Detecting Oculus HMD is removed

Question

While running and with an Oculus HDM attached does anyone know of a way to detect if the user/player has removed the headset? I'm trying to setup a script to trigger rendering on screen instructions to the desktop display and then reload the scene once a new player puts the headset on to restart the experience in a multi user scenario.

Answer 1

Best Answer

Answer by WJRRO · Aug 24, 2016 at 05:17 AM

@delphinius81 Posting your answer from Oculus Dev forums:

"You can register delegates for the HMDMounted and HMDUnmounted events through OVRManager.

 OVRManager.HMDMounted += HandleHMDMounted;
 OVRManager.HMDUnmounted += HandleHMDUnmounted;
 
 void HandleHMDMounted() {
    // Do stuff
 }
 
 void HandleHMDUnmounted() {
    // Do stuff
 }

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Answer 2

Answer by Hyperactive · Feb 07, 2018 at 10:27 AM

Yesterday I was working on this issue and figured that HMD mount detection happens in OVRManager here:

 if (!_wasHmdPresent && isHmdPresent)
         {
             try
             {
                 if (HMDAcquired != null)
                     HMDAcquired();
                         //Put here code that you want to run when the HMD is mounted.
             }`

And then the same goes for removal of the HMD:

     if (_wasUserPresent && !isUserPresent)
         {
             try
             {
                 if (HMDUnmounted != null)
                     HMDUnmounted();
                         //Put here code that you want to run when the HMD is unmounted.
             }

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Answer 3

Answer by CorstiaanMediamonks · Apr 04, 2017 at 09:01 AM

Has anyone succeeded in getting this to actually work?

I've tried this but doesn't do anything. When the HMD is taken off, the screen goes black and Unity app suspends.. I haven't been able to run any code in response.

 OVRManager.HMDUnmounted += OnHDUnmounted;
 
 private void OnHDUnmounted()  {
     VRSettings.enabled = false;
     BackToMenu();     
 }

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WJRRO · Apr 04, 2017 at 02:06 PM 0

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To get content to continue rendering after you remove the headset you need to enable both run in background in the player settings and inside OVRManager set "runInBackground" bool to "true".

Answer 4

Answer by Phildo · Dec 07, 2017 at 03:34 PM

This still does not work for me. See this question: https://answers.unity.com/questions/1439714/unity-oculus-ovr-not-responding-to-removeput-on-he.html

I see the comment saying "enable run in background in player settings and inside OVRManager" - I've done so in Player Settings (and in code), but OVRManager lacks a "runInBackground" property... (see docs here: https://developer3.oculus.com/doc/1.18-unity/class_o_v_r_manager.html )

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Detecting Oculus HMD is removed

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