Filtered leg detector has missing dependencies; map_laser package is installed in a weird way.

[RohanDwivedi]

ROS Melodic; Ubuntu 18.04.06.

• The leg_detector works well on my system but has lot of false detections.
• So I decided to try out filtered leg detector, but it has a dependency on map laser package.
• Installed the package using sudo apt-get install ros-melodic-map-laser and it worked succesfully.
• Got couple of errors as a result

ERROR: cannot launch node of type [map_laser/filter.py]: Cannot locate node of type [filter.py] in package [map_laser]. Make sure file exists in package path and permission is set to executable (chmod +x)

-- Managed to solve it by sudo cp //opt/ros/melodic/build/map_laser/filter.py //opt/ros/melodic/share/map_laser/ since I figured rospack find coudnt find the python file as it looked only inside the share directory.

[ERROR] [1632140530.856963692]: Bad filter type ScanShadowsFilter. Filter type must be of form <package_name>/<filter_name>

-- Did not yet figure this out at the time of writing, will update if I find a solution.

[RohanDwivedi]

[ERROR] [1632140530.856963692]: Bad filter type ScanShadowsFilter. Filter type must be of form <package_name>/<filter_name>

ros-perception/laser_filters#69
update: had to change type: ScanShadowsFilter to type: laser_filters/ScanShadowsFilter in filters.yaml file