GazeboRosVelodyneLaser.h

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#ifndef GAZEBO_ROS_VELODYNE_LASER_H_
#define GAZEBO_ROS_VELODYNE_LASER_H_

// Custom Callback Queue
#include <ros/ros.h>
#include <ros/callback_queue.h>
#include <ros/advertise_options.h>

#include <sdf/Param.hh>
#include <gazebo/physics/physics.hh>
#include <gazebo/transport/TransportTypes.hh>
#include <gazebo/msgs/MessageTypes.hh>

#include <gazebo/common/Time.hh>
#include <gazebo/common/Plugin.hh>
#include <gazebo/sensors/SensorTypes.hh>
#include <gazebo/plugins/RayPlugin.hh>

#include <boost/bind.hpp>
#include <boost/thread.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/lock_guard.hpp>

namespace gazebo
{

  class GazeboRosVelodyneLaser : public RayPlugin
  {
    public: GazeboRosVelodyneLaser();

    public: ~GazeboRosVelodyneLaser();

    public: void Load(sensors::SensorPtr _parent, sdf::ElementPtr _sdf);

    private: void ConnectCb();

    private: sensors::RaySensorPtr parent_ray_sensor_;

    private: ros::NodeHandle* nh_;

    private: ros::Publisher pub_;

    private: std::string topic_name_;

    private: std::string frame_name_;

    private: double min_range_;

    private: double max_range_;

    private: double gaussian_noise_;

    private: static double gaussianKernel(double mu, double sigma)
    {
      // using Box-Muller transform to generate two independent standard normally distributed normal variables
      // see wikipedia
      double U = (double)rand() / (double)RAND_MAX; // normalized uniform random variable
      double V = (double)rand() / (double)RAND_MAX; // normalized uniform random variable
      return sigma * (sqrt(-2.0 * ::log(U)) * cos(2.0 * M_PI * V)) + mu;
    }

    private: boost::mutex lock_;

    private: std::string robot_namespace_;

    // Custom Callback Queue
    private: ros::CallbackQueue laser_queue_;
    private: void laserQueueThread();
    private: boost::thread callback_laser_queue_thread_;

    // Subscribe to gazebo laserscan
    private: gazebo::transport::NodePtr gazebo_node_;
    private: gazebo::transport::SubscriberPtr sub_;
    private: void OnScan(const ConstLaserScanStampedPtr &_msg);

  };

} // namespace gazebo

#endif /* GAZEBO_ROS_VELODYNE_LASER_H_ */