robot-state-publisher

To publish URDF to TF transforms in ROS 2, load your URDF into the robot_description parameter and use a LaunchDescription to start robot_state_publisher, which automatically publishes dynamic and static frames to the /tf and /tf_static topics.

Visualizing a URDF robot model in RViz requires robot_state_publisher to publish the URDF on the /robot_description topic and output TF transforms, allowing RViz to render the robot's geometry and coordinate frames accurately.

Yes, you need joint_state_publisher alongside robot_state_publisher to simulate movable joints in ROS 2, as it provides default joint states that allow robot_state_publisher to calculate and broadcast dynamic TF transforms for testing.

Yes, you can use robot_state_publisher for multi-robot TF setups in ROS 2 by configuring frame_prefix and namespaces, allowing multiple robots to publish distinct URDF transforms and robot descriptions simultaneously without frame conflicts.

RViz shows missing TF frames when the robot_description parameter lacks a correctly formatted URDF or the LaunchDescription fails to properly initialize robot_state_publisher to broadcast the necessary static and dynamic transforms.