Android Question LibGDX - How to calibrate accelerometer?

[jtare]

Im trying to set a new zero for the accelerometer and found this what seems to be the solution:
https://stackoverflow.com/questions/9705446/calibrating-3d-accelerometer-for-2d-game
But I couldn't translate it to B4a, methods like "Quaternion().setFromCross" are missing in the LibGDX library, it is possible to take this code and move it into B4A?

1. Capture a vector representing the neutral direction:
   

   Vector3 tiltCalibration =newVector3(Gdx.input.getAccelerometerX(),Gdx.input.getAccelerometerY(),Gdx.input.getAccelerometerZ());

2. Transform this vector into a rotation matrix:
   

   publicvoid initTiltControls(Vector3 tiltCalibration ){Vector3.tmp.set(0,0,1);Vector3.tmp2.set( tiltCalibration ).nor();Quaternion rotateQuaternion =newQuaternion().setFromCross(Vector3.tmp,Vector3.tmp2 );
   
   Matrix4 m =newMatrix4(Vector3.Zero, rotateQuaternion,newVector3(1f,1f,1f));this.calibrationMatrix = m.inv();}

3. Whenever you need inputs from the accelerometer, first run them through the rotation matrix:
   

   publicvoid handleAccelerometerInputs(float x,float y,float z ){
   
   Vector3.tmp.set( x, y, z );Vector3.tmp.mul(this.calibrationMatrix );
   
   x =Vector3.tmp.x;
   y =Vector3.tmp.y;
   z =Vector3.tmp.z;
   
   [use x, y and z here]...}

For what I know, to work with Quaternion in LibGDX (B4A) first you need to declare a 4x4 matrix, you don't work directly with a variable of type Quaternion.
Something like:

Dim Quaternion As lgMathMatrix4