Simulation

Installation

First check your current version of ROS by simply typing in the following command:
<syntaxhighlight lang="bash" line='line'> rosversion -d </syntaxhighlight>

ROS::Indigo Installation

Installation guide for ROS Indigo can be found at the following link: http://wiki.ros.org/indigo/Installation/Ubuntu

Before cloning, Some dependencies are needed if not already installed:
<syntaxhighlight lang="bash" line='line'> sudo apt-get install ros-<distro>-ros-control ros-<distro>-ros-controllers ros-<distro>-gazebo-ros ros-<distro>-gazebo-ros-control ros-<distro>-gazebo-ros-pkgs ros-<distro>-controller-manager ros-<distro>-gazebo-plugins ros-<distro>-hector-gazebo ros-<distro>-hector-gazebo-plugins ros-<distro>-ackermann-msgs </syntaxhighlight>

Next you should go ahead and create a catkin workspace:
<syntaxhighlight lang="bash" line='line'> source /opt/ros/<distro>/setup.bash mkdir -p ~/hamster_simulation/src cd ~/hamster_simulation/src catkin_init_workspace </syntaxhighlight> Now we can clone the Hamster simulation source code into the new workspace and make it:
<syntaxhighlight lang="bash" line='line'> git clone https://github.com/cogniteam/hamster_simulation.git cd ~/hamster_simulation catkim_make </syntaxhighlight>

Launching

Before continuing, source your workspace.
<syntaxhighlight lang="bash" line='line'> source ~/hamster_simulation/devel/setup.bash </syntaxhighlight>

The launch file contains hamster_vehicle.launch which runs one agent called agent1 You can add more agents by editing the launch file.

Also, the launch file launches a joystick node if any is connected as working on /dev/js* To launch Gazebo, type in the following command:
<syntaxhighlight lang="bash" line='line'> roslaunch hamster_vehicle_gazebo hamster_vehicle.launch </syntaxhighlight>

Available Topics

You should see something like this: <agent> = agent1 on default

• Camera - /<agent>/image_raw/
• GPS - /<agent>/gps
• IMU - /<agent>/imu
• Lidar - /<agent>/scan_raw
• Speed Commands (Ackermann) - /<agent>/ackermann_cmd