How do I set headset.position = viveTracker.position?

[offchan42]

In this SteamVR panel, there are 2 drivers: the driver for the headset and the built-in driver for the Vive tracker.

The headset is simply a phone with gyroscope, so it doesn't have a position tracking solution. It only have rotation. I want to physically attach the Vive tracker to the headset and set the headset's position = the tracker's position + offset.

I have 2 solutions in mind:

1. Access Vive tracker position and continuously set headset's position = tracker + offset.
2. Write a driver for both headset and tracker to merge them together. This means only one icon will be shown in the SteamVR panel.
   I prefer the 2nd solution to be working more. How do I achieve this?

How do I access the position of the tracker and then also disable it from appearing in the panel? (Which means no apps will be able to find the tracker anymore)
Any links/tutorials/resources would be appreciated. Thank you!

[offchan42]

Also, I've built a Vive-like tracker using the HDK provided by Triad Semiconductor. So it means I can identify the tracker as controller or HMD. If this helps in solving the problem then also tell me.

[offchan42]

Another viable approach which I really like is to identify my tracker as my own device. But the HDK forum does not help very well. They don't answer questions.

So maybe someone here knows how to change the HDK JSON file so that the device identifies as a unique device that is not HMD or controller?
E.g. I want the tracker to be identified as "My unique tracker" with my own icon on the panel, but still tracks like Vive tracker. The only differences should be the name/ID and the icon. After the device has a different name/ID than Vive tracker then we can be sure that it will not mess with some games where developers try to access Vive tracker by name/ID. So it means that this device can be shown in the panel fine. Developers can access the device if they want, but the critical thing is that it doesn't affect old games that try to access Vive trackers.

How do I do this? (If you know how to do this then the previous solutions I don't need anymore).

Why do I need my device to have different identity to the Vive tracker?
If my device has the same identity as Vive tracker then it could break the assumption that developers make. E.g. developers might assume that the available trackers in the scene are for foot and hip, but if my device is attached to the head, this assumption will be broken. There will now be trackers for head, foot, and pelvis.

[offchan42]

So essentially the simplest way out of this is for me to be able to write a driver for a Vive tracker that has a specific name.

[offchan42]

See #1112