AR Tracked Image Manager descriptor is null

Question

I'm working on an AR project that needs to add reference images during runtime

When I tried to do trackedImageManager.CreateRuntimeLibrary(), I got this error: "No image tracking subsystem found. This usually means image tracking is not supported."

So I check if the image manager supports mutable libraries with trackedImageManager.descriptor.supportsMutableLibrary

But it return an error that said trackedImageManager.descriptor is null

I tried to google why the descriptor is null but no answer for this

I also download the latest version of the AR Foundation Sample from Unity to see what I did wrong but the descriptor of AR Tracked Image Manager from that project also return null

I'm using:

AR Foundation version 4.1.9

AR Subsystems version 4.1.9

ARCore version 4.1.9

ARKit version 4.1.9

Answer 1

Best Answer

Answer by darkdragon241 · May 06 at 04:24 AM

In case anyone got this problem in the future

You will need to select the ARCore in the plugin settings. I'm using unity version 2019.4.20f1 but I think the later version may be the same or only different a little.

You will need to go to: File -> Build Settings -> Player Settings -> XR Plug-in Management -> Select the platform you are using (in my case it is Android) -> Check the ARCore plugin

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AR Tracked Image Manager descriptor is null

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