Comment on Device Orientation API

Dear members of the Geolocation Working Group,

I am Martin Lechner, CTO of Wikitude, a member of W3C and developer of 
the Wikitude World Browser.

We are currently developing an augmented reality project on platforms 
based on the DeviceOrientation API, and do have a comment regarding some 
specific items in the draft specification.

The current specified update rate of the device orientation event is not 
sufficient for our usecase. Specifically the phrase: “the event should 
fire whenever a significant change in orientation occurs.” leaves it up 
to the implementation when exactly to fire an event.

We are already seeing different implementation in the prerelease 
versions of Opera (LAB Opera Mobile) and Mozilla (Aurora). While Mozilla 
reports events quite frequently (which is preferred by us), Opera 
matches the specification and reports events only if there is a change 
of approximately 4 degrees.

Our suggestion would be to let the web developer define how accurate the 
orientation changes should be reported. E.g. like the accuracy modes in 
Geolocation API. For AR it would be nice to have a high accuracy to 
achieve more events to get a smoother, more accurate calculation when 
moving the device.

Best regards,
Martin Lechner

-- 
- - -
Martin Lechner
CTO

Wikitude GmbH
Ginzkeyplatz 11
5020 Salzburg/Austria
Phone +43 662 243310
Mobile +43 676 840 856 300

http://www.wikitude.com

Received on Wednesday, 29 February 2012 14:48:32 UTC