1 | initial version |
So you aren't having a problem. It's just different rotational representations. Both of your examples have essentially identical quaternions, if you negate one of the two.
It's very difficult to comprehend the contents of rvec. MRPs just don't make intuitive sense, in any particular form. But what I see from the quaternions is that there's no big changes from one to the next, just a negation.