remove_passed_goals_action.cpp

// Copyright (c) 2021 Samsung Research America
//
// 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.
 
#include <string>
#include <memory>
#include <limits>
 
#include "nav_msgs/msg/path.hpp"
#include "nav2_util/geometry_utils.hpp"
 
#include "nav2_behavior_tree/plugins/action/remove_passed_goals_action.hpp"
 
namespace nav2_behavior_tree
{
 
RemovePassedGoals::RemovePassedGoals(
  const std::string & name,
  const BT::NodeConfiguration & conf)
: BT::ActionNodeBase(name, conf),
  viapoint_achieved_radius_(0.5)
{}
 
void RemovePassedGoals::initialize()
{
  getInput("radius", viapoint_achieved_radius_);
 
  tf_ = config().blackboard->get<std::shared_ptr<tf2_ros::Buffer>>("tf_buffer");
  auto node = config().blackboard->get<rclcpp::Node::SharedPtr>("node");
  node->get_parameter("transform_tolerance", transform_tolerance_);
 
  robot_base_frame_ = BT::deconflictPortAndParamFrame<std::string>(
    node, "robot_base_frame", this);
}
 
inline BT::NodeStatus RemovePassedGoals::tick()
{
  if (!BT::isStatusActive(status())) {
    initialize();
  }
 
  Goals goal_poses;
  getInput("input_goals", goal_poses);
 
  if (goal_poses.empty()) {
    setOutput("output_goals", goal_poses);
    return BT::NodeStatus::SUCCESS;
  }
 
  using namespace nav2_util::geometry_utils;  // NOLINT
 
  geometry_msgs::msg::PoseStamped current_pose;
  if (!nav2_util::getCurrentPose(
      current_pose, *tf_, goal_poses[0].header.frame_id, robot_base_frame_,
      transform_tolerance_))
  {
    return BT::NodeStatus::FAILURE;
  }
 
  double dist_to_goal;
  while (goal_poses.size() > 1) {
    dist_to_goal = euclidean_distance(goal_poses[0].pose, current_pose.pose);
 
    if (dist_to_goal > viapoint_achieved_radius_) {
      break;
    }
 
    goal_poses.erase(goal_poses.begin());
  }
 
  setOutput("output_goals", goal_poses);
 
  return BT::NodeStatus::SUCCESS;
}
 
}  // namespace nav2_behavior_tree
 
#include "behaviortree_cpp/bt_factory.h"
BT_REGISTER_NODES(factory)
{
  factory.registerNodeType<nav2_behavior_tree::RemovePassedGoals>("RemovePassedGoals");
}