#include "viktrack.h"
#include "globals.h"
#include "dems.h"
+#include "settings.h"
VikTrack *vik_track_new()
{
return tr;
}
+#define VIK_SETTINGS_TRACK_NAME_MODE "track_draw_name_mode"
+#define VIK_SETTINGS_TRACK_NUM_DIST_LABELS "track_number_dist_labels"
+
+/**
+ * vik_track_set_defaults:
+ *
+ * Set some default values for a track.
+ * ATM This uses the 'settings' method to get values,
+ * so there is no GUI way to control these yet...
+ */
+void vik_track_set_defaults(VikTrack *tr)
+{
+ gint tmp;
+ if ( a_settings_get_integer ( VIK_SETTINGS_TRACK_NAME_MODE, &tmp ) )
+ tr->draw_name_mode = tmp;
+
+ if ( a_settings_get_integer ( VIK_SETTINGS_TRACK_NUM_DIST_LABELS, &tmp ) )
+ tr->max_number_dist_labels = tmp;
+}
+
void vik_track_set_comment_no_copy(VikTrack *tr, gchar *comment)
{
if ( tr->comment )
GList *tp_iter = tr->trackpoints;
new_tr->visible = tr->visible;
new_tr->is_route = tr->is_route;
+ new_tr->draw_name_mode = tr->draw_name_mode;
+ new_tr->max_number_dist_labels = tr->max_number_dist_labels;
new_tr->has_color = tr->has_color;
new_tr->color = tr->color;
new_tr->bbox = tr->bbox;
track_recalculate_bounds_last_tp ( tr );
}
+/**
+ * vik_track_get_length_to_trackpoint:
+ *
+ */
+gdouble vik_track_get_length_to_trackpoint (const VikTrack *tr, const VikTrackpoint *tp)
+{
+ gdouble len = 0.0;
+ if ( tr->trackpoints )
+ {
+ GList *iter = tr->trackpoints->next;
+ while (iter)
+ {
+ VikTrackpoint *tp1 = VIK_TRACKPOINT(iter->data);
+ if ( ! tp1->newsegment )
+ len += vik_coord_diff ( &(tp1->coord),
+ &(VIK_TRACKPOINT(iter->prev->data)->coord) );
+
+ // Exit when we reach the desired point
+ if ( tp1 == tp )
+ break;
+
+ iter = iter->next;
+ }
+ }
+ return len;
+}
+
gdouble vik_track_get_length(const VikTrack *tr)
{
gdouble len = 0.0;
gulong vik_track_get_tp_count(const VikTrack *tr)
{
- gulong num = 0;
- GList *iter = tr->trackpoints;
- while ( iter )
- {
- num++;
- iter = iter->next;
- }
- return num;
+ return g_list_length(tr->trackpoints);
}
gulong vik_track_get_dup_point_count ( const VikTrack *tr )
return v;
}
+/**
+ * vik_track_get_tp_by_dist:
+ * @trk: The Track on which to find a Trackpoint
+ * @meters_from_start: The distance along a track that the trackpoint returned is near
+ * @get_next_point: Since there is a choice of trackpoints, this determines which one to return
+ * @tp_metres_from_start: For the returned Trackpoint, returns the distance along the track
+ *
+ * TODO: Consider changing the boolean get_next_point into an enum with these options PREVIOUS, NEXT, NEAREST
+ *
+ * Returns: The #VikTrackpoint fitting the criteria or NULL
+ */
+VikTrackpoint *vik_track_get_tp_by_dist ( VikTrack *trk, gdouble meters_from_start, gboolean get_next_point, gdouble *tp_metres_from_start )
+{
+ gdouble current_dist = 0.0;
+ gdouble current_inc = 0.0;
+ if ( tp_metres_from_start )
+ *tp_metres_from_start = 0.0;
+
+ if ( trk->trackpoints ) {
+ GList *iter = g_list_next ( g_list_first ( trk->trackpoints ) );
+ while (iter) {
+ current_inc = vik_coord_diff ( &(VIK_TRACKPOINT(iter->data)->coord),
+ &(VIK_TRACKPOINT(iter->prev->data)->coord) );
+ current_dist += current_inc;
+ if ( current_dist >= meters_from_start )
+ break;
+ iter = g_list_next ( iter );
+ }
+ // passed the end of the track
+ if ( !iter )
+ return NULL;
+
+ if ( tp_metres_from_start )
+ *tp_metres_from_start = current_dist;
+
+ // we've gone past the distance already, is the previous trackpoint wanted?
