This node will subscribe '/ground_truth' topic which publish absolute obejct information in world.
Please run below command to make a relative information around target centered object.
If target object name is 'cloi1' and tracking id is '1', give an arguments as ros-args like below.
ros2 run perception_genie ground_truth --ros-args -r __ns:=/cloi1 -p tracking_id:=1
Then it will publish the data on '/cloi1/ground_truth' topic.
The publishing data is very simple.
target_object.position - other_object.position
target_object.velocity - other_object.velocity
That's it.