triplesim.launch

<launch>
<include
  file="$(find agitr)/doublesim.launch"
/>
<arg
   name="use_sim3"
   default="0"
/>

<group ns="sim3" if="$(arg use_sim3)">
<node
   name="turtlesim_node"
   pkg="turtlesim"
   type="turtlesim_node"
/>
<node
   pkg="turtlesim"
   type="turtle_teleop_key"
   name="teleop_key"
   required="true"
   launch-prefix="xterm -e"
/>
</group>
</launch>