| ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
I'm starting with launch files and I couldn't find any tutorial about it. If you can share any paper, guide or explanatory website I would really appreciate it.
In addition, I want to put an "if" inside the launch file in order to create a node only IF it doesn't exits yet. ¿How can I do it?
I'm starting with launch files and I couldn't find any tutorial about it.
Have you tried the roslaunch wiki page? The Tutorials section should help you get started.
In addition, I want to put an "if" inside the launch file in order to create a node only IF it doesn't exits yet. ¿How can I do it?
Roslaunch cannot check for the (non)existence of a specific node. There is partial support for conditionals (if and unless), but it is used for conditional inclusion / evaluation.
you can use this tutorial for starting with launch file.
if="$(eval not [s for s in eval('_' + '_import_' + '_(\'rosnode\')').get_node_names() if 'NODE_NAME' in s])"
In addition you can't run two node with the same name, so by the way it's not possible to have two same node running at a time !
Asked: 2014-06-06 08:18:39 -0600
Seen: 1,991 times
Last updated: Jun 07 '14
ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
