remapCoordinateSystemの引数には何を指定する？|Android開発

public class OrientationSensor implements SensorEventListener
{
    private static final int MATRIX_SIZE = 16;

    /* 回転行列 */
    private float[] mInR;
    private float[] mOutR;
    private float[] mI;
    private float[] mMagneticValues;
    private float[] mAccelerometerValues;

    private int mCurrentDegreeLandscape;
    private int mCurrentDegreePortrait;

    public OrientationSensor() {
        mInR = new float[MATRIX_SIZE];
        mOutR = new float[MATRIX_SIZE];
        mI = new float[MATRIX_SIZE];

        mMagneticValues = new float[0];
        mAccelerometerValues = new float[0];
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        switch (event.sensor.getType()) {
            case Sensor.TYPE_ACCELEROMETER:
                mAccelerometerValues = event.values.clone();
                break;
            case Sensor.TYPE_MAGNETIC_FIELD:
                mMagneticValues = event.values.clone();
                break;
            default:
                return;
        }

        if (mMagneticValues.length <= 0 || mAccelerometerValues.length <= 0) {
            return;
        }

        SensorManager.getRotationMatrix(mInR, mI, mAccelerometerValues, mMagneticValues);

        float[] orientationValues = new float[3];

        SensorManager.remapCoordinateSystem(mInR, SensorManager.AXIS_Z, SensorManager.AXIS_MINUS_X, mOutR);
        SensorManager.getOrientation(mOutR, orientationValues);
        int degreeLandscape = radianToDegree(orientationValues[0]);
        if (degreeLandscape < 0) {
            degreeLandscape += 360;
        }

        SensorManager.remapCoordinateSystem(mInR, SensorManager.AXIS_X, SensorManager.AXIS_Z, mOutR);
        SensorManager.getOrientation(mOutR, orientationValues);
        int degreePortrait = radianToDegree(orientationValues[0]);
        if (degreePortrait < 0) {
            degreePortrait += 360;
        }

        mCurrentDegreeLandscape = degreeLandscape;
        mCurrentDegreePortrait = degreePortrait;
        Log.v("OrientationSensor", String.format("DEGREE: land(%d), port(%d)", mCurrentDegreeLandscape, mCurrentDegreePortrait));
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // NOP
    }

    private static int radianToDegree(float radian) {
        return (int) Math.floor(Math.toDegrees(radian));
    }
}