mirror of https://github.com/ArduPilot/ardupilot
85 lines
4.6 KiB
C++
85 lines
4.6 KiB
C++
#pragma once
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#include <AP_Common/AP_Common.h>
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#include <AP_Common/Location.h>
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#include <AP_Math/AP_Math.h>
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#include <AP_HAL/AP_HAL.h>
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/*
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* BendyRuler avoidance algorithm for avoiding the polygon and circular fence and dynamic objects detected by the proximity sensor
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*/
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class AP_OABendyRuler {
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public:
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AP_OABendyRuler();
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/* Do not allow copies */
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AP_OABendyRuler(const AP_OABendyRuler &other) = delete;
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AP_OABendyRuler &operator=(const AP_OABendyRuler&) = delete;
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// send configuration info stored in front end parameters
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void set_config(float margin_max) { _margin_max = MAX(margin_max, 0.0f); }
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// run background task to find best path and update avoidance_results
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// returns true and populates origin_new and destination_new if OA is required. returns false if OA is not required
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bool update(const Location& current_loc, const Location& destination, const Vector2f &ground_speed_vec, Location &origin_new, Location &destination_new, bool proximity_only);
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enum class OABendyType {
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OA_BENDY_DISABLED = 0,
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OA_BENDY_HORIZONTAL = 1,
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OA_BENDY_VERTICAL = 2,
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};
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// return type of BendyRuler in use
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OABendyType get_type() const;
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// search for path in XY direction
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bool search_xy_path(const Location& current_loc, const Location& destination, float ground_course_deg, Location &destination_new, float lookahead_step_1_dist, float lookahead_step_2_dist, float bearing_to_dest, float distance_to_dest, bool proximity_only);
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// search for path in the Vertical directions
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bool search_vertical_path(const Location& current_loc, const Location& destination,Location &destination_new, const float &lookahead_step1_dist, const float &lookahead_step2_dist, const float &bearing_to_dest, const float &distance_to_dest, bool proximity_only);
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static const struct AP_Param::GroupInfo var_info[];
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private:
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// calculate minimum distance between a path and any obstacle
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float calc_avoidance_margin(const Location &start, const Location &end, bool proximity_only) const;
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// determine if BendyRuler should accept the new bearing or try and resist it. Returns true if bearing is not changed
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bool resist_bearing_change(const Location &destination, const Location ¤t_loc, bool active, float bearing_test, float lookahead_step1_dist, float margin, Location &prev_dest, float &prev_bearing, float &final_bearing, float &final_margin, bool proximity_only) const;
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// calculate minimum distance between a path and the circular fence (centered on home)
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// on success returns true and updates margin
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bool calc_margin_from_circular_fence(const Location &start, const Location &end, float &margin) const;
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// calculate minimum distance between a path and the altitude fence
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// on success returns true and updates margin
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bool calc_margin_from_alt_fence(const Location &start, const Location &end, float &margin) const;
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// calculate minimum distance between a path and all inclusion and exclusion polygons
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// on success returns true and updates margin
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bool calc_margin_from_inclusion_and_exclusion_polygons(const Location &start, const Location &end, float &margin) const;
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// calculate minimum distance between a path and all inclusion and exclusion circles
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// on success returns true and updates margin
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bool calc_margin_from_inclusion_and_exclusion_circles(const Location &start, const Location &end, float &margin) const;
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// calculate minimum distance between a path and proximity sensor obstacles
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// on success returns true and updates margin
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bool calc_margin_from_object_database(const Location &start, const Location &end, float &margin) const;
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// OA common parameters
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float _margin_max; // object avoidance will ignore objects more than this many meters from vehicle
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// BendyRuler parameters
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AP_Float _lookahead; // object avoidance will look this many meters ahead of vehicle
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AP_Float _bendy_ratio; // object avoidance will avoid major directional change if change in margin ratio is less than this param
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AP_Int16 _bendy_angle; // object avoidance will try avoding change in direction over this much angle
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AP_Int8 _bendy_type; // Type of BendyRuler to run
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// internal variables used by background thread
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float _current_lookahead; // distance (in meters) ahead of the vehicle we are looking for obstacles
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float _bearing_prev; // stored bearing in degrees
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Location _destination_prev; // previous destination, to check if there has been a change in destination
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};
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