tf2_bullet.h

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/*
 * Copyright (c) 2008, Willow Garage, Inc.
 * All rights reserved.
 *
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 * modification, are permitted provided that the following conditions are met:
 *
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 *     * Redistributions in binary form must reproduce the above copyright
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 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef TF2_BULLET_H
#define TF2_BULLET_H

#include <tf2_ros/buffer.h>
#include <LinearMath/btTransform.h>
#include <geometry_msgs/PointStamped.h>


namespace tf2
{
    
btTransform transformToBullet(const geometry_msgs::TransformStamped& t)
  {
    return btTransform(btQuaternion(t.transform.rotation.x, t.transform.rotation.y, 
                                    t.transform.rotation.z, t.transform.rotation.w),
                       btVector3(t.transform.translation.x, t.transform.translation.y, t.transform.translation.z));
  }


// this method needs to be implemented by client library developers
template <>
  void doTransform(const tf2::Stamped<btVector3>& t_in, tf2::Stamped<btVector3>& t_out, const geometry_msgs::TransformStamped& transform)
  {
    t_out = tf2::Stamped<btVector3>(transformToBullet(transform) * t_in, transform.header.stamp, transform.header.frame_id);
  }

//convert to vector message
geometry_msgs::PointStamped toMsg(const tf2::Stamped<btVector3>& 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<btVector3>& 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;
}


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


} // namespace

#endif // TF2_BULLET_H