Revision history [back]

The Twist message type consists of a Linear Vector3 and Angular Vector3.

The Linear and Angular Vector3 represent a vector in free space:

# It is only meant to represent a direction. Therefore, it does not
# make sense to apply a translation to it (e.g., when applying a 
# generic rigid transformation to a Vector3, tf2 will only apply the
# rotation). If you want your data to be translatable too, use the
# geometry_msgs/Point message instead.

Reference: http://docs.ros.org/en/api/geometry_msgs/html/index-msg.html