to be inside the prefab
I wanted to know regarding ARTrackedImagesChangedEventArgs.removed, even if I create a foreach loop it's like it doesn't work. The cycle works like this:
foreach
(ARTrackedImage trackedImage in eventArgs.removed)
{
_instantiatedPrefabs [trackedImage.referenceImage.name] .SetActive (false);
}
, is it an ARCore bug or am I not getting it very well. To summarize, did you also have problems with the .removed property, when using it with ARCore?
Hi Dev Enabled, Thank you for the tutorial. Does this work for Android?
i think you have your information by now, but yes, AR-Foundation is compatible with apple ARKit and google ARCore
is it possible to feed ReferenceImageLibrary remotely ? like download the images from remote server with the 3D prefabs to place
Hi there! Awesome video! Unfortunately, I'm having the same problem as mavc18
. My objects are spawning before the marker is visible and not spawning on the marker at all. I have absolutely disabled them from spawning in the "tracked images prefab" (it's set to "None [Game Object]"), so that's not it. I've quadruple checked our scripts, and they seem identical. Prefabs and images have identical names. Images are 2D. I cannot for the life of me figure out what's going on. :( I'm using a Pixel 3A and Unity 2019.3.7.
Update! They are finding the markers now! (I had accidentally set the ref image size to 5 metres instead of 0.5. Oops!) The images are still spawning upon launch, though, even though I have the tracked images prefab set to "none." I had this same problem with another tutorial, so I'm wondering if it's a Unity bug or a weird Android thing.
Check the full comment thread by mavc18 as he mentions what he'd overlooked and has resolved it. If it sounds like the same issue then hopefully the solution will be the same for you.
@@DevEnabled After four hours I finally figured it out! Tiny coding typo that Unity didn't pick up in its error log. :) All good. Thanks again. Excellent tutorial!!
@@DevEnabled Ahh, I thought I had fixed it, but it seems not. When I changed one of the prefabs I was using, the problem came back. Again, the "Tracked Image Prefab" is set to "none." I haven't overlooked it--in fact, I've even tried switching it to a prefab, running the app, and then switching it back to "none." The problem persists. I haven't touched the code, only which prefabs I'm using. It is the strangest problem I have ever encountered. The floating objects do disappear once the camera finds a marker, but that isn't really a solution. I've Googled the problem to no avail. Just one of those things, I guess.
@@Lemonlimed Hey, I'm not too sure why people are struggling with this concept and I always like to see people getting an understanding of what's going on. If you're new to Unity you might want to go over some of the official intro tutorials rather than jumping headfirst into AR? As for this example, on Awake() we're creating all of the objects before the image is ever tracked which is most likely why you're seeing them by default. In this example I have purposely set their default scale to Vector3.zero, meaning they're there, but can't be seen. We then toggle and update their visibility when the images are tracked based on their scale. That would also explain why the "floating objects" disappear when the camera finds the marker. Sounds like you've spawned the objects but not hidden them by overriding the scale and the scale is then being updated and hiding them properly when you track the image.
I was having trouble switching between two images. The game object doesnt go away when I move the image out of the camera view and the new image doesn't trigger the different game object. Is there a solution for this??
i have the same problem. i read that eventargs.removed it is not called when the image goes out of the cam, so you need to use another reference, like trackedimage.trackingstate. but i try this one and i have problem when i switch multiple times between images.
@@jorgitomuxamarcha I didn't find a solution, but I did put a "refresh" button that reloads the scene. So, the user can clear the screen for the next image.
@@lovesterposey5109 i finally gets a solution. I use the update event and i check de status of the images individually using an if. When the status change to limited means that the image is not in the camera vision.
Thanks for the info @jorge garcia montaño and @Lovester Posey. I am running into the same issue with the game object. @jorge garcia montaño do you have an example or reference that you used to fix this issue or what code was used for update event for each individual image? Any extra information would be appreciated, thanks.
@@jorgitomuxamarcha can you please help me how to do it? thanks
Imagine using this with a small device in order to spawn AR wearables. That would be cool.
Is it still possible though to use a flat 2d image as image target? Tried it but it doesn't work...
Is it possible to combine Plane Detection and Image Tracking? For example, have the prefab associated with the image spawned on a detected plane?
