Rotate quaternion by body yaw

asked 2018-09-25 21:12:52 -0500

okalachev
11 ●7 ●9 ●13

updated 2018-09-25 21:13:28 -0500

How to change a quaternion's body-fixed yaw?

Using Matrix3x3's getRPY and then setRPY doesn't work, because this is about the axes, fixed to the initial orientation, so it's fixed yaw, not body yaw.

Using getEulerYPR and then setEulerYPR doesn't work as well, because yaw rotation it the first, and it gets affected the following pitch and roll rotation.

I think getEulerRPY/setEulerRPY might work, but there are no such functions in the tf and tf2 libraries.

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answered 2018-09-28 18:43:48 -0500

okalachev
11 ●7 ●9 ●13

This looks working (pq - input quaternion):

tf::Quaternion q;
q.setRPY(0, 0, angle_to_rotate);
pq = pq * q;

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answered 2018-09-25 23:38:24 -0500

Hamid Didari

1769 ●26 ●43 ●53

hi

try to use:

tf::Quaternion rotation;
rotation = tf::createQuaternionFromRPY(Roll,Pitch,Yaw);

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The problem is, that if I keep roll and pitch, changing the yaw, that would be rotation about extrinsic Z axis, while I need about intrinsic (body-attached) one.

okalachev ( 2018-09-26 08:30:46 -0500 )edit

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