3
$\begingroup$

I found the rotation matrix returned by SensorManager.getRotationMatrix from link: What's the best 3D angular co-ordinate system for working with smartphone apps

The rotation matrix is: Rotation matrix returned by getRotationMatrix

But I cannot find the steps to reconstruct this matrix when I used the rotation matrix for each axis as specified in link: http://www.freescale.com/files/sensors/doc/app_note/AN3461.pdf

Rotation matrix for each axis

Rotation matrix for each axis

I really appreciate if anyone can show me the steps so that I can construct the above rotation matrix because I cannot find any document that shows me the steps to create this matrix.

And at the above link, there is also a matrix as following: Rotation matrix for compass

How can I calculate the matrix Matrix Rotation matrix for EN plan .What does it mean?

$\endgroup$
1
$\begingroup$

I have the same problem with you at first ,but after i compute the rotation

matrix multiplication in the order y, x, z axis, the result turns right. The

formula in the pdf is wrong. Another hint is that the in Android, the angle

around -X axis is pitch(value[1]) and the angle around -Z is azimuth(value[0]).

So the angle around X axis is -pitch(-value[1]) and the angle around Z is

-azimuth(-value[0]). Finally, multiply all the rotation matrix together u can get the right result.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.