Definitely, you'd just need to mix and match the tracking logic and perhaps do something like in this video where we remove the default prefab so nothing is spawned automatically. You likely want some kind of custom TrackingManger class to track which image has been tracked from imageManager and if a plane has been tracked from PlaneManager then allow spawning an object on the plane based on which image is tracked.
@@DevEnabled Is there any video please? thank you
hi! I have an issue with the rotation of the instantiated prefab. If I, for example, instantiate a cube, it won't stick to the image with a face but it's placed diagonally instead. How do I manage to set the object to be perpendicular with the image? Thank you
I have had the same issue so I forced the rotation of the object to that of the trackedImage
@@Alex-uj2tz Just say that the orientation of your object is equal to that of your image marker. (you know GO.transform.rotation = marker.trasnform.rotation)
@@angusstardust thank you, this solved my problem too. Now looking at it, seems such an obvious solution...
@Matthieu Poyade Thanks for the details, though I don't do alot of programming etc., this may be a silly question but I must ask, in which section of the script does the "GO.transform.rotation = marker.transform.rotation" need to be placed in? Thanks and take care.
@@aquagnome1 here it is amigo:
private void UpdateImage(ARTrackedImage trackedImage)
{
string name = trackedImage.referenceImage.name;
Vector3 position = trackedImage.transform.position;
GameObject prefab = spawnedPrefabs[name];
prefab.transform.position = position;
prefab.SetActive(true);
foreach (GameObject go in spawnedPrefabs.Values)
{
*go.transform.rotation = trackedImage.transform.rotation;*
if (go.name != name)
{
go.SetActive(false);
}
}
}
Amazing tutorial thank you
Can AR foundation be used on windows with a webcam?
Just wondering if you are able to spawn different objects for the same image? Spawn whichever one is active.
hey, i've been looking for a solution to something like this, have u found anything?
Hi, in my case, the phone don't place my prefab in the image that I've chosen to be my target and my prefab begin to float when I start the applications, someone can help me?
Lovely video. Thank you so much
For this tutorial, I think it would be beneficial to post the code for the C# code/script somewhere, like the description from example. I think it would help out those of us who are learning a little bit more.
😅 You mean for those that can't be bothered to type it themselves? As everything used in the build is covered in the tutorial. Unfortunately, I don't have the project any longer so the only place the code remains is in the video. Sorry about that.
@@DevEnabled I typed it in. I guess I saw your point. On a sidenote, the script doesn't give me the "Placeable Prefabs" option after adding it to the "AR Session Origin." Do you know why this would happen?
Great! thanks for this great video 😁
I have been successful in the past, but now I don't know why as long as the program is opened, it will display all the prefabs, which is completely impossible to solve...
Hi, how to spawn different obj but with one image target using button?
Hello I am encountering the same problem as many other users over here. Ideally as you switch between the tracked image the corresponding 3D model should be displayed. But here you have to close the app and restart it . Have you figured out a way to solve it yet? Or if you could point my in some direction to resolve it. Thanks in advance.
did you solve the problem? Faced the same.
can i use qr code with ARcore??
May I know how the object can be rotating and zoom in/out? I want to implement each an object can be rotate and zoom in/out. Thank you
This helped me th-cam.com/video/KC0i5U1-1cc/w-d-xo.html
I have everything the same in the code but can't recognize 2 separate images, I have to close the aplication and open again to scan the other one, and also both are upside down, please help!!!
Did you solve it?
cant find this video project on the link in description, are another projects located.
I've not uploaded 100% of the projects unfortunately.
Thank you.
Hello, great video!
How to make model follow image rotation? TY
Hi thank you for you video! Currently I'm using Vuforia to build my AR App. I have modified the DefaultTrackableEventHandler script to play audio when the image target is tracked and it works good for me. However, I'm come across with problem of looping the audio with 5 seconds interval. Your help will be much appreciated, thank you!
var audioComponents = mTrackableBehaviour.GetComponentsInChildren(true);
foreach (var component in audioComponents)
{
component.enabled = true;
component.loop = true;
}
How do you get the app on the phone? I'm trying to develop an ar experience for the public.
my tutorial thats coming up explains step by step how to get it on the phone!
hi
i'm new dev. i trying make a project that can be track one image and show multi ar-image corresponding. this is done by button next and back to change ar-image.
your turtorial is one picture - one ar-image
i want one picture - muilti ar-image
Ex. i have a pictute " car" . i want button left and right ( back and next ) to change multi ar-image car 3d model
Can you help me pls?
