iPhone方向表示为旋转

Question

Ola Folks，

 This might not be the right place for this. Let me know where I should post if I should post it elsewhere.

 I want to get the orientation of the device. I am thinking I can use something like this:

float fAngleX = atan2(acceleration.y, acceleration.z);
float fAngleY = atan2(acceleration.x, acceleration.z);
float fAngleZ = atan2(acceleration.y, acceleration.x);


 First, is my formula right?
 Second, is this going to work for the device? 
 Third, I'm going back and forth about filtering out gravity. Any thoughts?
 Lastly, is there a better way to get the devices orientation expressed as rotation for all three axis?

感谢名单

-isdi -

Answer 1

要将设备旋转为三个这样的数字，实际上是模棱两可的。这种事情会让人很困惑。我认为这可能是最好的开始：http://en.wikipedia.org/wiki/Euler_angles

Answer 2

只要你小心你可以使用角度，虽然它可能更容易直接使用矢量。

你几乎肯定想做过滤;一个简单的低通很好，但不要过滤掉重力，因为是设备的方向:)。