how can i see the camera in gazebo

[q8wwe]

I'm trying to visualize the camera in gazebo but i run into error : No name given for the robot.

Launch file:

<launch> <arg name="robot_ns" default="/"/> <param name="robot_description" command="$(find xacro)/xacro --inorder '$(find realsense_gazebo_plugin)/urdf/d435.urdf.xacro' use_nominal_extrinsics:=true" /> <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher" > <param name="tf_prefix" type="string" value="/" /> </node> <node pkg="joint_state_publisher" name="joint_state_publisher" type="joint_state_publisher" /> </launch>

[zp2546265641]

how to use?