<launch>
   <arg name="model" default="$(find kubot_description)/urdf/kubot.urdf.xacro"/>
   <arg name="world" default="$(find kubot_description)/worlds/ku_lab/ku_model.sdf"/>
   <!-- <arg name="world" default="empty_world"/> -->
   
   <param name="robot_description" command="$(find xacro)/xacro '$(find turtlebot_description)/urdf/turtlebot.urdf.xacro'" />
   
    <include file="$(find gazebo_ros)/launch/empty_world.launch">
        <arg name="world_name" value="$(arg world)"/>
        <arg name="paused" value="false"/>
        <arg name="use_sim_time" value="true"/>
        <arg name="gui" value="true"/>
        <arg name="recording" value="false"/>
        <arg name="debug" value="false"/>
    </include>

    <node pkg="gazebo_ros" type="spawn_model" name="spawn_model"
        args="-unpause -urdf -model robot -param robot_description"
        output="screen" respawn="false"/>

</launch>