truncate_path_action.hpp

// Copyright (c) 2018 Intel Corporation
// Copyright (c) 2020 Francisco Martin Rico
//
// 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_BEHAVIOR_TREE__PLUGINS__ACTION__TRUNCATE_PATH_ACTION_HPP_
#define NAV2_BEHAVIOR_TREE__PLUGINS__ACTION__TRUNCATE_PATH_ACTION_HPP_
 
#include <memory>
#include <string>
 
#include "nav_msgs/msg/path.hpp"
 
#include "behaviortree_cpp/action_node.h"
#include "behaviortree_cpp/json_export.h"
#include "nav2_behavior_tree/json_utils.hpp"
 
namespace nav2_behavior_tree
{
 
class TruncatePath : public BT::ActionNodeBase
{
public:
  TruncatePath(
    const std::string & xml_tag_name,
    const BT::NodeConfiguration & conf);
 
  static BT::PortsList providedPorts()
  {
    // Register JSON definitions for the types used in the ports
    BT::RegisterJsonDefinition<nav_msgs::msg::Path>();
 
    return {
      BT::InputPort<nav_msgs::msg::Path>("input_path", "Original Path"),
      BT::OutputPort<nav_msgs::msg::Path>("output_path", "Path truncated to a certain distance"),
      BT::InputPort<double>("distance", 1.0, "distance"),
    };
  }
 
private:
  void halt() override {}
 
  BT::NodeStatus tick() override;
 
  double distance_;
};
 
}  // namespace nav2_behavior_tree
 
#endif  // NAV2_BEHAVIOR_TREE__PLUGINS__ACTION__TRUNCATE_PATH_ACTION_HPP_