From 5045aa0c3151269f91cd5ff54b1eb15b2d97fff5 Mon Sep 17 00:00:00 2001 From: Brandon Jones Date: Tue, 11 Jul 2017 15:51:10 -0700 Subject: [PATCH] Some minor verbiage updates based on feedback from today's call. --- explainer.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/explainer.md b/explainer.md index c9b0a54d..5955aaa0 100644 --- a/explainer.md +++ b/explainer.md @@ -495,7 +495,7 @@ vrSession.addEventListener('resetpose', vrSessionEvent => { ### Presenting automatically when the user interacts with the headset -Many VR devices have some way of detecting when the user has put the headset on or is otherwise trying to use the hardware. For example: an Oculus Rift or Vive have proximity sensors that indicate when the headset is being worn. And a Daydream device uses NFC tags to inform the phone when it's been placed in a headset. This is referred to as the `VRDevice` being "activated", and represents the user showing a clear intent to begin using VR. A well behaved WebVR application should ideally begin presenting automatically in these scenarios. +Many VR devices have some way of detecting when the user has put the headset on or is otherwise trying to use the hardware. For example: an Oculus Rift or Vive have proximity sensors that indicate when the headset is being worn. And a Daydream device uses NFC tags to inform the phone when it's been placed in a headset. This is referred to as the `VRDevice` being "activated", and depending on context it may represent the user showing a clear intent to begin using VR. A well behaved WebVR application should ideally begin presenting automatically in these scenarios. In order to start presenting when the `VRDevice` is activated pages can request a deferred session. A deferred session is requested using the normal `requestSession` function and given a `deferTill` option to indicate the criteria that must be fulfilled before the session will be created. So if a session is requested with the option `{ deferTill: 'activate' }` the request will remain outstanding until the `VRDevice` is activated, at which point the promise will resolve with the requested session (or reject, if necessary.) @@ -506,9 +506,9 @@ Deferred sessions must be exclusive and will not be fulfilled if there is alread vrDevice.requestSession({ deferTill: 'activate' }).then(OnSessionStarted); ``` -Once the session has ended a new deferred session request will need to be issued if the page wishes to respond to future activation actions. +Once the deferred session request has been fulfilled or rejected a new deferred session request will need to be issued if the page wishes to respond to future activation actions. -To detect when the user removes the headset, at which point the page may want to end the session, listen for the `deactivate` event. +To detect when the user removes the headset, at which point the page may want to end the session, listen for the `deactivate` event. Note that not all devices capable of detecting activation can reliable detect deactivation, so pages are not guaranteed to receive an associated deactivate event for each activation action. ```js vrDevice.addEventListener('deactivate', (vrDeviceEvent) => {