AR.js - Experimenting on gravity
Maybe i can use it to consolidate marker pose ?

accelerationIncludingGravityX:
accelerationIncludingGravityY:
accelerationIncludingGravityZ:

accelerationX:
accelerationY:
accelerationZ:

gravityX:
gravityY:
gravityZ:
gravityLength:

Absolute:
Alpha:
Beta:
Gamma: