Formula of rotation in terms of gyro / accelerometer

[redskyhk]

May I have the formula for direction of rotation always pointing to gravity, using gyro / accelerometer expressions? I do not understand the detail of the gyro xy / accelerometer xy readings.

[lucky.andrei]

[TOMAJA Mini Tutorial] Gyro 3D Interactive Wrist Movement Effects & Animations

Hello to everybody, welcome to my new tutorial, where I show you how easy and simple a super cool wrist movements interactive (2D and 3D) effect could be. We will speak about the accelerometer (gyro) functions. Actually, it is so easy that one picture explains everything [image] As you see one number is everything we need to deal with. In the picture above (most natural movements of a wrist between the angle 0 and 90 degree) this value is increasing smoothly from 0 to 10. Here is the …

[redskyhk]

Thanks to lucky.andrei and I worked out a formula, which still have space of improvement.

Rotation:
$accelerometerRawX()>=0?(360-(deg(acos(accelerometerRawY()/-10)))):(deg(acos(accelerometerRawY()/-10)))$