Define GeomagneticOrientationSensor interface

[alexshalamov]

The OrientationSensor interface could define methods and internal slots (quaternion), while subclasses can explicitly define model and what kind of low-level sensors are used for fusion, e.g.:

• AbsoluteOrientationSensor : OrientationSensor, uses gyroscope, acceleromter and magnetometer.
• GeomagneticOrientationSensor : OrientationSensor, uses accelerometer and magnetometer.
• RelativeOrientationSensor : OrientationSensor, uses gyroscope and accelerometer.

[pozdnyakov]

SGTM

[kenchris]

Can we actually implement this. I mean on Android the above "AbsoluteOrientationSensor" might use different impl if magnetometer isnt available. Is it possible for us to detect that?

[kenchris]

Apart from that, I think this is fine.

[anssiko]

@kenchris, it seems your explainer doc does identify high value use cases for all three:

https://w3c.github.io/motion-sensors/#orientation
https://w3c.github.io/motion-sensors/#geomagnetic-orientation
https://w3c.github.io/motion-sensors/#relative-orientation

That said, the use case for Relative Orientation Sensor ("This avoids the delay which low and high pass filters introduce.") could be more explicit.

[alexshalamov]

Can we actually implement this. I mean on Android the above "AbsoluteOrientationSensor" might use different impl if magnetometer isnt available. Is it possible for us to detect that?

@kenchris Yes, we can always check what low level sensors are supported by the platform.

[pozdnyakov]

@kenchris in that perspective (and looks like we all agreed :) ) do you think it's worth renaming Orientation Sensor into Absolute Orientation Sensor in https://w3c.github.io/motion-sensors/#orientation ?

[kenchris]

If we can do that without instantiating them, awesome, then let's go with this :-)

[kenchris]

@pozdnyakov yes that makes sense.

[pozdnyakov]

If we can do that without instantiating them, awesome, then let's go with this :-)

we can :D

[alexshalamov]

Reopening the issue, as it should be closed only when last GeomagneticOrientationSensor is specified.

[anssiko]

Marked as "Level 2" per WG call decision.