Enable/Disable SteamVR on focus gain/loss

Hi @ all,

to be able to run multiple instances of a VR game (for networking), I want to enable VR on window focus and disable it on focus loss. In Player Settings > XR, I disable VR support. In a script, I call the following Update()-Method to enable VR support at runtime:

Code (CSharp):

1. void Update () {
2.         if(!Application.isFocused)
3.         {
4.             if(!hasFocus) return;
5.             XRSettings.enabled = false;
6.             hasFocus = false;
7.             Debug.Log("Application lost focus");
8.         }
9.         else
10.         {
11.             if(hasFocus) return;
12.             XRSettings.enabled = true;
13.             hasFocus = true;
14.             Debug.Log("Application gained focus");
15.         }
16.     }

This works very well in editor, but if I try it via Build & Run, it won't start the VR camera.

Any ideas where the error could be? Or any other approach to achieve this behavior? Many thanks in advance.

 

Check if you have the "None" VR SDK added on your player settings, also see this https://docs.unity3d.com/ScriptReference/XR.XRSettings.LoadDeviceByName.html

And use this code, we are using it at the office, its from someone else but i don't remember where we got it

Code (CSharp):

1. IEnumerator SwitchToVR()
2.     {
3.         VRSettings.LoadDeviceByName("cardboard"); // Or "cardboard" (both lowercase).
4.  
5.         // Wait one frame!
6.         yield return null;
7.  
8.         // Now it's ok to enable VR mode.
9.         VRSettings.enabled = true;
10.     }
11.     IEnumerator SwitchOutOfVr()
12.     {
13.         VRSettings.LoadDeviceByName(""); // Empty string loads the "None" device.
14.  
15.         // Wait one frame!
16.         yield return null;
17.  
18.  
19.     }

 

Sorry for the late answer. Works perfectly, thank you very much.

If anyone's interested in the whole code:

Code (CSharp):

1. void Update () {
2.         if(!Application.isFocused)
3.         {
4.             if(!hasFocus) return;
5.             StartCoroutine(SwitchOutOfVr());
6.             hasFocus = false;
7.             Debug.Log("Application lost focus");
8.         }
9.         else
10.         {
11.             if(hasFocus) return;
12.             Debug.Log(xrdevice);
13.             StartCoroutine(SwitchToVR());
14.             hasFocus = true;
15.             Debug.Log("Application gained focus");
16.         }
17.     }
18.  
19. IEnumerator SwitchToVR() {
20.         XRSettings.LoadDeviceByName("OpenVR"); // Or whatever device you wanna use
21.  
22.         // Wait one frame!
23.         yield return null;
24.  
25.         // Now it's ok to enable VR mode.
26.         XRSettings.enabled = true;
27.     }
28.  
29. IEnumerator SwitchOutOfVr() {
30.         XRSettings.LoadDeviceByName(""); // Empty string loads the "None" device.
31.  
32.         // Wait one frame!
33.         yield return null;
34.  
35.  
36.     }

 

I can't make it work with newest SteamVR 2.0.1! It keeps calling update functions on poses and actions even after disabling VR.
Anyone who experienced something similar?