How to save file to the current directory with roslaunch?

asked 2013-03-04 20:57:36 -0600

741 ●21 ●32 ●42 http://www.cnblogs.com...

i write a simple C++ program to save an image

cv::imwrite(filename,visual_img);

when i run it directly from Eclipse, the image is saved in the current directory (the directory where the Eclipse project file is in). but when i run it with roslaunch

<node pkg="testProg" type="testProg" name="testProg" />

the image is saved in home/.ros

so what should i do to save it to the current directory?

p.s. i encounter the same problem when i try to load the image. always fail to load if i put the image in the current directory when i run it by roslaunch.

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answered 2013-03-05 05:31:58 -0600

Jeremy Zoss

4976 ●48 ●48 ●73 http://rosindustrial.org/

See the attributes section on the roslaunch wiki page.

Using the "cwd" attribute, you can specify that the node should be started using the executable's directory as its working-directory. The default behavior is to use $ROS_HOME directory.

For example:

<launch>
  <node name="test" pkg="my_package" type="my_node" cwd="node" />
</launch>

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a million thanks! it works.

yangyangcv ( 2013-03-05 11:42:20 -0600 )edit

However, it is generally better to use $ROS_HOME subdirectories for files you want to write.

joq ( 2013-03-05 14:31:43 -0600 )edit

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answered 2015-11-11 09:02:55 -0600

lucasw

8729 ●137 ●239 ●256 https://github.com/lucasw

This is what I do to run the nodes in the current directory:

ROS_HOME=`pwd` roslaunch foo.launch

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