Hey i´m not very experienced in ROS an Gazebo, but i wanted to ask if somebody could maybe help me. I´m using the workspace from a gazebo tutorial in which a laserscanner can be used. You can find the workspace under this link: [link text](https://github.com/ros-simulation/gazebo_ros_demos).
I placed the Laserscanner in front of the RRBot and in the air. I changed the origin and set the parent link to "world" so that the laser is no longer attached to the robot. I would like to have a message or a topic, that can make the robot stop when it crosses the "light barrier" from the laserscanner. Is this possible?
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