Re: [webvr] [gamepad] Missing VRPose for tracked controllers

Apologies if this comes across twice - the mailing list rejected my first
attempt :-)

Do we need to know if a given Gamepad is orientation only versus
position+orientation? I'm seeing a lot of devices that only know their
orientation and we could detect this by a 0,0,0 position, but having a flag
telling me if position will change could be useful. I just did a quick
review and I didn't see anything that would help me here.

Also, what about devices where the controllers report relative to the HMD
and the HMD is relative to world space? Do we want any new prose on VRPose
that covers these potentially more complicated scenarios?

On Tue, May 24, 2016 at 11:12 AM, Kearwood "Kip" Gilbert <
kgilbert@mozilla.com> wrote:

> Brandon Jones (Google) has made some experimental WebVR Chromium builds
> that include support for the HTC Vive VR motion controls.  We would like to
> propose this as a standard and update to the GamePad API.
>
> Brandon has started a thread on w3.org that gives some background:
>
> https://lists.w3.org/Archives/Public/public-webapps/2016AprJun/0052.html
>
> The WebVR API 1.0 has already extended the GamePad API by adding a
> “displayID” attribute:
>
> https://mozvr.com/webvr-spec/#interface-gamepad
>
> The proposal is to take this further and expose an optional “pose”
> attribute, which would return the same attributes within the VRPose:
>
> https://mozvr.com/webvr-spec/#interface-vrpose
>
> Cheers,
>  - Kearwood “Kip” Gilbert
>    Platform Engineer, Mozilla VR Team
>
> On May 24, 2016, at 12:22 AM, Sven Neuhaus <sven-w3@sven.de> wrote:
>
> Hello Florian,
>
> Thanks for pointing out the WebVR spec draft.
>
> The WebVR draft dated April 1st contains a Gamepad interface expansion
> (§2.11), however it only extends it by a DisplayId.
> It should also add a VRPose for tracked controllers.
>
> I think adding a VRPose could have benefits for non-VR applications as
> well (think about the Nintendo Wii controllers!), however. So my
> suggestion to add it to the Gamepad API still stands.
>
> Regards,
> -Sven Neuhaus
>
> Am 23.05.2016 um 15:52 schrieb Florian Bösch:
>
> The WebVR API models HMD pose and will model the gesture controllers.
> https://mozvr.com/webvr-spec/
>
> On Tue, May 17, 2016 at 9:41 AM, Sven Neuhaus <sven-w3@sven.de
> <mailto:sven-w3@sven.de>> wrote:
>
>
>    I read the gamepad API description at
>    https://developer.mozilla.org/en-US/docs/Web/API/Gamepad
>
>    I think the gamepad API should support a VRpose for gamepad controllers
>    like the ones included with the HTC Vive and the upcoming Oculus Touch
>    controllers.
>
>    I suggest that you add a getPose() method that returns a VRPose object
>    for controllers that support tracking.
>
>    The "orientation" property of the VRPose object could also be useful for
>    some gamepads that include IMUs for orientation tracking.
>
>
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