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/****************************************************************************
*
* Copyright (c) 2014 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file mission_block.cpp
*
* Helper class to use mission items
*
* @author Julian Oes <julian@oes.ch>
*/
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <float.h>
#include <systemlib/err.h>
#include <geo/geo.h>
#include <mavlink/mavlink_log.h>
#include <uORB/uORB.h>
#include "navigator.h"
#include "mission_block.h"
MissionBlock::MissionBlock(Navigator *navigator, const char *name) :
NavigatorMode(navigator, name),
_mission_item({0}),
_waypoint_position_reached(false),
_waypoint_yaw_reached(false),
_time_first_inside_orbit(0)
{
}
MissionBlock::~MissionBlock()
{
}
bool
MissionBlock::is_mission_item_reached()
{
if (_mission_item.nav_cmd == NAV_CMD_IDLE) {
return false;
}
if (_mission_item.nav_cmd == NAV_CMD_LAND) {
return _navigator->get_vstatus()->condition_landed;
}
/* TODO: count turns */
if ((/*_mission_item.nav_cmd == NAV_CMD_LOITER_TURN_COUNT ||*/
_mission_item.nav_cmd == NAV_CMD_LOITER_UNLIMITED)) {
return false;
}
hrt_abstime now = hrt_absolute_time();
if (!_waypoint_position_reached) {
float dist = -1.0f;
float dist_xy = -1.0f;
float dist_z = -1.0f;
float altitude_amsl = _mission_item.altitude_is_relative
? _mission_item.altitude + _navigator->get_home_position()->alt
: _mission_item.altitude;
dist = get_distance_to_point_global_wgs84(_mission_item.lat, _mission_item.lon, altitude_amsl,
_navigator->get_global_position()->lat,
_navigator->get_global_position()->lon,
_navigator->get_global_position()->alt,
&dist_xy, &dist_z);
if (_mission_item.nav_cmd == NAV_CMD_TAKEOFF && _navigator->get_vstatus()->is_rotary_wing) {
/* require only altitude for takeoff for multicopter */
if (_navigator->get_global_position()->alt >
altitude_amsl - _navigator->get_acceptance_radius()) {
_waypoint_position_reached = true;
}
} else if (_mission_item.nav_cmd == NAV_CMD_TAKEOFF) {
/* for takeoff mission items use the parameter for the takeoff acceptance radius */
if (dist >= 0.0f && dist <= _navigator->get_acceptance_radius()) {
_waypoint_position_reached = true;
}
} else if (!_navigator->get_vstatus()->is_rotary_wing &&
(_mission_item.nav_cmd == NAV_CMD_LOITER_UNLIMITED ||
_mission_item.nav_cmd == NAV_CMD_LOITER_TIME_LIMIT ||
_mission_item.nav_cmd == NAV_CMD_LOITER_TURN_COUNT)) {
/* Loiter mission item on a non rotary wing: the aircraft is going to circle the
* coordinates with a radius equal to the loiter_radius field. It is not flying
* through the waypoint center.
* Therefore the item is marked as reached once the system reaches the loiter
* radius (+ some margin). Time inside and turn count is handled elsewhere.
