#include <glib.h>
#include <time.h>
-#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
#include "coords.h"
#include "vikcoord.h"
#include "viktrack.h"
#include "globals.h"
+#include "dems.h"
VikTrack *vik_track_new()
{
- VikTrack *tr = g_malloc ( sizeof ( VikTrack ) );
- tr->trackpoints = NULL;
- tr->comment = NULL;
+ VikTrack *tr = g_malloc0 ( sizeof ( VikTrack ) );
tr->ref_count = 1;
return tr;
}
tr->ref_count++;
}
+void vik_track_set_property_dialog(VikTrack *tr, GtkWidget *dialog)
+{
+ /* Warning: does not check for existing dialog */
+ tr->property_dialog = dialog;
+}
+
+void vik_track_clear_property_dialog(VikTrack *tr)
+{
+ tr->property_dialog = NULL;
+}
+
void vik_track_free(VikTrack *tr)
{
if ( tr->ref_count-- > 1 )
g_free ( tr->comment );
g_list_foreach ( tr->trackpoints, (GFunc) g_free, NULL );
g_list_free( tr->trackpoints );
+ if (tr->property_dialog)
+ gtk_widget_destroy ( GTK_WIDGET(tr->property_dialog) );
g_free ( tr );
}
VikTrackpoint *vik_trackpoint_new()
{
- return g_malloc0(sizeof(VikTrackpoint));
+ VikTrackpoint *tp = g_malloc0(sizeof(VikTrackpoint));
+ tp->extended = FALSE;
+ tp->speed = NAN;
+ tp->course = NAN;
+ return tp;
}
void vik_trackpoint_free(VikTrackpoint *tp)
GList *iter = tr->trackpoints;
+ if (!iter || !iter->next) /* zero- or 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 );
total_length = vik_track_get_length_including_gaps ( tr );
chunk_length = total_length / num_chunks;
+ /* Zero chunk_length (eg, track of 2 tp with the same loc) will cause crash */
+ if (chunk_length <= 0)
+ return NULL;
+
current_dist = 0.0;
current_area_under_curve = 0;
current_chunk = 0;
dist_along_seg = chunk_length - current_dist;
if ( ignore_it || !iter->next ) {
pts[current_chunk] = current_area_under_curve / current_dist;
+ if (!iter->next) {
+ int i;
+ for (i = current_chunk + 1; i < num_chunks; i++)
+ pts[i] = pts[current_chunk];
+ break;
+ }
}
else {
current_area_under_curve += dist_along_seg * (altitude1 + (altitude2 - altitude1)*dist_along_seg/current_seg_length);
{
gdouble diff;
*up = *down = 0;
- if ( tr->trackpoints )
+ if ( tr->trackpoints && VIK_TRACKPOINT(tr->trackpoints->data)->altitude != VIK_DEFAULT_ALTITUDE )
{
GList *iter = tr->trackpoints->next;
while (iter)
*down -= diff;
iter = iter->next;
}
- }
+ } else
+ *up = *down = VIK_DEFAULT_ALTITUDE;
}
+
+/* by Alex Foobarian */
gdouble *vik_track_make_speed_map ( const VikTrack *tr, guint16 num_chunks )
{
- gdouble *pts;
- gdouble duration, chunk_dur, t;
+ gdouble *v, *s, *t;
+ gdouble duration, chunk_dur;
time_t t1, t2;
- int i;
-
- GList *iter = tr->trackpoints;
+ int i, pt_count, numpts, index;
+ GList *iter;
if ( ! tr->trackpoints )
return NULL;
return NULL;
if (duration < 0) {
- fprintf(stderr, "negative duration: unsorted trackpoint timestamps?\n");
+ g_warning("negative duration: unsorted trackpoint timestamps?");
return NULL;
}
-
- pts = g_malloc ( sizeof(gdouble) * num_chunks );
+ pt_count = vik_track_get_tp_count(tr);
+ v = g_malloc ( sizeof(gdouble) * num_chunks );
chunk_dur = duration / num_chunks;
- t = t1;
- for (i = 0; i < num_chunks; i++, t+=chunk_dur) {
- while (iter && VIK_TRACKPOINT(iter->data)->timestamp <= t) {
- iter = iter->next;
- }
- pts[i] = vik_coord_diff ( &(VIK_TRACKPOINT(iter->prev->data)->coord),
- &(VIK_TRACKPOINT(iter->data)->coord) ) /
- (gdouble)(VIK_TRACKPOINT(iter->data)->timestamp - VIK_TRACKPOINT(iter->prev->data)->timestamp);
+
+ s = g_malloc(sizeof(double) * pt_count);
+ t = g_malloc(sizeof(double) * pt_count);
+
+ iter = tr->trackpoints->next;
+ numpts = 0;
+ s[0] = 0;
+ t[0] = VIK_TRACKPOINT(iter->prev->data)->timestamp;
+ numpts++;
+ while (iter) {
+ s[numpts] = s[numpts-1] + vik_coord_diff ( &(VIK_TRACKPOINT(iter->prev->data)->coord), &(VIK_TRACKPOINT(iter->data)->coord) );
+ t[numpts] = VIK_TRACKPOINT(iter->data)->timestamp;
+ numpts++;
+ iter = iter->next;
}
- return pts;
+ /* In the following computation, we iterate through periods of time of duration chunk_dur.
