#include "vikcoord.h"
#include "viktrack.h"
#include "globals.h"
+#include "dems.h"
VikTrack *vik_track_new()
{
GList *iter = tr->trackpoints;
+ if (!iter->next) /* one-point track */
+ return NULL;
+
{ /* test if there's anything worth calculating */
gboolean okay = FALSE;
while ( iter )
return NULL;
}
-
+ iter = tr->trackpoints;
g_assert ( num_chunks < 16000 );
g_assert ( num_chunks < 16000 );
+#ifdef XXXXXXXXXXXXXXXXXX
+ iter = tr->trackpoints;
+ while (iter) {
+
+ }
+#endif /*XXXXXXXXXXXXXXXXXX*/
+
t1 = VIK_TRACKPOINT(tr->trackpoints->data)->timestamp;
t2 = VIK_TRACKPOINT(g_list_last(tr->trackpoints)->data)->timestamp;
duration = t2 - t1;
return NULL;
if (duration < 0) {
- fprintf(stderr, "negative duration: unsorted trackpoint timestamps?\n");
+ g_warning("negative duration: unsorted trackpoint timestamps?\n");
return NULL;
}
pt_count = vik_track_get_tp_count(tr);
compute_spline(numpts, t, s, p);
- /*
- printf("Got spline\n");
- for (i=0; i<numpts-1; i++) {
- printf("a = %15f b = %15f c = %15f d = %15f\n", p[i].a, p[i].b, p[i].c, p[i].d);
- }
- */
-
/* the spline gives us distances at chunk_dur intervals. from these,
* we obtain average speed in each interval.
*/
}
/* by Alex Foobarian */
-VikCoord *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist )
+VikTrackpoint *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist )
{
gdouble dist = vik_track_get_length_including_gaps(tr) * reldist;
gdouble current_dist = 0.0;
gdouble current_inc = 0.0;
- VikCoord *rv;
if ( tr->trackpoints )
{
GList *iter = tr->trackpoints->next;
+ GList *last_iter = NULL;
while (iter)
{
current_inc = vik_coord_diff ( &(VIK_TRACKPOINT(iter->data)->coord),
current_dist += current_inc;
if ( current_dist >= dist )
break;
+ last_iter = iter;
iter = iter->next;
}
+ if (!iter) /* passing the end the track */
+ return (last_iter ? last_iter->data : NULL);
/* we've gone past the dist already, was prev trackpoint closer? */
/* should do a vik_coord_average_weighted() thingy. */
if ( iter->prev && abs(current_dist-current_inc-dist) < abs(current_dist-dist) )
iter = iter->prev;
-
-
- rv = g_malloc(sizeof(VikCoord));
- *rv = VIK_TRACKPOINT(iter->data)->coord;
-
- return rv;
+ return VIK_TRACKPOINT(iter->data);
}
return NULL;
return new_tr;
}
+void vik_track_apply_dem_data ( VikTrack *tr )
+{
+ GList *tp_iter;
+ gint16 elev;
+ tp_iter = tr->trackpoints;
+ while ( tp_iter ) {
+ /* TODO: of the 4 possible choices we have for choosing an elevation
+ * (trackpoint in between samples), choose the one with the least elevation change
+ * as the last */
+ elev = a_dems_get_elev_by_coord ( &(VIK_TRACKPOINT(tp_iter->data)->coord) );
+ if ( elev != VIK_DEM_INVALID_ELEVATION )
+ VIK_TRACKPOINT(tp_iter->data)->altitude = elev;
+ tp_iter = tp_iter->next;
+ }
+}
+
+/* appends t2 to t1, leaving t2 with no trackpoints */
+void vik_track_steal_and_append_trackpoints ( VikTrack *t1, VikTrack *t2 )
+{
+ if ( t1->trackpoints ) {
+ GList *tpiter = t1->trackpoints;
+ while ( tpiter->next )
+ tpiter = tpiter->next;
+ tpiter->next = t2->trackpoints;
+ t2->trackpoints->prev = tpiter;
+ } else
+ t1->trackpoints = t2->trackpoints;
+ t2->trackpoints = NULL;
+}