+ if ( !get_next_point ) {
+ if ( iter->prev ) {
+ if ( tp_metres_from_start )
+ *tp_metres_from_start = current_dist-current_inc;
+ return VIK_TRACKPOINT(iter->prev->data);
+ }
+ }
+ return VIK_TRACKPOINT(iter->data);
+ }
+
+ return NULL;
+}
+
/* by Alex Foobarian */
VikTrackpoint *vik_track_get_closest_tp_by_percentage_dist ( VikTrack *tr, gdouble reldist, gdouble *meters_from_start )
{
/* basic properties: */
new_tr->visible = ((VikTrack *)data)->visible;
new_tr->is_route = ((VikTrack *)data)->is_route;
+ new_tr->draw_name_mode = ((VikTrack *)data)->draw_name_mode;
+ new_tr->max_number_dist_labels = ((VikTrack *)data)->max_number_dist_labels;
new_tr->has_color = ((VikTrack *)data)->has_color;
new_tr->color = ((VikTrack *)data)->color;
new_tr->bbox = ((VikTrack *)data)->bbox;
tp_iter = tp_iter->next;
}
- g_debug ( g_strdup_printf("Bounds of track: '%s' is: %f,%f to: %f,%f", trk->name, topleft.lat, topleft.lon, bottomright.lat, bottomright.lon ) );
+ g_debug ( "Bounds of track: '%s' is: %f,%f to: %f,%f", trk->name, topleft.lat, topleft.lon, bottomright.lat, bottomright.lon );
trk->bbox.north = topleft.lat;
trk->bbox.east = bottomright.lon;
}
/**
+ * vik_track_anonymize_times:
+ *
+ * Shift all timestamps to be relatively offset from 1901-01-01
+ */
+void vik_track_anonymize_times ( VikTrack *tr )
+{
+ GTimeVal gtv;
+ g_time_val_from_iso8601 ( "1901-01-01T00:00:00Z", >v );
+
+ time_t anon_timestamp = gtv.tv_sec;
+ time_t offset = 0;
+
+ GList *tp_iter;
+ tp_iter = tr->trackpoints;
+ while ( tp_iter ) {
+ VikTrackpoint *tp = VIK_TRACKPOINT(tp_iter->data);
+ if ( tp->has_timestamp ) {
+ // Calculate an offset in time using the first available timestamp
+ if ( offset == 0 )
+ offset = tp->timestamp - anon_timestamp;
+
+ // Apply this offset to shift all timestamps towards 1901 & hence anonymising the time
+ // Note that the relative difference between timestamps is kept - thus calculating speeds will still work
+ tp->timestamp = tp->timestamp - offset;
+ }
+ tp_iter = tp_iter->next;
+ }
+}
+
+
+/**
+ * vik_track_apply_dem_data:
+ * @skip_existing: When TRUE, don't change the elevation if the trackpoint already has a value
*
+ * Set elevation data for a track using any available DEM information
*/
-void vik_track_apply_dem_data ( VikTrack *tr )
+gulong vik_track_apply_dem_data ( VikTrack *tr, gboolean skip_existing )
{
+ gulong num = 0;
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;
+ // Don't apply if the point already has a value and the overwrite is off
+ if ( !(skip_existing && VIK_TRACKPOINT(tp_iter->data)->altitude != VIK_DEFAULT_ALTITUDE) ) {
+ /* 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;
+ num++;
+ }
+ }
tp_iter = tp_iter->next;
}
+ return num;
}
/**
}
}
+
+/**
+ * smoothie:
+ *
+ * Apply elevation smoothing over range of trackpoints between the list start and end points
+ */
+static void smoothie ( GList *tp1, GList *tp2, gdouble elev1, gdouble elev2, guint points )
+{
+ // If was really clever could try and weigh interpolation according to the distance between trackpoints somehow
+ // Instead a simple average interpolation for the number of points given.
+ gdouble change = (elev2 - elev1)/(points+1);
+ gint count = 1;
+ GList *tp_iter = tp1;
+ while ( tp_iter != tp2 && tp_iter ) {
+ VikTrackpoint *tp = VIK_TRACKPOINT(tp_iter->data);
+
+ tp->altitude = elev1 + (change*count);
+
+ count++;
+ tp_iter = tp_iter->next;
+ }
+}
+
+/**
+ * vik_track_smooth_missing_elevation_data:
+ * @flat: Specify how the missing elevations will be set.
+ * When TRUE it uses a simple flat method, using the last known elevation
+ * When FALSE is uses an interpolation method to the next known elevation
+ *
+ * For each point with a missing elevation, set it to use the last known available elevation value.
+ * Primarily of use for smallish DEM holes where it is missing elevation data.
+ * Eg see Austria: around N47.3 & E13.8
+ *
+ * Returns: The number of points that were adjusted
+ */
+gulong vik_track_smooth_missing_elevation_data ( VikTrack *tr, gboolean flat )
+{
+ gulong num = 0;
+
+ GList *tp_iter;
+ gdouble elev = VIK_DEFAULT_ALTITUDE;
+
+ VikTrackpoint *tp_missing = NULL;
+ GList *iter_first = NULL;
+ guint points = 0;
+
+ tp_iter = tr->trackpoints;
+ while ( tp_iter ) {
+ VikTrackpoint *tp = VIK_TRACKPOINT(tp_iter->data);
+
+ if ( VIK_DEFAULT_ALTITUDE == tp->altitude ) {
+ if ( flat ) {
+ // Simply assign to last known value
+ if ( elev != VIK_DEFAULT_ALTITUDE ) {
+ tp->altitude = elev;
+ num++;
+ }
+ }
+ else {
+ if ( !tp_missing ) {
+ // Remember the first trackpoint (and the list pointer to it) of a section of no altitudes
+ tp_missing = tp;
+ iter_first = tp_iter;
+ points = 1;
+ }
+ else {
+ // More missing altitudes
+ points++;
+ }
+ }
+ }
+ else {
+ // Altitude available (maybe again!)
+ // If this marks the end of a section of altitude-less points
+ // then apply smoothing for that section of points
+ if ( points > 0 && elev != VIK_DEFAULT_ALTITUDE )
+ if ( !flat ) {
+ smoothie ( iter_first, tp_iter, elev, tp->altitude, points );
+ num = num + points;
+ }
+
+ // reset
+ points = 0;
+ tp_missing = NULL;
+
+ // Store for reuse as the last known good value
+ elev = tp->altitude;
+ }
+
+ tp_iter = tp_iter->next;
+ }
+
+ return num;
+}
+
/**
* vik_track_steal_and_append_trackpoints:
*
projects / andy / viking.git / blobdiff