+ * The first period begins at the beginning of the track. The last period ends at the end of the track.
+ */
+ index = 0; /* index of the current trackpoint. */
+ for (i = 0; i < num_chunks; i++) {
+ /* we are now covering the interval from t[0] + i*chunk_dur to t[0] + (i+1)*chunk_dur.
+ * find the first trackpoint outside the current interval, averaging the speeds between intermediate trackpoints.
+ */
+ if (t[0] + i*chunk_dur >= t[index]) {
+ gdouble acc_t = 0, acc_s = 0;
+ numpts = 0;
+ while (t[0] + i*chunk_dur >= t[index]) {
+ acc_s += (s[index+1]-s[index]);
+ acc_t += (t[index+1]-t[index]);
+ index++;
+ numpts++;
+ }
+ v[i] = acc_s/acc_t;
+ }
+ else if (i) {
+ v[i] = v[i-1];
+ }
+ else {
+ v[i] = 0;
+ }
+ }
+ g_free(s);
+ g_free(t);
+ return v;
}
-VikCoord *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist )
+/* by Alex Foobarian */
+VikTrackpoint *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist, gdouble *meters_from_start )
{
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;
+ gdouble last_dist = 0.0;
while (iter)
{
current_inc = vik_coord_diff ( &(VIK_TRACKPOINT(iter->data)->coord),
&(VIK_TRACKPOINT(iter->prev->data)->coord) );
+ last_dist = current_dist;
current_dist += current_inc;
if ( current_dist >= dist )
break;
+ last_iter = iter;
iter = iter->next;
}
+ if (!iter) { /* passing the end the track */
+ if (last_iter) {
+ if (meters_from_start)
+ *meters_from_start = last_dist;
+ return(VIK_TRACKPOINT(last_iter->data));
+ }
+ else
+ return 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) )
+ if ( iter->prev && abs(current_dist-current_inc-dist) < abs(current_dist-dist) ) {
+ if (meters_from_start)
+ *meters_from_start = last_dist;
iter = iter->prev;
+ }
+ else
+ if (meters_from_start)
+ *meters_from_start = current_dist;
+
+ return VIK_TRACKPOINT(iter->data);
+
+ }
+ return NULL;
+}
+VikTrackpoint *vik_track_get_closest_tp_by_percentage_time ( VikTrack *tr, gdouble reltime, time_t *seconds_from_start )
+{
+ time_t t_pos, t_start, t_end, t_total;
+ t_start = VIK_TRACKPOINT(tr->trackpoints->data)->timestamp;
+ t_end = VIK_TRACKPOINT(g_list_last(tr->trackpoints)->data)->timestamp;
+ t_total = t_end - t_start;
+ t_pos = t_start + t_total * reltime;
- rv = g_malloc(sizeof(VikCoord));
- *rv = VIK_TRACKPOINT(iter->data)->coord;
+ if ( !tr->trackpoints )
+ return NULL;
- return rv;
+ GList *iter = tr->trackpoints;
+ while (iter) {
+ if (VIK_TRACKPOINT(iter->data)->timestamp == t_pos)
+ break;
+ if (VIK_TRACKPOINT(iter->data)->timestamp > t_pos) {
+ if (iter->prev == NULL) /* first trackpoint */
+ break;
+ time_t t_before = t_pos - VIK_TRACKPOINT(iter->prev)->timestamp;
+ time_t t_after = VIK_TRACKPOINT(iter->data)->timestamp - t_pos;
+ if (t_before <= t_after)
+ iter = iter->prev;
+ break;
+ }
+ else if ((iter->next == NULL) && (t_pos < (VIK_TRACKPOINT(iter->data)->timestamp + 3))) /* last trackpoint: accommodate for round-off */
+ break;
+ iter = iter->next;
}
- return NULL;
+
+ if (!iter)
+ return NULL;
+ if (seconds_from_start)
+ *seconds_from_start = VIK_TRACKPOINT(iter->data)->timestamp - VIK_TRACKPOINT(tr->trackpoints->data)->timestamp;
+ return VIK_TRACKPOINT(iter->data);
}
+
+gboolean vik_track_get_minmax_alt ( const VikTrack *tr, gdouble *min_alt, gdouble *max_alt )
