[Tutorial] OpenXR PC VR : How to use VIVE Tracker

[VIVE_chengnay]

4 minutes ago, AEntropy said:

I tested what you suggested, installing VIU and running the UGUI scene, but running this makes no sense as it is a scene meant to work with Controllers, not with Trackers. The tracker doesn't show up, but it works with controller, so this doesn't help.

Hi @AEntropy,

Tracker model doesn't show up?

Is it because your setup is OpenXR?

Could you take a screenshot of your project settings(XR Plug-in Management)?

[AEntropy]

 

[VIVE_chengnay]

Hi @AEntropy,

I think I found the post that you mentioned which was written by someone.

After looking into the code, it looks quite the same as what HTCX documented.

https://registry.khronos.org/OpenXR/specs/1.0/html/xrspec.html#XR_HTCX_vive_tracker_interaction

Unfortunately, there is no script that can be downloaded.

Did you try this script yet?

[AEntropy]

20 hours ago, VIVE_chengnay said:

Hi @AEntropy,

I think I found the post that you mentioned which was written by someone.

After looking into the code, it looks quite the same as what HTCX documented.

https://registry.khronos.org/OpenXR/specs/1.0/html/xrspec.html#XR_HTCX_vive_tracker_interaction

Unfortunately, there is no script that can be downloaded.

Did you try this script yet?

Yes, this is what we have been working with.

We need someone, preferably someone at HTC Vive who understands the Actions system and Unity's new Input System to go in and make this script work with all the Actions described in the Khronos OpenXR standards. It sounds like you don't have much knowledge on how that works, so you may need to contact someone who works directly on that. I am guessing likely someone working on the newer Vive Self Tracker is making it work with OpenXR, so they may have some Tracker Profile already created for that, that may have some Actions implemented. Maybe Dario has some knowledge.

Here are the Actions outlined in the OpenXR Standards:


Out of those Actions, only the "/input/grip/pose" Action works for some reason. I haven't been able to get any of the other Actions working. So, if we can get someone to get those working, that'd solve the problem.

[Laudert]

Hi, I´d also like to know if any of you know how to get the Pogo Pins working in Unreal 5.3 with the Vive Trackers.
Thank you

[Robbert]

Don't know what happened. But somehow the Pogo pins started to work. Maybe a SteamVR update fixed the issue.

Tested it with Unity 2021.3 (Unity XR SDK)

The profile (see attachment) is not complete yet but it supports the trigger pin. I still get some type ButtonControl (float) vs int value warnings but don’t have time the look into that. Hope someone get this fully functioning.

HTCViveTrackerProfile.cs

[VIVE_chengnay]

Hi @Robbert,

Thanks for your information.

I will test the script and try to finish the rest.

Could you list the version of your SteamVR and plugins that you installed in your project?

[Robbert]

I'm using SteamVR v2.1.10 and I think its using the OpenXR Runtime from SteamVR.

[VIVE_chengnay]

Hi @Robbert,

May I know how did you test Trigger button?

Which sample scene did you test on?

I created Input Action, but it doesn't seem to work.

[Robbert]

We have a hardware adapter with a single button the connects to the pogo pins. 

I have a very simple unity secene that has a basic XR Origin and a GameObject for the tracker with a TrackedPose driver and a custom script with InputActionReference triggerReference = null; and callbacks ( triggerReference.action.started += TriggerCB;     triggerReference.action.canceled += TriggerCB;) to detect the actions.

Did you add the HTC Tracker profile to the Interaction profiles and created a XR Input action map to associate the pose and trigger with the InputActionReference?