cb_navigate_backward.cpp

Go to the documentation of this file.

// Copyright 2021 RobosoftAI Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
/*****************************************************************************************************************
 *
 *   Authors: Pablo Inigo Blasco, Brett Aldrich
 *
 ******************************************************************************************************************/
 
#include <tf2/utils.h>
#include <cl_nav2z/client_behaviors/cb_navigate_backwards.hpp>
#include <cl_nav2z/common.hpp>
#include <cl_nav2z/components/goal_checker_switcher/cp_goal_checker_switcher.hpp>
#include <cl_nav2z/components/odom_tracker/cp_odom_tracker.hpp>
#include <cl_nav2z/components/pose/cp_pose.hpp>
#include <geometry_msgs/msg/quaternion_stamped.hpp>
#include <tf2_geometry_msgs/tf2_geometry_msgs.hpp>
 
namespace cl_nav2z
{
using namespace ::cl_nav2z::odom_tracker;
using namespace smacc2;
 
CbNavigateBackwards::CbNavigateBackwards(float backwardDistance)
{
  if (backwardDistance < 0)
  {
    RCLCPP_ERROR(getLogger(), "[CbNavigateBackwards] distance must be greater or equal than 0");
    this->backwardDistance = 0;
  }
  this->backwardDistance = backwardDistance;
}
 
void CbNavigateBackwards::onEntry()
{
  // straight motion distance
  double dist = backwardDistance;
 
  RCLCPP_INFO_STREAM(
    getLogger(), "[CbNavigateBackwards] Straight backwards motion distance: " << dist);
 
  cl_nav2z::CpPose * p;
  this->requiresComponent(p, ComponentRequirement::HARD);
 
  auto referenceFrame = p->getReferenceFrame();
  auto currentPoseMsg = p->toPoseMsg();
  tf2::Transform currentPose;
  tf2::fromMsg(currentPoseMsg, currentPose);
 
  tf2::Transform backwardDeltaTransform;
  backwardDeltaTransform.setIdentity();
  backwardDeltaTransform.setOrigin(tf2::Vector3(-dist, 0, 0));
 
  tf2::Transform targetPose = currentPose * backwardDeltaTransform;
 
  nav2_msgs::action::NavigateToPose::Goal goal;
  goal.pose.header.frame_id = referenceFrame;
  //goal.pose.header.stamp = getNode()->now();
  tf2::toMsg(targetPose, goal.pose.pose);
  RCLCPP_INFO_STREAM(getLogger(), "[CbNavigateBackwards] TARGET POSE BACKWARDS: " << goal.pose);
 
  geometry_msgs::msg::PoseStamped currentStampedPoseMsg;
  currentStampedPoseMsg.header.frame_id = referenceFrame;
  currentStampedPoseMsg.header.stamp = getNode()->now();
  tf2::toMsg(currentPose, currentStampedPoseMsg.pose);
 
  CpOdomTracker * odomTracker_;
  requiresComponent(odomTracker_, ComponentRequirement::SOFT);
 
  if (odomTracker_ != nullptr)
  {
    this->odomTracker_->clearPath();
    this->odomTracker_->setStartPoint(currentStampedPoseMsg);
    this->odomTracker_->setWorkingMode(WorkingMode::RECORD_PATH);
  }
 
  CpPlannerSwitcher * plannerSwitcher;
  requiresComponent(plannerSwitcher, ComponentRequirement::HARD);
  plannerSwitcher->setBackwardPlanner();
 
  CpGoalCheckerSwitcher * goalCheckerSwitcher;
  requiresComponent(goalCheckerSwitcher, ComponentRequirement::HARD);
  goalCheckerSwitcher->setGoalCheckerId("backward_goal_checker");
 
  this->sendGoal(goal);
}
 
void CbNavigateBackwards::onExit()
{
  if (odomTracker_)
  {
    this->odomTracker_->setWorkingMode(WorkingMode::IDLE);
  }
}
 
}  // namespace cl_nav2z