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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 -0500
Seen: 1,901 times
Last updated: Jun 07 '14
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