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How can I have old extended tracking feature back instead of device tracker ?

October 19, 2018 - 6:58am #1


For a few month, the extended tracking feature on the image target has been replaced by the device tracking feature.

However, I am often in cases where the device tracker don't fit my purposes and I wish I could have the old extended feature back, with ARCamera's world center mode setting to "FIRST_TARGET".

Actually I have 2 issues with the device tracking feature :

- First, the image tracker must be at the sized defined in Unity Editor in order that the device tracker can work properly. However, sometimes my tracker can have several sizes. When it happens, the tracking is bad with device tracker.

- Moreover, the FIRST_TARGET setting is usefull when you want the world coordinate system and world center position be defined by your image tracker. It is not possible with device tracker because the world coordinate system is defined by the device.


It's too bad we can't get extended tracking with FIRST_TARGET setting anymore, because it worked well and it allowed us things that we can't do anymore using device tracker. For the moment, in my opinion Vuforia 7.1 was better than Vuforia 7.2 because we could use extended tracking with "FIRST_TARGET" setting on the ARCamera.

Is there something I can do to get the old extended tracking feature back (other than installing Vuforia 7.1) ?

Also I wanted to know if I was the only one complaining of the lack of the old extended tracking feature or if others members share this opinion.

Has Vuforia planned to have extended tracking feature availabled without device tracking in the future releases ?

PS : sorry if I made english mistakes.

How can I have old extended tracking feature back instead of device tracker ?

October 23, 2018 - 3:16am #3


Thanks for your answer.

Sorry, my bad, I think I misunderstood how the device tracking really works. I thought we could not use device tracker and first_target mode together but I was wrong. I don't remember why I thought that, I had some bad results when I tested it some weeks ago but now everything works fine.


How can I have old extended tracking feature back instead of device tracker ?

October 22, 2018 - 7:26am #2


FIRST TARGET works with device tracker in 7.2. It is correct that device tracker and the TARGET world center modes used to be mutually exclusive, but they no longer are - the default will be DEVICE, but it can be changed to FIRST_TARGET on the ARCamera.

This is captured in the 7.2 release notes: "Device Tracking can now be used for all world center modes and is no longer a separate mode. The CAMERA and DEVICE_TRACKING modes have been replaced by a new DEVICE mode that is now the default mode for new scenes"

Please let us know if you've found something in documentation that states otherwise.


Vuforia Engine Support

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