TWaypoint.h

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/* +---------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)               |
   |                          http://www.mrpt.org/                             |
   |                                                                           |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file        |
   | See: http://www.mrpt.org/Authors - All rights reserved.                   |
   | Released under BSD License. See details in http://www.mrpt.org/License    |
   +---------------------------------------------------------------------------+ */
#pragma once

#include <mrpt/math/lightweight_geom_data.h>
#include <mrpt/utils/CConfigFileBase.h>
#include <mrpt/system/datetime.h>
#include <mrpt/opengl/opengl_frwds.h>
#include <mrpt/utils/TColor.h>
#include <vector>
#include <string>

#include <mrpt/nav/link_pragmas.h>

namespace mrpt
{
  namespace nav
  {
        /** A single waypoint within TWaypointSequence. \ingroup nav_reactive */
        struct NAV_IMPEXP TWaypoint
        {
                /** [Must be set by the user] Coordinates of desired target location (world/global coordinates).
                  * \sa target_heading */
                mrpt::math::TPoint2D  target;
                /** [Default=any heading] Optionally, set to the desired orientation [radians]
                  * of the robot at this waypoint. Some navigator implementations may ignore
                  * this preferred heading anyway, read the docs of each implementation to find it out. */
                double  target_heading;

                std::string target_frame_id; //!< (Default="map") Frame ID in which target is given. Optional, use only for submapping applications.

                double  allowed_distance; //!< [Must be set by the user] How close should the robot get to this waypoint for it to be considered reached.

                /** (Default=1.0) Desired robot speed at the target, as a ratio of the full robot speed.
                  * That is: speed_ratio=1 means that the user wants the robot to navigate to the target
                  * and smoothly continue to the next one when reached. speed_ratio=0 on the other hand means
                  * that the robot should approach this waypoint slowing down and end up totally stopped.
                  */
                double  speed_ratio;

                /** [Default=true] Whether it is allowed to the navigator to proceed to a more advanced waypoint
                  * in the sequence if it determines that it is easier to skip this one (e.g. it seems blocked by dynamic obstacles).
                  * This value is ignored for the last waypoint in a sequence, since it is always considered to be the
                  * ultimate goal and hence not subject to be skipped.
                  */
                bool    allow_skip;

                bool isValid() const; //!< Check whether all the minimum mandatory fields have been filled by the user.
                TWaypoint(); //!< Ctor with default values
                TWaypoint(double target_x, double target_y, double allowed_distance, bool allow_skip = true, double target_heading_ = INVALID_NUM, double  speed_ratio_ = 1.0);
                std::string getAsText() const; //!< get in human-readable format

                static const double INVALID_NUM; //!< The default value of fields (used to detect non-set values)
        };

        /** used in getAsOpenglVisualization() */
        struct NAV_IMPEXP TWaypointsRenderingParams
        {
                TWaypointsRenderingParams();

                double outter_radius, inner_radius;
                double outter_radius_non_skippable, inner_radius_non_skippable;
                double outter_radius_reached, inner_radius_reached;
                double heading_arrow_len;
                mrpt::utils::TColor  color_regular, color_current_goal, color_reached;
                bool show_labels;
        };

        /** The struct for requesting navigation requests for a sequence of waypoints.
         * Used in CWaypointsNavigator::navigateWaypoints().
         * Users can directly fill in the list of waypoints manipulating the public field `waypoints`.
         *  \ingroup nav_reactive */
        struct NAV_IMPEXP TWaypointSequence
        {
                std::vector<TWaypoint> waypoints;

                void clear() { waypoints.clear(); }

                TWaypointSequence(); //!< Ctor with default values
                std::string getAsText() const; //!< Gets navigation params as a human-readable format
                /** Renders the sequence of waypoints (previous contents of `obj` are cleared) */
                void getAsOpenglVisualization(mrpt::opengl::CSetOfObjects &obj, const mrpt::nav::TWaypointsRenderingParams &params = mrpt::nav::TWaypointsRenderingParams()) const;
                /** Saves waypoints to a config file section */
                void save(mrpt::utils::CConfigFileBase &c,const std::string &s) const;
                /** Loads waypoints to a config file section */
                void load(const mrpt::utils::CConfigFileBase &c,const std::string &s);
        };

        /** A waypoint with an execution status. \ingroup nav_reactive */
        struct NAV_IMPEXP TWaypointStatus : public TWaypoint
        {
                bool reached; //!< Whether this waypoint has been reached already (to within the allowed distance as per user specifications) or skipped.
                bool skipped; //!< If `reached==true` this boolean tells whether the waypoint was physically reached (false) or marked as reached because it was skipped (true).
                mrpt::system::TTimeStamp  timestamp_reach; //!< Timestamp of when this waypoint was reached. (Default=INVALID_TIMESTAMP means not reached so far)
                int counter_seen_reachable; //!< (Initialized to 0 automatically) How many times this waypoint has been seen as "reachable" before it being the current active waypoint.


                TWaypointStatus();
                TWaypointStatus & operator =(const TWaypoint &wp);
                std::string getAsText() const; //!< Gets navigation params as a human-readable format
        };

        /** The struct for querying the status of waypoints navigation. Used in CWaypointsNavigator::getWaypointNavStatus().
         *  \ingroup nav_reactive */
        struct NAV_IMPEXP TWaypointStatusSequence
        {
                std::vector<TWaypointStatus> waypoints; //!< Waypoints parameters and status (reached, skipped, etc.)
                mrpt::system::TTimeStamp     timestamp_nav_started; //!< Timestamp of user navigation command.
                bool final_goal_reached; //!< Whether the final waypoint has been reached successfuly.
                /** Index in `waypoints` of the waypoint the navigator is currently trying to reach.
                  * This will point to the last waypoint after navigation ends successfully.
                  * Its value is `-1` if navigation has not started yet */
                int  waypoint_index_current_goal;

                mrpt::math::TPose2D  last_robot_pose; //!< Robot pose at last time step (has INVALID_NUM fields upon initialization)

                TWaypointStatusSequence(); //!< Ctor with default values
                std::string getAsText() const; //!< Gets navigation params as a human-readable format

                /** Renders the sequence of waypoints (previous contents of `obj` are cleared) */
                void getAsOpenglVisualization(mrpt::opengl::CSetOfObjects &obj, const mrpt::nav::TWaypointsRenderingParams &params = mrpt::nav::TWaypointsRenderingParams()) const;
        };

  }
}