how to detect device start position for player acceleration (iPhone)

Questions & Answers
1

Hello, I finished a mobile game where I use the phone’s acceleration to move the player. But currently it works correctly only when facing flat as if it was laying on a table. is there a way I can detect device start position on an iPhone so the game can pick up the correct acceleration? This is in landscape mode also in 2D.

2

You will have to calibrate in the start method for example and then multiply the Input by the calibration: (I found this in the forums, posted by @WolfBeardedLion )

private Quaternion calibrationQuaternion;
 
// Used to calibrate the Input.acceleration
void CalibrateAccelerometer()
{
    Vector3 accelerationSnapshot = Input.acceleration;
 
    Quaternion rotateQuaternion = Quaternion.FromToRotation(
        new Vector3(0.0f, 0.0f, -1.0f), accelerationSnapshot);
 
    calibrationQuaternion = Quaternion.Inverse(rotateQuaternion);
}
   
void Start()
{
    CalibrateAccelerometer();
}
 
void Update()
{    
    Vector3 theAcceleration = Input.acceleration;
    Vector3 fixedAcceleration = calibrationQuaternion * theAcceleration;
 
    // Use fixedAcceleration for any logic that follows
}