nav2_smoother.hpp

// Copyright (c) 2021 RoboTech Vision
// Copyright (c) 2019 Intel Corporation
//
// 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.
 
#ifndef NAV2_SMOOTHER__NAV2_SMOOTHER_HPP_
#define NAV2_SMOOTHER__NAV2_SMOOTHER_HPP_
 
#include <memory>
#include <string>
#include <thread>
#include <unordered_map>
#include <vector>
 
#include "nav2_core/smoother.hpp"
#include "nav2_costmap_2d/costmap_2d_ros.hpp"
#include "nav2_costmap_2d/costmap_subscriber.hpp"
#include "nav2_costmap_2d/costmap_topic_collision_checker.hpp"
#include "nav2_costmap_2d/footprint_subscriber.hpp"
#include "nav2_msgs/action/smooth_path.hpp"
#include "nav2_util/lifecycle_node.hpp"
#include "nav2_util/robot_utils.hpp"
#include "nav2_util/simple_action_server.hpp"
#include "pluginlib/class_list_macros.hpp"
#include "pluginlib/class_loader.hpp"
 
namespace nav2_smoother
{
 
class SmootherServer : public nav2_util::LifecycleNode
{
public:
  using SmootherMap = std::unordered_map<std::string, nav2_core::Smoother::Ptr>;
 
  explicit SmootherServer(const rclcpp::NodeOptions & options = rclcpp::NodeOptions());
  ~SmootherServer();
 
protected:
  nav2_util::CallbackReturn on_configure(const rclcpp_lifecycle::State & state) override;
 
  bool loadSmootherPlugins();
 
  nav2_util::CallbackReturn on_activate(const rclcpp_lifecycle::State & state) override;
 
  nav2_util::CallbackReturn on_deactivate(const rclcpp_lifecycle::State & state) override;
 
  nav2_util::CallbackReturn on_cleanup(const rclcpp_lifecycle::State & state) override;
 
  nav2_util::CallbackReturn on_shutdown(const rclcpp_lifecycle::State & state) override;
 
  using Action = nav2_msgs::action::SmoothPath;
  using ActionResult = Action::Result;
  using ActionServer = nav2_util::SimpleActionServer<Action>;
 
  void smoothPlan();
 
  bool findSmootherId(const std::string & c_name, std::string & name);
 
  bool validate(const nav_msgs::msg::Path & path);
 
  // Our action server implements the SmoothPath action
  std::unique_ptr<ActionServer> action_server_;
 
  // Transforms
  std::shared_ptr<tf2_ros::Buffer> tf_;
  std::shared_ptr<tf2_ros::TransformListener> transform_listener_;
 
  // Publishers and subscribers
  rclcpp_lifecycle::LifecyclePublisher<nav_msgs::msg::Path>::SharedPtr plan_publisher_;
 
  // Smoother Plugins
  pluginlib::ClassLoader<nav2_core::Smoother> lp_loader_;
  SmootherMap smoothers_;
  std::vector<std::string> default_ids_;
  std::vector<std::string> default_types_;
  std::vector<std::string> smoother_ids_;
  std::vector<std::string> smoother_types_;
  std::string smoother_ids_concat_, current_smoother_;
 
  // Utilities
  std::shared_ptr<nav2_costmap_2d::CostmapSubscriber> costmap_sub_;
  std::shared_ptr<nav2_costmap_2d::FootprintSubscriber> footprint_sub_;
  std::shared_ptr<nav2_costmap_2d::CostmapTopicCollisionChecker> collision_checker_;
};
 
}  // namespace nav2_smoother
 
#endif  // NAV2_SMOOTHER__NAV2_SMOOTHER_HPP_