viper850.cpp

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#include <math.h>
#include <sstream>
#include <stdio.h>

#include <geometry_msgs/Pose.h>
#include <geometry_msgs/PoseStamped.h>
#include <geometry_msgs/TwistStamped.h>
#include <nav_msgs/Odometry.h>
#include <ros/ros.h>
#include <sensor_msgs/JointState.h>
#include <std_msgs/Float64MultiArray.h>
#include <tf/tf.h>
#include <tf/transform_broadcaster.h>
#include <tf/transform_datatypes.h>
#include <tf/transform_listener.h>

#include <visp3/core/vpHomogeneousMatrix.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/core/vpMath.h>
#include <visp3/robot/vpRobotViper850.h>

#include <visp_bridge/3dpose.h> // visp_bridge

#ifdef VISP_HAVE_VIPER850

class RosViper850Node
{
public:
  RosViper850Node( ros::NodeHandle n );
  virtual ~RosViper850Node();

public:
  int setup();
  void setCameraVel( const geometry_msgs::TwistStampedConstPtr & );
  void setJointVel( const sensor_msgs::JointStateConstPtr & );
  void setRefVel( const geometry_msgs::TwistStampedConstPtr & );
  void spin();
  void publish();

protected:
  ros::NodeHandle n;
  ros::Publisher pose_pub;
  ros::Publisher vel_pub;
  ros::Publisher jointState_pub;
  ros::Publisher jacobian_pub;
  ros::Subscriber cmd_camvel_sub;
  ros::Subscriber cmd_jointvel_sub;
  ros::Subscriber cmd_refvel_sub;
  std::string setControlMode;  // "joint_space", "camera_frame" (default), "reference_frame"
  std::string getStateSpace;   // "joint_space", "camera_frame" (default), "reference_frame"
  std::string cmdVelTopicName; // default to /cmd_vel
  std::string endEffectorType; // "TOOL_PTGREY_FLEA2_CAMERA" (default), "TOOL_GENERIC_CAMERA", "TOOL_CUSTOM"
  std::string customToolTransformationFileName;

  ros::Time veltime;

  std::string serial_port;

  vpRobotViper850 *robot;
  geometry_msgs::PoseStamped position;
  sensor_msgs::JointState jointState;
  std_msgs::Float64MultiArray jacobian;

  // for odom->base_link transform
  tf::TransformBroadcaster odom_broadcaster;
  geometry_msgs::TransformStamped odom_trans;
  // for resolving tf names.
  std::string tf_prefix;
  std::string frame_id_odom;
  std::string frame_id_base_link;

  vpHomogeneousMatrix wMc; // world to camera transformation
  vpColVector q;           // measured joint position
};

RosViper850Node::RosViper850Node( ros::NodeHandle nh )
{
  // read in config options
  n = nh;

  ROS_INFO( "Launch Viper850 robot ros node" );

  robot = NULL;
  n.param< std::string >( "set_control_mode", setControlMode, "tool_frame" );
  n.param< std::string >( "get_state_space", getStateSpace, "tool_frame" );
  n.param< std::string >( "cmd_vel_topic_name", cmdVelTopicName, "cmd_vel" );
  n.param< std::string >( "end_effector", endEffectorType, "TOOL_PTGREY_FLEA2_CAMERA" );
  n.param< std::string >( "custom_tool_transformation_filename", customToolTransformationFileName, "" );

  /*
   * Figure out what frame_id's to use. if a tf_prefix param is specified,
   * it will be added to the beginning of the frame_ids.
   *
   * e.g. rosrun ... _tf_prefix:=MyRobot (or equivalently using <param>s in
   * roslaunch files)
   * will result in the frame_ids being set to /MyRobot/odom etc,
   * rather than /odom. This is useful for Multi Robot Systems.
   * See ROS Wiki for further details.
   */
  tf_prefix = tf::getPrefixParam( n );
  //  frame_id_odom = tf::resolve(tf_prefix, "odom");
  //  frame_id_base_link = tf::resolve(tf_prefix, "base_link");

