problem in geometry_msgs::Pose
what is x, y, z and w in Quaternion oriention? specially what is w?
ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
what is x, y, z and w in Quaternion oriention? specially what is w?
Have a look at REP103 on Standard Units of Measure and Coordinate Conventions. If you're not familiar with quaternions it also helps to have a look at pages like this Wikipedia page on Quaternions and spatial rotation.
Also for information about any message you can use the rosmsg command with the --raw option to see the comments. Or browse the online docs for the message http://ros.org/doc/electric/api/geometry_msgs/html/msg/Pose.html
Hi,
For representing orientation in ROS, quaternions are used. They do not represent a human-readable format like e.g. euler angles (more information about quaternions here: http://en.wikipedia.org/wiki/Quaternion ).
To easily convert between euler angles and quaternions, the tf-ROS package offers a set of functions like "createQuaternionFromYaw" or similar...
Have a look at <tf transform_datatypes.h=""> for more information.
Asked: 2012-03-23 04:15:26 -0500
Seen: 5,269 times
Last updated: Mar 23 '12
quaternions orientation representation
What is the difference between geometry and tf quaternions?
Gazebo object pose and getAsEuler
Setting Specific Turn Angle on the PR2
Calculate difference between two poses
3D plot from geometry_msgs/Pose message