tf_link_updater.cpp

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/*
 * Copyright (c) 2009, Willow Garage, Inc.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
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 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
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 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#include "tf_link_updater.h"
#include "frame_manager.h"

#include <tf/tf.h>

#include <OGRE/OgreVector3.h>
#include <OGRE/OgreQuaternion.h>

namespace rviz
{

TFLinkUpdater::TFLinkUpdater(FrameManager* frame_manager, const StatusCallback& status_cb, const std::string& tf_prefix)
: frame_manager_(frame_manager)
, status_callback_(status_cb)
, tf_prefix_(tf_prefix)
{
}

bool TFLinkUpdater::getLinkTransforms(const std::string& _link_name, Ogre::Vector3& visual_position, Ogre::Quaternion& visual_orientation,
                                      Ogre::Vector3& collision_position, Ogre::Quaternion& collision_orientation) const
{
  std::string link_name = _link_name;
  if (!tf_prefix_.empty())
  {
    link_name = tf::resolve(tf_prefix_, link_name);
  }

  Ogre::Vector3 position;
  Ogre::Quaternion orientation;
  if (!frame_manager_->getTransform(link_name, ros::Time(), position, orientation))
  {
    std::stringstream ss;
    ss << "No transform from [" << link_name << "] to [" << frame_manager_->getFixedFrame() << "]";
    setLinkStatus(StatusProperty::Error, link_name, ss.str());
    return false;
  }

  setLinkStatus(StatusProperty::Ok, link_name, "Transform OK");

  // Collision/visual transforms are the same in this case
  visual_position = position;
  visual_orientation = orientation;
  collision_position = position;
  collision_orientation = orientation;

  return true;
}

void TFLinkUpdater::setLinkStatus(StatusLevel level, const std::string& link_name, const std::string& text) const
{
  if (status_callback_)
  {
    status_callback_(level, link_name, text);
  }
}

}