  // advertise services
  //  pose_pub = n.advertise<geometry_msgs::PoseStamped>("pose", 1000);
  //  vel_pub = n.advertise<geometry_msgs::TwistStamped>("velocity", 1000);
  //  jointState_pub = n.advertise<sensor_msgs::JointState>("joint_state", 1000);

  // subscribe to services
  if ( setControlMode == "joint_space" )
  {
    ROS_INFO( "Viper850 robot controlled in joint space" );
    jointState_pub   = n.advertise< sensor_msgs::JointState >( "joint_state", 10 );
    jacobian_pub     = n.advertise< std_msgs::Float64MultiArray >( "jacobian", 10 );
    cmd_jointvel_sub = n.subscribe( cmdVelTopicName, 1,
                                    (boost::function< void( const sensor_msgs::JointStateConstPtr & ) >)boost::bind(
                                        &RosViper850Node::setJointVel, this, _1 ) );
  }
  else if ( setControlMode == "camera_frame" )
  {
    ROS_INFO( "Viper850 robot controlled in camera frame" );
    pose_pub       = n.advertise< geometry_msgs::PoseStamped >( "pose", 10 );
    vel_pub        = n.advertise< geometry_msgs::TwistStamped >( "velocity", 10 );
    cmd_camvel_sub = n.subscribe( cmdVelTopicName, 1,
                                  (boost::function< void( const geometry_msgs::TwistStampedConstPtr & ) >)boost::bind(
                                      &RosViper850Node::setCameraVel, this, _1 ) );
  }
  else if ( setControlMode == "reference_frame" )
  {
    ROS_INFO( "Viper850 robot controlled in reference frame" );
    pose_pub       = n.advertise< geometry_msgs::PoseStamped >( "pose", 10 );
    vel_pub        = n.advertise< geometry_msgs::TwistStamped >( "velocity", 10 );
    cmd_refvel_sub = n.subscribe( cmdVelTopicName, 1,
                                  (boost::function< void( const geometry_msgs::TwistStampedConstPtr & ) >)boost::bind(
                                      &RosViper850Node::setRefVel, this, _1 ) );
  }
}

RosViper850Node::~RosViper850Node()
{
  if ( robot )
  {
    robot->stopMotion();
    delete robot;
    robot = NULL;
  }
}

int
RosViper850Node::setup()
{
  robot = new vpRobotViper850;

  if ( endEffectorType == "TOOL_PTGREY_FLEA2_CAMERA" )
  {
    robot->init( vpViper850::TOOL_PTGREY_FLEA2_CAMERA, vpCameraParameters::perspectiveProjWithDistortion );
  }
  else if ( endEffectorType == "TOOL_GENERIC_CAMERA" )
  {
    robot->init( vpViper850::TOOL_GENERIC_CAMERA, vpCameraParameters::perspectiveProjWithDistortion );
  }
  else if ( endEffectorType == "TOOL_CUSTOM" )
  {
    if ( vpIoTools::checkFilename( customToolTransformationFileName ) == false )
    {
      ROS_ERROR( "Viper850: Missing or bad filename for eMt custom tool transformation" );
      return -1;
    }

    vpHomogeneousMatrix eMt;
    std::ifstream f( customToolTransformationFileName.c_str() );
    try
    {
      eMt.load( f );
      f.close();
    }
    catch ( vpException &e )
    {
      ROS_ERROR_STREAM( "Viper850: Cannot load eMt custom tool transformation from \""
                        << customToolTransformationFileName << "\": " << e.getStringMessage() );
      f.close();
      return -1;
    }

    robot->init( vpViper850::TOOL_CUSTOM, eMt );
  }

  robot->setRobotState( vpRobot::STATE_VELOCITY_CONTROL );

