simple_goal_checker.cpp

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#include <memory>
#include <string>
#include <limits>
#include <vector>
#include "nav2_controller/plugins/simple_goal_checker.hpp"
#include "pluginlib/class_list_macros.hpp"
#include "angles/angles.h"
#include "nav2_ros_common/node_utils.hpp"
#include "nav2_util/geometry_utils.hpp"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#include "tf2/utils.hpp"
#pragma GCC diagnostic pop
 
using rcl_interfaces::msg::ParameterType;
using std::placeholders::_1;
 
namespace nav2_controller
{
 
SimpleGoalChecker::SimpleGoalChecker()
: xy_goal_tolerance_(0.25),
  yaw_goal_tolerance_(0.25),
  stateful_(true),
  check_xy_(true),
  xy_goal_tolerance_sq_(0.0625)
{
}
 
void SimpleGoalChecker::initialize(
  const nav2::LifecycleNode::WeakPtr & parent,
  const std::string & plugin_name,
  const std::shared_ptr<nav2_costmap_2d::Costmap2DROS>/*costmap_ros*/)
{
  plugin_name_ = plugin_name;
  auto node = parent.lock();
 
  xy_goal_tolerance_ = node->declare_or_get_parameter(plugin_name + ".xy_goal_tolerance", 0.25);
  yaw_goal_tolerance_ = node->declare_or_get_parameter(plugin_name + ".yaw_goal_tolerance", 0.25);
  stateful_ = node->declare_or_get_parameter(plugin_name + ".stateful", true);
 
  xy_goal_tolerance_sq_ = xy_goal_tolerance_ * xy_goal_tolerance_;
 
  // Add callback for dynamic parameters
  dyn_params_handler_ = node->add_on_set_parameters_callback(
    std::bind(&SimpleGoalChecker::dynamicParametersCallback, this, _1));
}
 
void SimpleGoalChecker::reset()
{
  check_xy_ = true;
}
 
bool SimpleGoalChecker::isGoalReached(
  const geometry_msgs::msg::Pose & query_pose, const geometry_msgs::msg::Pose & goal_pose,
  const geometry_msgs::msg::Twist &)
{
  if (check_xy_) {
    double dx = query_pose.position.x - goal_pose.position.x,
      dy = query_pose.position.y - goal_pose.position.y;
    if (dx * dx + dy * dy > xy_goal_tolerance_sq_) {
      return false;
    }
    // We are within the window
    // If we are stateful, change the state.
    if (stateful_) {
      check_xy_ = false;
    }
  }
  double dyaw = angles::shortest_angular_distance(
    tf2::getYaw(query_pose.orientation),
    tf2::getYaw(goal_pose.orientation));
  return fabs(dyaw) <= yaw_goal_tolerance_;
}
 
bool SimpleGoalChecker::getTolerances(
  geometry_msgs::msg::Pose & pose_tolerance,
  geometry_msgs::msg::Twist & vel_tolerance)
{
  double invalid_field = std::numeric_limits<double>::lowest();
 
  pose_tolerance.position.x = xy_goal_tolerance_;
  pose_tolerance.position.y = xy_goal_tolerance_;
  pose_tolerance.position.z = invalid_field;
  pose_tolerance.orientation =
    nav2_util::geometry_utils::orientationAroundZAxis(yaw_goal_tolerance_);
 
  vel_tolerance.linear.x = invalid_field;
  vel_tolerance.linear.y = invalid_field;
  vel_tolerance.linear.z = invalid_field;
 
  vel_tolerance.angular.x = invalid_field;
  vel_tolerance.angular.y = invalid_field;
  vel_tolerance.angular.z = invalid_field;
 
  return true;
}
 
rcl_interfaces::msg::SetParametersResult
SimpleGoalChecker::dynamicParametersCallback(std::vector<rclcpp::Parameter> parameters)
{
  rcl_interfaces::msg::SetParametersResult result;
  for (auto & parameter : parameters) {
    const auto & param_type = parameter.get_type();
    const auto & param_name = parameter.get_name();
    if (param_name.find(plugin_name_ + ".") != 0) {
      continue;
    }
    if (param_type == ParameterType::PARAMETER_DOUBLE) {
      if (param_name == plugin_name_ + ".xy_goal_tolerance") {
        xy_goal_tolerance_ = parameter.as_double();
        xy_goal_tolerance_sq_ = xy_goal_tolerance_ * xy_goal_tolerance_;
      } else if (param_name == plugin_name_ + ".yaw_goal_tolerance") {
        yaw_goal_tolerance_ = parameter.as_double();
      }
    } else if (param_type == ParameterType::PARAMETER_BOOL) {
      if (param_name == plugin_name_ + ".stateful") {
        stateful_ = parameter.as_bool();
      }
    }
  }
  result.successful = true;
  return result;
}
 
}  // namespace nav2_controller
 
PLUGINLIB_EXPORT_CLASS(nav2_controller::SimpleGoalChecker, nav2_core::GoalChecker)