我正试图在纵向方向上拍摄设备的俯仰和滚动。 With the axes looking like this,它分别是x和z轴。现在我正在使用SensorManager API来使设备的俯仰,滚转和偏航平放,as is default.
当我尝试将旋转值从平面设备转换为垂直方向时,我会体验到其他SO用户称之为万向节锁定,这是欧拉角度工作中固有的问题。问题是我尝试实现一个旋转矩阵,as other users have来解决类似的问题,但即使我仍然有同样的万向节锁定问题。我已经包含了我的onSensorChanged方法,希望有人可以帮助找出问题所在。
public void onSensorChanged(SensorEvent se) {
float degPitch = 0;
float degRoll = 0;
float degYaw = 0;
float radPitch = 0;
float radRoll = 0;
float radYaw = 0;
if (se.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
mAccelerometerResult = se.values;
Log.d("onSensorChanged", "Accelerometer: " + mAccelerometerResult.length);
}
if (se.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
mMagneticFieldResult = se.values;
Log.d("onSensorChanged", "Magnetic Field: " + mMagneticFieldResult.length);
}
if (mAccelerometerResult != null && mMagneticFieldResult != null) {
float[] rotation = new float[9];
float[] inclination = new float[9];
boolean rotationMatrixCheck = mSensorManager.getRotationMatrix(rotation, inclination, mAccelerometerResult, mMagneticFieldResult);
if (rotationMatrixCheck) {
float[] orientation = new float[3];
mSensorManager.getOrientation(rotation, orientation);
radYaw = orientation[0]; //Yaw = Z axis
radPitch = orientation[1]; //Pitch = X axis
radRoll = orientation[2]; //Roll = Y axis
degYaw = round((float) Math.toDegrees(radYaw), 2);
degPitch = round((float)Math.toDegrees(radPitch), 2);
degRoll = round((float)Math.toDegrees(radRoll), 2);
if ((counter % 10) == 0) {
//mYawTextView.setText(degYaw + "°");
mPitchTextView.setText(degPitch + "°");
mRollTextView.setText(degRoll + "°");
counter = 0;
} else {
counter++;
}
}
}
此外,我甚至不确定我是否理解我正在寻找的旋转值,如果我可以获得关于肖像轴的良好旋转。如果我想要设备的纵向卷轴(关于我原始图像的z轴),那么仍然是设备平放的卷(从平面轴图像约为y)?
任何可以在这里分享的见解都将受到赞赏。
答案 0 :(得分:0)
我找到了问题的解决方案。如原始问题中所讨论的,将旋转矩阵以3×3网格获得以欧拉角度返回旋转矩阵。在4x4网格中获取矩阵将返回旋转矩阵(According to SO user Stochastically's answer found here).
的四元数表示此外,必须重新映射旋转矩阵坐标系以便在纵向模式中使用。评论的变化如下所示。
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