In ROS there is a URDF file (Universal Robot Description File) which allows the robot visualization application to show a symbolic robot and the robot and state publishers to update where the robot parts are located as the robot moves.
These files can be amazingly complex to get the values correct for every part of a robot to appear in the correct place, and for sensor data to be accurate.
Over the years I have created #GoPiGo3 #URDF files. Today the GoPi5Go-Dave file:
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