Implementation of a simulation API for Mars and Moon terrain with a skid steering (Pathfinder) and 4WS (Moontamer) rover

if you face an error about four_wheel_steering_msgs after catkin_make, run

rosdep install --from-paths src --ignore-src -r -y

To launch the Moontamer rover in Gazebo (Moon environment)

roslaunch moontamer_gazebo empty_world.launch

To drive the Moontamer rover, you can use a joystick, or simply

rostopic pub /joy_teleop/cmd_four_wheel_steering four_wheel_steering_msgs/FourWheelSteering "{front_steering_angle: 0.0, rear_steering_angle: 0.0, front_steering_angle_velocity: 0.0,rear_steering_angle_velocity: 0.0, speed: 0.0, acceleration: 0.0, jerk: 0.0}" -r10

With above rostopic pub command, you can change the steering angles, and speed of the rover. The rover is capable of doing Ackermann, skid steering, holonomic, and crab-walk driving.