source install/setup.bash not working

[javiermoviglia]

Hello,

I have followed your instructions to connect Slicer with ROS but for some reason when doing source install/setup.bash in the workspace where slicer_ros2_module is located I get the following error:

not found: "/home/javier/ros2_ws/install/slicer_ros2_module/share/slicer_ros2_module/local_setup.bash"

I have tried it with ROS2 galactic and foxy but still get the same error. I suspect that the problem is in the CMakelist.txt file but maybe you have solved it in another way.

Useful information:

• colcon build works fine (only some warnings due to vtkSlicerRos2Logic code)
• with the two ways described to build the package (colcon build and cmake) I get the same results
• I have tested it with both Slicer 5.0.3 and 5.1.0 (with build)
• The files found in the path "/home/javier/ros2_ws/install/slicer_ros2_module/share/slicer_ros2_module/" are the following:

package.bash
package.dsv
package.ps1
package.sh
package.zsh

Thank you in advance for the help.

Best regards,
Javier

[javiermoviglia]

I forgot to mention, that the Ros2 module can be loaded in Slicer despite the previous error, but the robot cannot be displayed.

Configuration

• Module: Ros2
• State: tf2
• Param Selected: /robot_state_publisher and robot_description
• Test Robot: https://docs.ros.org/en/foxy/Tutorials/Intermediate/URDF/Using-URDF-with-Robot-State-Publisher.html

Debug

• ros2 topic list
  /joint_states
  /parameter_events
  /robot_description
  /rosout
  /tf
  /tf_static

• ros2 node list
  /robot_state_publisher
  /state_publisher
  /transform_listener_impl_55**
  /vtkSlicerRos2Logic

[adeguet1]

Regarding the script local_setup.bash not being found, I've noticed this on my end but I don't think it will cause any issues. Regarding the robot not being displayed, the current code only support geometries based on CAD files using either STL or OBJ (formats supported in Slicer). I looked at the URDF file for the R2D2 robot you're using and it's not using meshes for the visual. Excerpt:

    <visual>
      <origin xyz="0 0 0" rpy="1.57 0 0" />
      <geometry>
        <cylinder radius="0.01" length=".5" />
      </geometry>
      <material name="gray">
        <color rgba=".2 .2 .2 1" />
      </material>
    </visual>

We used two different robots for our testing, Phantom Omni and dVRK PSM. I will try to update the README ASAP to show how to use these with the SlicerROS2 module.

[javiermoviglia]

Thanks for the quick reply. I have just tested it with the dVRK PSM Robot from your repository but I still haven't been able to diplay this one in Slicer. An update of the README would be very helpful.

[adeguet1]

I updated the README and added some links to the Phantom Omni models. Let us know if the new instructions help. For the dVRK PSM, I need to update the ROS dVRK launch files first. I will then test with the Slicer ROS 2 module before updating the dVRK section in the README.

[javiermoviglia]

it works now! (at least in ROS galactic) The trick was just hit enter on /robot_state_publisher. Maybe it's obvious but you could add in the section "Using the Slicer ROS 2 module" that first you have to do "source /opt/ros/galactic/setup.bash" in the Slicer terminal. Thanks for the help!

[javiermoviglia]

I just tried it quickly on foxy with this robot https://github.com/olmerg/lesson_urdf and it works too. 👍