  return 0;
}

void
RosViper850Node::spin()
{
  ros::Rate loop_rate( 100 );
  while ( ros::ok() )
  {
    this->publish();
    ros::spinOnce();
    loop_rate.sleep();
  }
}

void
RosViper850Node::publish()
{
  double timestamp;
  robot->getPosition( vpRobot::ARTICULAR_FRAME, q, timestamp );

  if ( getStateSpace == "joint_space" )
  {
    vpColVector qdot;
    robot->getVelocity( vpRobot::ARTICULAR_FRAME, qdot, timestamp );
    jointState.position.clear();
    jointState.velocity.clear();
    jointState.header.stamp = ros::Time( timestamp );
    for ( unsigned int i = 0; i < qdot.size(); i++ )
    {
      jointState.position.push_back( q[i] );
      jointState.velocity.push_back( qdot[i] );
    }
    jointState_pub.publish( jointState );

    vpMatrix eJe;
    robot->get_eJe( eJe );
    vpHomogeneousMatrix eMc;
    robot->get_eMc( eMc );
    vpMatrix cJc = vpVelocityTwistMatrix( eMc.inverse() ) * eJe;

    jacobian.data.clear();
    jacobian.layout.dim.resize( 2 );

    jacobian.layout.dim[0].label  = "height";
    jacobian.layout.dim[0].size   = cJc.getRows();
    jacobian.layout.dim[0].stride = cJc.size();
    jacobian.layout.dim[1].label  = "width";
    jacobian.layout.dim[1].size   = cJc.getCols();
    jacobian.layout.dim[1].stride = cJc.getCols();
    for ( unsigned int i = 0; i < cJc.size(); i++ )
      jacobian.data.push_back( cJc.data[i] );
    jacobian_pub.publish( jacobian );
  }
  else if ( getStateSpace == "camera_frame" )
  {
    wMc                   = robot->get_fMc( q );
    position.pose         = visp_bridge::toGeometryMsgsPose( wMc );
    position.header.stamp = ros::Time( timestamp ); // to improve: should be the timestamp returned by getPosition()

    //  ROS_INFO( "Viper850 publish pose at %f s: [%0.2f %0.2f %0.2f] - [%0.2f %0.2f %0.2f %0.2f]",
    //            position.header.stamp.toSec(),
    //            position.pose.position.x, position.pose.position.y, position.pose.position.z,
    //            position.pose.orientation.w, position.pose.orientation.x, position.pose.orientation.y,
    //            position.pose.orientation.z);
    pose_pub.publish( position );

    vpColVector vel( 6 );
    robot->getVelocity( vpRobot::CAMERA_FRAME, vel, timestamp );
    geometry_msgs::TwistStamped vel_msg;
    vel_msg.header.stamp    = ros::Time( timestamp );
    vel_msg.twist.linear.x  = vel[0];
    vel_msg.twist.linear.y  = vel[1];
    vel_msg.twist.linear.z  = vel[2];
    vel_msg.twist.angular.x = vel[3];
    vel_msg.twist.angular.y = vel[4];
    vel_msg.twist.angular.z = vel[5];
    vel_pub.publish( vel_msg );
  }
  else if ( getStateSpace == "reference_frame" )
  {
    wMc                   = robot->get_fMc( q );
    position.pose         = visp_bridge::toGeometryMsgsPose( wMc );
    position.header.stamp = ros::Time( timestamp ); // to improve: should be the timestamp returned by getPosition()

