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/*
Add route points before and after a bend.
Copyright (C) 2011 Fernando Arbeiza, fernando.arbeiza@gmail.com
Copyright (C) 2011 Robert Lipe, robertlipe@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., 59 Temple Place - Suite 330, Boston, MA 02111 USA
*/
#include "defs.h"
#include "filterdefs.h"
#include "grtcirc.h"
#include <ctype.h>
#define MYNAME "bend"
#if FILTERS_ENABLED
static char* distopt = NULL;
static char* minangleopt = NULL;
static double maxDist;
static double minAngle;
static queue* routes_orig = NULL;
static int routes_orig_num = 0;
static
arglist_t bend_args[] = {
{
"distance", &distopt, "Distance to the bend in meters where the new points will be added",
"25", ARGTYPE_FLOAT, ARG_NOMINMAX
},
{
"minangle", &minangleopt, "Minimum bend angle in degrees", "5",
ARGTYPE_FLOAT, ARG_NOMINMAX
},
ARG_TERMINATOR
};
static void
bend_init(const char* args)
{
maxDist = 0.0;
if (distopt) {
maxDist = strtod(distopt, NULL);
}
minAngle = 0.0;
if (minangleopt) {
minAngle = strtod(minangleopt, NULL);
}
route_backup(&routes_orig_num, &routes_orig);
route_flush_all_routes();
}
static waypoint*
create_wpt_dest(const waypoint* wpt_orig, double lat_orig,
double long_orig, double lat_orig_adj, double long_orig_adj)
{
double distance = gcdist(lat_orig, long_orig,
lat_orig_adj, long_orig_adj);
double frac;
double lat_dest;
double long_dest;
waypoint* wpt_dest = NULL;
distance = radtometers(distance);
if (distance <= maxDist) {
return NULL;
}
frac = maxDist / distance;
linepart(lat_orig, long_orig, lat_orig_adj, long_orig_adj, frac,
&lat_dest, &long_dest);
wpt_dest = waypt_dupe(wpt_orig);
wpt_dest->latitude = DEG(lat_dest);
wpt_dest->longitude = DEG(long_dest);
return wpt_dest;
}
static int
is_small_angle(double lat_orig, double long_orig, double lat_orig_prev,
double long_orig_prev, double lat_orig_next,
double long_orig_next)
{
double heading_prev = heading_true_degrees(lat_orig, long_orig,
lat_orig_prev, long_orig_prev);
double heading_next = heading_true_degrees(lat_orig, long_orig,
lat_orig_next, long_orig_next);
double heading_diff = heading_next - heading_prev;
return ((abs(heading_diff - 0.0) < minAngle)
|| (abs(heading_diff - 180.0) < minAngle)
|| (abs(heading_diff - 360.0) < minAngle));
}
static void
process_route(const route_head* route_orig, route_head* route_dest)
{
waypoint* wpt_orig_prev = NULL;
waypoint* wpt_orig = NULL;
queue* elem, *tmp;
QUEUE_FOR_EACH(&route_orig->waypoint_list, elem, tmp) {
waypoint* wpt_orig_next = (waypoint*)elem;
if (wpt_orig_prev == NULL) {
if (wpt_orig != NULL) {
waypoint* waypoint_dest = waypt_dupe(wpt_orig);
route_add_wpt(route_dest, waypoint_dest);
}
} else {
double lat_orig = RAD(wpt_orig->latitude);
double long_orig = RAD(wpt_orig->longitude);
double lat_orig_prev = RAD(wpt_orig_prev->latitude);
double long_orig_prev = RAD(wpt_orig_prev->longitude);
double lat_orig_next = RAD(wpt_orig_next->latitude);
double long_orig_next = RAD(wpt_orig_next->longitude);
waypoint* wpt_dest_next = NULL;
if (is_small_angle(lat_orig, long_orig, lat_orig_prev,
long_orig_prev, lat_orig_next, long_orig_next)) {
waypoint* waypoint_dest = waypt_dupe(wpt_orig);
route_add_wpt(route_dest, waypoint_dest);
} else {
waypoint* wpt_dest_prev = create_wpt_dest(wpt_orig,
lat_orig, long_orig, lat_orig_prev, long_orig_prev);
if (wpt_dest_prev != NULL) {
route_add_wpt(route_dest, wpt_dest_prev);
}
wpt_dest_next = create_wpt_dest(wpt_orig,
lat_orig, long_orig, lat_orig_next, long_orig_next);
if (wpt_dest_next != NULL) {
route_add_wpt(route_dest, wpt_dest_next);
wpt_orig = wpt_dest_next;
}
}
}
wpt_orig_prev = wpt_orig;
wpt_orig = wpt_orig_next;
}
if (wpt_orig != NULL) {
waypoint* waypoint_dest = waypt_dupe(wpt_orig);
route_add_wpt(route_dest, waypoint_dest);
}
}
static void
process_route_orig(const route_head* route_orig)
{
route_head* route_dest = route_head_alloc();
route_dest->rte_name = xstrdup(route_orig->rte_name);
route_dest->rte_desc = xstrdup(route_orig->rte_desc);
route_dest->fs = fs_chain_copy(route_orig->fs);
route_dest->rte_num = route_orig->rte_num;
route_add_head(route_dest);
process_route(route_orig, route_dest);
}
static void
bend_process(void)
{
queue* elem, *tmp;
QUEUE_FOR_EACH(routes_orig, elem, tmp) {
route_head* route_orig = (route_head*)elem;
process_route_orig(route_orig);
}
}
static void
bend_deinit(void)
{
route_flush(routes_orig);
xfree(routes_orig);
}
static void
bend_exit(void)
{
}
filter_vecs_t bend_vecs = {
bend_init,
bend_process,
bend_deinit,
bend_exit,
bend_args
};
#endif // FILTERS_ENABLED
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