Hello,

As the subject said, what is the purpose of unpause argument in gazeboros spawnmodel?

edit

I test the below code, but -pause, -unpause or without this argument seems like have no difference, the Gazebo is always unpaused.

  <node name="urdf_spawner" pkg="gazebo_ros" type="spawn_model"
    args="-pause
          -urdf
          -model ridgeback
          -param robot_description
          -x 0
          -y 0
          -z 1 " />