I got a problem, when camera starts, the two objects appears in 0,0,0 position,,, why if i didnt found the marker yet? :( thank u again.
Because we spawn the possible objects and pool them for use when the image is found at the start of the script. I'm guessing you missed the part of the video where we disable them.
@@DevEnabled no, i've had review all tutorial many times and the script where you dissable at start. Maybe some is wrong with my Unity 2019.3.1 or package but are the same like yours. Thanks to answers me.
@@DevEnabled oh man , you are rigth!!!!, thank you so much!!! i just dissable the prefab and bum! :D
@@revotiva Yeah, it's usually something really simple that can get overlooked. Glad to hear you tracked it down.
@@DevEnabled spent 3 days! haha
Amazing stuff!
nice tutorial.... How can put a message "find a marker" and when find marker it text desapear, and apear when lose marker. thank great tuto :)
Thank you. Using a standard canvas setup should work for that.
I have a problem. First scan takes something about 5 -15 seconds, then it scans much faster. Anyone have solution for this ?
Solved the issue was in Ar foundation version.
great content !
Will this work for IOS or is this just for Android?
any chance you upload this project to the mega link ?
Hey, sorry I've had a bit too much to manage recently so I've started only uploading in-progress projects on my Patreon page. I'm now only sharing projects publicly that I don't cover as a tutorial such as the let's create content.
@@DevEnabled Oh I see , thanks . Ive tried to replicate this method but Im playing with the settings of it cause the prefabs are instantiated at start and will work on it to see if I can use this apprioach . Thanks for your content is very inspiring and clear
@@carlocattano5981 Assets\ImageTracking.cs(12,26): warning CS0649: Field 'ImageTracking.placeablePrefabs' is never assigned to, and will always have its default value null
Do you know why is this is error? I've done right everything.
@@SamirJzVFX is just a warning not an error⚠️
After making the script, and applying it to the AR Session Origin, there are no parameters for me to alter on the script component?
I also get three errors, and don't know how to fix them:
- Assets\Scripts\ImageTracking.cs(11,25): warning CS0649: Field 'ImageTracking.placeablePrefabs' is never assigned to, and will always have its default value null
- Assets\Scripts\ImageTracking.cs(23,81): error CS0117: 'Quaternion' does not contain a definition for 'indentity'
- Assets\Scripts\ImageTracking.cs(23,36): error CS0103: The name 'instantiate' does not exist in the current context
CAn anyone help me?
Unity 2019.4.0
Package manager:
AR Foundation Version 3.1.3
AR Subsystem Version 3.1.3
AR Core XR Plugin Version 3.1.3
Player Settings \ Other Settings \ Graphics API (select Vulkan and click on minus).
If you still have an error = change one or all images inside ReferenceImageLibrary
If you still have an error = Player Settings \ Other Settings \ API Level 26 or higher
If you still have an error = Player Settings \ XR Settings \ uncheck ARCore Supported
I have the same issue as you the .placeablePrefabs is never assignet to.
Did you find the solution?
Alex Ross exactly that one, I fill all fields but when i run the program is like the app does not detect any of them therefore it says the error I mentioned before.
@@artemtereshenkov9966 nevermind, i've just find my mistake xD
@@SamirJzVFX what was the mistake??
i need the C# Script
Great video! Next time please turn up the volume, we can't always hear you well. Thanks
hey dev enabled, I really need some urgent help please, thanks
NOt working
Using "find object" is wasteful, as it searches the scene, and you can just "get component" instead, as it is guaranteed to be on the same Game Object by the "required component" tag.
Otherwise, good video.
Hi I need code for SpawnObjectOnPlane.cs where can i get this?
Hello, I would like to know how can I add interactivity like rotate, scale and select objects in AR foundation in image tracking mode.
Is it still possible though to use a flat 2d image as image target? Tried it but it doesn't work...
Yep, that's really the intended way to use it. As I mentioned it was only because I don't have access to a printer that I needed to get a little creative to get this working. If your images aren't working then you may have a problem in your code or the images might not be working very well as a pattern for the system to track.
@@DevEnabled Ah! I see! I guess I have to try another image. Thank you for replying 👍
@@DevEnabled if the image I used has no star for target rating, will it still work?