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/*
Distance Between Points Filter(s)
Copyright (C) 2002 Robert Lipe, robertlipe+source@gpsbabel.org
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <cmath> // for fabs
#include <cstdlib> // for strtod
#include <QtCore/QList> // for QList
#include <QtCore/QtGlobal> // for qAsConst, QAddConst<>::Type
#include "defs.h"
#include "grtcirc.h" // for RAD, gcdist, radtometers
#include "position.h"
#if FILTERS_ENABLED
double PositionFilter::gc_distance(double lat1, double lon1, double lat2, double lon2)
{
return radtometers(gcdist(
RAD(lat1),
RAD(lon1),
RAD(lat2),
RAD(lon2)
));
}
/* tear through a waypoint queue, processing points by distance */
void PositionFilter::position_runqueue(WaypointList* waypt_list, int qtype)
{
QList<WptRecord> qlist;
for (const auto waypointp : qAsConst(*waypt_list)) {
qlist.append(WptRecord(waypointp));
}
int nelems = qlist.size();
for (int i = 0 ; i < nelems ; ++i) {
bool something_deleted = false;
if (!qlist.at(i).deleted) {
for (int j = i + 1 ; j < nelems ; ++j) {
if (!qlist.at(j).deleted) {
double dist = gc_distance(qlist.at(j).wpt->latitude,
qlist.at(j).wpt->longitude,
qlist.at(i).wpt->latitude,
qlist.at(i).wpt->longitude);
if (dist <= pos_dist) {
if (check_time) {
double diff_time = fabs(waypt_time(qlist.at(i).wpt) - waypt_time(qlist.at(j).wpt));
if (diff_time >= max_diff_time) {
continue;
}
}
qlist[j].deleted = true;
switch (qtype) {
case wptdata:
waypt_del(qlist.at(j).wpt);
delete qlist.at(j).wpt;
break;
case trkdata:
track_del_wpt(cur_rte, qlist.at(j).wpt);
delete qlist.at(j).wpt;
break;
case rtedata:
route_del_wpt(cur_rte, qlist.at(j).wpt);
delete qlist.at(j).wpt;
break;
default:
break;
}
something_deleted = true;
} else {
// Unlike waypoints, routes and tracks are ordered paths.
// Don't eliminate points from the return path when the
// route or track loops back on itself.
if ((qtype == trkdata) || (qtype == rtedata)) {
break;
}
}
}
}
if (something_deleted && (purge_duplicates != nullptr)) {
switch (qtype) {
case wptdata:
waypt_del(qlist.at(i).wpt);
delete qlist.at(i).wpt;
break;
case trkdata:
track_del_wpt(cur_rte, qlist.at(i).wpt);
delete qlist.at(i).wpt;
break;
case rtedata:
route_del_wpt(cur_rte, qlist.at(i).wpt);
delete qlist.at(i).wpt;
break;
default:
break;
}
}
}
}
}
void PositionFilter::position_process_any_route(const route_head* rh, int type)
{
if (rh->rte_waypt_ct != 0) {
cur_rte = const_cast<route_head*>(rh);
position_runqueue(&cur_rte->waypoint_list, type);
cur_rte = nullptr;
}
}
void PositionFilter::position_process_rte(const route_head* rh)
{
position_process_any_route(rh, rtedata);
}
void PositionFilter::position_process_trk(const route_head* rh)
{
position_process_any_route(rh, trkdata);
}
void PositionFilter::process()
{
RteHdFunctor<PositionFilter> position_process_rte_f(this, &PositionFilter::position_process_rte);
RteHdFunctor<PositionFilter> position_process_trk_f(this, &PositionFilter::position_process_trk);
if (waypt_count() != 0) {
position_runqueue(global_waypoint_list, wptdata);
}
route_disp_all(position_process_rte_f, nullptr, nullptr);
track_disp_all(position_process_trk_f, nullptr, nullptr);
}
void PositionFilter::init()
{
char* fm;
pos_dist = 0.0;
max_diff_time = 0.0;
check_time = false;
if (distopt != nullptr) {
pos_dist = strtod(distopt, &fm);
if (!((*fm == 'm') || (*fm == 'M'))) {
/* distance is feet */
pos_dist = FEET_TO_METERS(pos_dist);
}
}
if (timeopt != nullptr) {
check_time = true;
max_diff_time = strtod(timeopt, &fm);
}
}
#endif // FILTERS_ENABLED
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