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Question by Phanou · Nov 21, 2018 at 01:21 AM · androidaugmented-reality

ARCore, AddImage to AugmentedImageDatabase in runtime

Hello
I try to add image in runtime to my AugmentedImageDatabase.
I use the code below but nothing happen . In my code "camera" is my ARCoreSession.

 Texture2D tex = new Texture2D(2, 2);
 tex.LoadImage(asset.augmentedImage);
 camera.SessionConfig.AugmentedImageDatabase.AddImage("test", tex, 0);

Do you know if it's possible ?

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Answer by Phanou · Nov 21, 2018 at 08:32 AM

This is my complete class test :

 public class test : MonoBehaviour {
 
     public Sprite monimage;
     public ARCoreSession masession;
     public List<AugmentedImage> m_TempAugmentedImages = new List<AugmentedImage>();
 
     void Start ()
     {
         masession.SessionConfig.AugmentedImageDatabase.AddImage("test", monimage.texture, 0);
         Session.GetTrackables<AugmentedImage>(m_TempAugmentedImages, TrackableQueryFilter.Updated);
         Debug.Log(m_TempAugmentedImages.Count + " image in the AugmentedImageDatabase"); // ==0
     }
     
 }

Debug.Log print "0"

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avatar image Phanou · Nov 21, 2018 at 11:22 PM 0
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the problem come from "AddImage" in AugmentedImageDatabase.cs

Lifecycle$$anonymous$$anager.Instance.NativeSession is always null.

I don't understand what is NativeSession.

avatar image chc19 · Jun 20, 2019 at 03:10 PM 0
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did you manage to find a fix?

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Answer by KLoOonal · Mar 08, 2019 at 05:01 AM

I recommend you to test on android device not just instant preview but real android device.

I have faced this problem when I test in unity editor but it work perfectly on my android device. That because LifecycleManager.instance.NativeSession is always null in editor and that make AddImage() return -1 which is error.

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avatar image Phanou · Mar 11, 2019 at 03:47 PM 0
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Thx I will try :)

avatar image Phanou · May 27, 2019 at 09:43 PM 0
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It's don't work also on real android device. Any other Idea ?

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