I am sorry for my poor English.
I am a beginner at ROS and ROS navigation stack. I would like to know what `double MoveBase::distance(const geometry_msgs::PoseStamped& p1, const geometry_msgs::PoseStamped& p2)` means , which is a function in move_base.cpp. Does it mean the distance from a present point to a goal point?
In addition, I would also like to know the meaning of `geometry_msgs::PoseStamped`. Is it a self position?
I would appreciate it if you could answer my question.
Thank you.
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