laser_scan_assembler_srv.cpp

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#include "laser_geometry/laser_geometry.h"
#include "sensor_msgs/LaserScan.h"
#include "laser_assembler/base_assembler_srv.h"
#include "filters/filter_chain.h"

using namespace laser_geometry;
using namespace std ;

namespace laser_assembler
{

class LaserScanAssemblerSrv : public BaseAssemblerSrv<sensor_msgs::LaserScan>
{
public:
  LaserScanAssemblerSrv() : filter_chain_("sensor_msgs::LaserScan")
  {
    // ***** Set Laser Projection Method *****
    private_ns_.param("ignore_laser_skew", ignore_laser_skew_, true);

    // configure the filter chain from the parameter server
    filter_chain_.configure("filters", private_ns_);
  }

  ~LaserScanAssemblerSrv()
  {

  }

  unsigned int GetPointsInScan(const sensor_msgs::LaserScan& scan)
  {
    return scan.ranges.size();
  }

  void ConvertToCloud(const string& fixed_frame_id, const sensor_msgs::LaserScan& scan_in, sensor_msgs::PointCloud& cloud_out)
  {
    // apply filters on laser scan
    filter_chain_.update (scan_in, scan_filtered_);

    // convert laser scan to point cloud
    if (ignore_laser_skew_)  // Do it the fast (approximate) way
    {
      projector_.projectLaser(scan_filtered_, cloud_out);
      if (cloud_out.header.frame_id != fixed_frame_id)
        tf_->transformPointCloud(fixed_frame_id, cloud_out, cloud_out);
    }
    else                     // Do it the slower (more accurate) way
    {
      int mask = laser_geometry::channel_option::Intensity + laser_geometry::channel_option::Distance + laser_geometry::channel_option::Index + laser_geometry::channel_option::Timestamp;
      projector_.transformLaserScanToPointCloud (fixed_frame_id, scan_filtered_, cloud_out, *tf_, mask);
    }
    return;
  }

private:
  bool ignore_laser_skew_;
  laser_geometry::LaserProjection projector_;

  filters::FilterChain<sensor_msgs::LaserScan> filter_chain_;
  mutable sensor_msgs::LaserScan scan_filtered_;

};

}

using namespace laser_assembler ;

int main(int argc, char **argv)
{
  ros::init(argc, argv, "laser_scan_assembler");
  ros::NodeHandle n;
  ROS_WARN("The laser_scan_assembler_srv is deprecated. Please switch to "
           "using the laser_scan_assembler. Documentation is available at "
           "http://www.ros.org/wiki/laser_assembler");
  LaserScanAssemblerSrv pc_assembler;
  pc_assembler.start();
  ros::spin();

  return 0;
}