Hello, I am using rviz and ROS groovy with turtlebots, Is there a simple explanation of how to bring up 2 robots on rviz. I have created a 2-d map of the room I am working in and I can bring up both of the robots up on rviz, but only one at a time. The only launch command I know are these 2.

On robot I bring up my robot on the map I create by using: roslaunch turtlebotnavigation amcldemo.launch mapfile:=/tmp/mymap.yaml

Then on the workstation using rviz I run this command: roslaunch turtlebotrvizlaunchers view_navigation.launch --screen

The workstation brings up the turtlebot that it has listed as it's ROSMASTERURI.

My question is, how can you bring up 2 robots on rviz ? I seen this multi master thing but I don't think it is neccessary.

Any help is appreciated.

Thank you.