Re: [sensors] Provide the DeviceOrientation sensor

You could also look at the quartenion _a + bi + cj + dk_ as a scalar +
 3 dimensional vector, which seems to be what you do implicitly in the
 comment. 

z-axis points up and is perpendicular to the ground - and with ground 
you mean plane made up of x and y axis.

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Received on Monday, 27 February 2017 12:31:54 UTC