    //  ROS_INFO( "Viper850 publish pose at %f s: [%0.2f %0.2f %0.2f] - [%0.2f %0.2f %0.2f %0.2f]",
    //            position.header.stamp.toSec(),
    //            position.pose.position.x, position.pose.position.y, position.pose.position.z,
    //            position.pose.orientation.w, position.pose.orientation.x, position.pose.orientation.y,
    //            position.pose.orientation.z);
    pose_pub.publish( position );

    vpColVector vel( 6 );
    robot->getVelocity( vpRobot::REFERENCE_FRAME, vel, timestamp );
    geometry_msgs::TwistStamped vel_msg;
    vel_msg.header.stamp    = ros::Time( timestamp );
    vel_msg.twist.linear.x  = vel[0];
    vel_msg.twist.linear.y  = vel[1];
    vel_msg.twist.linear.z  = vel[2];
    vel_msg.twist.angular.x = vel[3];
    vel_msg.twist.angular.y = vel[4];
    vel_msg.twist.angular.z = vel[5];
    vel_pub.publish( vel_msg );
  }
}

void
RosViper850Node::setCameraVel( const geometry_msgs::TwistStampedConstPtr &msg )
{
  veltime = ros::Time::now();

  vpColVector vc( 6 ); // Vel in m/s and rad/s

  vc[0] = msg->twist.linear.x;
  vc[1] = msg->twist.linear.y;
  vc[2] = msg->twist.linear.z;

  vc[3] = msg->twist.angular.x;
  vc[4] = msg->twist.angular.y;
  vc[5] = msg->twist.angular.z;

  ROS_INFO( "Viper850 new camera vel at %f s: [%0.2f %0.2f %0.2f] m/s [%0.2f %0.2f %0.2f] rad/s", veltime.toSec(),
            vc[0], vc[1], vc[2], vc[3], vc[4], vc[5] );
  robot->setVelocity( vpRobot::CAMERA_FRAME, vc );
}

void
RosViper850Node::setJointVel( const sensor_msgs::JointStateConstPtr &msg )
{
  veltime = ros::Time::now();

  if ( msg->velocity.size() != 6 )
  {
    ROS_ERROR( "Viper850: Cannot apply a joint velocity vector that is not 6 dimensional" );
    return;
  }
  vpColVector qdot( 6 ); // Vel in rad/s for each joint

  for ( unsigned int i = 0; i < msg->velocity.size(); i++ )
    qdot[i] = msg->velocity[i];

  ROS_INFO( "Viper850 new joint vel at %f s: [%0.2f %0.2f %0.2f %0.2f %0.2f %0.2f] rad/s", veltime.toSec(), qdot[0],
            qdot[1], qdot[2], qdot[3], qdot[4], qdot[5] );

  robot->setVelocity( vpRobot::ARTICULAR_FRAME, qdot );
}

void
RosViper850Node::setRefVel( const geometry_msgs::TwistStampedConstPtr &msg )
{
  veltime = ros::Time::now();

  vpColVector vref( 6 ); // Vel in m/s and rad/s

  vref[0] = msg->twist.linear.x;
  vref[1] = msg->twist.linear.y;
  vref[2] = msg->twist.linear.z;

  vref[3] = msg->twist.angular.x;
  vref[4] = msg->twist.angular.y;
  vref[5] = msg->twist.angular.z;

  ROS_INFO( "Viper850 new reference vel at %f s: [%0.2f %0.2f %0.2f] m/s [%0.2f %0.2f %0.2f] rad/s", veltime.toSec(),
            vref[0], vref[1], vref[2], vref[3], vref[4], vref[5] );
  robot->setVelocity( vpRobot::REFERENCE_FRAME, vref );
}

#endif // #ifdef VISP_HAVE_Viper850

int
main( int argc, char **argv )
{
#ifdef VISP_HAVE_VIPER850
  ros::init( argc, argv, "RosViper850" );
  ros::NodeHandle n( std::string( "~" ) );

  RosViper850Node *node = new RosViper850Node( n );

  if ( node->setup() != 0 )
  {
    printf( "Viper850 setup failed... \n" );
    return -1;
  }

  node->spin();

  delete node;

  printf( "\nQuitting... \n" );
#else
  printf( "The Viper850 robot is not supported by ViSP...\n" );
#endif
  return 0;
}