+{
+ *min_alt = 25000;
+ *max_alt = -5000;
+ if ( tr && tr->trackpoints && tr->trackpoints->data && (VIK_TRACKPOINT(tr->trackpoints->data)->altitude != VIK_DEFAULT_ALTITUDE) ) {
+ GList *iter = tr->trackpoints->next;
+ gdouble tmp_alt;
+ while (iter)
+ {
+ tmp_alt = VIK_TRACKPOINT(iter->data)->altitude;
+ if ( tmp_alt > *max_alt )
+ *max_alt = tmp_alt;
+ if ( tmp_alt < *min_alt )
+ *min_alt = tmp_alt;
+ iter = iter->next;
+ }
+ return TRUE;
+ }
+ return FALSE;
+}
+
+void vik_track_marshall ( VikTrack *tr, guint8 **data, guint *datalen)
+{
+ GList *tps;
+ GByteArray *b = g_byte_array_new();
+ guint len;
+ guint intp, ntp;
+
+ g_byte_array_append(b, (guint8 *)tr, sizeof(*tr));
+
+ /* we'll fill out number of trackpoints later */
+ intp = b->len;
+ g_byte_array_append(b, (guint8 *)&len, sizeof(len));
+
+ tps = tr->trackpoints;
+ ntp = 0;
+ while (tps) {
+ g_byte_array_append(b, (guint8 *)tps->data, sizeof(VikTrackpoint));
+ tps = tps->next;
+ ntp++;
+ }
+ *(guint *)(b->data + intp) = ntp;
+
+ len = (tr->comment) ? strlen(tr->comment)+1 : 0;
+ g_byte_array_append(b, (guint8 *)&len, sizeof(len));
+ if (tr->comment) g_byte_array_append(b, (guint8 *)tr->comment, len);
+
+ *data = b->data;
+ *datalen = b->len;
+ g_byte_array_free(b, FALSE);
+}
+
+VikTrack *vik_track_unmarshall (guint8 *data, guint datalen)
+{
+ guint len;
+ VikTrack *new_tr = vik_track_new();
+ VikTrackpoint *new_tp;
+ guint ntp;
+ gint i;
+
+ /* only the visibility is needed */
+ new_tr->visible = ((VikTrack *)data)->visible;
+ data += sizeof(*new_tr);
+
+ ntp = *(guint *)data;
+ data += sizeof(ntp);
+
+ for (i=0; i<ntp; i++) {
+ new_tp = vik_trackpoint_new();
+ memcpy(new_tp, data, sizeof(*new_tp));
+ data += sizeof(*new_tp);
+ new_tr->trackpoints = g_list_append(new_tr->trackpoints, new_tp);
+ }
+
+ len = *(guint *)data;
+ data += sizeof(len);
+ if (len) {
+ new_tr->comment = g_strdup((gchar *)data);
+ }
+ 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), VIK_DEM_INTERPOL_BEST );
+ 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;
+}
+
+/* starting at the end, looks backwards for the last "double point", a duplicate trackpoint.
+ * this is indicative of magic scissors continued use. If there is no double point,
+ * deletes all the trackpoints. Returns the new end of the track (or the start if
+ * there are no double points
+ */
+VikCoord *vik_track_cut_back_to_double_point ( VikTrack *tr )
+{
+ GList *iter = tr->trackpoints;
+ VikCoord *rv;
+
+ if ( !iter )
+ return NULL;
+ while ( iter->next )
+ iter = iter->next;
+
+
+ while ( iter->prev ) {
+ if ( vik_coord_equals((VikCoord *)iter->data, (VikCoord *)iter->prev->data) ) {
+ GList *prev = iter->prev;
+
+ rv = g_malloc(sizeof(VikCoord));
+ *rv = *((VikCoord *) iter->data);
+
+ /* truncate trackpoint list */
+ iter->prev = NULL; /* pretend it's the end */
+ g_list_foreach ( iter, (GFunc) g_free, NULL );
+ g_list_free( iter );
+
+ prev->next = NULL;
+
+ return rv;
+ }
+ iter = iter->prev;
+ }
+
+ /* no double point found! */
+ rv = g_malloc(sizeof(VikCoord));
+ *rv = *((VikCoord *) tr->trackpoints->data);
+ g_list_foreach ( tr->trackpoints, (GFunc) g_free, NULL );
+ g_list_free( tr->trackpoints );
+ tr->trackpoints = NULL;
+ return rv;
+}
+
projects / andy / viking.git / blobdiff