centroid_publisher_nodelet.cpp

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 *  Copyright (c) 2013, Ryohei Ueda and JSK Lab
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#define BOOST_PARAMETER_MAX_ARITY 7
#include "jsk_pcl_ros/centroid_publisher.h"

#include <geometry_msgs/PoseStamped.h>
#include <geometry_msgs/PointStamped.h>

#include <pcl/common/centroid.h>
#include "jsk_pcl_ros/pcl_conversion_util.h"

namespace jsk_pcl_ros
{
  void CentroidPublisher::extract(const sensor_msgs::PointCloud2ConstPtr& input)
  {
    pcl::PointCloud<pcl::PointXYZ> cloud_xyz;
    pcl::fromROSMsg(*input, cloud_xyz);
    Eigen::Vector4f center;
    pcl::compute3DCentroid(cloud_xyz, center);
    if (publish_tf_) {
      tf::Transform transform;
      transform.setOrigin(tf::Vector3(center[0], center[1], center[2]));
      transform.setRotation(tf::createIdentityQuaternion());
      br_.sendTransform(tf::StampedTransform(transform, input->header.stamp,
                                             input->header.frame_id, frame_));
    }
    geometry_msgs::PoseStamped pose;
    pose.pose.orientation.w = 1.0;
    pose.pose.position.x = center[0];
    pose.pose.position.y = center[1];
    pose.pose.position.z = center[2];
    pose.header = input->header;
    pub_pose_.publish(pose);
    geometry_msgs::PointStamped point;
    point.point.x = center[0];
    point.point.y = center[1];
    point.point.z = center[2];
    point.header = input->header;
    pub_point_.publish(point);
  }

  void CentroidPublisher::subscribe()
  {
    sub_input_ = pnh_->subscribe("input", 1, &CentroidPublisher::extract, this);
  }

  void CentroidPublisher::unsubscribe()
  {
    sub_input_.shutdown();
  }
  
  void CentroidPublisher::onInit(void)
  {
    DiagnosticNodelet::onInit();
    pnh_->param("publish_tf", publish_tf_, false);
    if (publish_tf_) {
      if (!pnh_->getParam("frame", frame_))
      {
        JSK_ROS_WARN("~frame is not specified, using %s", getName().c_str());
        frame_ = getName();
      }
      // do not use DiagnosticNodelet functionality when ~publish_tf is false
      pub_pose_ = pnh_->advertise<geometry_msgs::PoseStamped>("output/pose", 1);
      pub_point_ = pnh_->advertise<geometry_msgs::PointStamped>(
        "output/point", 1);
      subscribe();
    }
    else {
      pub_pose_ = advertise<geometry_msgs::PoseStamped>(*pnh_, "output/pose", 1);
      pub_point_ = advertise<geometry_msgs::PointStamped>(
        *pnh_, "output/point", 1);
    }
  }
}

#include <pluginlib/class_list_macros.h>
PLUGINLIB_EXPORT_CLASS (jsk_pcl_ros::CentroidPublisher, nodelet::Nodelet);