tf2_kdl.h

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/*
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#ifndef TF2_KDL_H
#define TF2_KDL_H

#include <tf2_ros/buffer.h>
#include <kdl/frames.hpp>
#include <geometry_msgs/PointStamped.h>
#include <geometry_msgs/TwistStamped.h>
#include <geometry_msgs/WrenchStamped.h>
#include <geometry_msgs/PoseStamped.h>


namespace tf2
{
    
KDL::Frame transformToKDL(const geometry_msgs::TransformStamped& t)
  {
    return KDL::Frame(KDL::Rotation::Quaternion(t.transform.rotation.x, t.transform.rotation.y, 
                                                t.transform.rotation.z, t.transform.rotation.w),
                      KDL::Vector(t.transform.translation.x, t.transform.translation.y, t.transform.translation.z));
  }


// ---------------------
// Vector
// ---------------------
// this method needs to be implemented by client library developers
template <>
  void doTransform(const tf2::Stamped<KDL::Vector>& t_in, tf2::Stamped<KDL::Vector>& t_out, const geometry_msgs::TransformStamped& transform)
  {
    t_out = tf2::Stamped<KDL::Vector>(transformToKDL(transform) * t_in, transform.header.stamp, transform.header.frame_id);
  }

//convert to vector message
geometry_msgs::PointStamped toMsg(const tf2::Stamped<KDL::Vector>& in)
{
  geometry_msgs::PointStamped msg;
  msg.header.stamp = in.stamp_;
  msg.header.frame_id = in.frame_id_;
  msg.point.x = in[0];
  msg.point.y = in[1];
  msg.point.z = in[2];
  return msg;
}

void fromMsg(const geometry_msgs::PointStamped& msg, tf2::Stamped<KDL::Vector>& out)
{
  out.stamp_ = msg.header.stamp;
  out.frame_id_ = msg.header.frame_id;
  out[0] = msg.point.x;
  out[1] = msg.point.y;
  out[2] = msg.point.z;
}

// ---------------------
// Twist
// ---------------------
// this method needs to be implemented by client library developers
template <>
  void doTransform(const tf2::Stamped<KDL::Twist>& t_in, tf2::Stamped<KDL::Twist>& t_out, const geometry_msgs::TransformStamped& transform)
  {
    t_out = tf2::Stamped<KDL::Twist>(transformToKDL(transform) * t_in, transform.header.stamp, transform.header.frame_id);
  }

//convert to twist message
geometry_msgs::TwistStamped toMsg(const tf2::Stamped<KDL::Twist>& in)
{
  geometry_msgs::TwistStamped msg;
  msg.header.stamp = in.stamp_;
  msg.header.frame_id = in.frame_id_;
  msg.twist.linear.x = in.vel[0];
  msg.twist.linear.y = in.vel[1];
  msg.twist.linear.z = in.vel[2];
  msg.twist.angular.x = in.rot[0];
  msg.twist.angular.y = in.rot[1];
  msg.twist.angular.z = in.rot[2];
  return msg;
}

void fromMsg(const geometry_msgs::TwistStamped& msg, tf2::Stamped<KDL::Twist>& out)
{
  out.stamp_ = msg.header.stamp;
  out.frame_id_ = msg.header.frame_id;
  out.vel[0] = msg.twist.linear.x;
  out.vel[1] = msg.twist.linear.y;
  out.vel[2] = msg.twist.linear.z;
  out.rot[0] = msg.twist.angular.x;
  out.rot[1] = msg.twist.angular.y;
  out.rot[2] = msg.twist.angular.z;
}


// ---------------------
// Wrench
// ---------------------
// this method needs to be implemented by client library developers
template <>
  void doTransform(const tf2::Stamped<KDL::Wrench>& t_in, tf2::Stamped<KDL::Wrench>& t_out, const geometry_msgs::TransformStamped& transform)
  {
    t_out = tf2::Stamped<KDL::Wrench>(transformToKDL(transform) * t_in, transform.header.stamp, transform.header.frame_id);
  }

//convert to wrench message
geometry_msgs::WrenchStamped toMsg(const tf2::Stamped<KDL::Wrench>& in)
{
  geometry_msgs::WrenchStamped msg;
  msg.header.stamp = in.stamp_;
  msg.header.frame_id = in.frame_id_;
  msg.wrench.force.x = in.force[0];
  msg.wrench.force.y = in.force[1];
  msg.wrench.force.z = in.force[2];
  msg.wrench.torque.x = in.torque[0];
  msg.wrench.torque.y = in.torque[1];
  msg.wrench.torque.z = in.torque[2];
  return msg;
}

void fromMsg(const geometry_msgs::WrenchStamped& msg, tf2::Stamped<KDL::Wrench>& out)
{
  out.stamp_ = msg.header.stamp;
  out.frame_id_ = msg.header.frame_id;
  out.force[0] = msg.wrench.force.x;
  out.force[1] = msg.wrench.force.y;
  out.force[2] = msg.wrench.force.z;
  out.torque[0] = msg.wrench.torque.x;
  out.torque[1] = msg.wrench.torque.y;
  out.torque[2] = msg.wrench.torque.z;
}




// ---------------------
// Frame
// ---------------------
// this method needs to be implemented by client library developers
template <>
  void doTransform(const tf2::Stamped<KDL::Frame>& t_in, tf2::Stamped<KDL::Frame>& t_out, const geometry_msgs::TransformStamped& transform)
  {
    t_out = tf2::Stamped<KDL::Frame>(transformToKDL(transform) * t_in, transform.header.stamp, transform.header.frame_id);
  }

//convert to pose message
geometry_msgs::PoseStamped toMsg(const tf2::Stamped<KDL::Frame>& in)
{
  geometry_msgs::PoseStamped msg;
  msg.header.stamp = in.stamp_;
  msg.header.frame_id = in.frame_id_;
  msg.pose.position.x = in.p[0];
  msg.pose.position.y = in.p[1];
  msg.pose.position.z = in.p[2];
  in.M.GetQuaternion(msg.pose.orientation.x, msg.pose.orientation.y, msg.pose.orientation.z, msg.pose.orientation.w);
  return msg;
}

void fromMsg(const geometry_msgs::PoseStamped& msg, tf2::Stamped<KDL::Frame>& out)
{
  out.stamp_ = msg.header.stamp;
  out.frame_id_ = msg.header.frame_id;
  out.p[0] = msg.pose.position.x;
  out.p[1] = msg.pose.position.y;
  out.p[2] = msg.pose.position.z;
  out.M = KDL::Rotation::Quaternion(msg.pose.orientation.x, msg.pose.orientation.y, msg.pose.orientation.z, msg.pose.orientation.w);
}


} // namespace

#endif // TF2_KDL_H