*/
if (dist >= 0.0f && dist <= _mission_item.loiter_radius * 1.2f) {
_waypoint_position_reached = true;
}
} else {
/* for normal mission items used their acceptance radius */
if (dist >= 0.0f && dist <= _mission_item.acceptance_radius) {
_waypoint_position_reached = true;
}
}
}
/* Check if the waypoint and the requested yaw setpoint. */
if (_waypoint_position_reached && !_waypoint_yaw_reached) {
/* TODO: removed takeoff, why? */
if (_navigator->get_vstatus()->is_rotary_wing && isfinite(_mission_item.yaw)) {
/* check yaw if defined only for rotary wing except takeoff */
float yaw_err = _wrap_pi(_mission_item.yaw - _navigator->get_global_position()->yaw);
if (fabsf(yaw_err) < 0.2f) { /* TODO: get rid of magic number */
_waypoint_yaw_reached = true;
}
} else {
_waypoint_yaw_reached = true;
}
}
/* Once the waypoint and yaw setpoint have been reached we can start the loiter time countdown */
if (_waypoint_position_reached && _waypoint_yaw_reached) {
if (_time_first_inside_orbit == 0) {
_time_first_inside_orbit = now;
// if (_mission_item.time_inside > 0.01f) {
// mavlink_log_critical(_mavlink_fd, "waypoint reached, wait for %.1fs",
// (double)_mission_item.time_inside);
// }
}
/* check if the MAV was long enough inside the waypoint orbit */
if (now - _time_first_inside_orbit >= (hrt_abstime)_mission_item.time_inside * 1e6f) {
return true;
}
}
return false;
}
void
MissionBlock::reset_mission_item_reached()
{
_waypoint_position_reached = false;
_waypoint_yaw_reached = false;
_time_first_inside_orbit = 0;
}
void
MissionBlock::mission_item_to_position_setpoint(const struct mission_item_s *item, struct position_setpoint_s *sp)
{
sp->valid = true;
sp->lat = item->lat;
sp->lon = item->lon;
sp->alt = item->altitude_is_relative ? item->altitude + _navigator->get_home_position()->alt : item->altitude;
sp->yaw = item->yaw;
sp->loiter_radius = item->loiter_radius;
sp->loiter_direction = item->loiter_direction;
sp->pitch_min = item->pitch_min;
switch (item->nav_cmd) {
case NAV_CMD_IDLE:
sp->type = position_setpoint_s::SETPOINT_TYPE_IDLE;
break;
case NAV_CMD_TAKEOFF:
sp->type = position_setpoint_s::SETPOINT_TYPE_TAKEOFF;
break;
case NAV_CMD_LAND:
sp->type = position_setpoint_s::SETPOINT_TYPE_LAND;
break;
case NAV_CMD_LOITER_TIME_LIMIT:
case NAV_CMD_LOITER_TURN_COUNT:
case NAV_CMD_LOITER_UNLIMITED:
sp->type = position_setpoint_s::SETPOINT_TYPE_LOITER;
break;
default:
sp->type = position_setpoint_s::SETPOINT_TYPE_POSITION;
break;
}
}
void
MissionBlock::set_previous_pos_setpoint()
{
struct position_setpoint_triplet_s *pos_sp_triplet = _navigator->get_position_setpoint_triplet();
if (pos_sp_triplet->current.valid) {
memcpy(&pos_sp_triplet->previous, &pos_sp_triplet->current, sizeof(struct position_setpoint_s));
}
}
void
MissionBlock::set_loiter_item(struct mission_item_s *item)
{
if (_navigator->get_vstatus()->condition_landed) {
/* landed, don't takeoff, but switch to IDLE mode */
item->nav_cmd = NAV_CMD_IDLE;
} else {
item->nav_cmd = NAV_CMD_LOITER_UNLIMITED;
struct position_setpoint_triplet_s *pos_sp_triplet = _navigator->get_position_setpoint_triplet();
if (_navigator->get_can_loiter_at_sp() && pos_sp_triplet->current.valid) {
/* use current position setpoint */
item->lat = pos_sp_triplet->current.lat;
item->lon = pos_sp_triplet->current.lon;
item->altitude = pos_sp_triplet->current.alt;
} else {
/* use current position */
item->lat = _navigator->get_global_position()->lat;
item->lon = _navigator->get_global_position()->lon;
item->altitude = _navigator->get_global_position()->alt;
}
item->altitude_is_relative = false;
item->yaw = NAN;
item->loiter_radius = _navigator->get_loiter_radius();
item->loiter_direction = 1;
item->acceptance_radius = _navigator->get_acceptance_radius();
item->time_inside = 0.0f;
item->pitch_min = 0.0f;
item->autocontinue = false;
item->origin = ORIGIN_ONBOARD;
}
}
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