Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Math operations for geometry_msgs/Vector3

asked 2011-10-17 20:36:10 -0500

raahlb
317 ●6 ●13 ●21

updated 2011-10-17 20:36:42 -0500

I have an IMU sensor mounted on my robot, but without properly aligned axes. To more get more easily processed data, I want to transform its output so the axes align. This is quite easily done with some calibration and usage of the dot product. However, there seem to be no math operations defined for Vector3 in geometry_msgs.

Is the proper way to do this to create a new vector of Eigen's format, do the calculations and then convert it back to Vector3? As I've understood there's no way to just cast between the types.

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2011-10-17 21:22:32 -0500

Felix Endres

6468 ●28 ●57 ●93 http://www.informatik....

As far as I know, there are no math operators for the message types. For many geometry messages there are converter functions in TF. The resulting types are typedefs to bullet types which have many math methods. Here is the conversion method for Vector3 and the according bullet documentation.

edit flag offensive delete link

Comments

OK, I see. Doesn't seem to be that different from using Eigen, but at least it's closer to being a built-in type in ROS. I might stick to using my own implementation of the needed operations for geometry_msgs::Vector3. Thanks!

raahlb ( 2011-10-17 23:42:10 -0500 )edit

add a comment

Question Tools

Stats

Asked: 2011-10-17 20:36:10 -0500

Seen: 2,499 times

Last updated: Oct 17 '11

Math operations for geometry_msgs/Vector3 edit

1 Answer

Comments

Question Tools

Stats

Related questions

Math operations for geometry_msgs/Vector3