WebVR starting with enableVR()

[PavolHejný]

Hi,

I am creating WebVR app with Babylon.js (using Firefox, SteamVR and HTC Vive).  Can I somehow start VR without users initial click.

When i create WebVRFreeCamera:

const camera = new BABYLON.WebVRFreeCamera("camera", BABYLON.Vector3.Zero(), scene);

I can start VR with:

scene.onPointerDown = function () {
    camera.attachControl(document.getElementById('scene'), true);
};

or

scene.onPointerDown = function () {
    camera.getEngine().enableVR();
};

but when i do it without onPointerDown callback it does not work:

const camera = new BABYLON.WebVRFreeCamera("camera", BABYLON.Vector3.Zero(), scene);
camera.getEngine().enableVR();

 

Also when i wrap it with setTimeout it does not work:

const camera = new BABYLON.WebVRFreeCamera("camera", BABYLON.Vector3.Zero(), scene);
scene.onPointerDown = function () {
    setTimeout(()=>{
            camera.getEngine().enableVR();
        },100);
};

Does enableVR method needs onPointerDown event context. Or where is the problem?

Thanks a lot for your advice.

[Guest]

Hello this is a spec enforced limitation. Starting a VR sequence has to be done from a user initiated event (pointerDown then for instance)

[HoloLite]

If the user is actually wearing the headset, you can start webvr automatically by listening to the vrdisplayactive.

The code looks like the following:

window.addEventListener('vrdisplayactivate', () => {
    vrHelper.enterVR();
});

The supermedium browser will need you to automatically start webvr once the user puts on the headset.

The behavior for each browser is different though.
This is the observations I noticed:

- Supermedium honors this event always.

- Firefox honors this event but you do need to click that button (to give the permission) once in the beginning. Imo this is the correct behavior.

- Edge seems to ignore it :)