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
 }

Add comment · Show 1 · Share

Barliesque · Apr 30, 2020 at 12:12 AM 0

Share

Before using that event to detect when the player puts the headset on, I suggest checking to see if they're already wearing the headset. If they are, that event won't be fired until they remove the headset and put it back on.

         if (OVRPlugin.userPresent)
         {
             Headset$$anonymous$$ounted();
         }
         else
         {
             OVR$$anonymous$$anager.H$$anonymous$$D$$anonymous$$ounted += Headset$$anonymous$$ounted;
         }

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.
             }

Add comment · Share

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();     
 }

Add comment · Show 1 · Share

WJRRO · Apr 04, 2017 at 02:06 PM 0

Share

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 OVR$$anonymous$$anager 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 )

Add comment · Share

Detecting Oculus HMD is removed

4 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions